clk: Add rp1 clock driver

RP1 contains various PLLs and clocks for driving the hardware
blocks, so add a driver to configure these.

FIXME: Checkpatch error over lines ending with (

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

3 files changed, 2093 insertions, 0 deletions

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 50af5fc7f57080..b1acb763c43176 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -88,6 +88,13 @@ config COMMON_CLK_RK808
 	  These multi-function devices have two fixed-rate oscillators, clocked at 32KHz each.
 	  Clkout1 is always on, Clkout2 can off by control register.
 
+config COMMON_CLK_RP1
+	tristate "Raspberry Pi RP1-based clock support"
+	depends on PCI || COMPILE_TEST
+	depends on COMMON_CLK
+	help
+	  Enable common clock framework support for Raspberry Pi RP1
+
 config COMMON_CLK_HI655X
 	tristate "Clock driver for Hi655x" if EXPERT
 	depends on (MFD_HI655X_PMIC || COMPILE_TEST)
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 14fa8d4ecc1fbe..5bdf65cca05efa 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_CLK_LS1028A_PLLDIG)	+= clk-plldig.o
 obj-$(CONFIG_COMMON_CLK_PWM)		+= clk-pwm.o
 obj-$(CONFIG_CLK_QORIQ)			+= clk-qoriq.o
 obj-$(CONFIG_COMMON_CLK_RK808)		+= clk-rk808.o
+obj-$(CONFIG_COMMON_CLK_RP1)		+= clk-rp1.o
 obj-$(CONFIG_COMMON_CLK_HI655X)		+= clk-hi655x.o
 obj-$(CONFIG_COMMON_CLK_S2MPS11)	+= clk-s2mps11.o
 obj-$(CONFIG_COMMON_CLK_SCMI)           += clk-scmi.o
diff --git a/drivers/clk/clk-rp1.c b/drivers/clk/clk-rp1.c
new file mode 100644
index 00000000000000..f61f7526ce9d00
--- /dev/null
+++ b/drivers/clk/clk-rp1.c
@@ -0,0 +1,2085 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Raspberry Pi Ltd.
+ *
+ * Clock driver for RP1 PCIe multifunction chip.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/rp1_platform.h>
+#include <linux/slab.h>
+
+#include <asm/div64.h>
+
+#include <dt-bindings/clock/rp1.h>
+
+#define PLL_SYS_CS			0x08000
+#define PLL_SYS_PWR			0x08004
+#define PLL_SYS_FBDIV_INT		0x08008
+#define PLL_SYS_FBDIV_FRAC		0x0800c
+#define PLL_SYS_PRIM			0x08010
+#define PLL_SYS_SEC			0x08014
+
+#define PLL_AUDIO_CS			0x0c000
+#define PLL_AUDIO_PWR			0x0c004
+#define PLL_AUDIO_FBDIV_INT		0x0c008
+#define PLL_AUDIO_FBDIV_FRAC		0x0c00c
+#define PLL_AUDIO_PRIM			0x0c010
+#define PLL_AUDIO_SEC			0x0c014
+
+#define PLL_VIDEO_CS			0x10000
+#define PLL_VIDEO_PWR			0x10004
+#define PLL_VIDEO_FBDIV_INT		0x10008
+#define PLL_VIDEO_FBDIV_FRAC		0x1000c
+#define PLL_VIDEO_PRIM			0x10010
+#define PLL_VIDEO_SEC			0x10014
+
+#define CLK_SYS_CTRL			0x00014
+#define CLK_SYS_DIV_INT			0x00018
+#define CLK_SYS_SEL			0x00020
+
+#define CLK_SLOW_SYS_CTRL		0x00024
+#define CLK_SLOW_SYS_DIV_INT		0x00028
+#define CLK_SLOW_SYS_SEL		0x00030
+
+#define CLK_DMA_CTRL			0x00044
+#define CLK_DMA_DIV_INT			0x00048
+#define CLK_DMA_SEL			0x00050
+
+#define CLK_UART_CTRL			0x00054
+#define CLK_UART_DIV_INT		0x00058
+#define CLK_UART_SEL			0x00060
+
+#define CLK_ETH_CTRL			0x00064
+#define CLK_ETH_DIV_INT			0x00068
+#define CLK_ETH_SEL			0x00070
+
+#define CLK_PWM0_CTRL			0x00074
+#define CLK_PWM0_DIV_INT		0x00078
+#define CLK_PWM0_DIV_FRAC		0x0007c
+#define CLK_PWM0_SEL			0x00080
+
+#define CLK_PWM1_CTRL			0x00084
+#define CLK_PWM1_DIV_INT		0x00088
+#define CLK_PWM1_DIV_FRAC		0x0008c
+#define CLK_PWM1_SEL			0x00090
+
+#define CLK_AUDIO_IN_CTRL		0x00094
+#define CLK_AUDIO_IN_DIV_INT		0x00098
+#define CLK_AUDIO_IN_SEL		0x000a0
+
+#define CLK_AUDIO_OUT_CTRL		0x000a4
+#define CLK_AUDIO_OUT_DIV_INT		0x000a8
+#define CLK_AUDIO_OUT_SEL		0x000b0
+
+#define CLK_I2S_CTRL			0x000b4
+#define CLK_I2S_DIV_INT			0x000b8
+#define CLK_I2S_SEL			0x000c0
+
+#define CLK_MIPI0_CFG_CTRL		0x000c4
+#define CLK_MIPI0_CFG_DIV_INT		0x000c8
+#define CLK_MIPI0_CFG_SEL		0x000d0
+
+#define CLK_MIPI1_CFG_CTRL		0x000d4
+#define CLK_MIPI1_CFG_DIV_INT		0x000d8
+#define CLK_MIPI1_CFG_SEL		0x000e0
+
+#define CLK_PCIE_AUX_CTRL		0x000e4
+#define CLK_PCIE_AUX_DIV_INT		0x000e8
+#define CLK_PCIE_AUX_SEL		0x000f0
+
+#define CLK_USBH0_MICROFRAME_CTRL	0x000f4
+#define CLK_USBH0_MICROFRAME_DIV_INT	0x000f8
+#define CLK_USBH0_MICROFRAME_SEL	0x00100
+
+#define CLK_USBH1_MICROFRAME_CTRL	0x00104
+#define CLK_USBH1_MICROFRAME_DIV_INT	0x00108
+#define CLK_USBH1_MICROFRAME_SEL	0x00110
+
+#define CLK_USBH0_SUSPEND_CTRL		0x00114
+#define CLK_USBH0_SUSPEND_DIV_INT	0x00118
+#define CLK_USBH0_SUSPEND_SEL		0x00120
+
+#define CLK_USBH1_SUSPEND_CTRL		0x00124
+#define CLK_USBH1_SUSPEND_DIV_INT	0x00128
+#define CLK_USBH1_SUSPEND_SEL		0x00130
+
+#define CLK_ETH_TSU_CTRL		0x00134
+#define CLK_ETH_TSU_DIV_INT		0x00138
+#define CLK_ETH_TSU_SEL			0x00140
+
+#define CLK_ADC_CTRL			0x00144
+#define CLK_ADC_DIV_INT			0x00148
+#define CLK_ADC_SEL			0x00150
+
+#define CLK_SDIO_TIMER_CTRL		0x00154
+#define CLK_SDIO_TIMER_DIV_INT		0x00158
+#define CLK_SDIO_TIMER_SEL		0x00160
+
+#define CLK_SDIO_ALT_SRC_CTRL		0x00164
+#define CLK_SDIO_ALT_SRC_DIV_INT	0x00168
+#define CLK_SDIO_ALT_SRC_SEL		0x00170
+
+#define CLK_GP0_CTRL			0x00174
+#define CLK_GP0_DIV_INT			0x00178
+#define CLK_GP0_DIV_FRAC		0x0017c
+#define CLK_GP0_SEL			0x00180
+
+#define CLK_GP1_CTRL			0x00184
+#define CLK_GP1_DIV_INT			0x00188
+#define CLK_GP1_DIV_FRAC		0x0018c
+#define CLK_GP1_SEL			0x00190
+
+#define CLK_GP2_CTRL			0x00194
+#define CLK_GP2_DIV_INT			0x00198
+#define CLK_GP2_DIV_FRAC		0x0019c
+#define CLK_GP2_SEL			0x001a0
+
+#define CLK_GP3_CTRL			0x001a4
+#define CLK_GP3_DIV_INT			0x001a8
+#define CLK_GP3_DIV_FRAC		0x001ac
+#define CLK_GP3_SEL			0x001b0
+
+#define CLK_GP4_CTRL			0x001b4
+#define CLK_GP4_DIV_INT			0x001b8
+#define CLK_GP4_DIV_FRAC		0x001bc
+#define CLK_GP4_SEL			0x001c0
+
+#define CLK_GP5_CTRL			0x001c4
+#define CLK_GP5_DIV_INT			0x001c8
+#define CLK_GP5_DIV_FRAC		0x001cc
+#define CLK_GP5_SEL			0x001d0
+
+#define CLK_SYS_RESUS_CTRL		0x0020c
+
+#define CLK_SLOW_SYS_RESUS_CTRL		0x00214
+
+#define FC0_REF_KHZ			0x0021c
+#define FC0_MIN_KHZ			0x00220
+#define FC0_MAX_KHZ			0x00224
+#define FC0_DELAY			0x00228
+#define FC0_INTERVAL			0x0022c
+#define FC0_SRC				0x00230
+#define FC0_STATUS			0x00234
+#define FC0_RESULT			0x00238
+#define FC_SIZE				0x20
+#define FC_COUNT			8
+#define FC_NUM(idx, off)		((idx) * 32 + (off))
+
+#define AUX_SEL				1
+
+#define VIDEO_CLOCKS_OFFSET		0x4000
+#define VIDEO_CLK_VEC_CTRL		(VIDEO_CLOCKS_OFFSET + 0x0000)
+#define VIDEO_CLK_VEC_DIV_INT		(VIDEO_CLOCKS_OFFSET + 0x0004)
+#define VIDEO_CLK_VEC_SEL		(VIDEO_CLOCKS_OFFSET + 0x000c)
+#define VIDEO_CLK_DPI_CTRL		(VIDEO_CLOCKS_OFFSET + 0x0010)
+#define VIDEO_CLK_DPI_DIV_INT		(VIDEO_CLOCKS_OFFSET + 0x0014)
+#define VIDEO_CLK_DPI_SEL		(VIDEO_CLOCKS_OFFSET + 0x001c)
+#define VIDEO_CLK_MIPI0_DPI_CTRL	(VIDEO_CLOCKS_OFFSET + 0x0020)
+#define VIDEO_CLK_MIPI0_DPI_DIV_INT	(VIDEO_CLOCKS_OFFSET + 0x0024)
+#define VIDEO_CLK_MIPI0_DPI_DIV_FRAC	(VIDEO_CLOCKS_OFFSET + 0x0028)
+#define VIDEO_CLK_MIPI0_DPI_SEL		(VIDEO_CLOCKS_OFFSET + 0x002c)
+#define VIDEO_CLK_MIPI1_DPI_CTRL	(VIDEO_CLOCKS_OFFSET + 0x0030)
+#define VIDEO_CLK_MIPI1_DPI_DIV_INT	(VIDEO_CLOCKS_OFFSET + 0x0034)
+#define VIDEO_CLK_MIPI1_DPI_DIV_FRAC	(VIDEO_CLOCKS_OFFSET + 0x0038)
+#define VIDEO_CLK_MIPI1_DPI_SEL		(VIDEO_CLOCKS_OFFSET + 0x003c)
+
+#define DIV_INT_8BIT_MAX		0x000000ffu /* max divide for most clocks */
+#define DIV_INT_16BIT_MAX		0x0000ffffu /* max divide for GPx, PWM */
+#define DIV_INT_24BIT_MAX               0x00ffffffu /* max divide for CLK_SYS */
+
+#define FC0_STATUS_DONE			BIT(4)
+#define FC0_STATUS_RUNNING		BIT(8)
+#define FC0_RESULT_FRAC_SHIFT		5
+
+#define PLL_PRIM_DIV1_SHIFT		16
+#define PLL_PRIM_DIV1_MASK		0x00070000
+#define PLL_PRIM_DIV2_SHIFT		12
+#define PLL_PRIM_DIV2_MASK		0x00007000
+
+#define PLL_SEC_DIV_SHIFT		8
+#define PLL_SEC_DIV_WIDTH		5
+#define PLL_SEC_DIV_MASK		0x00001f00
+
+#define PLL_CS_LOCK			BIT(31)
+#define PLL_CS_REFDIV_SHIFT		0
+
+#define PLL_PWR_PD			BIT(0)
+#define PLL_PWR_DACPD			BIT(1)
+#define PLL_PWR_DSMPD			BIT(2)
+#define PLL_PWR_POSTDIVPD		BIT(3)
+#define PLL_PWR_4PHASEPD		BIT(4)
+#define PLL_PWR_VCOPD			BIT(5)
+#define PLL_PWR_MASK			0x0000003f
+
+#define PLL_SEC_RST			BIT(16)
+#define PLL_SEC_IMPL			BIT(31)
+
+/* PLL phase output for both PRI and SEC */
+#define PLL_PH_EN			BIT(4)
+#define PLL_PH_PHASE_SHIFT		0
+
+#define RP1_PLL_PHASE_0			0
+#define RP1_PLL_PHASE_90		1
+#define RP1_PLL_PHASE_180		2
+#define RP1_PLL_PHASE_270		3
+
+/* Clock fields for all clocks */
+#define CLK_CTRL_ENABLE			BIT(11)
+#define CLK_CTRL_AUXSRC_MASK		0x000003e0
+#define CLK_CTRL_AUXSRC_SHIFT		5
+#define CLK_CTRL_SRC_SHIFT		0
+#define CLK_DIV_FRAC_BITS		16
+
+#define KHz				1000
+#define MHz				(KHz * KHz)
+#define LOCK_TIMEOUT_NS			100000000
+#define FC_TIMEOUT_NS			100000000
+
+#define MAX_CLK_PARENTS	8
+
+#define MEASURE_CLOCK_RATE
+const char * const fc0_ref_clk_name = "clk_slow_sys";
+
+#define ABS_DIFF(a, b) ((a) > (b) ? (a) - (b) : (b) - (a))
+#define DIV_U64_NEAREST(a, b) div_u64(((a) + ((b) >> 1)), (b))
+
+/*
+ * Names of the reference clock for the pll cores.  This name must match
+ * the DT reference clock-output-name.
+ */
+static const char *const ref_clock = "xosc";
+
+/*
+ * Secondary PLL channel output divider table.
+ * Divider values range from 8 to 19.
+ * Invalid values default to 19
+ */
+static const struct clk_div_table pll_sec_div_table[] = {
+	{ 0x00, 19 },
+	{ 0x01, 19 },
+	{ 0x02, 19 },
+	{ 0x03, 19 },
+	{ 0x04, 19 },
+	{ 0x05, 19 },
+	{ 0x06, 19 },
+	{ 0x07, 19 },
+	{ 0x08,  8 },
+	{ 0x09,  9 },
+	{ 0x0a, 10 },
+	{ 0x0b, 11 },
+	{ 0x0c, 12 },
+	{ 0x0d, 13 },
+	{ 0x0e, 14 },
+	{ 0x0f, 15 },
+	{ 0x10, 16 },
+	{ 0x11, 17 },
+	{ 0x12, 18 },
+	{ 0x13, 19 },
+	{ 0x14, 19 },
+	{ 0x15, 19 },
+	{ 0x16, 19 },
+	{ 0x17, 19 },
+	{ 0x18, 19 },
+	{ 0x19, 19 },
+	{ 0x1a, 19 },
+	{ 0x1b, 19 },
+	{ 0x1c, 19 },
+	{ 0x1d, 19 },
+	{ 0x1e, 19 },
+	{ 0x1f, 19 },
+	{ 0 }
+};
+
+struct rp1_clockman {
+	struct device *dev;
+	void __iomem *regs;
+	spinlock_t regs_lock; /* spinlock for all clocks */
+
+	/* Must be last */
+	struct clk_hw_onecell_data onecell;
+};
+
+struct rp1_pll_core_data {
+	const char *name;
+	u32 cs_reg;
+	u32 pwr_reg;
+	u32 fbdiv_int_reg;
+	u32 fbdiv_frac_reg;
+	unsigned long flags;
+	u32 fc0_src;
+};
+
+struct rp1_pll_data {
+	const char *name;
+	const char *source_pll;
+	u32 ctrl_reg;
+	unsigned long flags;
+	u32 fc0_src;
+};
+
+struct rp1_pll_ph_data {
+	const char *name;
+	const char *source_pll;
+	unsigned int phase;
+	unsigned int fixed_divider;
+	u32 ph_reg;
+	unsigned long flags;
+	u32 fc0_src;
+};
+
+struct rp1_pll_divider_data {
+	const char *name;
+	const char *source_pll;
+	u32 sec_reg;
+	unsigned long flags;
+	u32 fc0_src;
+};
+
+struct rp1_clock_data {
+	const char *name;
+	const char *const parents[MAX_CLK_PARENTS];
+	int num_std_parents;
+	int num_aux_parents;
+	unsigned long flags;
+	u32 clk_src_mask;
+	u32 ctrl_reg;
+	u32 div_int_reg;
+	u32 div_frac_reg;
+	u32 sel_reg;
+	u32 div_int_max;
+	u32 fc0_src;
+};
+
+struct rp1_pll_core {
+	struct clk_hw hw;
+	struct rp1_clockman *clockman;
+	const struct rp1_pll_core_data *data;
+	unsigned long cached_rate;
+};
+
+struct rp1_pll {
+	struct clk_hw hw;
+	struct clk_divider div;
+	struct rp1_clockman *clockman;
+	const struct rp1_pll_data *data;
+	unsigned long cached_rate;
+};
+
+struct rp1_pll_ph {
+	struct clk_hw hw;
+	struct rp1_clockman *clockman;
+	const struct rp1_pll_ph_data *data;
+};
+
+struct rp1_clock {
+	struct clk_hw hw;
+	struct rp1_clockman *clockman;
+	const struct rp1_clock_data *data;
+	unsigned long cached_rate;
+};
+
+static void rp1_debugfs_regset(struct rp1_clockman *clockman, u32 base,
+			       const struct debugfs_reg32 *regs,
+			       size_t nregs, struct dentry *dentry)
+{
+	struct debugfs_regset32 *regset;
+
+	regset = devm_kzalloc(clockman->dev, sizeof(*regset), GFP_KERNEL);
+	if (!regset)
+		return;
+
+	regset->regs = regs;
+	regset->nregs = nregs;
+	regset->base = clockman->regs + base;
+
+	debugfs_create_regset32("regdump", 0444, dentry, regset);
+}
+
+static inline u32 set_register_field(u32 reg, u32 val, u32 mask, u32 shift)
+{
+	reg &= ~mask;
+	reg |= (val << shift) & mask;
+	return reg;
+}
+
+static inline
+void clockman_write(struct rp1_clockman *clockman, u32 reg, u32 val)
+{
+	writel(val, clockman->regs + reg);
+}
+
+static inline u32 clockman_read(struct rp1_clockman *clockman, u32 reg)
+{
+	return readl(clockman->regs + reg);
+}
+
+#ifdef MEASURE_CLOCK_RATE
+static unsigned long clockman_measure_clock(struct rp1_clockman *clockman,
+					    const char *clk_name,
+					    unsigned int fc0_src)
+{
+	struct clk *ref_clk = __clk_lookup(fc0_ref_clk_name);
+	unsigned long result;
+	ktime_t timeout;
+	unsigned int fc_idx, fc_offset, fc_src;
+
+	fc_idx = fc0_src / 32;
+	fc_src = fc0_src % 32;
+
+	/* fc_src == 0 is invalid. */
+	if (!fc_src || fc_idx >= FC_COUNT)
+		return 0;
+
+	fc_offset = fc_idx * FC_SIZE;
+
+	/* Ensure the frequency counter is idle. */
+	timeout = ktime_add_ns(ktime_get(), FC_TIMEOUT_NS);
+	while (clockman_read(clockman, fc_offset + FC0_STATUS) & FC0_STATUS_RUNNING) {
+		if (ktime_after(ktime_get(), timeout)) {
+			dev_err(clockman->dev, "%s: FC0 busy timeout\n",
+				clk_name);
+			return 0;
+		}
+		cpu_relax();
+	}
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, fc_offset + FC0_REF_KHZ,
+		       clk_get_rate(ref_clk) / KHz);
+	clockman_write(clockman, fc_offset + FC0_MIN_KHZ, 0);
+	clockman_write(clockman, fc_offset + FC0_MAX_KHZ, 0x1ffffff);
+	clockman_write(clockman, fc_offset + FC0_INTERVAL, 8);
+	clockman_write(clockman, fc_offset + FC0_DELAY, 7);
+	clockman_write(clockman, fc_offset + FC0_SRC, fc_src);
+	spin_unlock(&clockman->regs_lock);
+
+	/* Ensure the frequency counter is idle. */
+	timeout = ktime_add_ns(ktime_get(), FC_TIMEOUT_NS);
+	while (!(clockman_read(clockman, fc_offset + FC0_STATUS) & FC0_STATUS_DONE)) {
+		if (ktime_after(ktime_get(), timeout)) {
+			dev_err(clockman->dev, "%s: FC0 wait timeout\n",
+				clk_name);
+			return 0;
+		}
+		cpu_relax();
+	}
+
+	result = clockman_read(clockman, fc_offset + FC0_RESULT);
+
+	/* Disable FC0 */
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, fc_offset + FC0_SRC, 0);
+	spin_unlock(&clockman->regs_lock);
+
+	return result;
+}
+#endif
+
+static int rp1_pll_core_is_on(struct clk_hw *hw)
+{
+	struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+	struct rp1_clockman *clockman = pll_core->clockman;
+	const struct rp1_pll_core_data *data = pll_core->data;
+	u32 pwr = clockman_read(clockman, data->pwr_reg);
+
+	return (pwr & PLL_PWR_PD) || (pwr & PLL_PWR_POSTDIVPD);
+}
+
+static int rp1_pll_core_on(struct clk_hw *hw)
+{
+	struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+	struct rp1_clockman *clockman = pll_core->clockman;
+	const struct rp1_pll_core_data *data = pll_core->data;
+	u32 fbdiv_frac;
+	ktime_t timeout;
+
+	spin_lock(&clockman->regs_lock);
+
+	if (!(clockman_read(clockman, data->cs_reg) & PLL_CS_LOCK)) {
+		/* Reset to a known state. */
+		clockman_write(clockman, data->pwr_reg, PLL_PWR_MASK);
+		clockman_write(clockman, data->fbdiv_int_reg, 20);
+		clockman_write(clockman, data->fbdiv_frac_reg, 0);
+		clockman_write(clockman, data->cs_reg, 1 << PLL_CS_REFDIV_SHIFT);
+	}
+
+	/* Come out of reset. */
+	fbdiv_frac = clockman_read(clockman, data->fbdiv_frac_reg);
+	clockman_write(clockman, data->pwr_reg, fbdiv_frac ? 0 : PLL_PWR_DSMPD);
+	spin_unlock(&clockman->regs_lock);
+
+	/* Wait for the PLL to lock. */
+	timeout = ktime_add_ns(ktime_get(), LOCK_TIMEOUT_NS);
+	while (!(clockman_read(clockman, data->cs_reg) & PLL_CS_LOCK)) {
+		if (ktime_after(ktime_get(), timeout)) {
+			dev_err(clockman->dev, "%s: can't lock PLL\n",
+				clk_hw_get_name(hw));
+			return -ETIMEDOUT;
+		}
+		cpu_relax();
+	}
+
+	return 0;
+}
+
+static void rp1_pll_core_off(struct clk_hw *hw)
+{
+	struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+	struct rp1_clockman *clockman = pll_core->clockman;
+	const struct rp1_pll_core_data *data = pll_core->data;
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->pwr_reg, 0);
+	spin_unlock(&clockman->regs_lock);
+}
+
+static inline unsigned long get_pll_core_divider(struct clk_hw *hw,
+						 unsigned long rate,
+						 unsigned long parent_rate,
+						 u32 *div_int, u32 *div_frac)
+{
+	unsigned long calc_rate;
+	u32 fbdiv_int, fbdiv_frac;
+	u64 div_fp64; /* 32.32 fixed point fraction. */
+
+	/* Factor of reference clock to VCO frequency. */
+	div_fp64 = (u64)(rate) << 32;
+	div_fp64 = DIV_U64_NEAREST(div_fp64, parent_rate);
+
+	/* Round the fractional component at 24 bits. */
+	div_fp64 += 1 << (32 - 24 - 1);
+
+	fbdiv_int = div_fp64 >> 32;
+	fbdiv_frac = (div_fp64 >> (32 - 24)) & 0xffffff;
+
+	calc_rate =
+		((u64)parent_rate * (((u64)fbdiv_int << 24) + fbdiv_frac) + (1 << 23)) >> 24;
+
+	*div_int = fbdiv_int;
+	*div_frac = fbdiv_frac;
+
+	return calc_rate;
+}
+
+static int rp1_pll_core_set_rate(struct clk_hw *hw,
+				 unsigned long rate, unsigned long parent_rate)
+{
+	struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+	struct rp1_clockman *clockman = pll_core->clockman;
+	const struct rp1_pll_core_data *data = pll_core->data;
+	unsigned long calc_rate;
+	u32 fbdiv_int, fbdiv_frac;
+
+	// todo: is this needed??
+	//rp1_pll_off(hw);
+
+	/* Disable dividers to start with. */
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->fbdiv_int_reg, 0);
+	clockman_write(clockman, data->fbdiv_frac_reg, 0);
+	spin_unlock(&clockman->regs_lock);
+
+	calc_rate = get_pll_core_divider(hw, rate, parent_rate,
+					 &fbdiv_int, &fbdiv_frac);
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->pwr_reg, fbdiv_frac ? 0 : PLL_PWR_DSMPD);
+	clockman_write(clockman, data->fbdiv_int_reg, fbdiv_int);
+	clockman_write(clockman, data->fbdiv_frac_reg, fbdiv_frac);
+	spin_unlock(&clockman->regs_lock);
+
+	/* Check that reference frequency is no greater than VCO / 16. */
+	BUG_ON(parent_rate > (rate / 16));
+
+	pll_core->cached_rate = calc_rate;
+
+	spin_lock(&clockman->regs_lock);
+	/* Don't need to divide ref unless parent_rate > (output freq / 16) */
+	clockman_write(clockman, data->cs_reg,
+		       clockman_read(clockman, data->cs_reg) |
+				     (1 << PLL_CS_REFDIV_SHIFT));
+	spin_unlock(&clockman->regs_lock);
+
+	return 0;
+}
+
+static unsigned long rp1_pll_core_recalc_rate(struct clk_hw *hw,
+					      unsigned long parent_rate)
+{
+	struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+	struct rp1_clockman *clockman = pll_core->clockman;
+	const struct rp1_pll_core_data *data = pll_core->data;
+	u32 fbdiv_int, fbdiv_frac;
+	unsigned long calc_rate;
+
+	fbdiv_int = clockman_read(clockman, data->fbdiv_int_reg);
+	fbdiv_frac = clockman_read(clockman, data->fbdiv_frac_reg);
+	calc_rate =
+		((u64)parent_rate * (((u64)fbdiv_int << 24) + fbdiv_frac) + (1 << 23)) >> 24;
+
+	return calc_rate;
+}
+
+static long rp1_pll_core_round_rate(struct clk_hw *hw, unsigned long rate,
+				    unsigned long *parent_rate)
+{
+	u32 fbdiv_int, fbdiv_frac;
+	long calc_rate;
+
+	calc_rate = get_pll_core_divider(hw, rate, *parent_rate,
+					 &fbdiv_int, &fbdiv_frac);
+	return calc_rate;
+}
+
+static void rp1_pll_core_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+	struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+	struct rp1_clockman *clockman = pll_core->clockman;
+	const struct rp1_pll_core_data *data = pll_core->data;
+	struct debugfs_reg32 *regs;
+
+	regs = devm_kcalloc(clockman->dev, 4, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return;
+
+	regs[0].name = "cs";
+	regs[0].offset = data->cs_reg;
+	regs[1].name = "pwr";
+	regs[1].offset = data->pwr_reg;
+	regs[2].name = "fbdiv_int";
+	regs[2].offset = data->fbdiv_int_reg;
+	regs[3].name = "fbdiv_frac";
+	regs[3].offset = data->fbdiv_frac_reg;
+
+	rp1_debugfs_regset(clockman, 0, regs, 4, dentry);
+}
+
+static void get_pll_prim_dividers(unsigned long rate, unsigned long parent_rate,
+				  u32 *divider1, u32 *divider2)
+{
+	unsigned int div1, div2;
+	unsigned int best_div1 = 7, best_div2 = 7;
+	unsigned long best_rate_diff =
+		ABS_DIFF(DIV_ROUND_CLOSEST(parent_rate, best_div1 * best_div2), rate);
+	long rate_diff, calc_rate;
+
+	for (div1 = 1; div1 <= 7; div1++) {
+		for (div2 = 1; div2 <= div1; div2++) {
+			calc_rate = DIV_ROUND_CLOSEST(parent_rate, div1 * div2);
+			rate_diff = ABS_DIFF(calc_rate, rate);
+
+			if (calc_rate == rate) {
+				best_div1 = div1;
+				best_div2 = div2;
+				goto done;
+			} else if (rate_diff < best_rate_diff) {
+				best_div1 = div1;
+				best_div2 = div2;
+				best_rate_diff = rate_diff;
+			}
+		}
+	}
+
+done:
+	*divider1 = best_div1;
+	*divider2 = best_div2;
+}
+
+static int rp1_pll_set_rate(struct clk_hw *hw,
+			    unsigned long rate, unsigned long parent_rate)
+{
+	struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw);
+	struct rp1_clockman *clockman = pll->clockman;
+	const struct rp1_pll_data *data = pll->data;
+	u32 prim, prim_div1, prim_div2;
+
+	get_pll_prim_dividers(rate, parent_rate, &prim_div1, &prim_div2);
+
+	spin_lock(&clockman->regs_lock);
+	prim = clockman_read(clockman, data->ctrl_reg);
+	prim = set_register_field(prim, prim_div1, PLL_PRIM_DIV1_MASK,
+				  PLL_PRIM_DIV1_SHIFT);
+	prim = set_register_field(prim, prim_div2, PLL_PRIM_DIV2_MASK,
+				  PLL_PRIM_DIV2_SHIFT);
+	clockman_write(clockman, data->ctrl_reg, prim);
+	spin_unlock(&clockman->regs_lock);
+
+#ifdef MEASURE_CLOCK_RATE
+	clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static unsigned long rp1_pll_recalc_rate(struct clk_hw *hw,
+					 unsigned long parent_rate)
+{
+	struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw);
+	struct rp1_clockman *clockman = pll->clockman;
+	const struct rp1_pll_data *data = pll->data;
+	u32 prim, prim_div1, prim_div2;
+
+	prim = clockman_read(clockman, data->ctrl_reg);
+	prim_div1 = (prim & PLL_PRIM_DIV1_MASK) >> PLL_PRIM_DIV1_SHIFT;
+	prim_div2 = (prim & PLL_PRIM_DIV2_MASK) >> PLL_PRIM_DIV2_SHIFT;
+
+	if (!prim_div1 || !prim_div2) {
+		dev_err(clockman->dev, "%s: (%s) zero divider value\n",
+			__func__, data->name);
+		return 0;
+	}
+
+	return DIV_ROUND_CLOSEST(parent_rate, prim_div1 * prim_div2);
+}
+
+static long rp1_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+			       unsigned long *parent_rate)
+{
+	u32 div1, div2;
+
+	get_pll_prim_dividers(rate, *parent_rate, &div1, &div2);
+
+	return DIV_ROUND_CLOSEST(*parent_rate, div1 * div2);
+}
+
+static void rp1_pll_debug_init(struct clk_hw *hw,
+			       struct dentry *dentry)
+{
+	struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw);
+	struct rp1_clockman *clockman = pll->clockman;
+	const struct rp1_pll_data *data = pll->data;
+	struct debugfs_reg32 *regs;
+
+	regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return;
+
+	regs[0].name = "prim";
+	regs[0].offset = data->ctrl_reg;
+
+	rp1_debugfs_regset(clockman, 0, regs, 1, dentry);
+}
+
+static int rp1_pll_ph_is_on(struct clk_hw *hw)
+{
+	struct rp1_pll_ph *pll = container_of(hw, struct rp1_pll_ph, hw);
+	struct rp1_clockman *clockman = pll->clockman;
+	const struct rp1_pll_ph_data *data = pll->data;
+
+	return !!(clockman_read(clockman, data->ph_reg) & PLL_PH_EN);
+}
+
+static int rp1_pll_ph_on(struct clk_hw *hw)
+{
+	struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+	struct rp1_clockman *clockman = pll_ph->clockman;
+	const struct rp1_pll_ph_data *data = pll_ph->data;
+	u32 ph_reg;
+
+	/* todo: ensure pri/sec is enabled! */
+	spin_lock(&clockman->regs_lock);
+	ph_reg = clockman_read(clockman, data->ph_reg);
+	ph_reg |= data->phase << PLL_PH_PHASE_SHIFT;
+	ph_reg |= PLL_PH_EN;
+	clockman_write(clockman, data->ph_reg, ph_reg);
+	spin_unlock(&clockman->regs_lock);
+
+#ifdef MEASURE_CLOCK_RATE
+	clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static void rp1_pll_ph_off(struct clk_hw *hw)
+{
+	struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+	struct rp1_clockman *clockman = pll_ph->clockman;
+	const struct rp1_pll_ph_data *data = pll_ph->data;
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->ph_reg,
+		       clockman_read(clockman, data->ph_reg) & ~PLL_PH_EN);
+	spin_unlock(&clockman->regs_lock);
+}
+
+static int rp1_pll_ph_set_rate(struct clk_hw *hw,
+			       unsigned long rate, unsigned long parent_rate)
+{
+	struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+	const struct rp1_pll_ph_data *data = pll_ph->data;
+	struct rp1_clockman *clockman = pll_ph->clockman;
+
+	/* Nothing really to do here! */
+	WARN_ON(data->fixed_divider != 1 && data->fixed_divider != 2);
+	WARN_ON(rate != parent_rate / data->fixed_divider);
+
+#ifdef MEASURE_CLOCK_RATE
+	if (rp1_pll_ph_is_on(hw))
+		clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static unsigned long rp1_pll_ph_recalc_rate(struct clk_hw *hw,
+					    unsigned long parent_rate)
+{
+	struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+	const struct rp1_pll_ph_data *data = pll_ph->data;
+
+	return parent_rate / data->fixed_divider;
+}
+
+static long rp1_pll_ph_round_rate(struct clk_hw *hw, unsigned long rate,
+				  unsigned long *parent_rate)
+{
+	struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+	const struct rp1_pll_ph_data *data = pll_ph->data;
+
+	return *parent_rate / data->fixed_divider;
+}
+
+static void rp1_pll_ph_debug_init(struct clk_hw *hw,
+				  struct dentry *dentry)
+{
+	struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+	const struct rp1_pll_ph_data *data = pll_ph->data;
+	struct rp1_clockman *clockman = pll_ph->clockman;
+	struct debugfs_reg32 *regs;
+
+	regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return;
+
+	regs[0].name = "ph_reg";
+	regs[0].offset = data->ph_reg;
+
+	rp1_debugfs_regset(clockman, 0, regs, 1, dentry);
+}
+
+static int rp1_pll_divider_is_on(struct clk_hw *hw)
+{
+	struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+	struct rp1_clockman *clockman = divider->clockman;
+	const struct rp1_pll_data *data = divider->data;
+
+	return !(clockman_read(clockman, data->ctrl_reg) & PLL_SEC_RST);
+}
+
+static int rp1_pll_divider_on(struct clk_hw *hw)
+{
+	struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+	struct rp1_clockman *clockman = divider->clockman;
+	const struct rp1_pll_data *data = divider->data;
+
+	spin_lock(&clockman->regs_lock);
+	/* Check the implementation bit is set! */
+	WARN_ON(!(clockman_read(clockman, data->ctrl_reg) & PLL_SEC_IMPL));
+	clockman_write(clockman, data->ctrl_reg,
+		       clockman_read(clockman, data->ctrl_reg) & ~PLL_SEC_RST);
+	spin_unlock(&clockman->regs_lock);
+
+#ifdef MEASURE_CLOCK_RATE
+	clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static void rp1_pll_divider_off(struct clk_hw *hw)
+{
+	struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+	struct rp1_clockman *clockman = divider->clockman;
+	const struct rp1_pll_data *data = divider->data;
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->ctrl_reg, PLL_SEC_RST);
+	spin_unlock(&clockman->regs_lock);
+}
+
+static int rp1_pll_divider_set_rate(struct clk_hw *hw,
+				    unsigned long rate,
+				    unsigned long parent_rate)
+{
+	struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+	struct rp1_clockman *clockman = divider->clockman;
+	const struct rp1_pll_data *data = divider->data;
+	u32 div, sec;
+
+	div = DIV_ROUND_UP_ULL(parent_rate, rate);
+	div = clamp(div, 8u, 19u);
+
+	spin_lock(&clockman->regs_lock);
+	sec = clockman_read(clockman, data->ctrl_reg);
+	sec = set_register_field(sec, div, PLL_SEC_DIV_MASK, PLL_SEC_DIV_SHIFT);
+
+	/* Must keep the divider in reset to change the value. */
+	sec |= PLL_SEC_RST;
+	clockman_write(clockman, data->ctrl_reg, sec);
+
+	// todo: must sleep 10 pll vco cycles
+	sec &= ~PLL_SEC_RST;
+	clockman_write(clockman, data->ctrl_reg, sec);
+	spin_unlock(&clockman->regs_lock);
+
+#ifdef MEASURE_CLOCK_RATE
+	if (rp1_pll_divider_is_on(hw))
+		clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static unsigned long rp1_pll_divider_recalc_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	return clk_divider_ops.recalc_rate(hw, parent_rate);
+}
+
+static long rp1_pll_divider_round_rate(struct clk_hw *hw,
+				       unsigned long rate,
+				       unsigned long *parent_rate)
+{
+	return clk_divider_ops.round_rate(hw, rate, parent_rate);
+}
+
+static void rp1_pll_divider_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+	struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+	struct rp1_clockman *clockman = divider->clockman;
+	const struct rp1_pll_data *data = divider->data;
+	struct debugfs_reg32 *regs;
+
+	regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return;
+
+	regs[0].name = "sec";
+	regs[0].offset = data->ctrl_reg;
+
+	rp1_debugfs_regset(clockman, 0, regs, 1, dentry);
+}
+
+static int rp1_clock_is_on(struct clk_hw *hw)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+
+	return !!(clockman_read(clockman, data->ctrl_reg) & CLK_CTRL_ENABLE);
+}
+
+static unsigned long rp1_clock_recalc_rate(struct clk_hw *hw,
+					   unsigned long parent_rate)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+	u64 calc_rate;
+	u64 div;
+
+	u32 frac;
+
+	div = clockman_read(clockman, data->div_int_reg);
+	frac = (data->div_frac_reg != 0) ?
+		clockman_read(clockman, data->div_frac_reg) : 0;
+
+	/* If the integer portion of the divider is 0, treat it as 2^16 */
+	if (!div)
+		div = 1 << 16;
+
+	div = (div << CLK_DIV_FRAC_BITS) | (frac >> (32 - CLK_DIV_FRAC_BITS));
+
+	calc_rate = (u64)parent_rate << CLK_DIV_FRAC_BITS;
+	calc_rate = div64_u64(calc_rate, div);
+
+	return calc_rate;
+}
+
+static int rp1_clock_on(struct clk_hw *hw)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->ctrl_reg,
+		       clockman_read(clockman, data->ctrl_reg) | CLK_CTRL_ENABLE);
+	spin_unlock(&clockman->regs_lock);
+
+#ifdef MEASURE_CLOCK_RATE
+	clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static void rp1_clock_off(struct clk_hw *hw)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+
+	spin_lock(&clockman->regs_lock);
+	clockman_write(clockman, data->ctrl_reg,
+		       clockman_read(clockman, data->ctrl_reg) & ~CLK_CTRL_ENABLE);
+	spin_unlock(&clockman->regs_lock);
+}
+
+static u32 rp1_clock_choose_div(unsigned long rate, unsigned long parent_rate,
+				const struct rp1_clock_data *data)
+{
+	u64 div;
+
+	/*
+	 * Due to earlier rounding, calculated parent_rate may differ from
+	 * expected value. Don't fail on a small discrepancy near unity divide.
+	 */
+	if (!rate || rate > parent_rate + (parent_rate >> CLK_DIV_FRAC_BITS))
+		return 0;
+
+	/*
+	 * Always express div in fixed-point format for fractional division;
+	 * If no fractional divider is present, the fraction part will be zero.
+	 */
+	if (data->div_frac_reg) {
+		div = (u64)parent_rate << CLK_DIV_FRAC_BITS;
+		div = DIV_U64_NEAREST(div, rate);
+	} else {
+		div = DIV_U64_NEAREST(parent_rate, rate);
+		div <<= CLK_DIV_FRAC_BITS;
+	}
+
+	div = clamp(div,
+		    1ull << CLK_DIV_FRAC_BITS,
+		    (u64)data->div_int_max << CLK_DIV_FRAC_BITS);
+
+	return div;
+}
+
+static u8 rp1_clock_get_parent(struct clk_hw *hw)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+	u32 sel, ctrl;
+	u8 parent;
+
+	/* Sel is one-hot, so find the first bit set */
+	sel = clockman_read(clockman, data->sel_reg);
+	parent = ffs(sel) - 1;
+
+	/* sel == 0 implies the parent clock is not enabled yet. */
+	if (!sel) {
+		/* Read the clock src from the CTRL register instead */
+		ctrl = clockman_read(clockman, data->ctrl_reg);
+		parent = (ctrl & data->clk_src_mask) >> CLK_CTRL_SRC_SHIFT;
+	}
+
+	if (parent >= data->num_std_parents)
+		parent = AUX_SEL;
+
+	if (parent == AUX_SEL) {
+		/*
+		 * Clock parent is an auxiliary source, so get the parent from
+		 * the AUXSRC register field.
+		 */
+		ctrl = clockman_read(clockman, data->ctrl_reg);
+		parent = (ctrl & CLK_CTRL_AUXSRC_MASK) >> CLK_CTRL_AUXSRC_SHIFT;
+		parent += data->num_std_parents;
+	}
+
+	return parent;
+}
+
+static int rp1_clock_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+	u32 ctrl, sel;
+
+	spin_lock(&clockman->regs_lock);
+	ctrl = clockman_read(clockman, data->ctrl_reg);
+
+	if (index >= data->num_std_parents) {
+		/* This is an aux source request */
+		if (index >= data->num_std_parents + data->num_aux_parents)
+			return -EINVAL;
+
+		/* Select parent from aux list */
+		ctrl = set_register_field(ctrl, index - data->num_std_parents,
+					  CLK_CTRL_AUXSRC_MASK,
+					  CLK_CTRL_AUXSRC_SHIFT);
+		/* Set src to aux list */
+		ctrl = set_register_field(ctrl, AUX_SEL, data->clk_src_mask,
+					  CLK_CTRL_SRC_SHIFT);
+	} else {
+		ctrl = set_register_field(ctrl, index, data->clk_src_mask,
+					  CLK_CTRL_SRC_SHIFT);
+	}
+
+	clockman_write(clockman, data->ctrl_reg, ctrl);
+	spin_unlock(&clockman->regs_lock);
+
+	sel = rp1_clock_get_parent(hw);
+	WARN(sel != index, "(%s): Parent index req %u returned back %u\n",
+	     data->name, index, sel);
+
+	return 0;
+}
+
+static int rp1_clock_set_rate_and_parent(struct clk_hw *hw,
+					 unsigned long rate,
+					 unsigned long parent_rate,
+					 u8 parent)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+	u32 div = rp1_clock_choose_div(rate, parent_rate, data);
+
+	WARN(rate > 4000000000ll, "rate is -ve (%d)\n", (int)rate);
+
+	if (WARN(!div,
+		 "clk divider calculated as 0! (%s, rate %ld, parent rate %ld)\n",
+		 data->name, rate, parent_rate))
+		div = 1 << CLK_DIV_FRAC_BITS;
+
+	spin_lock(&clockman->regs_lock);
+
+	clockman_write(clockman, data->div_int_reg, div >> CLK_DIV_FRAC_BITS);
+	if (data->div_frac_reg)
+		clockman_write(clockman, data->div_frac_reg, div << (32 - CLK_DIV_FRAC_BITS));
+
+	spin_unlock(&clockman->regs_lock);
+
+	if (parent != 0xff)
+		rp1_clock_set_parent(hw, parent);
+
+#ifdef MEASURE_CLOCK_RATE
+	if (rp1_clock_is_on(hw))
+		clockman_measure_clock(clockman, data->name, data->fc0_src);
+#endif
+	return 0;
+}
+
+static int rp1_clock_set_rate(struct clk_hw *hw, unsigned long rate,
+			      unsigned long parent_rate)
+{
+	return rp1_clock_set_rate_and_parent(hw, rate, parent_rate, 0xff);
+}
+
+static void rp1_clock_choose_div_and_prate(struct clk_hw *hw,
+					   int parent_idx,
+					   unsigned long rate,
+					   unsigned long *prate,
+					   unsigned long *calc_rate)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	const struct rp1_clock_data *data = clock->data;
+	struct clk_hw *parent;
+	u32 div;
+	u64 tmp;
+
+	parent = clk_hw_get_parent_by_index(hw, parent_idx);
+	*prate = clk_hw_get_rate(parent);
+	div = rp1_clock_choose_div(rate, *prate, data);
+
+	if (!div) {
+		*calc_rate = 0;
+		return;
+	}
+
+	/* Recalculate to account for rounding errors */
+	tmp = (u64)*prate << CLK_DIV_FRAC_BITS;
+	tmp = div_u64(tmp, div);
+	*calc_rate = tmp;
+}
+
+static int rp1_clock_determine_rate(struct clk_hw *hw,
+				    struct clk_rate_request *req)
+{
+	struct clk_hw *parent, *best_parent = NULL;
+	unsigned long best_rate = 0;
+	unsigned long best_prate = 0;
+	unsigned long best_rate_diff = ULONG_MAX;
+	unsigned long prate, calc_rate;
+	size_t i;
+
+	/*
+	 * If the NO_REPARENT flag is set, try to use existing parent.
+	 */
+	if ((clk_hw_get_flags(hw) & CLK_SET_RATE_NO_REPARENT)) {
+		i = rp1_clock_get_parent(hw);
+		parent = clk_hw_get_parent_by_index(hw, i);
+		if (parent) {
+			rp1_clock_choose_div_and_prate(hw, i, req->rate, &prate,
+						       &calc_rate);
+			if (calc_rate > 0) {
+				req->best_parent_hw = parent;
+				req->best_parent_rate = prate;
+				req->rate = calc_rate;
+				return 0;
+			}
+		}
+	}
+
+	/*
+	 * Select parent clock that results in the closest rate (lower or
+	 * higher)
+	 */
+	for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
+		parent = clk_hw_get_parent_by_index(hw, i);
+		if (!parent)
+			continue;
+
+		rp1_clock_choose_div_and_prate(hw, i, req->rate, &prate,
+					       &calc_rate);
+
+		if (ABS_DIFF(calc_rate, req->rate) < best_rate_diff) {
+			best_parent = parent;
+			best_prate = prate;
+			best_rate = calc_rate;
+			best_rate_diff = ABS_DIFF(calc_rate, req->rate);
+
+			if (best_rate_diff == 0)
+				break;
+		}
+	}
+
+	if (best_rate == 0)
+		return -EINVAL;
+
+	req->best_parent_hw = best_parent;
+	req->best_parent_rate = best_prate;
+	req->rate = best_rate;
+
+	return 0;
+}
+
+static void rp1_clk_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+	struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+	struct rp1_clockman *clockman = clock->clockman;
+	const struct rp1_clock_data *data = clock->data;
+	struct debugfs_reg32 *regs;
+	int i;
+
+	regs = devm_kcalloc(clockman->dev, 4, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return;
+
+	i = 0;
+	regs[i].name = "ctrl";
+	regs[i++].offset = data->ctrl_reg;
+	regs[i].name = "div_int";
+	regs[i++].offset = data->div_int_reg;
+	regs[i].name = "div_frac";
+	regs[i++].offset = data->div_frac_reg;
+	regs[i].name = "sel";
+	regs[i++].offset = data->sel_reg;
+
+	rp1_debugfs_regset(clockman, 0, regs, i, dentry);
+}
+
+static const struct clk_ops rp1_pll_core_ops = {
+	.is_prepared = rp1_pll_core_is_on,
+	.prepare = rp1_pll_core_on,
+	.unprepare = rp1_pll_core_off,
+	.set_rate = rp1_pll_core_set_rate,
+	.recalc_rate = rp1_pll_core_recalc_rate,
+	.round_rate = rp1_pll_core_round_rate,
+	.debug_init = rp1_pll_core_debug_init,
+};
+
+static const struct clk_ops rp1_pll_ops = {
+	.set_rate = rp1_pll_set_rate,
+	.recalc_rate = rp1_pll_recalc_rate,
+	.round_rate = rp1_pll_round_rate,
+	.debug_init = rp1_pll_debug_init,
+};
+
+static const struct clk_ops rp1_pll_ph_ops = {
+	.is_prepared = rp1_pll_ph_is_on,
+	.prepare = rp1_pll_ph_on,
+	.unprepare = rp1_pll_ph_off,
+	.set_rate = rp1_pll_ph_set_rate,
+	.recalc_rate = rp1_pll_ph_recalc_rate,
+	.round_rate = rp1_pll_ph_round_rate,
+	.debug_init = rp1_pll_ph_debug_init,
+};
+
+static const struct clk_ops rp1_pll_divider_ops = {
+	.is_prepared = rp1_pll_divider_is_on,
+	.prepare = rp1_pll_divider_on,
+	.unprepare = rp1_pll_divider_off,
+	.set_rate = rp1_pll_divider_set_rate,
+	.recalc_rate = rp1_pll_divider_recalc_rate,
+	.round_rate = rp1_pll_divider_round_rate,
+	.debug_init = rp1_pll_divider_debug_init,
+};
+
+static const struct clk_ops rp1_clk_ops = {
+	.is_prepared = rp1_clock_is_on,
+	.prepare = rp1_clock_on,
+	.unprepare = rp1_clock_off,
+	.recalc_rate = rp1_clock_recalc_rate,
+	.get_parent = rp1_clock_get_parent,
+	.set_parent = rp1_clock_set_parent,
+	.set_rate_and_parent = rp1_clock_set_rate_and_parent,
+	.set_rate = rp1_clock_set_rate,
+	.determine_rate = rp1_clock_determine_rate,
+	.debug_init = rp1_clk_debug_init,
+};
+
+static bool rp1_clk_is_claimed(const char *name);
+
+static struct clk_hw *rp1_register_pll_core(struct rp1_clockman *clockman,
+					    const void *data)
+{
+	const struct rp1_pll_core_data *pll_core_data = data;
+	struct rp1_pll_core *pll_core;
+	struct clk_init_data init;
+	int ret;
+
+	memset(&init, 0, sizeof(init));
+
+	/* All of the PLL cores derive from the external oscillator. */
+	init.parent_names = &ref_clock;
+	init.num_parents = 1;
+	init.name = pll_core_data->name;
+	init.ops = &rp1_pll_core_ops;
+	init.flags = pll_core_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL;
+
+	pll_core = kzalloc(sizeof(*pll_core), GFP_KERNEL);
+	if (!pll_core)
+		return NULL;
+
+	pll_core->clockman = clockman;
+	pll_core->data = pll_core_data;
+	pll_core->hw.init = &init;
+
+	ret = devm_clk_hw_register(clockman->dev, &pll_core->hw);
+	if (ret) {
+		kfree(pll_core);
+		return NULL;
+	}
+
+	return &pll_core->hw;
+}
+
+static struct clk_hw *rp1_register_pll(struct rp1_clockman *clockman,
+				       const void *data)
+{
+	const struct rp1_pll_data *pll_data = data;
+	struct rp1_pll *pll;
+	struct clk_init_data init;
+	int ret;
+
+	memset(&init, 0, sizeof(init));
+
+	init.parent_names = &pll_data->source_pll;
+	init.num_parents = 1;
+	init.name = pll_data->name;
+	init.ops = &rp1_pll_ops;
+	init.flags = pll_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL;
+
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return NULL;
+
+	pll->clockman = clockman;
+	pll->data = pll_data;
+	pll->hw.init = &init;
+
+	ret = devm_clk_hw_register(clockman->dev, &pll->hw);
+	if (ret) {
+		kfree(pll);
+		return NULL;
+	}
+
+	return &pll->hw;
+}
+
+static struct clk_hw *rp1_register_pll_ph(struct rp1_clockman *clockman,
+					  const void *data)
+{
+	const struct rp1_pll_ph_data *ph_data = data;
+	struct rp1_pll_ph *ph;
+	struct clk_init_data init;
+	int ret;
+
+	memset(&init, 0, sizeof(init));
+
+	/* All of the PLLs derive from the external oscillator. */
+	init.parent_names = &ph_data->source_pll;
+	init.num_parents = 1;
+	init.name = ph_data->name;
+	init.ops = &rp1_pll_ph_ops;
+	init.flags = ph_data->flags | CLK_IGNORE_UNUSED;
+
+	ph = kzalloc(sizeof(*ph), GFP_KERNEL);
+	if (!ph)
+		return NULL;
+
+	ph->clockman = clockman;
+	ph->data = ph_data;
+	ph->hw.init = &init;
+
+	ret = devm_clk_hw_register(clockman->dev, &ph->hw);
+	if (ret) {
+		kfree(ph);
+		return NULL;
+	}
+
+	return &ph->hw;
+}
+
+static struct clk_hw *rp1_register_pll_divider(struct rp1_clockman *clockman,
+					       const void *data)
+{
+	const struct rp1_pll_data *divider_data = data;
+	struct rp1_pll *divider;
+	struct clk_init_data init;
+	int ret;
+
+	memset(&init, 0, sizeof(init));
+
+	init.parent_names = &divider_data->source_pll;
+	init.num_parents = 1;
+	init.name = divider_data->name;
+	init.ops = &rp1_pll_divider_ops;
+	init.flags = divider_data->flags | CLK_IGNORE_UNUSED;
+
+	divider = devm_kzalloc(clockman->dev, sizeof(*divider), GFP_KERNEL);
+	if (!divider)
+		return NULL;
+
+	divider->div.reg = clockman->regs + divider_data->ctrl_reg;
+	divider->div.shift = PLL_SEC_DIV_SHIFT;
+	divider->div.width = PLL_SEC_DIV_WIDTH;
+	divider->div.flags = CLK_DIVIDER_ROUND_CLOSEST;
+	divider->div.lock = &clockman->regs_lock;
+	divider->div.hw.init = &init;
+	divider->div.table = pll_sec_div_table;
+
+	if (!rp1_clk_is_claimed(divider_data->source_pll))
+		init.flags |= CLK_IS_CRITICAL;
+	if (!rp1_clk_is_claimed(divider_data->name))
+		divider->div.flags |= CLK_IS_CRITICAL;
+
+	divider->clockman = clockman;
+	divider->data = divider_data;
+
+	ret = devm_clk_hw_register(clockman->dev, &divider->div.hw);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return &divider->div.hw;
+}
+
+static struct clk_hw *rp1_register_clock(struct rp1_clockman *clockman,
+					 const void *data)
+{
+	const struct rp1_clock_data *clock_data = data;
+	struct rp1_clock *clock;
+	struct clk_init_data init;
+	int ret;
+
+	BUG_ON(MAX_CLK_PARENTS <
+	       clock_data->num_std_parents + clock_data->num_aux_parents);
+	/* There must be a gap for the AUX selector */
+	BUG_ON((clock_data->num_std_parents > AUX_SEL) &&
+	       strcmp("-", clock_data->parents[AUX_SEL]));
+
+	memset(&init, 0, sizeof(init));
+	init.parent_names = clock_data->parents;
+	init.num_parents =
+		clock_data->num_std_parents + clock_data->num_aux_parents;
+	init.name = clock_data->name;
+	init.flags = clock_data->flags | CLK_IGNORE_UNUSED;
+	init.ops = &rp1_clk_ops;
+
+	clock = devm_kzalloc(clockman->dev, sizeof(*clock), GFP_KERNEL);
+	if (!clock)
+		return NULL;
+
+	clock->clockman = clockman;
+	clock->data = clock_data;
+	clock->hw.init = &init;
+
+	ret = devm_clk_hw_register(clockman->dev, &clock->hw);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return &clock->hw;
+}
+
+struct rp1_clk_desc {
+	struct clk_hw *(*clk_register)(struct rp1_clockman *clockman,
+				       const void *data);
+	const void *data;
+};
+
+/* Assignment helper macros for different clock types. */
+#define _REGISTER(f, ...) { .clk_register = f, .data = __VA_ARGS__ }
+
+#define REGISTER_PLL_CORE(...)	_REGISTER(&rp1_register_pll_core,	\
+					  &(struct rp1_pll_core_data)	\
+					  {__VA_ARGS__})
+
+#define REGISTER_PLL(...)	_REGISTER(&rp1_register_pll,		\
+					  &(struct rp1_pll_data)		\
+					  {__VA_ARGS__})
+
+#define REGISTER_PLL_PH(...)	_REGISTER(&rp1_register_pll_ph,		\
+					  &(struct rp1_pll_ph_data)	\
+					  {__VA_ARGS__})
+
+#define REGISTER_PLL_DIV(...)	_REGISTER(&rp1_register_pll_divider,	\
+					  &(struct rp1_pll_data)	\
+					  {__VA_ARGS__})
+
+#define REGISTER_CLK(...)	_REGISTER(&rp1_register_clock,		\
+					  &(struct rp1_clock_data)	\
+					  {__VA_ARGS__})
+
+static const struct rp1_clk_desc clk_desc_array[] = {
+	[RP1_PLL_SYS_CORE] = REGISTER_PLL_CORE(
+				.name = "pll_sys_core",
+				.cs_reg = PLL_SYS_CS,
+				.pwr_reg = PLL_SYS_PWR,
+				.fbdiv_int_reg = PLL_SYS_FBDIV_INT,
+				.fbdiv_frac_reg = PLL_SYS_FBDIV_FRAC,
+				),
+
+	[RP1_PLL_AUDIO_CORE] = REGISTER_PLL_CORE(
+				.name = "pll_audio_core",
+				.cs_reg = PLL_AUDIO_CS,
+				.pwr_reg = PLL_AUDIO_PWR,
+				.fbdiv_int_reg = PLL_AUDIO_FBDIV_INT,
+				.fbdiv_frac_reg = PLL_AUDIO_FBDIV_FRAC,
+				),
+
+	[RP1_PLL_VIDEO_CORE] = REGISTER_PLL_CORE(
+				.name = "pll_video_core",
+				.cs_reg = PLL_VIDEO_CS,
+				.pwr_reg = PLL_VIDEO_PWR,
+				.fbdiv_int_reg = PLL_VIDEO_FBDIV_INT,
+				.fbdiv_frac_reg = PLL_VIDEO_FBDIV_FRAC,
+				),
+
+	[RP1_PLL_SYS] = REGISTER_PLL(
+				.name = "pll_sys",
+				.source_pll = "pll_sys_core",
+				.ctrl_reg = PLL_SYS_PRIM,
+				.fc0_src = FC_NUM(0, 2),
+				),
+
+	[RP1_PLL_AUDIO] = REGISTER_PLL(
+				.name = "pll_audio",
+				.source_pll = "pll_audio_core",
+				.ctrl_reg = PLL_AUDIO_PRIM,
+				.fc0_src = FC_NUM(4, 2),
+				),
+
+	[RP1_PLL_VIDEO] = REGISTER_PLL(
+				.name = "pll_video",
+				.source_pll = "pll_video_core",
+				.ctrl_reg = PLL_VIDEO_PRIM,
+				.fc0_src = FC_NUM(3, 2),
+				),
+
+	[RP1_PLL_SYS_PRI_PH] = REGISTER_PLL_PH(
+				.name = "pll_sys_pri_ph",
+				.source_pll = "pll_sys",
+				.ph_reg = PLL_SYS_PRIM,
+				.fixed_divider = 2,
+				.phase = RP1_PLL_PHASE_0,
+				.fc0_src = FC_NUM(1, 2),
+				),
+
+	[RP1_PLL_AUDIO_PRI_PH] = REGISTER_PLL_PH(
+				.name = "pll_audio_pri_ph",
+				.source_pll = "pll_audio",
+				.ph_reg = PLL_AUDIO_PRIM,
+				.fixed_divider = 2,
+				.phase = RP1_PLL_PHASE_0,
+				.fc0_src = FC_NUM(5, 1),
+				),
+
+	[RP1_PLL_SYS_SEC] = REGISTER_PLL_DIV(
+				.name = "pll_sys_sec",
+				.source_pll = "pll_sys_core",
+				.ctrl_reg = PLL_SYS_SEC,
+				.fc0_src = FC_NUM(2, 2),
+				),
+
+	[RP1_PLL_AUDIO_SEC] = REGISTER_PLL_DIV(
+				.name = "pll_audio_sec",
+				.source_pll = "pll_audio_core",
+				.ctrl_reg = PLL_AUDIO_SEC,
+				.fc0_src = FC_NUM(6, 2),
+				),
+
+	[RP1_PLL_VIDEO_SEC] = REGISTER_PLL_DIV(
+				.name = "pll_video_sec",
+				.source_pll = "pll_video_core",
+				.ctrl_reg = PLL_VIDEO_SEC,
+				.fc0_src = FC_NUM(5, 3),
+				),
+
+	[RP1_CLK_SYS] = REGISTER_CLK(
+				.name = "clk_sys",
+				.parents = {"xosc", "-", "pll_sys"},
+				.num_std_parents = 3,
+				.num_aux_parents = 0,
+				.ctrl_reg = CLK_SYS_CTRL,
+				.div_int_reg = CLK_SYS_DIV_INT,
+				.sel_reg = CLK_SYS_SEL,
+				.div_int_max = DIV_INT_24BIT_MAX,
+				.fc0_src = FC_NUM(0, 4),
+				.clk_src_mask = 0x3,
+				),
+
+	[RP1_CLK_SLOW_SYS] = REGISTER_CLK(
+				.name = "clk_slow_sys",
+				.parents = {"xosc"},
+				.num_std_parents = 1,
+				.num_aux_parents = 0,
+				.ctrl_reg = CLK_SLOW_SYS_CTRL,
+				.div_int_reg = CLK_SLOW_SYS_DIV_INT,
+				.sel_reg = CLK_SLOW_SYS_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(1, 4),
+				.clk_src_mask = 0x1,
+				),
+
+	[RP1_CLK_UART] = REGISTER_CLK(
+				.name = "clk_uart",
+				.parents = {"pll_sys_pri_ph",
+					    "pll_video",
+					    "xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 3,
+				.ctrl_reg = CLK_UART_CTRL,
+				.div_int_reg = CLK_UART_DIV_INT,
+				.sel_reg = CLK_UART_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(6, 7),
+				),
+
+	[RP1_CLK_ETH] = REGISTER_CLK(
+				.name = "clk_eth",
+				.parents = {"-"},
+				.num_std_parents = 1,
+				.num_aux_parents = 0,
+				.ctrl_reg = CLK_ETH_CTRL,
+				.div_int_reg = CLK_ETH_DIV_INT,
+				.sel_reg = CLK_ETH_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(4, 6),
+				),
+
+	[RP1_CLK_PWM0] = REGISTER_CLK(
+				.name = "clk_pwm0",
+				.parents = {"pll_audio_pri_ph",
+					    "pll_video_sec",
+					    "xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 3,
+				.ctrl_reg = CLK_PWM0_CTRL,
+				.div_int_reg = CLK_PWM0_DIV_INT,
+				.div_frac_reg = CLK_PWM0_DIV_FRAC,
+				.sel_reg = CLK_PWM0_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(0, 5),
+				),
+
+	[RP1_CLK_PWM1] = REGISTER_CLK(
+				.name = "clk_pwm1",
+				.parents = {"pll_audio_pri_ph",
+					    "pll_video_sec",
+					    "xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 3,
+				.ctrl_reg = CLK_PWM1_CTRL,
+				.div_int_reg = CLK_PWM1_DIV_INT,
+				.div_frac_reg = CLK_PWM1_DIV_FRAC,
+				.sel_reg = CLK_PWM1_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(1, 5),
+				),
+
+	[RP1_CLK_AUDIO_IN] = REGISTER_CLK(
+				.name = "clk_audio_in",
+				.parents = {"-"},
+				.num_std_parents = 1,
+				.num_aux_parents = 0,
+				.ctrl_reg = CLK_AUDIO_IN_CTRL,
+				.div_int_reg = CLK_AUDIO_IN_DIV_INT,
+				.sel_reg = CLK_AUDIO_IN_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(2, 5),
+				),
+
+	[RP1_CLK_AUDIO_OUT] = REGISTER_CLK(
+				.name = "clk_audio_out",
+				.parents = {"-"},
+				.num_std_parents = 1,
+				.num_aux_parents = 0,
+				.ctrl_reg = CLK_AUDIO_OUT_CTRL,
+				.div_int_reg = CLK_AUDIO_OUT_DIV_INT,
+				.sel_reg = CLK_AUDIO_OUT_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(3, 5),
+				),
+
+	[RP1_CLK_I2S] = REGISTER_CLK(
+				.name = "clk_i2s",
+				.parents = {"xosc",
+					    "pll_audio",
+					    "pll_audio_sec"},
+				.num_std_parents = 0,
+				.num_aux_parents = 3,
+				.ctrl_reg = CLK_I2S_CTRL,
+				.div_int_reg = CLK_I2S_DIV_INT,
+				.sel_reg = CLK_I2S_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(4, 4),
+				),
+
+	[RP1_CLK_MIPI0_CFG] = REGISTER_CLK(
+				.name = "clk_mipi0_cfg",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_MIPI0_CFG_CTRL,
+				.div_int_reg = CLK_MIPI0_CFG_DIV_INT,
+				.sel_reg = CLK_MIPI0_CFG_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(4, 5),
+				),
+
+	[RP1_CLK_MIPI1_CFG] = REGISTER_CLK(
+				.name = "clk_mipi1_cfg",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_MIPI1_CFG_CTRL,
+				.div_int_reg = CLK_MIPI1_CFG_DIV_INT,
+				.sel_reg = CLK_MIPI1_CFG_SEL,
+				.clk_src_mask = 1,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(5, 6),
+				),
+
+	[RP1_CLK_ETH_TSU] = REGISTER_CLK(
+				.name = "clk_eth_tsu",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_ETH_TSU_CTRL,
+				.div_int_reg = CLK_ETH_TSU_DIV_INT,
+				.sel_reg = CLK_ETH_TSU_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(5, 7),
+				),
+
+	[RP1_CLK_ADC] = REGISTER_CLK(
+				.name = "clk_adc",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_ADC_CTRL,
+				.div_int_reg = CLK_ADC_DIV_INT,
+				.sel_reg = CLK_ADC_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(5, 5),
+				),
+
+	[RP1_CLK_SDIO_TIMER] = REGISTER_CLK(
+				.name = "clk_sdio_timer",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_SDIO_TIMER_CTRL,
+				.div_int_reg = CLK_SDIO_TIMER_DIV_INT,
+				.sel_reg = CLK_SDIO_TIMER_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(3, 4),
+				),
+
+	[RP1_CLK_SDIO_ALT_SRC] = REGISTER_CLK(
+				.name = "clk_sdio_alt_src",
+				.parents = {"pll_sys"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_SDIO_ALT_SRC_CTRL,
+				.div_int_reg = CLK_SDIO_ALT_SRC_DIV_INT,
+				.sel_reg = CLK_SDIO_ALT_SRC_SEL,
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(5, 4),
+				),
+
+	[RP1_CLK_GP0] = REGISTER_CLK(
+				.name = "clk_gp0",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_GP0_CTRL,
+				.div_int_reg = CLK_GP0_DIV_INT,
+				.div_frac_reg = CLK_GP0_DIV_FRAC,
+				.sel_reg = CLK_GP0_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(0, 1),
+				),
+
+	[RP1_CLK_GP1] = REGISTER_CLK(
+				.name = "clk_gp1",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_GP1_CTRL,
+				.div_int_reg = CLK_GP1_DIV_INT,
+				.div_frac_reg = CLK_GP1_DIV_FRAC,
+				.sel_reg = CLK_GP1_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(1, 1),
+				),
+
+	[RP1_CLK_GP2] = REGISTER_CLK(
+				.name = "clk_gp2",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_GP2_CTRL,
+				.div_int_reg = CLK_GP2_DIV_INT,
+				.div_frac_reg = CLK_GP2_DIV_FRAC,
+				.sel_reg = CLK_GP2_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(2, 1),
+				),
+
+	[RP1_CLK_GP3] = REGISTER_CLK(
+				.name = "clk_gp3",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_GP3_CTRL,
+				.div_int_reg = CLK_GP3_DIV_INT,
+				.div_frac_reg = CLK_GP3_DIV_FRAC,
+				.sel_reg = CLK_GP3_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(3, 1),
+				),
+
+	[RP1_CLK_GP4] = REGISTER_CLK(
+				.name = "clk_gp4",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_GP4_CTRL,
+				.div_int_reg = CLK_GP4_DIV_INT,
+				.div_frac_reg = CLK_GP4_DIV_FRAC,
+				.sel_reg = CLK_GP4_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(4, 1),
+				),
+
+	[RP1_CLK_GP5] = REGISTER_CLK(
+				.name = "clk_gp5",
+				.parents = {"xosc"},
+				.num_std_parents = 0,
+				.num_aux_parents = 1,
+				.ctrl_reg = CLK_GP5_CTRL,
+				.div_int_reg = CLK_GP5_DIV_INT,
+				.div_frac_reg = CLK_GP5_DIV_FRAC,
+				.sel_reg = CLK_GP5_SEL,
+				.div_int_max = DIV_INT_16BIT_MAX,
+				.fc0_src = FC_NUM(5, 1),
+				),
+
+	[RP1_CLK_VEC] = REGISTER_CLK(
+				.name = "clk_vec",
+				.parents = {"pll_sys_pri_ph",
+					    "pll_video_sec",
+					    "pll_video",
+					    "clk_gp0",
+					    "clk_gp1",
+					    "clk_gp2",
+					    "clk_gp3",
+					    "clk_gp4"},
+				.num_std_parents = 0,
+				.num_aux_parents = 8, /* XXX in fact there are more than 8 */
+				.ctrl_reg = VIDEO_CLK_VEC_CTRL,
+				.div_int_reg = VIDEO_CLK_VEC_DIV_INT,
+				.sel_reg = VIDEO_CLK_VEC_SEL,
+				.flags = CLK_SET_RATE_NO_REPARENT, /* Let VEC driver set parent */
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(0, 6),
+				),
+
+	[RP1_CLK_DPI] = REGISTER_CLK(
+				.name = "clk_dpi",
+				.parents = {"pll_sys",
+					    "pll_video_sec",
+					    "pll_video",
+					    "clk_gp0",
+					    "clk_gp1",
+					    "clk_gp2",
+					    "clk_gp3",
+					    "clk_gp4"},
+				.num_std_parents = 0,
+				.num_aux_parents = 8, /* XXX in fact there are more than 8 */
+				.ctrl_reg = VIDEO_CLK_DPI_CTRL,
+				.div_int_reg = VIDEO_CLK_DPI_DIV_INT,
+				.sel_reg = VIDEO_CLK_DPI_SEL,
+				.flags = CLK_SET_RATE_NO_REPARENT, /* Let DPI driver set parent */
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(1, 6),
+				),
+
+	[RP1_CLK_MIPI0_DPI] = REGISTER_CLK(
+				.name = "clk_mipi0_dpi",
+				.parents = {"pll_sys",
+					    "pll_video_sec",
+					    "pll_video",
+					    "clksrc_mipi0_dsi_byteclk",
+					    "clk_gp0",
+					    "clk_gp1",
+					    "clk_gp2",
+					    "clk_gp3"},
+				.num_std_parents = 0,
+				.num_aux_parents = 8, /* XXX in fact there are more than 8 */
+				.ctrl_reg = VIDEO_CLK_MIPI0_DPI_CTRL,
+				.div_int_reg = VIDEO_CLK_MIPI0_DPI_DIV_INT,
+				.div_frac_reg = VIDEO_CLK_MIPI0_DPI_DIV_FRAC,
+				.sel_reg = VIDEO_CLK_MIPI0_DPI_SEL,
+				.flags = CLK_SET_RATE_NO_REPARENT, /* Let DSI driver set parent */
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(2, 6),
+				),
+
+	[RP1_CLK_MIPI1_DPI] = REGISTER_CLK(
+				.name = "clk_mipi1_dpi",
+				.parents = {"pll_sys",
+					    "pll_video_sec",
+					    "pll_video",
+					    "clksrc_mipi1_dsi_byteclk",
+					    "clk_gp0",
+					    "clk_gp1",
+					    "clk_gp2",
+					    "clk_gp3"},
+				.num_std_parents = 0,
+				.num_aux_parents = 8, /* XXX in fact there are more than 8 */
+				.ctrl_reg = VIDEO_CLK_MIPI1_DPI_CTRL,
+				.div_int_reg = VIDEO_CLK_MIPI1_DPI_DIV_INT,
+				.div_frac_reg = VIDEO_CLK_MIPI1_DPI_DIV_FRAC,
+				.sel_reg = VIDEO_CLK_MIPI1_DPI_SEL,
+				.flags = CLK_SET_RATE_NO_REPARENT, /* Let DSI driver set parent */
+				.div_int_max = DIV_INT_8BIT_MAX,
+				.fc0_src = FC_NUM(3, 6),
+				),
+};
+
+static bool rp1_clk_claimed[ARRAY_SIZE(clk_desc_array)];
+
+static bool rp1_clk_is_claimed(const char *name)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(clk_desc_array); i++) {
+		if (clk_desc_array[i].data) {
+			const char *clk_name = *(const char **)(clk_desc_array[i].data);
+
+			if (!strcmp(name, clk_name))
+				return rp1_clk_claimed[i];
+		}
+	}
+
+	return false;
+}
+
+static int rp1_clk_probe(struct platform_device *pdev)
+{
+	const struct rp1_clk_desc *desc;
+	struct device *dev = &pdev->dev;
+	struct rp1_clockman *clockman;
+	struct resource *res;
+	struct clk_hw **hws;
+	const size_t asize = ARRAY_SIZE(clk_desc_array);
+	u32 chip_id, platform;
+	unsigned int i;
+	u32 clk_id;
+	int ret;
+
+	clockman = devm_kzalloc(dev, struct_size(clockman, onecell.hws, asize),
+				GFP_KERNEL);
+	if (!clockman)
+		return -ENOMEM;
+
+	rp1_get_platform(&chip_id, &platform);
+
+	spin_lock_init(&clockman->regs_lock);
+	clockman->dev = dev;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	clockman->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(clockman->regs))
+		return PTR_ERR(clockman->regs);
+
+	memset(rp1_clk_claimed, 0, sizeof(rp1_clk_claimed));
+	for (i = 0;
+	     !of_property_read_u32_index(pdev->dev.of_node, "claim-clocks",
+					 i, &clk_id);
+	     i++)
+		rp1_clk_claimed[clk_id] = true;
+
+	platform_set_drvdata(pdev, clockman);
+
+	clockman->onecell.num = asize;
+	hws = clockman->onecell.hws;
+
+	for (i = 0; i < asize; i++) {
+		desc = &clk_desc_array[i];
+		if (desc->clk_register && desc->data)
+			hws[i] = desc->clk_register(clockman, desc->data);
+	}
+
+	ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
+				     &clockman->onecell);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct of_device_id rp1_clk_of_match[] = {
+	{ .compatible = "raspberrypi,rp1-clocks" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rp1_clk_of_match);
+
+static struct platform_driver rp1_clk_driver = {
+	.driver = {
+		.name = "rp1-clk",
+		.of_match_table = rp1_clk_of_match,
+	},
+	.probe = rp1_clk_probe,
+};
+
+static int __init __rp1_clk_driver_init(void)
+{
+	return platform_driver_register(&rp1_clk_driver);
+}
+postcore_initcall(__rp1_clk_driver_init);
+
+MODULE_AUTHOR("Naushir Patuck <naush@raspberrypi.com>");
+MODULE_DESCRIPTION("RP1 clock driver");
+MODULE_LICENSE("GPL");