avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/clk/Kconfig

@@ -0,0 +1,26 @@
+menu "Clock"
+
+config CLK
+	bool "Enable clock driver support"
+	depends on DM
+	help
+	  This allows drivers to be provided for clock generators, including
+	  oscillators and PLLs. Devices can use a common clock API to request
+	  a particular clock rate and check on available clocks. Clocks can
+	  feed into other clocks in a tree structure, with multiplexers to
+	  choose the source for each clock.
+
+config SPL_CLK
+	bool "Enable clock support in SPL"
+	depends on CLK
+	help
+	  The clock subsystem adds a small amount of overhead to the image.
+	  If this is acceptable and you have a need to use clock drivers in
+	  SPL, enable this option. It might provide a cleaner interface to
+	  setting up clocks within SPL, and allows the same drivers to be
+	  used as U-Boot proper.
+
+source "drivers/clk/uniphier/Kconfig"
+source "drivers/clk/exynos/Kconfig"
+
+endmenu

u-boot/drivers/clk/Makefile

@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2015 Google, Inc
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:      GPL-2.0+
+#
+
+obj-$(CONFIG_CLK) += clk-uclass.o clk_fixed_rate.o
+obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o
+obj-$(CONFIG_ROCKCHIP_RK3288) += clk_rk3288.o
+obj-$(CONFIG_SANDBOX) += clk_sandbox.o
+obj-$(CONFIG_SANDBOX) += clk_sandbox_test.o
+obj-$(CONFIG_MACH_PIC32) += clk_pic32.o
+obj-$(CONFIG_CLK_UNIPHIER) += uniphier/
+obj-$(CONFIG_CLK_EXYNOS) += exynos/

u-boot/drivers/clk/clk-uclass.c

@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static inline struct clk_ops *clk_dev_ops(struct udevice *dev)
+{
+	return (struct clk_ops *)dev->driver->ops;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+#ifdef CONFIG_SPL_BUILD
+int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
+{
+	int ret;
+	u32 cell[2];
+
+	if (index != 0)
+		return -ENOSYS;
+	assert(clk);
+	ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev);
+	if (ret)
+		return ret;
+	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clocks",
+				   cell, 2);
+	if (ret)
+		return ret;
+	clk->id = cell[1];
+	return 0;
+}
+
+int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
+{
+	return -ENOSYS;
+}
+#else
+static int clk_of_xlate_default(struct clk *clk,
+				struct fdtdec_phandle_args *args)
+{
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (args->args_count > 1) {
+		debug("Invaild args_count: %d\n", args->args_count);
+		return -EINVAL;
+	}
+
+	if (args->args_count)
+		clk->id = args->args[0];
+	else
+		clk->id = 0;
+
+	return 0;
+}
+
+int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
+{
+	int ret;
+	struct fdtdec_phandle_args args;
+	struct udevice *dev_clk;
+	struct clk_ops *ops;
+
+	debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
+
+	assert(clk);
+	ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
+					     "clocks", "#clock-cells", 0, index,
+					     &args);
+	if (ret) {
+		debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n",
+		      __func__, ret);
+		return ret;
+	}
+
+	ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, &dev_clk);
+	if (ret) {
+		debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
+		      __func__, ret);
+		return ret;
+	}
+	ops = clk_dev_ops(dev_clk);
+
+	if (ops->of_xlate)
+		ret = ops->of_xlate(clk, &args);
+	else
+		ret = clk_of_xlate_default(clk, &args);
+	if (ret) {
+		debug("of_xlate() failed: %d\n", ret);
+		return ret;
+	}
+
+	return clk_request(dev_clk, clk);
+}
+
+int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
+{
+	int index;
+
+	debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk);
+
+	index = fdt_find_string(gd->fdt_blob, dev->of_offset, "clock-names",
+				name);
+	if (index < 0) {
+		debug("fdt_find_string() failed: %d\n", index);
+		return index;
+	}
+
+	return clk_get_by_index(dev, index, clk);
+}
+#endif
+#endif
+
+int clk_request(struct udevice *dev, struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(dev);
+
+	debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk);
+
+	clk->dev = dev;
+
+	if (!ops->request)
+		return 0;
+
+	return ops->request(clk);
+}
+
+int clk_free(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->free)
+		return 0;
+
+	return ops->free(clk);
+}
+
+ulong clk_get_rate(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->get_rate)
+		return -ENOSYS;
+
+	return ops->get_rate(clk);
+}
+
+ulong clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
+
+	if (!ops->set_rate)
+		return -ENOSYS;
+
+	return ops->set_rate(clk, rate);
+}
+
+int clk_enable(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->enable)
+		return -ENOSYS;
+
+	return ops->enable(clk);
+}
+
+int clk_disable(struct clk *clk)
+{
+	struct clk_ops *ops = clk_dev_ops(clk->dev);
+
+	debug("%s(clk=%p)\n", __func__, clk);
+
+	if (!ops->disable)
+		return -ENOSYS;
+
+	return ops->disable(clk);
+}
+
+UCLASS_DRIVER(clk) = {
+	.id		= UCLASS_CLK,
+	.name		= "clk",
+};

u-boot/drivers/clk/clk_fixed_rate.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct clk_fixed_rate {
+	unsigned long fixed_rate;
+};
+
+#define to_clk_fixed_rate(dev)	((struct clk_fixed_rate *)dev_get_platdata(dev))
+
+static ulong clk_fixed_rate_get_rate(struct clk *clk)
+{
+	if (clk->id != 0)
+		return -EINVAL;
+
+	return to_clk_fixed_rate(clk->dev)->fixed_rate;
+}
+
+const struct clk_ops clk_fixed_rate_ops = {
+	.get_rate = clk_fixed_rate_get_rate,
+};
+
+static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
+{
+	to_clk_fixed_rate(dev)->fixed_rate =
+				fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+					       "clock-frequency", 0);
+
+	return 0;
+}
+
+static const struct udevice_id clk_fixed_rate_match[] = {
+	{
+		.compatible = "fixed-clock",
+	},
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(clk_fixed_rate) = {
+	.name = "fixed_rate_clock",
+	.id = UCLASS_CLK,
+	.of_match = clk_fixed_rate_match,
+	.ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata,
+	.platdata_auto_alloc_size = sizeof(struct clk_fixed_rate),
+	.ops = &clk_fixed_rate_ops,
+};

u-boot/drivers/clk/clk_pic32.c

@@ -0,0 +1,425 @@
+/*
+ * Copyright (C) 2015 Purna Chandra Mandal <purna.mandal@microchip.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <div64.h>
+#include <wait_bit.h>
+#include <dm/lists.h>
+#include <asm/io.h>
+#include <mach/pic32.h>
+#include <dt-bindings/clock/microchip,clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Primary oscillator */
+#define SYS_POSC_CLK_HZ	24000000
+
+/* FRC clk rate */
+#define SYS_FRC_CLK_HZ	8000000
+
+/* Clock Registers */
+#define OSCCON		0x0000
+#define OSCTUNE		0x0010
+#define SPLLCON		0x0020
+#define REFO1CON	0x0080
+#define REFO1TRIM	0x0090
+#define PB1DIV		0x0140
+
+/* SPLL */
+#define ICLK_MASK	0x00000080
+#define PLLIDIV_MASK	0x00000007
+#define PLLODIV_MASK	0x00000007
+#define CUROSC_MASK	0x00000007
+#define PLLMUL_MASK	0x0000007F
+#define FRCDIV_MASK	0x00000007
+
+/* PBCLK */
+#define PBDIV_MASK	0x00000007
+
+/* SYSCLK MUX */
+#define SCLK_SRC_FRC1	0
+#define SCLK_SRC_SPLL	1
+#define SCLK_SRC_POSC	2
+#define SCLK_SRC_FRC2	7
+
+/* Reference Oscillator Control Reg fields */
+#define REFO_SEL_MASK	0x0f
+#define REFO_SEL_SHIFT	0
+#define REFO_ACTIVE	BIT(8)
+#define REFO_DIVSW_EN	BIT(9)
+#define REFO_OE		BIT(12)
+#define REFO_ON		BIT(15)
+#define REFO_DIV_SHIFT	16
+#define REFO_DIV_MASK	0x7fff
+
+/* Reference Oscillator Trim Register Fields */
+#define REFO_TRIM_REG	0x10
+#define REFO_TRIM_MASK	0x1ff
+#define REFO_TRIM_SHIFT	23
+#define REFO_TRIM_MAX	511
+
+#define ROCLK_SRC_SCLK		0x0
+#define ROCLK_SRC_SPLL		0x7
+#define ROCLK_SRC_ROCLKI	0x8
+
+/* Memory PLL */
+#define MPLL_IDIV		0x3f
+#define MPLL_MULT		0xff
+#define MPLL_ODIV1		0x7
+#define MPLL_ODIV2		0x7
+#define MPLL_VREG_RDY		BIT(23)
+#define MPLL_RDY		BIT(31)
+#define MPLL_IDIV_SHIFT		0
+#define MPLL_MULT_SHIFT		8
+#define MPLL_ODIV1_SHIFT	24
+#define MPLL_ODIV2_SHIFT	27
+#define MPLL_IDIV_INIT		0x03
+#define MPLL_MULT_INIT		0x32
+#define MPLL_ODIV1_INIT		0x02
+#define MPLL_ODIV2_INIT		0x01
+
+struct pic32_clk_priv {
+	void __iomem *iobase;
+	void __iomem *syscfg_base;
+};
+
+static ulong pic32_get_pll_rate(struct pic32_clk_priv *priv)
+{
+	u32 iclk, idiv, odiv, mult;
+	ulong plliclk, v;
+
+	v = readl(priv->iobase + SPLLCON);
+	iclk = (v & ICLK_MASK);
+	idiv = ((v >> 8) & PLLIDIV_MASK) + 1;
+	odiv = ((v >> 24) & PLLODIV_MASK);
+	mult = ((v >> 16) & PLLMUL_MASK) + 1;
+
+	plliclk = iclk ? SYS_FRC_CLK_HZ : SYS_POSC_CLK_HZ;
+
+	if (odiv < 2)
+		odiv = 2;
+	else if (odiv < 5)
+		odiv = (1 << odiv);
+	else
+		odiv = 32;
+
+	return ((plliclk / idiv) * mult) / odiv;
+}
+
+static ulong pic32_get_sysclk(struct pic32_clk_priv *priv)
+{
+	ulong v;
+	ulong hz;
+	ulong div, frcdiv;
+	ulong curr_osc;
+
+	/* get clk source */
+	v = readl(priv->iobase + OSCCON);
+	curr_osc = (v >> 12) & CUROSC_MASK;
+	switch (curr_osc) {
+	case SCLK_SRC_FRC1:
+	case SCLK_SRC_FRC2:
+		frcdiv = ((v >> 24) & FRCDIV_MASK);
+		div = ((1 << frcdiv) + 1) + (128 * (frcdiv == 7));
+		hz = SYS_FRC_CLK_HZ / div;
+		break;
+
+	case SCLK_SRC_SPLL:
+		hz = pic32_get_pll_rate(priv);
+		break;
+
+	case SCLK_SRC_POSC:
+		hz = SYS_POSC_CLK_HZ;
+		break;
+
+	default:
+		hz = 0;
+		printf("clk: unknown sclk_src.\n");
+		break;
+	}
+
+	return hz;
+}
+
+static ulong pic32_get_pbclk(struct pic32_clk_priv *priv, int periph)
+{
+	void __iomem *reg;
+	ulong div, clk_freq;
+
+	WARN_ON((periph < PB1CLK) || (periph > PB7CLK));
+
+	clk_freq = pic32_get_sysclk(priv);
+
+	reg = priv->iobase + PB1DIV + (periph - PB1CLK) * 0x10;
+	div = (readl(reg) & PBDIV_MASK) + 1;
+
+	return clk_freq / div;
+}
+
+static ulong pic32_get_cpuclk(struct pic32_clk_priv *priv)
+{
+	return pic32_get_pbclk(priv, PB7CLK);
+}
+
+static ulong pic32_set_refclk(struct pic32_clk_priv *priv, int periph,
+			      int parent_rate, int rate, int parent_id)
+{
+	void __iomem *reg;
+	u32 div, trim, v;
+	u64 frac;
+
+	WARN_ON((periph < REF1CLK) || (periph > REF5CLK));
+
+	/* calculate dividers,
+	 *   rate = parent_rate / [2 * (div + (trim / 512))]
+	 */
+	if (parent_rate <= rate) {
+		div = 0;
+		trim = 0;
+	} else {
+		div = parent_rate / (rate << 1);
+		frac = parent_rate;
+		frac <<= 8;
+		do_div(frac, rate);
+		frac -= (u64)(div << 9);
+		trim = (frac >= REFO_TRIM_MAX) ? REFO_TRIM_MAX : (u32)frac;
+	}
+
+	reg = priv->iobase + REFO1CON + (periph - REF1CLK) * 0x20;
+
+	/* disable clk */
+	writel(REFO_ON | REFO_OE, reg + _CLR_OFFSET);
+
+	/* wait till previous src change is active */
+	wait_for_bit(__func__, reg, REFO_DIVSW_EN | REFO_ACTIVE,
+		     false, CONFIG_SYS_HZ, false);
+
+	/* parent_id */
+	v = readl(reg);
+	v &= ~(REFO_SEL_MASK << REFO_SEL_SHIFT);
+	v |= (parent_id << REFO_SEL_SHIFT);
+
+	/* apply rodiv */
+	v &= ~(REFO_DIV_MASK << REFO_DIV_SHIFT);
+	v |= (div << REFO_DIV_SHIFT);
+	writel(v, reg);
+
+	/* apply trim */
+	v = readl(reg + REFO_TRIM_REG);
+	v &= ~(REFO_TRIM_MASK << REFO_TRIM_SHIFT);
+	v |= (trim << REFO_TRIM_SHIFT);
+	writel(v, reg + REFO_TRIM_REG);
+
+	/* enable clk */
+	writel(REFO_ON | REFO_OE, reg + _SET_OFFSET);
+
+	/* switch divider */
+	writel(REFO_DIVSW_EN, reg + _SET_OFFSET);
+
+	/* wait for divider switching to complete */
+	return wait_for_bit(__func__, reg, REFO_DIVSW_EN, false,
+			    CONFIG_SYS_HZ, false);
+}
+
+static ulong pic32_get_refclk(struct pic32_clk_priv *priv, int periph)
+{
+	u32 rodiv, rotrim, rosel, v, parent_rate;
+	void __iomem *reg;
+	u64 rate64;
+
+	WARN_ON((periph < REF1CLK) || (periph > REF5CLK));
+
+	reg = priv->iobase + REFO1CON + (periph - REF1CLK) * 0x20;
+	v = readl(reg);
+	/* get rosel */
+	rosel = (v >> REFO_SEL_SHIFT) & REFO_SEL_MASK;
+	/* get div */
+	rodiv = (v >> REFO_DIV_SHIFT) & REFO_DIV_MASK;
+
+	/* get trim */
+	v = readl(reg + REFO_TRIM_REG);
+	rotrim = (v >> REFO_TRIM_SHIFT) & REFO_TRIM_MASK;
+
+	if (!rodiv)
+		return 0;
+
+	/* get parent rate */
+	switch (rosel) {
+	case ROCLK_SRC_SCLK:
+		parent_rate = pic32_get_cpuclk(priv);
+		break;
+	case ROCLK_SRC_SPLL:
+		parent_rate = pic32_get_pll_rate(priv);
+		break;
+	default:
+		parent_rate = 0;
+		break;
+	}
+
+	/* Calculation
+	 * rate = parent_rate / [2 * (div + (trim / 512))]
+	 */
+	if (rotrim) {
+		rodiv <<= 9;
+		rodiv += rotrim;
+		rate64 = parent_rate;
+		rate64 <<= 8;
+		do_div(rate64, rodiv);
+		v = (u32)rate64;
+	} else {
+		v = parent_rate / (rodiv << 1);
+	}
+	return v;
+}
+
+static ulong pic32_get_mpll_rate(struct pic32_clk_priv *priv)
+{
+	u32 v, idiv, mul;
+	u32 odiv1, odiv2;
+	u64 rate;
+
+	v = readl(priv->syscfg_base + CFGMPLL);
+	idiv = v & MPLL_IDIV;
+	mul = (v >> MPLL_MULT_SHIFT) & MPLL_MULT;
+	odiv1 = (v >> MPLL_ODIV1_SHIFT) & MPLL_ODIV1;
+	odiv2 = (v >> MPLL_ODIV2_SHIFT) & MPLL_ODIV2;
+
+	rate = (SYS_POSC_CLK_HZ / idiv) * mul;
+	do_div(rate, odiv1);
+	do_div(rate, odiv2);
+
+	return (ulong)rate;
+}
+
+static int pic32_mpll_init(struct pic32_clk_priv *priv)
+{
+	u32 v, mask;
+
+	/* initialize */
+	v = (MPLL_IDIV_INIT << MPLL_IDIV_SHIFT) |
+	    (MPLL_MULT_INIT << MPLL_MULT_SHIFT) |
+	    (MPLL_ODIV1_INIT << MPLL_ODIV1_SHIFT) |
+	    (MPLL_ODIV2_INIT << MPLL_ODIV2_SHIFT);
+
+	writel(v, priv->syscfg_base + CFGMPLL);
+
+	/* Wait for ready */
+	mask = MPLL_RDY | MPLL_VREG_RDY;
+	return wait_for_bit(__func__, priv->syscfg_base + CFGMPLL, mask,
+			    true, get_tbclk(), false);
+}
+
+static void pic32_clk_init(struct udevice *dev)
+{
+	const void *blob = gd->fdt_blob;
+	struct pic32_clk_priv *priv;
+	ulong rate, pll_hz;
+	char propname[50];
+	int i;
+
+	priv = dev_get_priv(dev);
+	pll_hz = pic32_get_pll_rate(priv);
+
+	/* Initialize REFOs as not initialized and enabled on reset. */
+	for (i = REF1CLK; i <= REF5CLK; i++) {
+		snprintf(propname, sizeof(propname),
+			 "microchip,refo%d-frequency", i - REF1CLK + 1);
+		rate = fdtdec_get_int(blob, dev->of_offset, propname, 0);
+		if (rate)
+			pic32_set_refclk(priv, i, pll_hz, rate, ROCLK_SRC_SPLL);
+	}
+
+	/* Memory PLL */
+	pic32_mpll_init(priv);
+}
+
+static ulong pic32_get_rate(struct clk *clk)
+{
+	struct pic32_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong rate;
+
+	switch (clk->id) {
+	case PB1CLK ... PB7CLK:
+		rate = pic32_get_pbclk(priv, clk->id);
+		break;
+	case REF1CLK ... REF5CLK:
+		rate = pic32_get_refclk(priv, clk->id);
+		break;
+	case PLLCLK:
+		rate = pic32_get_pll_rate(priv);
+		break;
+	case MPLL:
+		rate = pic32_get_mpll_rate(priv);
+		break;
+	default:
+		rate = 0;
+		break;
+	}
+
+	return rate;
+}
+
+static ulong pic32_set_rate(struct clk *clk, ulong rate)
+{
+	struct pic32_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong pll_hz;
+
+	switch (clk->id) {
+	case REF1CLK ... REF5CLK:
+		pll_hz = pic32_get_pll_rate(priv);
+		pic32_set_refclk(priv, clk->id, pll_hz, rate, ROCLK_SRC_SPLL);
+		break;
+	default:
+		break;
+	}
+
+	return rate;
+}
+
+static struct clk_ops pic32_pic32_clk_ops = {
+	.set_rate = pic32_set_rate,
+	.get_rate = pic32_get_rate,
+};
+
+static int pic32_clk_probe(struct udevice *dev)
+{
+	struct pic32_clk_priv *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
+	fdt_size_t size;
+
+	addr = fdtdec_get_addr_size(gd->fdt_blob, dev->of_offset, "reg", &size);
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	priv->iobase = ioremap(addr, size);
+	if (!priv->iobase)
+		return -EINVAL;
+
+	priv->syscfg_base = pic32_get_syscfg_base();
+
+	/* initialize clocks */
+	pic32_clk_init(dev);
+
+	return 0;
+}
+
+static const struct udevice_id pic32_clk_ids[] = {
+	{ .compatible = "microchip,pic32mzda-clk"},
+	{}
+};
+
+U_BOOT_DRIVER(pic32_clk) = {
+	.name		= "pic32_clk",
+	.id		= UCLASS_CLK,
+	.of_match	= pic32_clk_ids,
+	.flags		= DM_FLAG_PRE_RELOC,
+	.ops		= &pic32_pic32_clk_ops,
+	.probe		= pic32_clk_probe,
+	.priv_auto_alloc_size = sizeof(struct pic32_clk_priv),
+};

u-boot/drivers/clk/clk_rk3036.c

@@ -0,0 +1,386 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3036.h>
+#include <asm/arch/hardware.h>
+#include <dm/lists.h>
+#include <dt-bindings/clock/rk3036-cru.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct rk3036_clk_priv {
+	struct rk3036_cru *cru;
+	ulong rate;
+};
+
+enum {
+	VCO_MAX_HZ	= 2400U * 1000000,
+	VCO_MIN_HZ	= 600 * 1000000,
+	OUTPUT_MAX_HZ	= 2400U * 1000000,
+	OUTPUT_MIN_HZ	= 24 * 1000000,
+};
+
+#define RATE_TO_DIV(input_rate, output_rate) \
+	((input_rate) / (output_rate) - 1);
+
+#define DIV_TO_RATE(input_rate, div)	((input_rate) / ((div) + 1))
+
+#define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
+	.refdiv = _refdiv,\
+	.fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\
+	.postdiv1 = _postdiv1, .postdiv2 = _postdiv2};\
+	_Static_assert(((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ) *\
+			 OSC_HZ / (_refdiv * _postdiv1 * _postdiv2) == hz,\
+			 #hz "Hz cannot be hit with PLL "\
+			 "divisors on line " __stringify(__LINE__));
+
+/* use interge mode*/
+static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 3, 1);
+static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2, 1);
+
+static inline unsigned int log2(unsigned int value)
+{
+	return fls(value) - 1;
+}
+
+void *rockchip_get_cru(void)
+{
+	struct udevice *dev;
+	fdt_addr_t addr;
+	int ret;
+
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
+	if (ret)
+		return ERR_PTR(ret);
+
+	addr = dev_get_addr(dev);
+	if (addr == FDT_ADDR_T_NONE)
+		return ERR_PTR(-EINVAL);
+
+	return (void *)addr;
+}
+
+static int rkclk_set_pll(struct rk3036_cru *cru, enum rk_clk_id clk_id,
+			 const struct pll_div *div)
+{
+	int pll_id = rk_pll_id(clk_id);
+	struct rk3036_pll *pll = &cru->pll[pll_id];
+
+	/* All PLLs have same VCO and output frequency range restrictions. */
+	uint vco_hz = OSC_HZ / 1000 * div->fbdiv / div->refdiv * 1000;
+	uint output_hz = vco_hz / div->postdiv1 / div->postdiv2;
+
+	debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, postdiv2=%d,\
+		 vco=%u Hz, output=%u Hz\n",
+			pll, div->fbdiv, div->refdiv, div->postdiv1,
+			div->postdiv2, vco_hz, output_hz);
+	assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
+	       output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ);
+
+	/* use interger mode */
+	rk_clrreg(&pll->con1, 1 << PLL_DSMPD_SHIFT);
+
+	rk_clrsetreg(&pll->con0,
+		     PLL_POSTDIV1_MASK << PLL_POSTDIV1_SHIFT | PLL_FBDIV_MASK,
+		     (div->postdiv1 << PLL_POSTDIV1_SHIFT) | div->fbdiv);
+	rk_clrsetreg(&pll->con1, PLL_POSTDIV2_MASK << PLL_POSTDIV2_SHIFT |
+			PLL_REFDIV_MASK << PLL_REFDIV_SHIFT,
+			(div->postdiv2 << PLL_POSTDIV2_SHIFT |
+			 div->refdiv << PLL_REFDIV_SHIFT));
+
+	/* waiting for pll lock */
+	while (readl(&pll->con1) & (1 << PLL_LOCK_STATUS_SHIFT))
+		udelay(1);
+
+	return 0;
+}
+
+static void rkclk_init(struct rk3036_cru *cru)
+{
+	u32 aclk_div;
+	u32 hclk_div;
+	u32 pclk_div;
+
+	/* pll enter slow-mode */
+	rk_clrsetreg(&cru->cru_mode_con,
+		     GPLL_MODE_MASK << GPLL_MODE_SHIFT |
+		     APLL_MODE_MASK << APLL_MODE_SHIFT,
+		     GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
+		     APLL_MODE_SLOW << APLL_MODE_SHIFT);
+
+	/* init pll */
+	rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg);
+	rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
+
+	/*
+	 * select apll as core clock pll source and
+	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
+	 * core hz : apll = 1:1
+	 */
+	aclk_div = APLL_HZ / CORE_ACLK_HZ - 1;
+	assert((aclk_div + 1) * CORE_ACLK_HZ == APLL_HZ && aclk_div < 0x7);
+
+	pclk_div = APLL_HZ / CORE_PERI_HZ - 1;
+	assert((pclk_div + 1) * CORE_PERI_HZ == APLL_HZ && pclk_div < 0xf);
+
+	rk_clrsetreg(&cru->cru_clksel_con[0],
+		     CORE_CLK_PLL_SEL_MASK << CORE_CLK_PLL_SEL_SHIFT |
+		     CORE_DIV_CON_MASK << CORE_DIV_CON_SHIFT,
+		     CORE_CLK_PLL_SEL_APLL << CORE_CLK_PLL_SEL_SHIFT |
+		     0 << CORE_DIV_CON_SHIFT);
+
+	rk_clrsetreg(&cru->cru_clksel_con[1],
+		     CORE_ACLK_DIV_MASK << CORE_ACLK_DIV_SHIFT |
+		     CORE_PERI_DIV_MASK << CORE_PERI_DIV_SHIFT,
+		     aclk_div << CORE_ACLK_DIV_SHIFT |
+		     pclk_div << CORE_PERI_DIV_SHIFT);
+
+	/*
+	 * select apll as cpu clock pll source and
+	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
+	 */
+	aclk_div = APLL_HZ / CPU_ACLK_HZ - 1;
+	assert((aclk_div + 1) * CPU_ACLK_HZ == APLL_HZ && aclk_div < 0x1f);
+
+	pclk_div = APLL_HZ / CPU_PCLK_HZ - 1;
+	assert((pclk_div + 1) * CPU_PCLK_HZ == APLL_HZ && pclk_div < 0x7);
+
+	hclk_div = APLL_HZ / CPU_HCLK_HZ - 1;
+	assert((hclk_div + 1) * CPU_HCLK_HZ == APLL_HZ && hclk_div < 0x3);
+
+	rk_clrsetreg(&cru->cru_clksel_con[0],
+		     CPU_CLK_PLL_SEL_MASK << CPU_CLK_PLL_SEL_SHIFT |
+		     ACLK_CPU_DIV_MASK << ACLK_CPU_DIV_SHIFT,
+		     CPU_CLK_PLL_SEL_APLL << CPU_CLK_PLL_SEL_SHIFT |
+		     aclk_div << ACLK_CPU_DIV_SHIFT);
+
+	rk_clrsetreg(&cru->cru_clksel_con[1],
+		     CPU_PCLK_DIV_MASK << CPU_PCLK_DIV_SHIFT |
+		     CPU_HCLK_DIV_MASK << CPU_HCLK_DIV_SHIFT,
+		     pclk_div << CPU_PCLK_DIV_SHIFT |
+		     hclk_div << CPU_HCLK_DIV_SHIFT);
+
+	/*
+	 * select gpll as peri clock pll source and
+	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
+	 */
+	aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
+	assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
+
+	hclk_div = log2(PERI_ACLK_HZ / PERI_HCLK_HZ);
+	assert((1 << hclk_div) * PERI_HCLK_HZ ==
+		PERI_ACLK_HZ && (pclk_div < 0x4));
+
+	pclk_div = log2(PERI_ACLK_HZ / PERI_PCLK_HZ);
+	assert((1 << pclk_div) * PERI_PCLK_HZ ==
+		PERI_ACLK_HZ && pclk_div < 0x8);
+
+	rk_clrsetreg(&cru->cru_clksel_con[10],
+		     PERI_PLL_SEL_MASK << PERI_PLL_SEL_SHIFT |
+		     PERI_PCLK_DIV_MASK << PERI_PCLK_DIV_SHIFT |
+		     PERI_HCLK_DIV_MASK << PERI_HCLK_DIV_SHIFT |
+		     PERI_ACLK_DIV_MASK << PERI_ACLK_DIV_SHIFT,
+		     PERI_PLL_GPLL << PERI_PLL_SEL_SHIFT |
+		     pclk_div << PERI_PCLK_DIV_SHIFT |
+		     hclk_div << PERI_HCLK_DIV_SHIFT |
+		     aclk_div << PERI_ACLK_DIV_SHIFT);
+
+	/* PLL enter normal-mode */
+	rk_clrsetreg(&cru->cru_mode_con,
+		     GPLL_MODE_MASK << GPLL_MODE_SHIFT |
+		     APLL_MODE_MASK << APLL_MODE_SHIFT,
+		     GPLL_MODE_NORM << GPLL_MODE_SHIFT |
+		     APLL_MODE_NORM << APLL_MODE_SHIFT);
+}
+
+/* Get pll rate by id */
+static uint32_t rkclk_pll_get_rate(struct rk3036_cru *cru,
+				   enum rk_clk_id clk_id)
+{
+	uint32_t refdiv, fbdiv, postdiv1, postdiv2;
+	uint32_t con;
+	int pll_id = rk_pll_id(clk_id);
+	struct rk3036_pll *pll = &cru->pll[pll_id];
+	static u8 clk_shift[CLK_COUNT] = {
+		0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, 0xff,
+		GPLL_MODE_SHIFT, 0xff
+	};
+	static u8 clk_mask[CLK_COUNT] = {
+		0xff, APLL_MODE_MASK, DPLL_MODE_MASK, 0xff,
+		GPLL_MODE_MASK, 0xff
+	};
+	uint shift;
+	uint mask;
+
+	con = readl(&cru->cru_mode_con);
+	shift = clk_shift[clk_id];
+	mask = clk_mask[clk_id];
+
+	switch ((con >> shift) & mask) {
+	case GPLL_MODE_SLOW:
+		return OSC_HZ;
+	case GPLL_MODE_NORM:
+
+		/* normal mode */
+		con = readl(&pll->con0);
+		postdiv1 = (con >> PLL_POSTDIV1_SHIFT) & PLL_POSTDIV1_MASK;
+		fbdiv = (con >> PLL_FBDIV_SHIFT) & PLL_FBDIV_MASK;
+		con = readl(&pll->con1);
+		postdiv2 = (con >> PLL_POSTDIV2_SHIFT) & PLL_POSTDIV2_MASK;
+		refdiv = (con >> PLL_REFDIV_SHIFT) & PLL_REFDIV_MASK;
+		return (24 * fbdiv / (refdiv * postdiv1 * postdiv2)) * 1000000;
+	case GPLL_MODE_DEEP:
+	default:
+		return 32768;
+	}
+}
+
+static ulong rockchip_mmc_get_clk(struct rk3036_cru *cru, uint clk_general_rate,
+				  int periph)
+{
+	uint src_rate;
+	uint div, mux;
+	u32 con;
+
+	switch (periph) {
+	case HCLK_EMMC:
+		con = readl(&cru->cru_clksel_con[12]);
+		mux = (con >> EMMC_PLL_SHIFT) & EMMC_PLL_MASK;
+		div = (con >> EMMC_DIV_SHIFT) & EMMC_DIV_MASK;
+		break;
+	case HCLK_SDIO:
+		con = readl(&cru->cru_clksel_con[12]);
+		mux = (con >> MMC0_PLL_SHIFT) & MMC0_PLL_MASK;
+		div = (con >> MMC0_DIV_SHIFT) & MMC0_DIV_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	src_rate = mux == EMMC_SEL_24M ? OSC_HZ : clk_general_rate;
+	return DIV_TO_RATE(src_rate, div);
+}
+
+static ulong rockchip_mmc_set_clk(struct rk3036_cru *cru, uint clk_general_rate,
+				  int periph, uint freq)
+{
+	int src_clk_div;
+	int mux;
+
+	debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate);
+
+	/* mmc clock auto divide 2 in internal */
+	src_clk_div = (clk_general_rate / 2 + freq - 1) / freq;
+
+	if (src_clk_div > 0x7f) {
+		src_clk_div = (OSC_HZ / 2 + freq - 1) / freq;
+		mux = EMMC_SEL_24M;
+	} else {
+		mux = EMMC_SEL_GPLL;
+	}
+
+	switch (periph) {
+	case HCLK_EMMC:
+		rk_clrsetreg(&cru->cru_clksel_con[12],
+			     EMMC_PLL_MASK << EMMC_PLL_SHIFT |
+			     EMMC_DIV_MASK << EMMC_DIV_SHIFT,
+			     mux << EMMC_PLL_SHIFT |
+			     (src_clk_div - 1) << EMMC_DIV_SHIFT);
+		break;
+	case HCLK_SDIO:
+		rk_clrsetreg(&cru->cru_clksel_con[11],
+			     MMC0_PLL_MASK << MMC0_PLL_SHIFT |
+			     MMC0_DIV_MASK << MMC0_DIV_SHIFT,
+			     mux << MMC0_PLL_SHIFT |
+			     (src_clk_div - 1) << MMC0_DIV_SHIFT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return rockchip_mmc_get_clk(cru, clk_general_rate, periph);
+}
+
+static ulong rk3036_clk_get_rate(struct clk *clk)
+{
+	struct rk3036_clk_priv *priv = dev_get_priv(clk->dev);
+
+	switch (clk->id) {
+	case 0 ... 63:
+		return rkclk_pll_get_rate(priv->cru, clk->id);
+	default:
+		return -ENOENT;
+	}
+}
+
+static ulong rk3036_clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct rk3036_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong new_rate, gclk_rate;
+
+	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
+	switch (clk->id) {
+	case 0 ... 63:
+		return 0;
+	case HCLK_EMMC:
+		new_rate = rockchip_mmc_set_clk(priv->cru, gclk_rate,
+						clk->id, rate);
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	return new_rate;
+}
+
+static struct clk_ops rk3036_clk_ops = {
+	.get_rate	= rk3036_clk_get_rate,
+	.set_rate	= rk3036_clk_set_rate,
+};
+
+static int rk3036_clk_probe(struct udevice *dev)
+{
+	struct rk3036_clk_priv *priv = dev_get_priv(dev);
+
+	priv->cru = (struct rk3036_cru *)dev_get_addr(dev);
+	rkclk_init(priv->cru);
+
+	return 0;
+}
+
+static int rk3036_clk_bind(struct udevice *dev)
+{
+	int ret;
+
+	/* The reset driver does not have a device node, so bind it here */
+	ret = device_bind_driver(gd->dm_root, "rk3036_sysreset", "reset", &dev);
+	if (ret)
+		debug("Warning: No RK3036 reset driver: ret=%d\n", ret);
+
+	return 0;
+}
+
+static const struct udevice_id rk3036_clk_ids[] = {
+	{ .compatible = "rockchip,rk3036-cru" },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_rk3036) = {
+	.name		= "clk_rk3036",
+	.id		= UCLASS_CLK,
+	.of_match	= rk3036_clk_ids,
+	.priv_auto_alloc_size = sizeof(struct rk3036_clk_priv),
+	.ops		= &rk3036_clk_ops,
+	.bind		= rk3036_clk_bind,
+	.probe		= rk3036_clk_probe,
+};

u-boot/drivers/clk/clk_rk3288.c

@@ -0,0 +1,824 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3288.h>
+#include <asm/arch/grf_rk3288.h>
+#include <asm/arch/hardware.h>
+#include <dt-bindings/clock/rk3288-cru.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/uclass-internal.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct rk3288_clk_priv {
+	struct rk3288_grf *grf;
+	struct rk3288_cru *cru;
+	ulong rate;
+};
+
+struct pll_div {
+	u32 nr;
+	u32 nf;
+	u32 no;
+};
+
+enum {
+	VCO_MAX_HZ	= 2200U * 1000000,
+	VCO_MIN_HZ	= 440 * 1000000,
+	OUTPUT_MAX_HZ	= 2200U * 1000000,
+	OUTPUT_MIN_HZ	= 27500000,
+	FREF_MAX_HZ	= 2200U * 1000000,
+	FREF_MIN_HZ	= 269 * 1000000,
+};
+
+enum {
+	/* PLL CON0 */
+	PLL_OD_MASK		= 0x0f,
+
+	/* PLL CON1 */
+	PLL_NF_MASK		= 0x1fff,
+
+	/* PLL CON2 */
+	PLL_BWADJ_MASK		= 0x0fff,
+
+	/* PLL CON3 */
+	PLL_RESET_SHIFT		= 5,
+
+	/* CLKSEL0 */
+	CORE_SEL_PLL_MASK	= 1,
+	CORE_SEL_PLL_SHIFT	= 15,
+	A17_DIV_MASK		= 0x1f,
+	A17_DIV_SHIFT		= 8,
+	MP_DIV_MASK		= 0xf,
+	MP_DIV_SHIFT		= 4,
+	M0_DIV_MASK		= 0xf,
+	M0_DIV_SHIFT		= 0,
+
+	/* CLKSEL1: pd bus clk pll sel: codec or general */
+	PD_BUS_SEL_PLL_MASK	= 15,
+	PD_BUS_SEL_CPLL		= 0,
+	PD_BUS_SEL_GPLL,
+
+	/* pd bus pclk div: pclk = pd_bus_aclk /(div + 1) */
+	PD_BUS_PCLK_DIV_SHIFT	= 12,
+	PD_BUS_PCLK_DIV_MASK	= 7,
+
+	/* pd bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */
+	PD_BUS_HCLK_DIV_SHIFT	= 8,
+	PD_BUS_HCLK_DIV_MASK	= 3,
+
+	/* pd bus aclk div: pd_bus_aclk = pd_bus_src_clk /(div0 * div1) */
+	PD_BUS_ACLK_DIV0_SHIFT	= 3,
+	PD_BUS_ACLK_DIV0_MASK	= 0x1f,
+	PD_BUS_ACLK_DIV1_SHIFT	= 0,
+	PD_BUS_ACLK_DIV1_MASK	= 0x7,
+
+	/*
+	 * CLKSEL10
+	 * peripheral bus pclk div:
+	 * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1
+	 */
+	PERI_SEL_PLL_MASK	 = 1,
+	PERI_SEL_PLL_SHIFT	 = 15,
+	PERI_SEL_CPLL		= 0,
+	PERI_SEL_GPLL,
+
+	PERI_PCLK_DIV_SHIFT	= 12,
+	PERI_PCLK_DIV_MASK	= 3,
+
+	/* peripheral bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */
+	PERI_HCLK_DIV_SHIFT	= 8,
+	PERI_HCLK_DIV_MASK	= 3,
+
+	/*
+	 * peripheral bus aclk div:
+	 *    aclk_periph = periph_clk_src / (peri_aclk_div_con + 1)
+	 */
+	PERI_ACLK_DIV_SHIFT	= 0,
+	PERI_ACLK_DIV_MASK	= 0x1f,
+
+	SOCSTS_DPLL_LOCK	= 1 << 5,
+	SOCSTS_APLL_LOCK	= 1 << 6,
+	SOCSTS_CPLL_LOCK	= 1 << 7,
+	SOCSTS_GPLL_LOCK	= 1 << 8,
+	SOCSTS_NPLL_LOCK	= 1 << 9,
+};
+
+#define RATE_TO_DIV(input_rate, output_rate) \
+	((input_rate) / (output_rate) - 1);
+
+#define DIV_TO_RATE(input_rate, div)	((input_rate) / ((div) + 1))
+
+#define PLL_DIVISORS(hz, _nr, _no) {\
+	.nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\
+	_Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\
+		       (_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\
+		       "divisors on line " __stringify(__LINE__));
+
+/* Keep divisors as low as possible to reduce jitter and power usage */
+static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1);
+static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
+static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
+
+void *rockchip_get_cru(void)
+{
+	struct rk3288_clk_priv *priv;
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
+	if (ret)
+		return ERR_PTR(ret);
+
+	priv = dev_get_priv(dev);
+
+	return priv->cru;
+}
+
+static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id,
+			 const struct pll_div *div)
+{
+	int pll_id = rk_pll_id(clk_id);
+	struct rk3288_pll *pll = &cru->pll[pll_id];
+	/* All PLLs have same VCO and output frequency range restrictions. */
+	uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000;
+	uint output_hz = vco_hz / div->no;
+
+	debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n",
+	      (uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz);
+	assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
+	       output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ &&
+	       (div->no == 1 || !(div->no % 2)));
+
+	/* enter reset */
+	rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT);
+
+	rk_clrsetreg(&pll->con0,
+		     CLKR_MASK << CLKR_SHIFT | PLL_OD_MASK,
+		     ((div->nr - 1) << CLKR_SHIFT) | (div->no - 1));
+	rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1);
+	rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1);
+
+	udelay(10);
+
+	/* return from reset */
+	rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT);
+
+	return 0;
+}
+
+static inline unsigned int log2(unsigned int value)
+{
+	return fls(value) - 1;
+}
+
+static int rkclk_configure_ddr(struct rk3288_cru *cru, struct rk3288_grf *grf,
+			       unsigned int hz)
+{
+	static const struct pll_div dpll_cfg[] = {
+		{.nf = 25, .nr = 2, .no = 1},
+		{.nf = 400, .nr = 9, .no = 2},
+		{.nf = 500, .nr = 9, .no = 2},
+		{.nf = 100, .nr = 3, .no = 1},
+	};
+	int cfg;
+
+	switch (hz) {
+	case 300000000:
+		cfg = 0;
+		break;
+	case 533000000:	/* actually 533.3P MHz */
+		cfg = 1;
+		break;
+	case 666000000:	/* actually 666.6P MHz */
+		cfg = 2;
+		break;
+	case 800000000:
+		cfg = 3;
+		break;
+	default:
+		debug("Unsupported SDRAM frequency");
+		return -EINVAL;
+	}
+
+	/* pll enter slow-mode */
+	rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
+		     DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
+
+	rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg]);
+
+	/* wait for pll lock */
+	while (!(readl(&grf->soc_status[1]) & SOCSTS_DPLL_LOCK))
+		udelay(1);
+
+	/* PLL enter normal-mode */
+	rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
+		     DPLL_MODE_NORMAL << DPLL_MODE_SHIFT);
+
+	return 0;
+}
+
+#ifndef CONFIG_SPL_BUILD
+#define VCO_MAX_KHZ	2200000
+#define VCO_MIN_KHZ	440000
+#define FREF_MAX_KHZ	2200000
+#define FREF_MIN_KHZ	269
+
+static int pll_para_config(ulong freq_hz, struct pll_div *div, uint *ext_div)
+{
+	uint ref_khz = OSC_HZ / 1000, nr, nf = 0;
+	uint fref_khz;
+	uint diff_khz, best_diff_khz;
+	const uint max_nr = 1 << 6, max_nf = 1 << 12, max_no = 1 << 4;
+	uint vco_khz;
+	uint no = 1;
+	uint freq_khz = freq_hz / 1000;
+
+	if (!freq_hz) {
+		printf("%s: the frequency can not be 0 Hz\n", __func__);
+		return -EINVAL;
+	}
+
+	no = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz);
+	if (ext_div) {
+		*ext_div = DIV_ROUND_UP(no, max_no);
+		no = DIV_ROUND_UP(no, *ext_div);
+	}
+
+	/* only even divisors (and 1) are supported */
+	if (no > 1)
+		no = DIV_ROUND_UP(no, 2) * 2;
+
+	vco_khz = freq_khz * no;
+	if (ext_div)
+		vco_khz *= *ext_div;
+
+	if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) {
+		printf("%s: Cannot find out a supported VCO for Frequency (%luHz).\n",
+		       __func__, freq_hz);
+		return -1;
+	}
+
+	div->no = no;
+
+	best_diff_khz = vco_khz;
+	for (nr = 1; nr < max_nr && best_diff_khz; nr++) {
+		fref_khz = ref_khz / nr;
+		if (fref_khz < FREF_MIN_KHZ)
+			break;
+		if (fref_khz > FREF_MAX_KHZ)
+			continue;
+
+		nf = vco_khz / fref_khz;
+		if (nf >= max_nf)
+			continue;
+		diff_khz = vco_khz - nf * fref_khz;
+		if (nf + 1 < max_nf && diff_khz > fref_khz / 2) {
+			nf++;
+			diff_khz = fref_khz - diff_khz;
+		}
+
+		if (diff_khz >= best_diff_khz)
+			continue;
+
+		best_diff_khz = diff_khz;
+		div->nr = nr;
+		div->nf = nf;
+	}
+
+	if (best_diff_khz > 4 * 1000) {
+		printf("%s: Failed to match output frequency %lu, difference is %u Hz, exceed 4MHZ\n",
+		       __func__, freq_hz, best_diff_khz * 1000);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rockchip_mac_set_clk(struct rk3288_cru *cru,
+				  int periph, uint freq)
+{
+	/* Assuming mac_clk is fed by an external clock */
+	rk_clrsetreg(&cru->cru_clksel_con[21],
+		     RMII_EXTCLK_MASK << RMII_EXTCLK_SHIFT,
+		     RMII_EXTCLK_SELECT_EXT_CLK << RMII_EXTCLK_SHIFT);
+
+	 return 0;
+}
+
+static int rockchip_vop_set_clk(struct rk3288_cru *cru, struct rk3288_grf *grf,
+				int periph, unsigned int rate_hz)
+{
+	struct pll_div npll_config = {0};
+	u32 lcdc_div;
+	int ret;
+
+	ret = pll_para_config(rate_hz, &npll_config, &lcdc_div);
+	if (ret)
+		return ret;
+
+	rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK << NPLL_MODE_SHIFT,
+		     NPLL_MODE_SLOW << NPLL_MODE_SHIFT);
+	rkclk_set_pll(cru, CLK_NEW, &npll_config);
+
+	/* waiting for pll lock */
+	while (1) {
+		if (readl(&grf->soc_status[1]) & SOCSTS_NPLL_LOCK)
+			break;
+		udelay(1);
+	}
+
+	rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK << NPLL_MODE_SHIFT,
+		     NPLL_MODE_NORMAL << NPLL_MODE_SHIFT);
+
+	/* vop dclk source clk: npll,dclk_div: 1 */
+	switch (periph) {
+	case DCLK_VOP0:
+		rk_clrsetreg(&cru->cru_clksel_con[27], 0xff << 8 | 3 << 0,
+			     (lcdc_div - 1) << 8 | 2 << 0);
+		break;
+	case DCLK_VOP1:
+		rk_clrsetreg(&cru->cru_clksel_con[29], 0xff << 8 | 3 << 6,
+			     (lcdc_div - 1) << 8 | 2 << 6);
+		break;
+	}
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_SPL_BUILD
+static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf)
+{
+	u32 aclk_div;
+	u32 hclk_div;
+	u32 pclk_div;
+
+	/* pll enter slow-mode */
+	rk_clrsetreg(&cru->cru_mode_con,
+		     GPLL_MODE_MASK << GPLL_MODE_SHIFT |
+		     CPLL_MODE_MASK << CPLL_MODE_SHIFT,
+		     GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
+		     CPLL_MODE_SLOW << CPLL_MODE_SHIFT);
+
+	/* init pll */
+	rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
+	rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg);
+
+	/* waiting for pll lock */
+	while ((readl(&grf->soc_status[1]) &
+			(SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) !=
+			(SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK))
+		udelay(1);
+
+	/*
+	 * pd_bus clock pll source selection and
+	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
+	 */
+	aclk_div = GPLL_HZ / PD_BUS_ACLK_HZ - 1;
+	assert((aclk_div + 1) * PD_BUS_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
+	hclk_div = PD_BUS_ACLK_HZ / PD_BUS_HCLK_HZ - 1;
+	assert((hclk_div + 1) * PD_BUS_HCLK_HZ ==
+		PD_BUS_ACLK_HZ && (hclk_div < 0x4) && (hclk_div != 0x2));
+
+	pclk_div = PD_BUS_ACLK_HZ / PD_BUS_PCLK_HZ - 1;
+	assert((pclk_div + 1) * PD_BUS_PCLK_HZ ==
+		PD_BUS_ACLK_HZ && pclk_div < 0x7);
+
+	rk_clrsetreg(&cru->cru_clksel_con[1],
+		     PD_BUS_PCLK_DIV_MASK << PD_BUS_PCLK_DIV_SHIFT |
+		     PD_BUS_HCLK_DIV_MASK << PD_BUS_HCLK_DIV_SHIFT |
+		     PD_BUS_ACLK_DIV0_MASK << PD_BUS_ACLK_DIV0_SHIFT |
+		     PD_BUS_ACLK_DIV1_MASK << PD_BUS_ACLK_DIV1_SHIFT,
+		     pclk_div << PD_BUS_PCLK_DIV_SHIFT |
+		     hclk_div << PD_BUS_HCLK_DIV_SHIFT |
+		     aclk_div << PD_BUS_ACLK_DIV0_SHIFT |
+		     0 << 0);
+
+	/*
+	 * peri clock pll source selection and
+	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
+	 */
+	aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
+	assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
+
+	hclk_div = log2(PERI_ACLK_HZ / PERI_HCLK_HZ);
+	assert((1 << hclk_div) * PERI_HCLK_HZ ==
+		PERI_ACLK_HZ && (hclk_div < 0x4));
+
+	pclk_div = log2(PERI_ACLK_HZ / PERI_PCLK_HZ);
+	assert((1 << pclk_div) * PERI_PCLK_HZ ==
+		PERI_ACLK_HZ && (pclk_div < 0x4));
+
+	rk_clrsetreg(&cru->cru_clksel_con[10],
+		     PERI_PCLK_DIV_MASK << PERI_PCLK_DIV_SHIFT |
+		     PERI_HCLK_DIV_MASK << PERI_HCLK_DIV_SHIFT |
+		     PERI_ACLK_DIV_MASK << PERI_ACLK_DIV_SHIFT,
+		     PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT |
+		     pclk_div << PERI_PCLK_DIV_SHIFT |
+		     hclk_div << PERI_HCLK_DIV_SHIFT |
+		     aclk_div << PERI_ACLK_DIV_SHIFT);
+
+	/* PLL enter normal-mode */
+	rk_clrsetreg(&cru->cru_mode_con,
+		     GPLL_MODE_MASK << GPLL_MODE_SHIFT |
+		     CPLL_MODE_MASK << CPLL_MODE_SHIFT,
+		     GPLL_MODE_NORMAL << GPLL_MODE_SHIFT |
+		     CPLL_MODE_NORMAL << CPLL_MODE_SHIFT);
+}
+#endif
+
+void rkclk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf)
+{
+	/* pll enter slow-mode */
+	rk_clrsetreg(&cru->cru_mode_con,
+		     APLL_MODE_MASK << APLL_MODE_SHIFT,
+		     APLL_MODE_SLOW << APLL_MODE_SHIFT);
+
+	rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg);
+
+	/* waiting for pll lock */
+	while (!(readl(&grf->soc_status[1]) & SOCSTS_APLL_LOCK))
+		udelay(1);
+
+	/*
+	 * core clock pll source selection and
+	 * set up dependent divisors for MPAXI/M0AXI and ARM clocks.
+	 * core clock select apll, apll clk = 1800MHz
+	 * arm clk = 1800MHz, mpclk = 450MHz, m0clk = 900MHz
+	 */
+	rk_clrsetreg(&cru->cru_clksel_con[0],
+		     CORE_SEL_PLL_MASK << CORE_SEL_PLL_SHIFT |
+		     A17_DIV_MASK << A17_DIV_SHIFT |
+		     MP_DIV_MASK << MP_DIV_SHIFT |
+		     M0_DIV_MASK << M0_DIV_SHIFT,
+		     0 << A17_DIV_SHIFT |
+		     3 << MP_DIV_SHIFT |
+		     1 << M0_DIV_SHIFT);
+
+	/*
+	 * set up dependent divisors for L2RAM/ATCLK and PCLK clocks.
+	 * l2ramclk = 900MHz, atclk = 450MHz, pclk_dbg = 450MHz
+	 */
+	rk_clrsetreg(&cru->cru_clksel_con[37],
+		     CLK_L2RAM_DIV_MASK << CLK_L2RAM_DIV_SHIFT |
+		     ATCLK_CORE_DIV_CON_MASK << ATCLK_CORE_DIV_CON_SHIFT |
+		     PCLK_CORE_DBG_DIV_MASK >> PCLK_CORE_DBG_DIV_SHIFT,
+		     1 << CLK_L2RAM_DIV_SHIFT |
+		     3 << ATCLK_CORE_DIV_CON_SHIFT |
+		     3 << PCLK_CORE_DBG_DIV_SHIFT);
+
+	/* PLL enter normal-mode */
+	rk_clrsetreg(&cru->cru_mode_con,
+		     APLL_MODE_MASK << APLL_MODE_SHIFT,
+		     APLL_MODE_NORMAL << APLL_MODE_SHIFT);
+}
+
+/* Get pll rate by id */
+static uint32_t rkclk_pll_get_rate(struct rk3288_cru *cru,
+				   enum rk_clk_id clk_id)
+{
+	uint32_t nr, no, nf;
+	uint32_t con;
+	int pll_id = rk_pll_id(clk_id);
+	struct rk3288_pll *pll = &cru->pll[pll_id];
+	static u8 clk_shift[CLK_COUNT] = {
+		0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT,
+		GPLL_MODE_SHIFT, NPLL_MODE_SHIFT
+	};
+	uint shift;
+
+	con = readl(&cru->cru_mode_con);
+	shift = clk_shift[clk_id];
+	switch ((con >> shift) & APLL_MODE_MASK) {
+	case APLL_MODE_SLOW:
+		return OSC_HZ;
+	case APLL_MODE_NORMAL:
+		/* normal mode */
+		con = readl(&pll->con0);
+		no = ((con >> CLKOD_SHIFT) & CLKOD_MASK) + 1;
+		nr = ((con >> CLKR_SHIFT) & CLKR_MASK) + 1;
+		con = readl(&pll->con1);
+		nf = ((con >> CLKF_SHIFT) & CLKF_MASK) + 1;
+
+		return (24 * nf / (nr * no)) * 1000000;
+	case APLL_MODE_DEEP:
+	default:
+		return 32768;
+	}
+}
+
+static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint gclk_rate,
+				  int periph)
+{
+	uint src_rate;
+	uint div, mux;
+	u32 con;
+
+	switch (periph) {
+	case HCLK_EMMC:
+		con = readl(&cru->cru_clksel_con[12]);
+		mux = (con >> EMMC_PLL_SHIFT) & EMMC_PLL_MASK;
+		div = (con >> EMMC_DIV_SHIFT) & EMMC_DIV_MASK;
+		break;
+	case HCLK_SDMMC:
+		con = readl(&cru->cru_clksel_con[11]);
+		mux = (con >> MMC0_PLL_SHIFT) & MMC0_PLL_MASK;
+		div = (con >> MMC0_DIV_SHIFT) & MMC0_DIV_MASK;
+		break;
+	case HCLK_SDIO0:
+		con = readl(&cru->cru_clksel_con[12]);
+		mux = (con >> SDIO0_PLL_SHIFT) & SDIO0_PLL_MASK;
+		div = (con >> SDIO0_DIV_SHIFT) & SDIO0_DIV_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : gclk_rate;
+	return DIV_TO_RATE(src_rate, div);
+}
+
+static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint gclk_rate,
+				  int  periph, uint freq)
+{
+	int src_clk_div;
+	int mux;
+
+	debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
+	src_clk_div = RATE_TO_DIV(gclk_rate, freq);
+
+	if (src_clk_div > 0x3f) {
+		src_clk_div = RATE_TO_DIV(OSC_HZ, freq);
+		mux = EMMC_PLL_SELECT_24MHZ;
+		assert((int)EMMC_PLL_SELECT_24MHZ ==
+		       (int)MMC0_PLL_SELECT_24MHZ);
+	} else {
+		mux = EMMC_PLL_SELECT_GENERAL;
+		assert((int)EMMC_PLL_SELECT_GENERAL ==
+		       (int)MMC0_PLL_SELECT_GENERAL);
+	}
+	switch (periph) {
+	case HCLK_EMMC:
+		rk_clrsetreg(&cru->cru_clksel_con[12],
+			     EMMC_PLL_MASK << EMMC_PLL_SHIFT |
+			     EMMC_DIV_MASK << EMMC_DIV_SHIFT,
+			     mux << EMMC_PLL_SHIFT |
+			     (src_clk_div - 1) << EMMC_DIV_SHIFT);
+		break;
+	case HCLK_SDMMC:
+		rk_clrsetreg(&cru->cru_clksel_con[11],
+			     MMC0_PLL_MASK << MMC0_PLL_SHIFT |
+			     MMC0_DIV_MASK << MMC0_DIV_SHIFT,
+			     mux << MMC0_PLL_SHIFT |
+			     (src_clk_div - 1) << MMC0_DIV_SHIFT);
+		break;
+	case HCLK_SDIO0:
+		rk_clrsetreg(&cru->cru_clksel_con[12],
+			     SDIO0_PLL_MASK << SDIO0_PLL_SHIFT |
+			     SDIO0_DIV_MASK << SDIO0_DIV_SHIFT,
+			     mux << SDIO0_PLL_SHIFT |
+			     (src_clk_div - 1) << SDIO0_DIV_SHIFT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return rockchip_mmc_get_clk(cru, gclk_rate, periph);
+}
+
+static ulong rockchip_spi_get_clk(struct rk3288_cru *cru, uint gclk_rate,
+				  int periph)
+{
+	uint div, mux;
+	u32 con;
+
+	switch (periph) {
+	case SCLK_SPI0:
+		con = readl(&cru->cru_clksel_con[25]);
+		mux = (con >> SPI0_PLL_SHIFT) & SPI0_PLL_MASK;
+		div = (con >> SPI0_DIV_SHIFT) & SPI0_DIV_MASK;
+		break;
+	case SCLK_SPI1:
+		con = readl(&cru->cru_clksel_con[25]);
+		mux = (con >> SPI1_PLL_SHIFT) & SPI1_PLL_MASK;
+		div = (con >> SPI1_DIV_SHIFT) & SPI1_DIV_MASK;
+		break;
+	case SCLK_SPI2:
+		con = readl(&cru->cru_clksel_con[39]);
+		mux = (con >> SPI2_PLL_SHIFT) & SPI2_PLL_MASK;
+		div = (con >> SPI2_DIV_SHIFT) & SPI2_DIV_MASK;
+		break;
+	default:
+		return -EINVAL;
+	}
+	assert(mux == SPI0_PLL_SELECT_GENERAL);
+
+	return DIV_TO_RATE(gclk_rate, div);
+}
+
+static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint gclk_rate,
+				  int periph, uint freq)
+{
+	int src_clk_div;
+
+	debug("%s: clk_general_rate=%u\n", __func__, gclk_rate);
+	src_clk_div = RATE_TO_DIV(gclk_rate, freq);
+	switch (periph) {
+	case SCLK_SPI0:
+		rk_clrsetreg(&cru->cru_clksel_con[25],
+			     SPI0_PLL_MASK << SPI0_PLL_SHIFT |
+			     SPI0_DIV_MASK << SPI0_DIV_SHIFT,
+			     SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT |
+			     src_clk_div << SPI0_DIV_SHIFT);
+		break;
+	case SCLK_SPI1:
+		rk_clrsetreg(&cru->cru_clksel_con[25],
+			     SPI1_PLL_MASK << SPI1_PLL_SHIFT |
+			     SPI1_DIV_MASK << SPI1_DIV_SHIFT,
+			     SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT |
+			     src_clk_div << SPI1_DIV_SHIFT);
+		break;
+	case SCLK_SPI2:
+		rk_clrsetreg(&cru->cru_clksel_con[39],
+			     SPI2_PLL_MASK << SPI2_PLL_SHIFT |
+			     SPI2_DIV_MASK << SPI2_DIV_SHIFT,
+			     SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT |
+			     src_clk_div << SPI2_DIV_SHIFT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return rockchip_spi_get_clk(cru, gclk_rate, periph);
+}
+
+static ulong rk3288_clk_get_rate(struct clk *clk)
+{
+	struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong new_rate, gclk_rate;
+
+	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
+	switch (clk->id) {
+	case 0 ... 63:
+		new_rate = rkclk_pll_get_rate(priv->cru, clk->id);
+		break;
+	case HCLK_EMMC:
+	case HCLK_SDMMC:
+	case HCLK_SDIO0:
+		new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id);
+		break;
+	case SCLK_SPI0:
+	case SCLK_SPI1:
+	case SCLK_SPI2:
+		new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id);
+		break;
+	case PCLK_I2C0:
+	case PCLK_I2C1:
+	case PCLK_I2C2:
+	case PCLK_I2C3:
+	case PCLK_I2C4:
+	case PCLK_I2C5:
+		return gclk_rate;
+	default:
+		return -ENOENT;
+	}
+
+	return new_rate;
+}
+
+static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct rk3288_clk_priv *priv = dev_get_priv(clk->dev);
+	struct rk3288_cru *cru = priv->cru;
+	ulong new_rate, gclk_rate;
+
+	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
+	switch (clk->id) {
+	case CLK_DDR:
+		new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate);
+		break;
+	case HCLK_EMMC:
+	case HCLK_SDMMC:
+	case HCLK_SDIO0:
+		new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate);
+		break;
+	case SCLK_SPI0:
+	case SCLK_SPI1:
+	case SCLK_SPI2:
+		new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate);
+		break;
+#ifndef CONFIG_SPL_BUILD
+	case SCLK_MAC:
+		new_rate = rockchip_mac_set_clk(priv->cru, clk->id, rate);
+		break;
+	case DCLK_VOP0:
+	case DCLK_VOP1:
+		new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate);
+		break;
+	case SCLK_EDP_24M:
+		/* clk_edp_24M source: 24M */
+		rk_setreg(&cru->cru_clksel_con[28], 1 << 15);
+
+		/* rst edp */
+		rk_setreg(&cru->cru_clksel_con[6], 1 << 15);
+		udelay(1);
+		rk_clrreg(&cru->cru_clksel_con[6], 1 << 15);
+		new_rate = rate;
+		break;
+	case ACLK_VOP0:
+	case ACLK_VOP1: {
+		u32 div;
+
+		/* vop aclk source clk: cpll */
+		div = CPLL_HZ / rate;
+		assert((div - 1 < 64) && (div * rate == CPLL_HZ));
+
+		switch (clk->id) {
+		case ACLK_VOP0:
+			rk_clrsetreg(&cru->cru_clksel_con[31],
+				     3 << 6 | 0x1f << 0,
+				     0 << 6 | (div - 1) << 0);
+			break;
+		case ACLK_VOP1:
+			rk_clrsetreg(&cru->cru_clksel_con[31],
+				     3 << 14 | 0x1f << 8,
+				     0 << 14 | (div - 1) << 8);
+			break;
+		}
+		new_rate = rate;
+		break;
+	}
+	case PCLK_HDMI_CTRL:
+		/* enable pclk hdmi ctrl */
+		rk_clrreg(&cru->cru_clkgate_con[16], 1 << 9);
+
+		/* software reset hdmi */
+		rk_setreg(&cru->cru_clkgate_con[7], 1 << 9);
+		udelay(1);
+		rk_clrreg(&cru->cru_clkgate_con[7], 1 << 9);
+		new_rate = rate;
+		break;
+#endif
+	default:
+		return -ENOENT;
+	}
+
+	return new_rate;
+}
+
+static struct clk_ops rk3288_clk_ops = {
+	.get_rate	= rk3288_clk_get_rate,
+	.set_rate	= rk3288_clk_set_rate,
+};
+
+static int rk3288_clk_probe(struct udevice *dev)
+{
+	struct rk3288_clk_priv *priv = dev_get_priv(dev);
+
+	priv->cru = (struct rk3288_cru *)dev_get_addr(dev);
+	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+#ifdef CONFIG_SPL_BUILD
+	rkclk_init(priv->cru, priv->grf);
+#endif
+
+	return 0;
+}
+
+static int rk3288_clk_bind(struct udevice *dev)
+{
+	int ret;
+
+	/* The reset driver does not have a device node, so bind it here */
+	ret = device_bind_driver(gd->dm_root, "rk3288_sysreset", "reset", &dev);
+	if (ret)
+		debug("Warning: No RK3288 reset driver: ret=%d\n", ret);
+
+	return 0;
+}
+
+static const struct udevice_id rk3288_clk_ids[] = {
+	{ .compatible = "rockchip,rk3288-cru" },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_rk3288) = {
+	.name		= "clk_rk3288",
+	.id		= UCLASS_CLK,
+	.of_match	= rk3288_clk_ids,
+	.priv_auto_alloc_size = sizeof(struct rk3288_clk_priv),
+	.ops		= &rk3288_clk_ops,
+	.bind		= rk3288_clk_bind,
+	.probe		= rk3288_clk_probe,
+};

u-boot/drivers/clk/clk_sandbox.c

@@ -0,0 +1,107 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/clk.h>
+
+struct sandbox_clk_priv {
+	ulong rate[SANDBOX_CLK_ID_COUNT];
+	bool enabled[SANDBOX_CLK_ID_COUNT];
+};
+
+static ulong sandbox_clk_get_rate(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->rate[clk->id];
+}
+
+static ulong sandbox_clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+	ulong old_rate;
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	if (!rate)
+		return -EINVAL;
+
+	old_rate = priv->rate[clk->id];
+	priv->rate[clk->id] = rate;
+
+	return old_rate;
+}
+
+static int sandbox_clk_enable(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	priv->enabled[clk->id] = true;
+
+	return 0;
+}
+
+static int sandbox_clk_disable(struct clk *clk)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
+
+	if (clk->id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	priv->enabled[clk->id] = false;
+
+	return 0;
+}
+
+static struct clk_ops sandbox_clk_ops = {
+	.get_rate	= sandbox_clk_get_rate,
+	.set_rate	= sandbox_clk_set_rate,
+	.enable		= sandbox_clk_enable,
+	.disable	= sandbox_clk_disable,
+};
+
+static const struct udevice_id sandbox_clk_ids[] = {
+	{ .compatible = "sandbox,clk" },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sandbox) = {
+	.name		= "clk_sandbox",
+	.id		= UCLASS_CLK,
+	.of_match	= sandbox_clk_ids,
+	.ops		= &sandbox_clk_ops,
+	.priv_auto_alloc_size = sizeof(struct sandbox_clk_priv),
+};
+
+ulong sandbox_clk_query_rate(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->rate[id];
+}
+
+int sandbox_clk_query_enable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_priv *priv = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
+		return -EINVAL;
+
+	return priv->enabled[id];
+}

u-boot/drivers/clk/clk_sandbox_test.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <clk.h>
+#include <asm/clk.h>
+
+struct sandbox_clk_test {
+	struct clk clks[SANDBOX_CLK_TEST_ID_COUNT];
+};
+
+static const char * const sandbox_clk_test_names[] = {
+	[SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
+	[SANDBOX_CLK_TEST_ID_SPI] = "spi",
+	[SANDBOX_CLK_TEST_ID_I2C] = "i2c",
+};
+
+int sandbox_clk_test_get(struct udevice *dev)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+	int i, ret;
+
+	for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
+		ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
+				      &sbct->clks[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_get_rate(&sbct->clks[id]);
+}
+
+ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_set_rate(&sbct->clks[id], rate);
+}
+
+int sandbox_clk_test_enable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_enable(&sbct->clks[id]);
+}
+
+int sandbox_clk_test_disable(struct udevice *dev, int id)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+
+	if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
+		return -EINVAL;
+
+	return clk_disable(&sbct->clks[id]);
+}
+
+int sandbox_clk_test_free(struct udevice *dev)
+{
+	struct sandbox_clk_test *sbct = dev_get_priv(dev);
+	int i, ret;
+
+	for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
+		ret = clk_free(&sbct->clks[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct udevice_id sandbox_clk_test_ids[] = {
+	{ .compatible = "sandbox,clk-test" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_clk_test) = {
+	.name = "sandbox_clk_test",
+	.id = UCLASS_MISC,
+	.of_match = sandbox_clk_test_ids,
+	.priv_auto_alloc_size = sizeof(struct sandbox_clk_test),
+};

u-boot/drivers/clk/exynos/Kconfig

@@ -0,0 +1,18 @@
+config CLK_EXYNOS
+	bool
+	select CLK
+	help
+	  This enables support for common clock driver API on Samsung
+	  Exynos SoCs.
+
+menu "Clock drivers for Exynos SoCs"
+	depends on CLK_EXYNOS
+
+config CLK_EXYNOS7420
+	bool "Clock driver for Samsung's Exynos7420 SoC"
+	default y
+	help
+	  This enables common clock driver support for platforms based
+	  on Samsung Exynos7420 SoC.
+
+endmenu

u-boot/drivers/clk/exynos/Makefile

@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2016 Samsung Electronics
+# Thomas Abraham <thomas.ab@samsung.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y				+= clk-pll.o
+obj-$(CONFIG_CLK_EXYNOS7420)	+= clk-exynos7420.o

u-boot/drivers/clk/exynos/clk-exynos7420.c

@@ -0,0 +1,236 @@
+/*
+ * Samsung Exynos7420 clock driver.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <clk-uclass.h>
+#include <asm/io.h>
+#include <dt-bindings/clock/exynos7420-clk.h>
+#include "clk-pll.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define DIVIDER(reg, shift, mask)	\
+	(((readl(reg) >> shift) & mask) + 1)
+
+/* CMU TOPC block device structure */
+struct exynos7420_clk_cmu_topc {
+	unsigned int	rsvd1[68];
+	unsigned int	bus0_pll_con[2];
+	unsigned int	rsvd2[2];
+	unsigned int	bus1_pll_con[2];
+	unsigned int	rsvd3[54];
+	unsigned int	mux_sel[6];
+	unsigned int	rsvd4[250];
+	unsigned int	div[4];
+};
+
+/* CMU TOP0 block device structure */
+struct exynos7420_clk_cmu_top0 {
+	unsigned int	rsvd0[128];
+	unsigned int	mux_sel[7];
+	unsigned int	rsvd1[261];
+	unsigned int	div_peric[5];
+};
+
+/**
+ * struct exynos7420_clk_topc_priv - private data for CMU topc clock driver.
+ *
+ * @topc: base address of the memory mapped CMU TOPC controller.
+ * @fin_freq: frequency of the Oscillator clock.
+ * @sclk_bus0_pll_a: frequency of sclk_bus0_pll_a clock.
+ * @sclk_bus1_pll_a: frequency of sclk_bus1_pll_a clock.
+ */
+struct exynos7420_clk_topc_priv {
+	struct exynos7420_clk_cmu_topc *topc;
+	unsigned long fin_freq;
+	unsigned long sclk_bus0_pll_a;
+	unsigned long sclk_bus1_pll_a;
+};
+
+/**
+ * struct exynos7420_clk_top0_priv - private data for CMU top0 clock driver.
+ *
+ * @top0: base address of the memory mapped CMU TOP0 controller.
+ * @mout_top0_bus0_pll_half: frequency of mout_top0_bus0_pll_half clock
+ * @sclk_uart2: frequency of sclk_uart2 clock.
+ */
+struct exynos7420_clk_top0_priv {
+	struct exynos7420_clk_cmu_top0 *top0;
+	unsigned long mout_top0_bus0_pll_half;
+	unsigned long sclk_uart2;
+};
+
+static ulong exynos7420_topc_get_rate(struct clk *clk)
+{
+	struct exynos7420_clk_topc_priv *priv = dev_get_priv(clk->dev);
+
+	switch (clk->id) {
+	case DOUT_SCLK_BUS0_PLL:
+	case SCLK_BUS0_PLL_A:
+	case SCLK_BUS0_PLL_B:
+		return priv->sclk_bus0_pll_a;
+	case DOUT_SCLK_BUS1_PLL:
+	case SCLK_BUS1_PLL_A:
+	case SCLK_BUS1_PLL_B:
+		return priv->sclk_bus1_pll_a;
+	default:
+		return 0;
+	}
+}
+
+static struct clk_ops exynos7420_clk_topc_ops = {
+	.get_rate	= exynos7420_topc_get_rate,
+};
+
+static int exynos7420_clk_topc_probe(struct udevice *dev)
+{
+	struct exynos7420_clk_topc_priv *priv = dev_get_priv(dev);
+	struct exynos7420_clk_cmu_topc *topc;
+	struct clk in_clk;
+	unsigned long rate;
+	fdt_addr_t base;
+	int ret;
+
+	base = dev_get_addr(dev);
+	if (base == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	topc = (struct exynos7420_clk_cmu_topc *)base;
+	priv->topc = topc;
+
+	ret = clk_get_by_index(dev, 0, &in_clk);
+	if (ret >= 0)
+		priv->fin_freq = clk_get_rate(&in_clk);
+
+	rate = pll145x_get_rate(&topc->bus0_pll_con[0], priv->fin_freq);
+	if (readl(&topc->mux_sel[1]) & (1 << 16))
+		rate >>= 1;
+	rate /= DIVIDER(&topc->div[3], 0, 0xf);
+	priv->sclk_bus0_pll_a = rate;
+
+	rate = pll145x_get_rate(&topc->bus1_pll_con[0], priv->fin_freq) /
+			DIVIDER(&topc->div[3], 8, 0xf);
+	priv->sclk_bus1_pll_a = rate;
+
+	return 0;
+}
+
+static ulong exynos7420_top0_get_rate(struct clk *clk)
+{
+	struct exynos7420_clk_top0_priv *priv = dev_get_priv(clk->dev);
+	struct exynos7420_clk_cmu_top0 *top0 = priv->top0;
+
+	switch (clk->id) {
+	case CLK_SCLK_UART2:
+		return priv->mout_top0_bus0_pll_half /
+			DIVIDER(&top0->div_peric[3], 8, 0xf);
+	default:
+		return 0;
+	}
+}
+
+static struct clk_ops exynos7420_clk_top0_ops = {
+	.get_rate	= exynos7420_top0_get_rate,
+};
+
+static int exynos7420_clk_top0_probe(struct udevice *dev)
+{
+	struct exynos7420_clk_top0_priv *priv;
+	struct exynos7420_clk_cmu_top0 *top0;
+	struct clk in_clk;
+	fdt_addr_t base;
+	int ret;
+
+	priv = dev_get_priv(dev);
+	if (!priv)
+		return -EINVAL;
+
+	base = dev_get_addr(dev);
+	if (base == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	top0 = (struct exynos7420_clk_cmu_top0 *)base;
+	priv->top0 = top0;
+
+	ret = clk_get_by_index(dev, 1, &in_clk);
+	if (ret >= 0) {
+		priv->mout_top0_bus0_pll_half =
+			clk_get_rate(&in_clk);
+		if (readl(&top0->mux_sel[1]) & (1 << 16))
+			priv->mout_top0_bus0_pll_half >>= 1;
+	}
+
+	return 0;
+}
+
+static ulong exynos7420_peric1_get_rate(struct clk *clk)
+{
+	struct clk in_clk;
+	unsigned int ret;
+	unsigned long freq = 0;
+
+	switch (clk->id) {
+	case SCLK_UART2:
+		ret = clk_get_by_index(clk->dev, 3, &in_clk);
+		if (ret < 0)
+			return ret;
+		freq = clk_get_rate(&in_clk);
+		break;
+	}
+
+	return freq;
+}
+
+static struct clk_ops exynos7420_clk_peric1_ops = {
+	.get_rate	= exynos7420_peric1_get_rate,
+};
+
+static const struct udevice_id exynos7420_clk_topc_compat[] = {
+	{ .compatible = "samsung,exynos7-clock-topc" },
+	{ }
+};
+
+U_BOOT_DRIVER(exynos7420_clk_topc) = {
+	.name = "exynos7420-clock-topc",
+	.id = UCLASS_CLK,
+	.of_match = exynos7420_clk_topc_compat,
+	.probe = exynos7420_clk_topc_probe,
+	.priv_auto_alloc_size = sizeof(struct exynos7420_clk_topc_priv),
+	.ops = &exynos7420_clk_topc_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+static const struct udevice_id exynos7420_clk_top0_compat[] = {
+	{ .compatible = "samsung,exynos7-clock-top0" },
+	{ }
+};
+
+U_BOOT_DRIVER(exynos7420_clk_top0) = {
+	.name = "exynos7420-clock-top0",
+	.id = UCLASS_CLK,
+	.of_match = exynos7420_clk_top0_compat,
+	.probe = exynos7420_clk_top0_probe,
+	.priv_auto_alloc_size = sizeof(struct exynos7420_clk_top0_priv),
+	.ops = &exynos7420_clk_top0_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
+
+static const struct udevice_id exynos7420_clk_peric1_compat[] = {
+	{ .compatible = "samsung,exynos7-clock-peric1" },
+	{ }
+};
+
+U_BOOT_DRIVER(exynos7420_clk_peric1) = {
+	.name = "exynos7420-clock-peric1",
+	.id = UCLASS_CLK,
+	.of_match = exynos7420_clk_peric1_compat,
+	.ops = &exynos7420_clk_peric1_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};

u-boot/drivers/clk/exynos/clk-pll.c

@@ -0,0 +1,33 @@
+/*
+ * Exynos PLL helper functions for clock drivers.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <div64.h>
+
+#define PLL145X_MDIV_SHIFT	16
+#define PLL145X_MDIV_MASK	0x3ff
+#define PLL145X_PDIV_SHIFT	8
+#define PLL145X_PDIV_MASK	0x3f
+#define PLL145X_SDIV_SHIFT	0
+#define PLL145X_SDIV_MASK	0x7
+
+unsigned long pll145x_get_rate(unsigned int *con1, unsigned long fin_freq)
+{
+	unsigned long pll_con1 = readl(con1);
+	unsigned long mdiv, sdiv, pdiv;
+	uint64_t fvco = fin_freq;
+
+	mdiv = (pll_con1 >> PLL145X_MDIV_SHIFT) & PLL145X_MDIV_MASK;
+	pdiv = (pll_con1 >> PLL145X_PDIV_SHIFT) & PLL145X_PDIV_MASK;
+	sdiv = (pll_con1 >> PLL145X_SDIV_SHIFT) & PLL145X_SDIV_MASK;
+
+	fvco *= mdiv;
+	do_div(fvco, (pdiv << sdiv));
+	return (unsigned long)fvco;
+}

u-boot/drivers/clk/exynos/clk-pll.h

@@ -0,0 +1,9 @@
+/*
+ * Exynos PLL helper functions for clock drivers.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+unsigned long pll145x_get_rate(unsigned int *con1, unsigned long fin_freq);

u-boot/drivers/clk/uniphier/Kconfig

@@ -0,0 +1,13 @@
+config CLK_UNIPHIER
+	bool
+	select CLK
+	select SPL_CLK
+
+menu "Clock drivers for UniPhier SoCs"
+	depends on CLK_UNIPHIER
+
+config CLK_UNIPHIER_MIO
+	bool "Clock driver for UniPhier Media I/O block"
+	default y
+
+endmenu

u-boot/drivers/clk/uniphier/Makefile

@@ -0,0 +1,3 @@
+obj-y					+= clk-uniphier-core.o
+
+obj-$(CONFIG_CLK_UNIPHIER_MIO)		+= clk-uniphier-mio.o

u-boot/drivers/clk/uniphier/clk-uniphier-core.c

@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+#include <clk-uclass.h>
+#include <dm/device.h>
+
+#include "clk-uniphier.h"
+
+static int uniphier_clk_enable(struct clk *clk)
+{
+	struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
+	struct uniphier_clk_gate_data *gate = priv->socdata->gate;
+	unsigned int nr_gate = priv->socdata->nr_gate;
+	void __iomem *reg;
+	u32 mask, data, tmp;
+	int i;
+
+	for (i = 0; i < nr_gate; i++) {
+		if (gate[i].index != clk->id)
+			continue;
+
+		reg = priv->base + gate[i].reg;
+		mask = gate[i].mask;
+		data = gate[i].data & mask;
+
+		tmp = readl(reg);
+		tmp &= ~mask;
+		tmp |= data & mask;
+		debug("%s: %p: %08x\n", __func__, reg, tmp);
+		writel(tmp, reg);
+	}
+
+	return 0;
+}
+
+static ulong uniphier_clk_get_rate(struct clk *clk)
+{
+	struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
+	struct uniphier_clk_rate_data *rdata = priv->socdata->rate;
+	unsigned int nr_rdata = priv->socdata->nr_rate;
+	void __iomem *reg;
+	u32 mask, data;
+	ulong matched_rate = 0;
+	int i;
+
+	for (i = 0; i < nr_rdata; i++) {
+		if (rdata[i].index != clk->id)
+			continue;
+
+		if (rdata[i].reg == UNIPHIER_CLK_RATE_IS_FIXED)
+			return rdata[i].rate;
+
+		reg = priv->base + rdata[i].reg;
+		mask = rdata[i].mask;
+		data = rdata[i].data & mask;
+		if ((readl(reg) & mask) == data) {
+			if (matched_rate && rdata[i].rate != matched_rate) {
+				printf("failed to get clk rate for insane register values\n");
+				return -EINVAL;
+			}
+			matched_rate = rdata[i].rate;
+		}
+	}
+
+	debug("%s: rate = %lu\n", __func__, matched_rate);
+
+	return matched_rate;
+}
+
+static ulong uniphier_clk_set_rate(struct clk *clk, ulong rate)
+{
+	struct uniphier_clk_priv *priv = dev_get_priv(clk->dev);
+	struct uniphier_clk_rate_data *rdata = priv->socdata->rate;
+	unsigned int nr_rdata = priv->socdata->nr_rate;
+	void __iomem *reg;
+	u32 mask, data, tmp;
+	ulong best_rate = 0;
+	int i;
+
+	/* first, decide the best match rate */
+	for (i = 0; i < nr_rdata; i++) {
+		if (rdata[i].index != clk->id)
+			continue;
+
+		if (rdata[i].reg == UNIPHIER_CLK_RATE_IS_FIXED)
+			return 0;
+
+		if (rdata[i].rate > best_rate && rdata[i].rate <= rate)
+			best_rate = rdata[i].rate;
+	}
+
+	if (!best_rate)
+		return -ENODEV;
+
+	debug("%s: requested rate = %lu, set rate = %lu\n", __func__,
+	      rate, best_rate);
+
+	/* second, really set registers */
+	for (i = 0; i < nr_rdata; i++) {
+		if (rdata[i].index != clk->id || rdata[i].rate != best_rate)
+			continue;
+
+		reg = priv->base + rdata[i].reg;
+		mask = rdata[i].mask;
+		data = rdata[i].data & mask;
+
+		tmp = readl(reg);
+		tmp &= ~mask;
+		tmp |= data;
+		debug("%s: %p: %08x\n", __func__, reg, tmp);
+		writel(tmp, reg);
+	}
+
+	return best_rate;
+}
+
+const struct clk_ops uniphier_clk_ops = {
+	.enable = uniphier_clk_enable,
+	.get_rate = uniphier_clk_get_rate,
+	.set_rate = uniphier_clk_set_rate,
+};
+
+int uniphier_clk_probe(struct udevice *dev)
+{
+	struct uniphier_clk_priv *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
+
+	addr = dev_get_addr(dev);
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	priv->base = map_sysmem(addr, SZ_4K);
+	if (!priv->base)
+		return -ENOMEM;
+
+	priv->socdata = (void *)dev_get_driver_data(dev);
+
+	return 0;
+}
+
+int uniphier_clk_remove(struct udevice *dev)
+{
+	struct uniphier_clk_priv *priv = dev_get_priv(dev);
+
+	unmap_sysmem(priv->base);
+
+	return 0;
+}

u-boot/drivers/clk/uniphier/clk-uniphier-mio.c

@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <dm/device.h>
+
+#include "clk-uniphier.h"
+
+#define UNIPHIER_MIO_CLK_GATE_SD(ch, idx)	\
+	{					\
+		.index = (idx),			\
+		.reg = 0x20 + 0x200 * (ch),	\
+		.mask = 0x00000100,		\
+		.data = 0x00000100,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x110 + 0x200 * (ch),	\
+		.mask = 0x00000001,		\
+		.data = 0x00000001,		\
+	}
+
+#define UNIPHIER_MIO_CLK_RATE_SD(ch, idx)	\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00000000,		\
+		.rate = 44444444,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00010000,		\
+		.rate = 33333333,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00020000,		\
+		.rate = 50000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00020000,		\
+		.rate = 66666666,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00001000,		\
+		.rate = 100000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00001100,		\
+		.rate = 40000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00001200,		\
+		.rate = 25000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x30 + 0x200 * (ch),	\
+		.mask = 0x00031300,		\
+		.data = 0x00001300,		\
+		.rate = 22222222,		\
+	}
+
+#define UNIPHIER_MIO_CLK_GATE_USB(ch, idx)	\
+	{					\
+		.index = (idx),			\
+		.reg = 0x20 + 0x200 * (ch),	\
+		.mask = 0x30000000,		\
+		.data = 0x30000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x110 + 0x200 * (ch),	\
+		.mask = 0x01000000,		\
+		.data = 0x01000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x114 + 0x200 * (ch),	\
+		.mask = 0x00000001,		\
+		.data = 0x00000001,		\
+	}
+
+#define UNIPHIER_MIO_CLK_GATE_DMAC(idx)		\
+	{					\
+		.index = (idx),			\
+		.reg = 0x20,			\
+		.mask = 0x02000000,		\
+		.data = 0x02000000,		\
+	},					\
+	{					\
+		.index = (idx),			\
+		.reg = 0x110,			\
+		.mask = 0x00020000,		\
+		.data = 0x00020000,		\
+	}
+
+static struct uniphier_clk_gate_data uniphier_mio_clk_gate[] = {
+	UNIPHIER_MIO_CLK_GATE_SD(0, 0),
+	UNIPHIER_MIO_CLK_GATE_SD(1, 1),
+	UNIPHIER_MIO_CLK_GATE_SD(2, 2),		/* for PH1-Pro4 only */
+	UNIPHIER_MIO_CLK_GATE_USB(0, 3),
+	UNIPHIER_MIO_CLK_GATE_USB(1, 4),
+	UNIPHIER_MIO_CLK_GATE_USB(2, 5),
+	UNIPHIER_MIO_CLK_GATE_DMAC(6),
+	UNIPHIER_MIO_CLK_GATE_USB(3, 7),	/* for PH1-sLD3 only */
+};
+
+static struct uniphier_clk_rate_data uniphier_mio_clk_rate[] = {
+	UNIPHIER_MIO_CLK_RATE_SD(0, 0),
+	UNIPHIER_MIO_CLK_RATE_SD(1, 1),
+	UNIPHIER_MIO_CLK_RATE_SD(2, 2),		/* for PH1-Pro4 only */
+};
+
+static struct uniphier_clk_soc_data uniphier_mio_clk_data = {
+	.gate = uniphier_mio_clk_gate,
+	.nr_gate = ARRAY_SIZE(uniphier_mio_clk_gate),
+	.rate = uniphier_mio_clk_rate,
+	.nr_rate = ARRAY_SIZE(uniphier_mio_clk_rate),
+};
+
+static const struct udevice_id uniphier_mio_clk_match[] = {
+	{
+		.compatible = "socionext,ph1-sld3-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,ph1-ld4-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,ph1-pro4-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,ph1-sld8-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,ph1-pro5-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,proxstream2-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,ph1-ld11-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{
+		.compatible = "socionext,ph1-ld20-mioctrl",
+		.data = (ulong)&uniphier_mio_clk_data,
+	},
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(uniphier_mio_clk) = {
+	.name = "uniphier-mio-clk",
+	.id = UCLASS_CLK,
+	.of_match = uniphier_mio_clk_match,
+	.probe = uniphier_clk_probe,
+	.remove = uniphier_clk_remove,
+	.priv_auto_alloc_size = sizeof(struct uniphier_clk_priv),
+	.ops = &uniphier_clk_ops,
+};

u-boot/drivers/clk/uniphier/clk-uniphier.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CLK_UNIPHIER_H__
+#define __CLK_UNIPHIER_H__
+
+#include <linux/kernel.h>
+
+struct uniphier_clk_gate_data {
+	int index;
+	unsigned int reg;
+	u32 mask;
+	u32 data;
+};
+
+struct uniphier_clk_rate_data {
+	int index;
+	unsigned int reg;
+#define UNIPHIER_CLK_RATE_IS_FIXED		UINT_MAX
+	u32 mask;
+	u32 data;
+	unsigned long rate;
+};
+
+struct uniphier_clk_soc_data {
+	struct uniphier_clk_gate_data *gate;
+	unsigned int nr_gate;
+	struct uniphier_clk_rate_data *rate;
+	unsigned int nr_rate;
+};
+
+#define UNIPHIER_CLK_FIXED_RATE(i, f)			\
+	{						\
+		.index = i,				\
+		.reg = UNIPHIER_CLK_RATE_IS_FIXED,	\
+		.rate = f,				\
+	}
+
+/**
+ * struct uniphier_clk_priv - private data for UniPhier clock driver
+ *
+ * @base: base address of the clock provider
+ * @socdata: SoC specific data
+ */
+struct uniphier_clk_priv {
+	void __iomem *base;
+	struct uniphier_clk_soc_data *socdata;
+};
+
+extern const struct clk_ops uniphier_clk_ops;
+int uniphier_clk_probe(struct udevice *dev);
+int uniphier_clk_remove(struct udevice *dev);
+
+#endif /* __CLK_UNIPHIER_H__ */