From 679f68410271a32f200e48b501027f68bd114d5c Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 21 Aug 2019 14:55:56 +0100
Subject: [PATCH] clk-raspberrypi: Also support v3d clock

Signed-off-by: popcornmix <popcornmix@gmail.com>
---
 drivers/clk/bcm/clk-raspberrypi.c | 497 ++++++++++++++++++++++++------
 1 file changed, 408 insertions(+), 89 deletions(-)

--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -15,33 +15,103 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-
+#include <dt-bindings/clock/bcm2835.h>
 #include <soc/bcm2835/raspberrypi-firmware.h>
 
 #define RPI_FIRMWARE_ARM_CLK_ID		0x00000003
+#define RPI_FIRMWARE_V3D_CLK_ID		0x00000005
 
 #define RPI_FIRMWARE_STATE_ENABLE_BIT	BIT(0)
 #define RPI_FIRMWARE_STATE_WAIT_BIT	BIT(1)
 
-/*
- * Even though the firmware interface alters 'pllb' the frequencies are
- * provided as per 'pllb_arm'. We need to scale before passing them trough.
- */
-#define RPI_FIRMWARE_PLLB_ARM_DIV_RATE	2
-
 #define A2W_PLL_FRAC_BITS		20
 
+#define SOC_BCM2835		BIT(0)
+#define SOC_BCM2711		BIT(1)
+#define SOC_ALL			(SOC_BCM2835 | SOC_BCM2711)
+
 struct raspberrypi_clk {
 	struct device *dev;
 	struct rpi_firmware *firmware;
 	struct platform_device *cpufreq;
+};
+
+typedef int (*raspberrypi_clk_register)(struct raspberrypi_clk *rpi,
+					      const void *data);
+
+
+/* assignment helper macros for different clock types */
+#define _REGISTER(f, s, ...) { .clk_register = (raspberrypi_clk_register)f, \
+			       .supported = s,				\
+			       .data = __VA_ARGS__ }
+#define REGISTER_PLL(s, ...)	_REGISTER(&raspberrypi_register_pll,	\
+					  s,				\
+					  &(struct raspberrypi_pll_data)	\
+					  {__VA_ARGS__})
+#define REGISTER_PLL_DIV(s, ...) _REGISTER(&raspberrypi_register_pll_divider, \
+					   s,				  \
+					   &(struct raspberrypi_pll_divider_data) \
+					   {__VA_ARGS__})
+#define REGISTER_CLK(s, ...)	_REGISTER(&raspberrypi_register_clock,	\
+					  s,				\
+					  &(struct raspberrypi_clock_data)	\
+					  {__VA_ARGS__})
+
+
+struct raspberrypi_pll_data {
+	const char *name;
+	const char *const *parents;
+	int num_parents;
+	u32 clock_id;
+};
+
+struct raspberrypi_clock_data {
+	const char *name;
+	const char *const *parents;
+	int num_parents;
+	u32 flags;
+	u32 clock_id;
+};
+
+struct raspberrypi_pll_divider_data {
+	const char *name;
+	const char *divider_name;
+	const char *lookup;
+	const char *source_pll;
+
+	u32 fixed_divider;
+	u32 flags;
+	u32 clock_id;
+};
 
-	unsigned long min_rate;
-	unsigned long max_rate;
+struct raspberrypi_clk_desc {
+	raspberrypi_clk_register clk_register;
+	unsigned int supported;
+	const void *data;
+};
 
-	struct clk_hw pllb;
-	struct clk_hw *pllb_arm;
-	struct clk_lookup *pllb_arm_lookup;
+struct raspberrypi_clock {
+	struct clk_hw hw;
+	struct raspberrypi_clk *rpi;
+	u32 min_rate;
+	u32 max_rate;
+	const struct raspberrypi_clock_data *data;
+};
+
+struct raspberrypi_pll {
+	struct clk_hw hw;
+	struct raspberrypi_clk *rpi;
+	u32 min_rate;
+	u32 max_rate;
+	const struct raspberrypi_pll_data *data;
+};
+
+struct raspberrypi_pll_divider {
+	struct clk_divider div;
+	struct raspberrypi_clk *rpi;
+	u32 min_rate;
+	u32 max_rate;
+	const struct raspberrypi_pll_divider_data *data;
 };
 
 /*
@@ -83,56 +153,49 @@ static int raspberrypi_clock_property(st
 	return 0;
 }
 
-static int raspberrypi_fw_pll_is_on(struct clk_hw *hw)
+static int raspberrypi_fw_is_on(struct raspberrypi_clk *rpi, u32 clock_id, const char *name)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
 	u32 val = 0;
 	int ret;
 
 	ret = raspberrypi_clock_property(rpi->firmware,
 					 RPI_FIRMWARE_GET_CLOCK_STATE,
-					 RPI_FIRMWARE_ARM_CLK_ID, &val);
+					 clock_id, &val);
 	if (ret)
 		return 0;
 
 	return !!(val & RPI_FIRMWARE_STATE_ENABLE_BIT);
 }
 
-
-static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
-						 unsigned long parent_rate)
+static unsigned long raspberrypi_fw_get_rate(struct raspberrypi_clk *rpi,
+						 u32 clock_id, const char *name, unsigned long parent_rate)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
 	u32 val = 0;
 	int ret;
 
 	ret = raspberrypi_clock_property(rpi->firmware,
 					 RPI_FIRMWARE_GET_CLOCK_RATE,
-					 RPI_FIRMWARE_ARM_CLK_ID,
+					 clock_id,
 					 &val);
 	if (ret)
-		return ret;
-
-	return val * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+		dev_err_ratelimited(rpi->dev, "Failed to get %s frequency: %d",
+				    name, ret);
+	return val;
 }
 
-static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
-				       unsigned long parent_rate)
+static int raspberrypi_fw_set_rate(struct raspberrypi_clk *rpi,
+				   u32 clock_id, const char *name, u32 rate,
+				   unsigned long parent_rate)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
-	u32 new_rate = rate / RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
 	int ret;
 
 	ret = raspberrypi_clock_property(rpi->firmware,
 					 RPI_FIRMWARE_SET_CLOCK_RATE,
-					 RPI_FIRMWARE_ARM_CLK_ID,
-					 &new_rate);
+					 clock_id,
+					 &rate);
 	if (ret)
 		dev_err_ratelimited(rpi->dev, "Failed to change %s frequency: %d",
-				    clk_hw_get_name(hw), ret);
+				    name, ret);
 
 	return ret;
 }
@@ -141,16 +204,15 @@ static int raspberrypi_fw_pll_set_rate(s
  * Sadly there is no firmware rate rounding interface. We borrowed it from
  * clk-bcm2835.
  */
-static int raspberrypi_pll_determine_rate(struct clk_hw *hw,
+static int raspberrypi_determine_rate(struct raspberrypi_clk *rpi,
+					  u32 clock_id, const char *name, unsigned long min_rate, unsigned long max_rate,
 					  struct clk_rate_request *req)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
 	u64 div, final_rate;
 	u32 ndiv, fdiv;
 
 	/* We can't use req->rate directly as it would overflow */
-	final_rate = clamp(req->rate, rpi->min_rate, rpi->max_rate);
+	final_rate = clamp(req->rate, min_rate, max_rate);
 
 	div = (u64)final_rate << A2W_PLL_FRAC_BITS;
 	do_div(div, req->best_parent_rate);
@@ -166,6 +228,125 @@ static int raspberrypi_pll_determine_rat
 	return 0;
 }
 
+static int raspberrypi_fw_clock_is_on(struct clk_hw *hw)
+{
+	struct raspberrypi_clock *pll = container_of(hw, struct raspberrypi_clock, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_clock_data *data = pll->data;
+
+	return raspberrypi_fw_is_on(rpi, data->clock_id, data->name);
+}
+
+static unsigned long raspberrypi_fw_clock_get_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	struct raspberrypi_clock *pll = container_of(hw, struct raspberrypi_clock, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_clock_data *data = pll->data;
+
+	return raspberrypi_fw_get_rate(rpi, data->clock_id, data->name, parent_rate);
+}
+
+static int raspberrypi_fw_clock_set_rate(struct clk_hw *hw, unsigned long rate,
+				       unsigned long parent_rate)
+{
+	struct raspberrypi_clock *pll = container_of(hw, struct raspberrypi_clock, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_clock_data *data = pll->data;
+
+	return raspberrypi_fw_set_rate(rpi, data->clock_id, data->name, rate, parent_rate);
+}
+
+static int raspberrypi_clock_determine_rate(struct clk_hw *hw,
+					  struct clk_rate_request *req)
+{
+	struct raspberrypi_clock *pll = container_of(hw, struct raspberrypi_clock, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_clock_data *data = pll->data;
+
+	return raspberrypi_determine_rate(rpi, data->clock_id, data->name, pll->min_rate, pll->max_rate, req);
+}
+
+static int raspberrypi_fw_pll_is_on(struct clk_hw *hw)
+{
+	struct raspberrypi_pll *pll = container_of(hw, struct raspberrypi_pll, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_data *data = pll->data;
+
+	return raspberrypi_fw_is_on(rpi, data->clock_id, data->name);
+}
+
+static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	struct raspberrypi_pll *pll = container_of(hw, struct raspberrypi_pll, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_data *data = pll->data;
+
+	return raspberrypi_fw_get_rate(rpi, data->clock_id, data->name, parent_rate);
+}
+
+static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+				       unsigned long parent_rate)
+{
+	struct raspberrypi_pll *pll = container_of(hw, struct raspberrypi_pll, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_data *data = pll->data;
+
+	return raspberrypi_fw_set_rate(rpi, data->clock_id, data->name, rate, parent_rate);
+}
+
+static int raspberrypi_pll_determine_rate(struct clk_hw *hw,
+					  struct clk_rate_request *req)
+{
+	struct raspberrypi_pll *pll = container_of(hw, struct raspberrypi_pll, hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_data *data = pll->data;
+
+	return raspberrypi_determine_rate(rpi, data->clock_id, data->name, pll->min_rate, pll->max_rate, req);
+}
+
+
+static int raspberrypi_fw_pll_div_is_on(struct clk_hw *hw)
+{
+	struct raspberrypi_pll_divider *pll = container_of(hw, struct raspberrypi_pll_divider, div.hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_divider_data *data = pll->data;
+
+	return raspberrypi_fw_is_on(rpi, data->clock_id, data->name);
+}
+
+static unsigned long raspberrypi_fw_pll_div_get_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	struct raspberrypi_pll_divider *pll = container_of(hw, struct raspberrypi_pll_divider, div.hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_divider_data *data = pll->data;
+
+	return raspberrypi_fw_get_rate(rpi, data->clock_id, data->name, parent_rate);
+}
+
+static int raspberrypi_fw_pll_div_set_rate(struct clk_hw *hw, unsigned long rate,
+				       unsigned long parent_rate)
+{
+	struct raspberrypi_pll_divider *pll = container_of(hw, struct raspberrypi_pll_divider, div.hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_divider_data *data = pll->data;
+
+	return raspberrypi_fw_set_rate(rpi, data->clock_id, data->name, rate, parent_rate);
+}
+
+static int raspberrypi_pll_div_determine_rate(struct clk_hw *hw,
+					  struct clk_rate_request *req)
+{
+	struct raspberrypi_pll_divider *pll = container_of(hw, struct raspberrypi_pll_divider, div.hw);
+	struct raspberrypi_clk *rpi = pll->rpi;
+	const struct raspberrypi_pll_divider_data *data = pll->data;
+
+	return raspberrypi_determine_rate(rpi, data->clock_id, data->name, pll->min_rate, pll->max_rate, req);
+}
+
+
 static const struct clk_ops raspberrypi_firmware_pll_clk_ops = {
 	.is_prepared = raspberrypi_fw_pll_is_on,
 	.recalc_rate = raspberrypi_fw_pll_get_rate,
@@ -173,87 +354,225 @@ static const struct clk_ops raspberrypi_
 	.determine_rate = raspberrypi_pll_determine_rate,
 };
 
-static int raspberrypi_register_pllb(struct raspberrypi_clk *rpi)
+static const struct clk_ops raspberrypi_firmware_pll_divider_clk_ops = {
+	.is_prepared = raspberrypi_fw_pll_div_is_on,
+	.recalc_rate = raspberrypi_fw_pll_div_get_rate,
+	.set_rate = raspberrypi_fw_pll_div_set_rate,
+	.determine_rate = raspberrypi_pll_div_determine_rate,
+};
+
+static const struct clk_ops raspberrypi_firmware_clk_ops = {
+	.is_prepared = raspberrypi_fw_clock_is_on,
+	.recalc_rate = raspberrypi_fw_clock_get_rate,
+	.set_rate = raspberrypi_fw_clock_set_rate,
+	.determine_rate = raspberrypi_clock_determine_rate,
+};
+
+
+static int raspberrypi_get_clock_range(struct raspberrypi_clk *rpi, u32 clock_id, u32 *min_rate, u32 *max_rate)
 {
-	u32 min_rate = 0, max_rate = 0;
+	int ret;
+
+	/* Get min & max rates set by the firmware */
+	ret = raspberrypi_clock_property(rpi->firmware,
+					 RPI_FIRMWARE_GET_MIN_CLOCK_RATE,
+					 clock_id,
+					 min_rate);
+	if (ret) {
+		dev_err(rpi->dev, "Failed to get clock %d min freq: %d (%d)\n",
+			clock_id, *min_rate, ret);
+		return ret;
+	}
+
+	ret = raspberrypi_clock_property(rpi->firmware,
+					 RPI_FIRMWARE_GET_MAX_CLOCK_RATE,
+					 clock_id,
+					 max_rate);
+	if (ret) {
+		dev_err(rpi->dev, "Failed to get clock %d max freq: %d (%d)\n",
+			clock_id, *max_rate, ret);
+		return ret;
+	}
+	return 0;
+}
+
+
+static int raspberrypi_register_pll(struct raspberrypi_clk *rpi,
+					   const struct raspberrypi_pll_data *data)
+{
+	struct raspberrypi_pll *pll;
 	struct clk_init_data init;
 	int ret;
 
 	memset(&init, 0, sizeof(init));
 
 	/* All of the PLLs derive from the external oscillator. */
-	init.parent_names = (const char *[]){ "osc" };
-	init.num_parents = 1;
-	init.name = "pllb";
+	init.parent_names = data->parents;
+	init.num_parents = data->num_parents;
+	init.name = data->name;
 	init.ops = &raspberrypi_firmware_pll_clk_ops;
 	init.flags = CLK_GET_RATE_NOCACHE | CLK_IGNORE_UNUSED;
 
-	/* Get min & max rates set by the firmware */
-	ret = raspberrypi_clock_property(rpi->firmware,
-					 RPI_FIRMWARE_GET_MIN_CLOCK_RATE,
-					 RPI_FIRMWARE_ARM_CLK_ID,
-					 &min_rate);
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return -ENOMEM;
+	pll->rpi = rpi;
+	pll->data = data;
+	pll->hw.init = &init;
+
+	ret = raspberrypi_get_clock_range(rpi, data->clock_id, &pll->min_rate, &pll->max_rate);
 	if (ret) {
-		dev_err(rpi->dev, "Failed to get %s min freq: %d\n",
-			init.name, ret);
+		dev_err(rpi->dev, "%s: raspberrypi_get_clock_range(%s) failed: %d\n", __func__, init.name, ret);
 		return ret;
 	}
 
-	ret = raspberrypi_clock_property(rpi->firmware,
-					 RPI_FIRMWARE_GET_MAX_CLOCK_RATE,
-					 RPI_FIRMWARE_ARM_CLK_ID,
-					 &max_rate);
+	ret = devm_clk_hw_register(rpi->dev, &pll->hw);
 	if (ret) {
-		dev_err(rpi->dev, "Failed to get %s max freq: %d\n",
-			init.name, ret);
+		dev_err(rpi->dev, "%s: devm_clk_hw_register(%s) failed: %d\n", __func__, init.name, ret);
 		return ret;
 	}
+	return 0;
+}
 
-	if (!min_rate || !max_rate) {
-		dev_err(rpi->dev, "Unexpected frequency range: min %u, max %u\n",
-			min_rate, max_rate);
-		return -EINVAL;
-	}
+static int
+raspberrypi_register_pll_divider(struct raspberrypi_clk *rpi,
+			     const struct raspberrypi_pll_divider_data *data)
+{
+	struct raspberrypi_pll_divider *divider;
+	struct clk_init_data init;
+	int ret;
+
+	memset(&init, 0, sizeof(init));
+
+	init.parent_names = &data->source_pll;
+	init.num_parents = 1;
+	init.name = data->name;
+	init.ops = &raspberrypi_firmware_pll_divider_clk_ops;
+	init.flags = data->flags | CLK_IGNORE_UNUSED;
 
-	dev_info(rpi->dev, "CPU frequency range: min %u, max %u\n",
-		 min_rate, max_rate);
+	divider = devm_kzalloc(rpi->dev, sizeof(*divider), GFP_KERNEL);
+	if (!divider)
+		return -ENOMEM;
+
+	divider->div.hw.init = &init;
+	divider->rpi = rpi;
+	divider->data = data;
+
+	ret = raspberrypi_get_clock_range(rpi, data->clock_id, &divider->min_rate, &divider->max_rate);
+	if (ret) {
+		dev_err(rpi->dev, "%s: raspberrypi_get_clock_range(%s) failed: %d\n", __func__, init.name, ret);
+		return ret;
+	}
 
-	rpi->min_rate = min_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
-	rpi->max_rate = max_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+	ret = devm_clk_hw_register(rpi->dev, &divider->div.hw);
+	if (ret) {
+		dev_err(rpi->dev, "%s: devm_clk_hw_register(%s) failed: %d\n", __func__, init.name, ret);
+		return ret;
+	}
 
-	rpi->pllb.init = &init;
+	/*
+	 * PLLH's channels have a fixed divide by 10 afterwards, which
+	 * is what our consumers are actually using.
+	 */
+	if (data->fixed_divider != 1) {
+		struct clk_lookup *lookup;
+		struct clk_hw *clk = clk_hw_register_fixed_factor(rpi->dev,
+						    data->divider_name,
+						    data->name,
+						    CLK_SET_RATE_PARENT,
+						    1,
+						    data->fixed_divider);
+		if (IS_ERR(clk)) {
+			dev_err(rpi->dev, "%s: clk_hw_register_fixed_factor(%s) failed: %ld\n", __func__, init.name, PTR_ERR(clk));
+			return PTR_ERR(clk);
+		}
+		if (data->lookup) {
+			lookup = clkdev_hw_create(clk, NULL, data->lookup);
+			if (IS_ERR(lookup)) {
+				dev_err(rpi->dev, "%s: clk_hw_register_fixed_factor(%s) failed: %ld\n", __func__, init.name, PTR_ERR(lookup));
+				return PTR_ERR(lookup);
+			}
+		}
+	}
 
-	return devm_clk_hw_register(rpi->dev, &rpi->pllb);
+	return 0;
 }
 
-static int raspberrypi_register_pllb_arm(struct raspberrypi_clk *rpi)
+static int raspberrypi_register_clock(struct raspberrypi_clk *rpi,
+					  const struct raspberrypi_clock_data *data)
 {
-	rpi->pllb_arm = clk_hw_register_fixed_factor(rpi->dev,
-				"pllb_arm", "pllb",
-				CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,
-				1, 2);
-	if (IS_ERR(rpi->pllb_arm)) {
-		dev_err(rpi->dev, "Failed to initialize pllb_arm\n");
-		return PTR_ERR(rpi->pllb_arm);
-	}
+	struct raspberrypi_clock *clock;
+	struct clk_init_data init;
+	struct clk *clk;
+	int ret;
+
+	memset(&init, 0, sizeof(init));
+	init.parent_names = data->parents;
+	init.num_parents = data->num_parents;
+	init.name = data->name;
+	init.flags = data->flags | CLK_IGNORE_UNUSED;
 
-	rpi->pllb_arm_lookup = clkdev_hw_create(rpi->pllb_arm, NULL, "cpu0");
-	if (!rpi->pllb_arm_lookup) {
-		dev_err(rpi->dev, "Failed to initialize pllb_arm_lookup\n");
-		clk_hw_unregister_fixed_factor(rpi->pllb_arm);
+	init.ops = &raspberrypi_firmware_clk_ops;
+
+	clock = devm_kzalloc(rpi->dev, sizeof(*clock), GFP_KERNEL);
+	if (!clock)
 		return -ENOMEM;
-	}
 
+	clock->rpi = rpi;
+	clock->data = data;
+	clock->hw.init = &init;
+
+	ret = raspberrypi_get_clock_range(rpi, data->clock_id, &clock->min_rate, &clock->max_rate);
+	if (ret) {
+		dev_err(rpi->dev, "%s: raspberrypi_get_clock_range(%s) failed: %d\n", __func__, init.name, ret);
+		return ret;
+	}
+	clk = devm_clk_register(rpi->dev, &clock->hw);
+	if (IS_ERR(clk)) {
+		dev_err(rpi->dev, "%s: devm_clk_register(%s) failed: %ld\n", __func__, init.name, PTR_ERR(clk));
+		return PTR_ERR(clk);
+	}
+	ret = clk_register_clkdev(clk, init.name, NULL);
+	if (ret) {
+		dev_err(rpi->dev, "%s: clk_register_clkdev(%s) failed: %d\n", __func__, init.name, ret);
+		return ret;
+	}
 	return 0;
 }
 
+
+/*
+ * the real definition of all the pll, pll_dividers and clocks
+ * these make use of the above REGISTER_* macros
+ */
+static const struct raspberrypi_clk_desc clk_desc_array[] = {
+	/* the PLL + PLL dividers */
+	[BCM2835_CLOCK_V3D]     = REGISTER_CLK(
+		SOC_ALL,
+		.name = "v3d",
+		.parents = (const char *[]){ "osc" },
+		.num_parents = 1,
+		.clock_id = RPI_FIRMWARE_V3D_CLK_ID),
+	[BCM2835_PLLB_ARM]      = REGISTER_PLL_DIV(
+		SOC_ALL,
+		.name = "pllb",
+		.source_pll = "osc",
+		.divider_name = "pllb_arm",
+		.lookup = "cpu0",
+		.fixed_divider = 2,
+		.clock_id = RPI_FIRMWARE_ARM_CLK_ID,
+		.flags = CLK_SET_RATE_PARENT),
+};
+
 static int raspberrypi_clk_probe(struct platform_device *pdev)
 {
 	struct device_node *firmware_node;
 	struct device *dev = &pdev->dev;
 	struct rpi_firmware *firmware;
 	struct raspberrypi_clk *rpi;
-	int ret;
+	const struct raspberrypi_clk_desc *desc;
+	const size_t asize = ARRAY_SIZE(clk_desc_array);
+	int i;
 
 	firmware_node = of_find_compatible_node(NULL, NULL,
 					"raspberrypi,bcm2835-firmware");
@@ -275,16 +594,16 @@ static int raspberrypi_clk_probe(struct
 	rpi->firmware = firmware;
 	platform_set_drvdata(pdev, rpi);
 
-	ret = raspberrypi_register_pllb(rpi);
-	if (ret) {
-		dev_err(dev, "Failed to initialize pllb, %d\n", ret);
-		return ret;
+	for (i = 0; i < asize; i++) {
+		desc = &clk_desc_array[i];
+		if (desc->clk_register && desc->data /*&&
+		    (desc->supported & pdata->soc)*/) {
+			int ret = desc->clk_register(rpi, desc->data);
+			if (ret)
+				return ret;
+		}
 	}
 
-	ret = raspberrypi_register_pllb_arm(rpi);
-	if (ret)
-		return ret;
-
 	rpi->cpufreq = platform_device_register_data(dev, "raspberrypi-cpufreq",
 						     -1, NULL, 0);