clk: zx: add clock support to zx296702

It adds a clock driver for zx296702 SoC to register the clock tree to
Common Clock Framework.  All the clocks of bus topology and some the
peripheral clocks are ready with this commit. Some missing leaf clocks
for peripherals will be added later when needed.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>

5 files changed, 864 insertions, 0 deletions

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 3d00c25382c5..f4c68beafe0a 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -72,4 +72,5 @@ obj-$(CONFIG_ARCH_OMAP2PLUS)		+= ti/
 obj-$(CONFIG_ARCH_U8500)		+= ux500/
 obj-$(CONFIG_COMMON_CLK_VERSATILE)	+= versatile/
 obj-$(CONFIG_X86)			+= x86/
+obj-$(CONFIG_ARCH_ZX)			+= zte/
 obj-$(CONFIG_ARCH_ZYNQ)			+= zynq/
diff --git a/drivers/clk/zte/Makefile b/drivers/clk/zte/Makefile
new file mode 100644
index 000000000000..95b707c18108
--- /dev/null
+++ b/drivers/clk/zte/Makefile
@@ -0,0 +1,2 @@
+obj-y := clk-pll.o
+obj-$(CONFIG_SOC_ZX296702) += clk-zx296702.o
diff --git a/drivers/clk/zte/clk-pll.c b/drivers/clk/zte/clk-pll.c
new file mode 100644
index 000000000000..c3b221ae6cd7
--- /dev/null
+++ b/drivers/clk/zte/clk-pll.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright 2014 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "clk.h"
+
+#define to_clk_zx_pll(_hw) container_of(_hw, struct clk_zx_pll, hw)
+
+#define CFG0_CFG1_OFFSET 4
+#define LOCK_FLAG BIT(30)
+#define POWER_DOWN BIT(31)
+
+static int rate_to_idx(struct clk_zx_pll *zx_pll, unsigned long rate)
+{
+	const struct zx_pll_config *config = zx_pll->lookup_table;
+	int i;
+
+	for (i = 0; i < zx_pll->count; i++) {
+		if (config[i].rate > rate)
+			return i > 0 ? i - 1 : 0;
+
+		if (config[i].rate == rate)
+			return i;
+	}
+
+	return i - 1;
+}
+
+static int hw_to_idx(struct clk_zx_pll *zx_pll)
+{
+	const struct zx_pll_config *config = zx_pll->lookup_table;
+	u32 hw_cfg0, hw_cfg1;
+	int i;
+
+	hw_cfg0 = readl_relaxed(zx_pll->reg_base);
+	hw_cfg1 = readl_relaxed(zx_pll->reg_base + CFG0_CFG1_OFFSET);
+
+	/* For matching the value in lookup table */
+	hw_cfg0 &= ~LOCK_FLAG;
+	hw_cfg0 |= POWER_DOWN;
+
+	for (i = 0; i < zx_pll->count; i++) {
+		if (hw_cfg0 == config[i].cfg0 && hw_cfg1 == config[i].cfg1)
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static unsigned long zx_pll_recalc_rate(struct clk_hw *hw,
+					unsigned long parent_rate)
+{
+	struct clk_zx_pll *zx_pll = to_clk_zx_pll(hw);
+	int idx;
+
+	idx = hw_to_idx(zx_pll);
+	if (unlikely(idx == -EINVAL))
+		return 0;
+
+	return zx_pll->lookup_table[idx].rate;
+}
+
+static long zx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+			      unsigned long *prate)
+{
+	struct clk_zx_pll *zx_pll = to_clk_zx_pll(hw);
+	int idx;
+
+	idx = rate_to_idx(zx_pll, rate);
+
+	return zx_pll->lookup_table[idx].rate;
+}
+
+static int zx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+			   unsigned long parent_rate)
+{
+	/* Assume current cpu is not running on current PLL */
+	struct clk_zx_pll *zx_pll = to_clk_zx_pll(hw);
+	const struct zx_pll_config *config;
+	int idx;
+
+	idx = rate_to_idx(zx_pll, rate);
+	config = &zx_pll->lookup_table[idx];
+
+	writel_relaxed(config->cfg0, zx_pll->reg_base);
+	writel_relaxed(config->cfg1, zx_pll->reg_base + CFG0_CFG1_OFFSET);
+
+	return 0;
+}
+
+static int zx_pll_enable(struct clk_hw *hw)
+{
+	struct clk_zx_pll *zx_pll = to_clk_zx_pll(hw);
+	u32 reg;
+
+	reg = readl_relaxed(zx_pll->reg_base);
+	writel_relaxed(reg & ~POWER_DOWN, zx_pll->reg_base);
+
+	return readl_relaxed_poll_timeout(zx_pll->reg_base, reg,
+					  reg & LOCK_FLAG, 0, 100);
+}
+
+static void zx_pll_disable(struct clk_hw *hw)
+{
+	struct clk_zx_pll *zx_pll = to_clk_zx_pll(hw);
+	u32 reg;
+
+	reg = readl_relaxed(zx_pll->reg_base);
+	writel_relaxed(reg | POWER_DOWN, zx_pll->reg_base);
+}
+
+static int zx_pll_is_enabled(struct clk_hw *hw)
+{
+	struct clk_zx_pll *zx_pll = to_clk_zx_pll(hw);
+	u32 reg;
+
+	reg = readl_relaxed(zx_pll->reg_base);
+
+	return !(reg & POWER_DOWN);
+}
+
+static const struct clk_ops zx_pll_ops = {
+	.recalc_rate = zx_pll_recalc_rate,
+	.round_rate = zx_pll_round_rate,
+	.set_rate = zx_pll_set_rate,
+	.enable = zx_pll_enable,
+	.disable = zx_pll_disable,
+	.is_enabled = zx_pll_is_enabled,
+};
+
+struct clk *clk_register_zx_pll(const char *name, const char *parent_name,
+	unsigned long flags, void __iomem *reg_base,
+	const struct zx_pll_config *lookup_table, int count, spinlock_t *lock)
+{
+	struct clk_zx_pll *zx_pll;
+	struct clk *clk;
+	struct clk_init_data init;
+
+	zx_pll = kzalloc(sizeof(*zx_pll), GFP_KERNEL);
+	if (!zx_pll)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.ops = &zx_pll_ops;
+	init.flags = flags;
+	init.parent_names = parent_name ? &parent_name : NULL;
+	init.num_parents = parent_name ? 1 : 0;
+
+	zx_pll->reg_base = reg_base;
+	zx_pll->lookup_table = lookup_table;
+	zx_pll->count = count;
+	zx_pll->lock = lock;
+	zx_pll->hw.init = &init;
+
+	clk = clk_register(NULL, &zx_pll->hw);
+	if (IS_ERR(clk))
+		kfree(zx_pll);
+
+	return clk;
+}
diff --git a/drivers/clk/zte/clk-zx296702.c b/drivers/clk/zte/clk-zx296702.c
new file mode 100644
index 000000000000..929d033594af
--- /dev/null
+++ b/drivers/clk/zte/clk-zx296702.c
@@ -0,0 +1,657 @@
+/*
+ * Copyright 2014 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <dt-bindings/clock/zx296702-clock.h>
+#include "clk.h"
+
+static DEFINE_SPINLOCK(reg_lock);
+
+static void __iomem *topcrm_base;
+static void __iomem *lsp0crpm_base;
+static void __iomem *lsp1crpm_base;
+
+static struct clk *topclk[ZX296702_TOPCLK_END];
+static struct clk *lsp0clk[ZX296702_LSP0CLK_END];
+static struct clk *lsp1clk[ZX296702_LSP1CLK_END];
+
+static struct clk_onecell_data topclk_data;
+static struct clk_onecell_data lsp0clk_data;
+static struct clk_onecell_data lsp1clk_data;
+
+#define CLK_MUX			(topcrm_base + 0x04)
+#define CLK_DIV			(topcrm_base + 0x08)
+#define CLK_EN0			(topcrm_base + 0x0c)
+#define CLK_EN1			(topcrm_base + 0x10)
+#define VOU_LOCAL_CLKEN		(topcrm_base + 0x68)
+#define VOU_LOCAL_CLKSEL	(topcrm_base + 0x70)
+#define VOU_LOCAL_DIV2_SET	(topcrm_base + 0x74)
+#define CLK_MUX1		(topcrm_base + 0x8c)
+
+#define CLK_SDMMC1		(lsp0crpm_base + 0x0c)
+
+#define CLK_UART0		(lsp1crpm_base + 0x20)
+#define CLK_UART1		(lsp1crpm_base + 0x24)
+#define CLK_SDMMC0		(lsp1crpm_base + 0x2c)
+
+static const struct zx_pll_config pll_a9_config[] = {
+	{ .rate = 700000000, .cfg0 = 0x800405d1, .cfg1 = 0x04555555 },
+	{ .rate = 800000000, .cfg0 = 0x80040691, .cfg1 = 0x04aaaaaa },
+	{ .rate = 900000000, .cfg0 = 0x80040791, .cfg1 = 0x04000000 },
+	{ .rate = 1000000000, .cfg0 = 0x80040851, .cfg1 = 0x04555555 },
+	{ .rate = 1100000000, .cfg0 = 0x80040911, .cfg1 = 0x04aaaaaa },
+	{ .rate = 1200000000, .cfg0 = 0x80040a11, .cfg1 = 0x04000000 },
+};
+
+static const struct clk_div_table main_hlk_div[] = {
+	{ .val = 1, .div = 2, },
+	{ .val = 3, .div = 4, },
+	{ /* sentinel */ }
+};
+
+static const struct clk_div_table a9_as1_aclk_divider[] = {
+	{ .val = 0, .div = 1, },
+	{ .val = 1, .div = 2, },
+	{ .val = 3, .div = 4, },
+	{ /* sentinel */ }
+};
+
+static const struct clk_div_table sec_wclk_divider[] = {
+	{ .val = 0, .div = 1, },
+	{ .val = 1, .div = 2, },
+	{ .val = 3, .div = 4, },
+	{ .val = 5, .div = 6, },
+	{ .val = 7, .div = 8, },
+	{ /* sentinel */ }
+};
+
+static const char * matrix_aclk_sel[] = {
+	"pll_mm0_198M",
+	"osc",
+	"clk_148M5",
+	"pll_lsp_104M",
+};
+
+static const char * a9_wclk_sel[] = {
+	"pll_a9",
+	"osc",
+	"clk_500",
+	"clk_250",
+};
+
+static const char * a9_as1_aclk_sel[] = {
+	"clk_250",
+	"osc",
+	"pll_mm0_396M",
+	"pll_mac_333M",
+};
+
+static const char * a9_trace_clkin_sel[] = {
+	"clk_74M25",
+	"pll_mm1_108M",
+	"clk_125",
+	"clk_148M5",
+};
+
+static const char * decppu_aclk_sel[] = {
+	"clk_250",
+	"pll_mm0_198M",
+	"pll_lsp_104M",
+	"pll_audio_294M912",
+};
+
+static const char * vou_main_wclk_sel[] = {
+	"clk_148M5",
+	"clk_74M25",
+	"clk_27",
+	"pll_mm1_54M",
+};
+
+static const char * vou_scaler_wclk_sel[] = {
+	"clk_250",
+	"pll_mac_333M",
+	"pll_audio_294M912",
+	"pll_mm0_198M",
+};
+
+static const char * r2d_wclk_sel[] = {
+	"pll_audio_294M912",
+	"pll_mac_333M",
+	"pll_a9_350M",
+	"pll_mm0_396M",
+};
+
+static const char * ddr_wclk_sel[] = {
+	"pll_mac_333M",
+	"pll_ddr_266M",
+	"pll_audio_294M912",
+	"pll_mm0_198M",
+};
+
+static const char * nand_wclk_sel[] = {
+	"pll_lsp_104M",
+	"osc",
+};
+
+static const char * lsp_26_wclk_sel[] = {
+	"pll_lsp_26M",
+	"osc",
+};
+
+static const char * vl0_sel[] = {
+	"vou_main_channel_div",
+	"vou_aux_channel_div",
+};
+
+static const char * hdmi_sel[] = {
+	"vou_main_channel_wclk",
+	"vou_aux_channel_wclk",
+};
+
+static const char * sdmmc0_wclk_sel[] = {
+	"lsp1_104M_wclk",
+	"lsp1_26M_wclk",
+};
+
+static const char * sdmmc1_wclk_sel[] = {
+	"lsp0_104M_wclk",
+	"lsp0_26M_wclk",
+};
+
+static const char * uart_wclk_sel[] = {
+	"lsp1_104M_wclk",
+	"lsp1_26M_wclk",
+};
+
+static inline struct clk *zx_divtbl(const char *name, const char *parent,
+				    void __iomem *reg, u8 shift, u8 width,
+				    const struct clk_div_table *table)
+{
+	return clk_register_divider_table(NULL, name, parent, 0, reg, shift,
+					  width, 0, table, &reg_lock);
+}
+
+static inline struct clk *zx_div(const char *name, const char *parent,
+				 void __iomem *reg, u8 shift, u8 width)
+{
+	return clk_register_divider(NULL, name, parent, 0,
+				    reg, shift, width, 0, &reg_lock);
+}
+
+static inline struct clk *zx_mux(const char *name, const char **parents,
+		int num_parents, void __iomem *reg, u8 shift, u8 width)
+{
+	return clk_register_mux(NULL, name, parents, num_parents,
+				0, reg, shift, width, 0, &reg_lock);
+}
+
+static inline struct clk *zx_gate(const char *name, const char *parent,
+				  void __iomem *reg, u8 shift)
+{
+	return clk_register_gate(NULL, name, parent, CLK_IGNORE_UNUSED,
+				 reg, shift, 0, &reg_lock);
+}
+
+static void __init zx296702_top_clocks_init(struct device_node *np)
+{
+	struct clk **clk = topclk;
+	int i;
+
+	topcrm_base = of_iomap(np, 0);
+	WARN_ON(!topcrm_base);
+
+	clk[ZX296702_OSC] =
+		clk_register_fixed_rate(NULL, "osc", NULL, CLK_IS_ROOT,
+				30000000);
+	clk[ZX296702_PLL_A9] =
+		clk_register_zx_pll("pll_a9", "osc", 0, topcrm_base
+				+ 0x01c, pll_a9_config,
+				ARRAY_SIZE(pll_a9_config), &reg_lock);
+
+	/* TODO: pll_a9_350M look like changeble follow a9 pll */
+	clk[ZX296702_PLL_A9_350M] =
+		clk_register_fixed_rate(NULL, "pll_a9_350M", "osc", 0,
+				350000000);
+	clk[ZX296702_PLL_MAC_1000M] =
+		clk_register_fixed_rate(NULL, "pll_mac_1000M", "osc", 0,
+				1000000000);
+	clk[ZX296702_PLL_MAC_333M] =
+		clk_register_fixed_rate(NULL, "pll_mac_333M",	 "osc", 0,
+				333000000);
+	clk[ZX296702_PLL_MM0_1188M] =
+		clk_register_fixed_rate(NULL, "pll_mm0_1188M", "osc", 0,
+				1188000000);
+	clk[ZX296702_PLL_MM0_396M] =
+		clk_register_fixed_rate(NULL, "pll_mm0_396M",  "osc", 0,
+				396000000);
+	clk[ZX296702_PLL_MM0_198M] =
+		clk_register_fixed_rate(NULL, "pll_mm0_198M",  "osc", 0,
+				198000000);
+	clk[ZX296702_PLL_MM1_108M] =
+		clk_register_fixed_rate(NULL, "pll_mm1_108M",  "osc", 0,
+				108000000);
+	clk[ZX296702_PLL_MM1_72M] =
+		clk_register_fixed_rate(NULL, "pll_mm1_72M",	 "osc", 0,
+				72000000);
+	clk[ZX296702_PLL_MM1_54M] =
+		clk_register_fixed_rate(NULL, "pll_mm1_54M",	 "osc", 0,
+				54000000);
+	clk[ZX296702_PLL_LSP_104M] =
+		clk_register_fixed_rate(NULL, "pll_lsp_104M",  "osc", 0,
+				104000000);
+	clk[ZX296702_PLL_LSP_26M] =
+		clk_register_fixed_rate(NULL, "pll_lsp_26M",	 "osc", 0,
+				26000000);
+	clk[ZX296702_PLL_DDR_266M] =
+		clk_register_fixed_rate(NULL, "pll_ddr_266M",	 "osc", 0,
+				266000000);
+	clk[ZX296702_PLL_AUDIO_294M912] =
+		clk_register_fixed_rate(NULL, "pll_audio_294M912", "osc", 0,
+				294912000);
+
+	/* bus clock */
+	clk[ZX296702_MATRIX_ACLK] =
+		zx_mux("matrix_aclk", matrix_aclk_sel,
+				ARRAY_SIZE(matrix_aclk_sel), CLK_MUX, 2, 2);
+	clk[ZX296702_MAIN_HCLK] =
+		zx_divtbl("main_hclk", "matrix_aclk", CLK_DIV, 0, 2,
+				main_hlk_div);
+	clk[ZX296702_MAIN_PCLK] =
+		zx_divtbl("main_pclk", "matrix_aclk", CLK_DIV, 2, 2,
+				main_hlk_div);
+
+	/* cpu clock */
+	clk[ZX296702_CLK_500] =
+		clk_register_fixed_factor(NULL, "clk_500", "pll_mac_1000M", 0,
+				1, 2);
+	clk[ZX296702_CLK_250] =
+		clk_register_fixed_factor(NULL, "clk_250", "pll_mac_1000M", 0,
+				1, 4);
+	clk[ZX296702_CLK_125] =
+		clk_register_fixed_factor(NULL, "clk_125", "clk_250", 0, 1, 2);
+	clk[ZX296702_CLK_148M5] =
+		clk_register_fixed_factor(NULL, "clk_148M5", "pll_mm0_1188M", 0,
+				1, 8);
+	clk[ZX296702_CLK_74M25] =
+		clk_register_fixed_factor(NULL, "clk_74M25", "pll_mm0_1188M", 0,
+				1, 16);
+	clk[ZX296702_A9_WCLK] =
+		zx_mux("a9_wclk", a9_wclk_sel, ARRAY_SIZE(a9_wclk_sel), CLK_MUX,
+				0, 2);
+	clk[ZX296702_A9_AS1_ACLK_MUX] =
+		zx_mux("a9_as1_aclk_mux", a9_as1_aclk_sel,
+				ARRAY_SIZE(a9_as1_aclk_sel), CLK_MUX, 4, 2);
+	clk[ZX296702_A9_TRACE_CLKIN_MUX] =
+		zx_mux("a9_trace_clkin_mux", a9_trace_clkin_sel,
+				ARRAY_SIZE(a9_trace_clkin_sel), CLK_MUX1, 0, 2);
+	clk[ZX296702_A9_AS1_ACLK_DIV] =
+		zx_divtbl("a9_as1_aclk_div", "a9_as1_aclk_mux", CLK_DIV, 4, 2,
+				a9_as1_aclk_divider);
+
+	/* multi-media clock */
+	clk[ZX296702_CLK_2] =
+		clk_register_fixed_factor(NULL, "clk_2", "pll_mm1_72M", 0,
+				1, 36);
+	clk[ZX296702_CLK_27] =
+		clk_register_fixed_factor(NULL, "clk_27", "pll_mm1_54M", 0,
+				1, 2);
+	clk[ZX296702_DECPPU_ACLK_MUX] =
+		zx_mux("decppu_aclk_mux", decppu_aclk_sel,
+				ARRAY_SIZE(decppu_aclk_sel), CLK_MUX, 6, 2);
+	clk[ZX296702_PPU_ACLK_MUX] =
+		zx_mux("ppu_aclk_mux", decppu_aclk_sel,
+				ARRAY_SIZE(decppu_aclk_sel), CLK_MUX, 8, 2);
+	clk[ZX296702_MALI400_ACLK_MUX] =
+		zx_mux("mali400_aclk_mux", decppu_aclk_sel,
+				ARRAY_SIZE(decppu_aclk_sel), CLK_MUX, 12, 2);
+	clk[ZX296702_VOU_ACLK_MUX] =
+		zx_mux("vou_aclk_mux", decppu_aclk_sel,
+				ARRAY_SIZE(decppu_aclk_sel), CLK_MUX, 10, 2);
+	clk[ZX296702_VOU_MAIN_WCLK_MUX] =
+		zx_mux("vou_main_wclk_mux", vou_main_wclk_sel,
+				ARRAY_SIZE(vou_main_wclk_sel), CLK_MUX, 14, 2);
+	clk[ZX296702_VOU_AUX_WCLK_MUX] =
+		zx_mux("vou_aux_wclk_mux", vou_main_wclk_sel,
+				ARRAY_SIZE(vou_main_wclk_sel), CLK_MUX, 16, 2);
+	clk[ZX296702_VOU_SCALER_WCLK_MUX] =
+		zx_mux("vou_scaler_wclk_mux", vou_scaler_wclk_sel,
+				ARRAY_SIZE(vou_scaler_wclk_sel), CLK_MUX,
+				18, 2);
+	clk[ZX296702_R2D_ACLK_MUX] =
+		zx_mux("r2d_aclk_mux", decppu_aclk_sel,
+				ARRAY_SIZE(decppu_aclk_sel), CLK_MUX, 20, 2);
+	clk[ZX296702_R2D_WCLK_MUX] =
+		zx_mux("r2d_wclk_mux", r2d_wclk_sel,
+				ARRAY_SIZE(r2d_wclk_sel), CLK_MUX, 22, 2);
+
+	/* other clock */
+	clk[ZX296702_CLK_50] =
+		clk_register_fixed_factor(NULL, "clk_50", "pll_mac_1000M",
+				0, 1, 20);
+	clk[ZX296702_CLK_25] =
+		clk_register_fixed_factor(NULL, "clk_25", "pll_mac_1000M",
+				0, 1, 40);
+	clk[ZX296702_CLK_12] =
+		clk_register_fixed_factor(NULL, "clk_12", "pll_mm1_72M",
+				0, 1, 6);
+	clk[ZX296702_CLK_16M384] =
+		clk_register_fixed_factor(NULL, "clk_16M384",
+				"pll_audio_294M912", 0, 1, 18);
+	clk[ZX296702_CLK_32K768] =
+		clk_register_fixed_factor(NULL, "clk_32K768", "clk_16M384",
+				0, 1, 500);
+	clk[ZX296702_SEC_WCLK_DIV] =
+		zx_divtbl("sec_wclk_div", "pll_lsp_104M", CLK_DIV, 6, 3,
+				sec_wclk_divider);
+	clk[ZX296702_DDR_WCLK_MUX] =
+		zx_mux("ddr_wclk_mux", ddr_wclk_sel,
+				ARRAY_SIZE(ddr_wclk_sel), CLK_MUX, 24, 2);
+	clk[ZX296702_NAND_WCLK_MUX] =
+		zx_mux("nand_wclk_mux", nand_wclk_sel,
+				ARRAY_SIZE(nand_wclk_sel), CLK_MUX, 24, 2);
+	clk[ZX296702_LSP_26_WCLK_MUX] =
+		zx_mux("lsp_26_wclk_mux", lsp_26_wclk_sel,
+				ARRAY_SIZE(lsp_26_wclk_sel), CLK_MUX, 27, 1);
+
+	/* gates */
+	clk[ZX296702_A9_AS0_ACLK] =
+		zx_gate("a9_as0_aclk",	"matrix_aclk",		CLK_EN0, 0);
+	clk[ZX296702_A9_AS1_ACLK] =
+		zx_gate("a9_as1_aclk",	"a9_as1_aclk_div",	CLK_EN0, 1);
+	clk[ZX296702_A9_TRACE_CLKIN] =
+		zx_gate("a9_trace_clkin", "a9_trace_clkin_mux",	CLK_EN0, 2);
+	clk[ZX296702_DECPPU_AXI_M_ACLK] =
+		zx_gate("decppu_axi_m_aclk", "decppu_aclk_mux", CLK_EN0, 3);
+	clk[ZX296702_DECPPU_AHB_S_HCLK] =
+		zx_gate("decppu_ahb_s_hclk",	"main_hclk",	CLK_EN0, 4);
+	clk[ZX296702_PPU_AXI_M_ACLK] =
+		zx_gate("ppu_axi_m_aclk",	"ppu_aclk_mux",	CLK_EN0, 5);
+	clk[ZX296702_PPU_AHB_S_HCLK] =
+		zx_gate("ppu_ahb_s_hclk",	"main_hclk",	CLK_EN0, 6);
+	clk[ZX296702_VOU_AXI_M_ACLK] =
+		zx_gate("vou_axi_m_aclk",	"vou_aclk_mux",	CLK_EN0, 7);
+	clk[ZX296702_VOU_APB_PCLK] =
+		zx_gate("vou_apb_pclk",	"main_pclk",		CLK_EN0, 8);
+	clk[ZX296702_VOU_MAIN_CHANNEL_WCLK] =
+		zx_gate("vou_main_channel_wclk", "vou_main_wclk_mux",
+				CLK_EN0, 9);
+	clk[ZX296702_VOU_AUX_CHANNEL_WCLK] =
+		zx_gate("vou_aux_channel_wclk", "vou_aux_wclk_mux",
+				CLK_EN0, 10);
+	clk[ZX296702_VOU_HDMI_OSCLK_CEC] =
+		zx_gate("vou_hdmi_osclk_cec", "clk_2",		CLK_EN0, 11);
+	clk[ZX296702_VOU_SCALER_WCLK] =
+		zx_gate("vou_scaler_wclk", "vou_scaler_wclk_mux", CLK_EN0, 12);
+	clk[ZX296702_MALI400_AXI_M_ACLK] =
+		zx_gate("mali400_axi_m_aclk", "mali400_aclk_mux", CLK_EN0, 13);
+	clk[ZX296702_MALI400_APB_PCLK] =
+		zx_gate("mali400_apb_pclk",	"main_pclk",	CLK_EN0, 14);
+	clk[ZX296702_R2D_WCLK] =
+		zx_gate("r2d_wclk",		"r2d_wclk_mux",	CLK_EN0, 15);
+	clk[ZX296702_R2D_AXI_M_ACLK] =
+		zx_gate("r2d_axi_m_aclk",	"r2d_aclk_mux",	CLK_EN0, 16);
+	clk[ZX296702_R2D_AHB_HCLK] =
+		zx_gate("r2d_ahb_hclk",		"main_hclk",	CLK_EN0, 17);
+	clk[ZX296702_DDR3_AXI_S0_ACLK] =
+		zx_gate("ddr3_axi_s0_aclk",	"matrix_aclk",	CLK_EN0, 18);
+	clk[ZX296702_DDR3_APB_PCLK] =
+		zx_gate("ddr3_apb_pclk",	"main_pclk",	CLK_EN0, 19);
+	clk[ZX296702_DDR3_WCLK] =
+		zx_gate("ddr3_wclk",		"ddr_wclk_mux",	CLK_EN0, 20);
+	clk[ZX296702_USB20_0_AHB_HCLK] =
+		zx_gate("usb20_0_ahb_hclk",	"main_hclk",	CLK_EN0, 21);
+	clk[ZX296702_USB20_0_EXTREFCLK] =
+		zx_gate("usb20_0_extrefclk",	"clk_12",	CLK_EN0, 22);
+	clk[ZX296702_USB20_1_AHB_HCLK] =
+		zx_gate("usb20_1_ahb_hclk",	"main_hclk",	CLK_EN0, 23);
+	clk[ZX296702_USB20_1_EXTREFCLK] =
+		zx_gate("usb20_1_extrefclk",	"clk_12",	CLK_EN0, 24);
+	clk[ZX296702_USB20_2_AHB_HCLK] =
+		zx_gate("usb20_2_ahb_hclk",	"main_hclk",	CLK_EN0, 25);
+	clk[ZX296702_USB20_2_EXTREFCLK] =
+		zx_gate("usb20_2_extrefclk",	"clk_12",	CLK_EN0, 26);
+	clk[ZX296702_GMAC_AXI_M_ACLK] =
+		zx_gate("gmac_axi_m_aclk",	"matrix_aclk",	CLK_EN0, 27);
+	clk[ZX296702_GMAC_APB_PCLK] =
+		zx_gate("gmac_apb_pclk",	"main_pclk",	CLK_EN0, 28);
+	clk[ZX296702_GMAC_125_CLKIN] =
+		zx_gate("gmac_125_clkin",	"clk_125",	CLK_EN0, 29);
+	clk[ZX296702_GMAC_RMII_CLKIN] =
+		zx_gate("gmac_rmii_clkin",	"clk_50",	CLK_EN0, 30);
+	clk[ZX296702_GMAC_25M_CLK] =
+		zx_gate("gmac_25M_clk",		"clk_25",	CLK_EN0, 31);
+	clk[ZX296702_NANDFLASH_AHB_HCLK] =
+		zx_gate("nandflash_ahb_hclk", "main_hclk",	CLK_EN1, 0);
+	clk[ZX296702_NANDFLASH_WCLK] =
+		zx_gate("nandflash_wclk",     "nand_wclk_mux",	CLK_EN1, 1);
+	clk[ZX296702_LSP0_APB_PCLK] =
+		zx_gate("lsp0_apb_pclk",	"main_pclk",	CLK_EN1, 2);
+	clk[ZX296702_LSP0_AHB_HCLK] =
+		zx_gate("lsp0_ahb_hclk",	"main_hclk",	CLK_EN1, 3);
+	clk[ZX296702_LSP0_26M_WCLK] =
+		zx_gate("lsp0_26M_wclk",   "lsp_26_wclk_mux",	CLK_EN1, 4);
+	clk[ZX296702_LSP0_104M_WCLK] =
+		zx_gate("lsp0_104M_wclk",	"pll_lsp_104M",	CLK_EN1, 5);
+	clk[ZX296702_LSP0_16M384_WCLK] =
+		zx_gate("lsp0_16M384_wclk",	"clk_16M384",	CLK_EN1, 6);
+	clk[ZX296702_LSP1_APB_PCLK] =
+		zx_gate("lsp1_apb_pclk",	"main_pclk",	CLK_EN1, 7);
+	/* FIXME: wclk enable bit is bit8. We hack it as reserved 31 for
+	 * UART does not work after parent clk is disabled/enabled */
+	clk[ZX296702_LSP1_26M_WCLK] =
+		zx_gate("lsp1_26M_wclk",     "lsp_26_wclk_mux",	CLK_EN1, 31);
+	clk[ZX296702_LSP1_104M_WCLK] =
+		zx_gate("lsp1_104M_wclk",    "pll_lsp_104M",	CLK_EN1, 9);
+	clk[ZX296702_LSP1_32K_CLK] =
+		zx_gate("lsp1_32K_clk",	"clk_32K768",		CLK_EN1, 10);
+	clk[ZX296702_AON_HCLK] =
+		zx_gate("aon_hclk",		"main_hclk",	CLK_EN1, 11);
+	clk[ZX296702_SYS_CTRL_PCLK] =
+		zx_gate("sys_ctrl_pclk",	"main_pclk",	CLK_EN1, 12);
+	clk[ZX296702_DMA_PCLK] =
+		zx_gate("dma_pclk",		"main_pclk",	CLK_EN1, 13);
+	clk[ZX296702_DMA_ACLK] =
+		zx_gate("dma_aclk",		"matrix_aclk",	CLK_EN1, 14);
+	clk[ZX296702_SEC_HCLK] =
+		zx_gate("sec_hclk",		"main_hclk",	CLK_EN1, 15);
+	clk[ZX296702_AES_WCLK] =
+		zx_gate("aes_wclk",		"sec_wclk_div",	CLK_EN1, 16);
+	clk[ZX296702_DES_WCLK] =
+		zx_gate("des_wclk",		"sec_wclk_div",	CLK_EN1, 17);
+	clk[ZX296702_IRAM_ACLK] =
+		zx_gate("iram_aclk",		"matrix_aclk",	CLK_EN1, 18);
+	clk[ZX296702_IROM_ACLK] =
+		zx_gate("irom_aclk",		"matrix_aclk",	CLK_EN1, 19);
+	clk[ZX296702_BOOT_CTRL_HCLK] =
+		zx_gate("boot_ctrl_hclk",	"main_hclk",	CLK_EN1, 20);
+	clk[ZX296702_EFUSE_CLK_30] =
+		zx_gate("efuse_clk_30",	"osc",			CLK_EN1, 21);
+
+	/* TODO: add VOU Local clocks */
+	clk[ZX296702_VOU_MAIN_CHANNEL_DIV] =
+		zx_div("vou_main_channel_div", "vou_main_channel_wclk",
+				VOU_LOCAL_DIV2_SET, 1, 1);
+	clk[ZX296702_VOU_AUX_CHANNEL_DIV] =
+		zx_div("vou_aux_channel_div", "vou_aux_channel_wclk",
+				VOU_LOCAL_DIV2_SET, 0, 1);
+	clk[ZX296702_VOU_TV_ENC_HD_DIV] =
+		zx_div("vou_tv_enc_hd_div", "vou_tv_enc_hd_mux",
+				VOU_LOCAL_DIV2_SET, 3, 1);
+	clk[ZX296702_VOU_TV_ENC_SD_DIV] =
+		zx_div("vou_tv_enc_sd_div", "vou_tv_enc_sd_mux",
+				VOU_LOCAL_DIV2_SET, 2, 1);
+	clk[ZX296702_VL0_MUX] =
+		zx_mux("vl0_mux", vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 8, 1);
+	clk[ZX296702_VL1_MUX] =
+		zx_mux("vl1_mux", vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 9, 1);
+	clk[ZX296702_VL2_MUX] =
+		zx_mux("vl2_mux", vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 10, 1);
+	clk[ZX296702_GL0_MUX] =
+		zx_mux("gl0_mux", vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 5, 1);
+	clk[ZX296702_GL1_MUX] =
+		zx_mux("gl1_mux", vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 6, 1);
+	clk[ZX296702_GL2_MUX] =
+		zx_mux("gl2_mux", vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 7, 1);
+	clk[ZX296702_WB_MUX] =
+		zx_mux("wb_mux",  vl0_sel, ARRAY_SIZE(vl0_sel),
+				VOU_LOCAL_CLKSEL, 11, 1);
+	clk[ZX296702_HDMI_MUX] =
+		zx_mux("hdmi_mux", hdmi_sel, ARRAY_SIZE(hdmi_sel),
+				VOU_LOCAL_CLKSEL, 4, 1);
+	clk[ZX296702_VOU_TV_ENC_HD_MUX] =
+		zx_mux("vou_tv_enc_hd_mux", hdmi_sel, ARRAY_SIZE(hdmi_sel),
+				VOU_LOCAL_CLKSEL, 3, 1);
+	clk[ZX296702_VOU_TV_ENC_SD_MUX] =
+		zx_mux("vou_tv_enc_sd_mux", hdmi_sel, ARRAY_SIZE(hdmi_sel),
+				VOU_LOCAL_CLKSEL, 2, 1);
+	clk[ZX296702_VL0_CLK] =
+		zx_gate("vl0_clk", "vl0_mux", VOU_LOCAL_CLKEN, 8);
+	clk[ZX296702_VL1_CLK] =
+		zx_gate("vl1_clk", "vl1_mux", VOU_LOCAL_CLKEN, 9);
+	clk[ZX296702_VL2_CLK] =
+		zx_gate("vl2_clk", "vl2_mux", VOU_LOCAL_CLKEN, 10);
+	clk[ZX296702_GL0_CLK] =
+		zx_gate("gl0_clk", "gl0_mux", VOU_LOCAL_CLKEN, 5);
+	clk[ZX296702_GL1_CLK] =
+		zx_gate("gl1_clk", "gl1_mux", VOU_LOCAL_CLKEN, 6);
+	clk[ZX296702_GL2_CLK] =
+		zx_gate("gl2_clk", "gl2_mux", VOU_LOCAL_CLKEN, 7);
+	clk[ZX296702_WB_CLK] =
+		zx_gate("wb_clk", "wb_mux", VOU_LOCAL_CLKEN, 11);
+	clk[ZX296702_CL_CLK] =
+		zx_gate("cl_clk", "vou_main_channel_div", VOU_LOCAL_CLKEN, 12);
+	clk[ZX296702_MAIN_MIX_CLK] =
+		zx_gate("main_mix_clk", "vou_main_channel_div",
+				VOU_LOCAL_CLKEN, 4);
+	clk[ZX296702_AUX_MIX_CLK] =
+		zx_gate("aux_mix_clk", "vou_aux_channel_div",
+				VOU_LOCAL_CLKEN, 3);
+	clk[ZX296702_HDMI_CLK] =
+		zx_gate("hdmi_clk", "hdmi_mux", VOU_LOCAL_CLKEN, 2);
+	clk[ZX296702_VOU_TV_ENC_HD_DAC_CLK] =
+		zx_gate("vou_tv_enc_hd_dac_clk", "vou_tv_enc_hd_div",
+				VOU_LOCAL_CLKEN, 1);
+	clk[ZX296702_VOU_TV_ENC_SD_DAC_CLK] =
+		zx_gate("vou_tv_enc_sd_dac_clk", "vou_tv_enc_sd_div",
+				VOU_LOCAL_CLKEN, 0);
+
+	/* CA9 PERIPHCLK = a9_wclk / 2 */
+	clk[ZX296702_A9_PERIPHCLK] =
+		clk_register_fixed_factor(NULL, "a9_periphclk", "a9_wclk",
+				0, 1, 2);
+
+	for (i = 0; i < ARRAY_SIZE(topclk); i++) {
+		if (IS_ERR(clk[i])) {
+			pr_err("zx296702 clk %d: register failed with %ld\n",
+				i, PTR_ERR(clk[i]));
+			return;
+		}
+	}
+
+	topclk_data.clks = topclk;
+	topclk_data.clk_num = ARRAY_SIZE(topclk);
+	of_clk_add_provider(np, of_clk_src_onecell_get, &topclk_data);
+}
+CLK_OF_DECLARE(zx296702_top_clk, "zte,zx296702-topcrm-clk",
+		zx296702_top_clocks_init);
+
+static void __init zx296702_lsp0_clocks_init(struct device_node *np)
+{
+	struct clk **clk = lsp0clk;
+	int i;
+
+	lsp0crpm_base = of_iomap(np, 0);
+	WARN_ON(!lsp0crpm_base);
+
+	/* SDMMC1 */
+	clk[ZX296702_SDMMC1_WCLK_MUX] =
+		zx_mux("sdmmc1_wclk_mux", sdmmc1_wclk_sel,
+				ARRAY_SIZE(sdmmc1_wclk_sel), CLK_SDMMC1, 4, 1);
+	clk[ZX296702_SDMMC1_WCLK_DIV] =
+		zx_div("sdmmc1_wclk_div", "sdmmc1_wclk_mux", CLK_SDMMC1, 12, 4);
+	clk[ZX296702_SDMMC1_WCLK] =
+		zx_gate("sdmmc1_wclk", "sdmmc1_wclk_div", CLK_SDMMC1, 1);
+	clk[ZX296702_SDMMC1_PCLK] =
+		zx_gate("sdmmc1_pclk", "lsp1_apb_pclk", CLK_SDMMC1, 0);
+
+	for (i = 0; i < ARRAY_SIZE(lsp0clk); i++) {
+		if (IS_ERR(clk[i])) {
+			pr_err("zx296702 clk %d: register failed with %ld\n",
+				i, PTR_ERR(clk[i]));
+			return;
+		}
+	}
+
+	lsp0clk_data.clks = lsp0clk;
+	lsp0clk_data.clk_num = ARRAY_SIZE(lsp0clk);
+	of_clk_add_provider(np, of_clk_src_onecell_get, &lsp0clk_data);
+}
+CLK_OF_DECLARE(zx296702_lsp0_clk, "zte,zx296702-lsp0crpm-clk",
+		zx296702_lsp0_clocks_init);
+
+static void __init zx296702_lsp1_clocks_init(struct device_node *np)
+{
+	struct clk **clk = lsp1clk;
+	int i;
+
+	lsp1crpm_base = of_iomap(np, 0);
+	WARN_ON(!lsp1crpm_base);
+
+	/* UART0 */
+	clk[ZX296702_UART0_WCLK_MUX] =
+		zx_mux("uart0_wclk_mux", uart_wclk_sel,
+				ARRAY_SIZE(uart_wclk_sel), CLK_UART0, 4, 1);
+	/* FIXME: uart wclk enable bit is bit1 in. We hack it as reserved 31 for
+	 * UART does not work after parent clk is disabled/enabled */
+	clk[ZX296702_UART0_WCLK] =
+		zx_gate("uart0_wclk", "uart0_wclk_mux", CLK_UART0, 31);
+	clk[ZX296702_UART0_PCLK] =
+		zx_gate("uart0_pclk", "lsp1_apb_pclk", CLK_UART0, 0);
+
+	/* UART1 */
+	clk[ZX296702_UART1_WCLK_MUX] =
+		zx_mux("uart1_wclk_mux", uart_wclk_sel,
+				ARRAY_SIZE(uart_wclk_sel), CLK_UART1, 4, 1);
+	clk[ZX296702_UART1_WCLK] =
+		zx_gate("uart1_wclk", "uart1_wclk_mux", CLK_UART1, 1);
+	clk[ZX296702_UART1_PCLK] =
+		zx_gate("uart1_pclk", "lsp1_apb_pclk", CLK_UART1, 0);
+
+	/* SDMMC0 */
+	clk[ZX296702_SDMMC0_WCLK_MUX] =
+		zx_mux("sdmmc0_wclk_mux", sdmmc0_wclk_sel,
+				ARRAY_SIZE(sdmmc0_wclk_sel), CLK_SDMMC0, 4, 1);
+	clk[ZX296702_SDMMC0_WCLK_DIV] =
+		zx_div("sdmmc0_wclk_div", "sdmmc0_wclk_mux", CLK_SDMMC0, 12, 4);
+	clk[ZX296702_SDMMC0_WCLK] =
+		zx_gate("sdmmc0_wclk", "sdmmc0_wclk_div", CLK_SDMMC0, 1);
+	clk[ZX296702_SDMMC0_PCLK] =
+		zx_gate("sdmmc0_pclk", "lsp1_apb_pclk", CLK_SDMMC0, 0);
+
+	for (i = 0; i < ARRAY_SIZE(lsp1clk); i++) {
+		if (IS_ERR(clk[i])) {
+			pr_err("zx296702 clk %d: register failed with %ld\n",
+				i, PTR_ERR(clk[i]));
+			return;
+		}
+	}
+
+	lsp1clk_data.clks = lsp1clk;
+	lsp1clk_data.clk_num = ARRAY_SIZE(lsp1clk);
+	of_clk_add_provider(np, of_clk_src_onecell_get, &lsp1clk_data);
+}
+CLK_OF_DECLARE(zx296702_lsp1_clk, "zte,zx296702-lsp1crpm-clk",
+		zx296702_lsp1_clocks_init);
diff --git a/drivers/clk/zte/clk.h b/drivers/clk/zte/clk.h
new file mode 100644
index 000000000000..0914a82d0535
--- /dev/null
+++ b/drivers/clk/zte/clk.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2015 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ZTE_CLK_H
+#define __ZTE_CLK_H
+#include <linux/clk-provider.h>
+#include <linux/spinlock.h>
+
+struct zx_pll_config {
+	unsigned long rate;
+	u32 cfg0;
+	u32 cfg1;
+};
+
+struct clk_zx_pll {
+	struct clk_hw hw;
+	void __iomem *reg_base;
+	const struct zx_pll_config *lookup_table; /* order by rate asc */
+	int count;
+	spinlock_t *lock;
+};
+
+struct clk *clk_register_zx_pll(const char *name, const char *parent_name,
+	unsigned long flags, void __iomem *reg_base,
+	const struct zx_pll_config *lookup_table, int count, spinlock_t *lock);
+#endif