drivers/clk/mvebu/cp110-system-controller.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Marvell Armada CP110 System Controller
  *
  * Copyright (C) 2016 Marvell
  *
  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  *
  */

 /*
  * CP110 has 6 core clocks:
  *
  *  - PLL0		(1 Ghz)
  *    - PPv2 core	(1/3 PLL0)
  *    - x2 Core		(1/2 PLL0)
  *	- Core		(1/2 x2 Core)
  *    - SDIO		(2/5 PLL0)
  *
  *  - NAND clock, which is either:
  *    - Equal to SDIO clock
  *    - 2/5 PLL0
  *
  * CP110 has 32 gatable clocks, for the various peripherals in the IP.
  */

 #define pr_fmt(fmt) "cp110-system-controller: " fmt

 #include <linux/clk-provider.h>
 #include <linux/mfd/syscon.h>
 #include <linux/init.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>

 #define CP110_PM_CLOCK_GATING_REG	0x220
 #define CP110_NAND_FLASH_CLK_CTRL_REG	0x700
 #define    NF_CLOCK_SEL_400_MASK	BIT(0)

 enum {
 	CP110_CLK_TYPE_CORE,
 	CP110_CLK_TYPE_GATABLE,
 };

 #define CP110_MAX_CORE_CLOCKS		6
 #define CP110_MAX_GATABLE_CLOCKS	32

 #define CP110_CLK_NUM \
 	(CP110_MAX_CORE_CLOCKS + CP110_MAX_GATABLE_CLOCKS)

 #define CP110_CORE_PLL0			0
 #define CP110_CORE_PPV2			1
 #define CP110_CORE_X2CORE		2
 #define CP110_CORE_CORE			3
 #define CP110_CORE_NAND			4
 #define CP110_CORE_SDIO			5

 /* A number of gatable clocks need special handling */
 #define CP110_GATE_AUDIO		0
 #define CP110_GATE_COMM_UNIT		1
 #define CP110_GATE_NAND			2
 #define CP110_GATE_PPV2			3
 #define CP110_GATE_SDIO			4
 #define CP110_GATE_MG			5
 #define CP110_GATE_MG_CORE		6
 #define CP110_GATE_XOR1			7
 #define CP110_GATE_XOR0			8
 #define CP110_GATE_GOP_DP		9
 #define CP110_GATE_PCIE_X1_0		11
 #define CP110_GATE_PCIE_X1_1		12
 #define CP110_GATE_PCIE_X4		13
 #define CP110_GATE_PCIE_XOR		14
 #define CP110_GATE_SATA			15
 #define CP110_GATE_SATA_USB		16
 #define CP110_GATE_MAIN			17
 #define CP110_GATE_SDMMC_GOP		18
 #define CP110_GATE_SLOW_IO		21
 #define CP110_GATE_USB3H0		22
 #define CP110_GATE_USB3H1		23
 #define CP110_GATE_USB3DEV		24
 #define CP110_GATE_EIP150		25
 #define CP110_GATE_EIP197		26

 static const char * const gate_base_names[] = {
 	[CP110_GATE_AUDIO]	= "audio",
 	[CP110_GATE_COMM_UNIT]	= "communit",
 	[CP110_GATE_NAND]	= "nand",
 	[CP110_GATE_PPV2]	= "ppv2",
 	[CP110_GATE_SDIO]	= "sdio",
 	[CP110_GATE_MG]		= "mg-domain",
 	[CP110_GATE_MG_CORE]	= "mg-core",
 	[CP110_GATE_XOR1]	= "xor1",
 	[CP110_GATE_XOR0]	= "xor0",
 	[CP110_GATE_GOP_DP]	= "gop-dp",
 	[CP110_GATE_PCIE_X1_0]	= "pcie_x10",
 	[CP110_GATE_PCIE_X1_1]	= "pcie_x11",
 	[CP110_GATE_PCIE_X4]	= "pcie_x4",
 	[CP110_GATE_PCIE_XOR]	= "pcie-xor",
 	[CP110_GATE_SATA]	= "sata",
 	[CP110_GATE_SATA_USB]	= "sata-usb",
 	[CP110_GATE_MAIN]	= "main",
 	[CP110_GATE_SDMMC_GOP]	= "sd-mmc-gop",
 	[CP110_GATE_SLOW_IO]	= "slow-io",
 	[CP110_GATE_USB3H0]	= "usb3h0",
 	[CP110_GATE_USB3H1]	= "usb3h1",
 	[CP110_GATE_USB3DEV]	= "usb3dev",
 	[CP110_GATE_EIP150]	= "eip150",
 	[CP110_GATE_EIP197]	= "eip197"
 };

 struct cp110_gate_clk {
 	struct clk_hw hw;
 	struct regmap *regmap;
 	u8 bit_idx;
 };

 #define to_cp110_gate_clk(hw) container_of(hw, struct cp110_gate_clk, hw)

 static int cp110_gate_enable(struct clk_hw *hw)
 {
 	struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);

 	regmap_update_bits(gate->regmap, CP110_PM_CLOCK_GATING_REG,
 			   BIT(gate->bit_idx), BIT(gate->bit_idx));

 	return 0;
 }

 static void cp110_gate_disable(struct clk_hw *hw)
 {
 	struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);

 	regmap_update_bits(gate->regmap, CP110_PM_CLOCK_GATING_REG,
 			   BIT(gate->bit_idx), 0);
 }

 static int cp110_gate_is_enabled(struct clk_hw *hw)
 {
 	struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);
 	u32 val;

 	regmap_read(gate->regmap, CP110_PM_CLOCK_GATING_REG, &val);

 	return val & BIT(gate->bit_idx);
 }

 static const struct clk_ops cp110_gate_ops = {
 	.enable = cp110_gate_enable,
 	.disable = cp110_gate_disable,
 	.is_enabled = cp110_gate_is_enabled,
 };

 static struct clk_hw *cp110_register_gate(const char *name,
 					  const char *parent_name,
 					  struct regmap *regmap, u8 bit_idx)
 {
 	struct cp110_gate_clk *gate;
 	struct clk_hw *hw;
 	struct clk_init_data init;
 	int ret;

 	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
 	if (!gate)
 		return ERR_PTR(-ENOMEM);

 	memset(&init, 0, sizeof(init));

 	init.name = name;
 	init.ops = &cp110_gate_ops;
 	init.parent_names = &parent_name;
 	init.num_parents = 1;

 	gate->regmap = regmap;
 	gate->bit_idx = bit_idx;
 	gate->hw.init = &init;

 	hw = &gate->hw;
 	ret = clk_hw_register(NULL, hw);
 	if (ret) {
 		kfree(gate);
 		hw = ERR_PTR(ret);
 	}

 	return hw;
 }

 static void cp110_unregister_gate(struct clk_hw *hw)
 {
 	clk_hw_unregister(hw);
 	kfree(to_cp110_gate_clk(hw));
 }

 static struct clk_hw *cp110_of_clk_get(struct of_phandle_args *clkspec,
 				       void *data)
 {
 	struct clk_hw_onecell_data *clk_data = data;
 	unsigned int type = clkspec->args[0];
 	unsigned int idx = clkspec->args[1];

 	if (type == CP110_CLK_TYPE_CORE) {
 		if (idx >= CP110_MAX_CORE_CLOCKS)
 			return ERR_PTR(-EINVAL);
 		return clk_data->hws[idx];
 	} else if (type == CP110_CLK_TYPE_GATABLE) {
 		if (idx >= CP110_MAX_GATABLE_CLOCKS)
 			return ERR_PTR(-EINVAL);
 		return clk_data->hws[CP110_MAX_CORE_CLOCKS + idx];
 	}

 	return ERR_PTR(-EINVAL);
 }

 static char *cp110_unique_name(struct device *dev, struct device_node *np,
 			       const char *name)
 {
 	const __be32 *reg;
 	u64 addr;

 	/* Do not create a name if there is no clock */
 	if (!name)
 		return NULL;

 	reg = of_get_property(np, "reg", NULL);
 	addr = of_translate_address(np, reg);
 	return devm_kasprintf(dev, GFP_KERNEL, "%llx-%s",
 			      (unsigned long long)addr, name);
 }

 static int cp110_syscon_common_probe(struct platform_device *pdev,
 				     struct device_node *syscon_node)
 {
 	struct regmap *regmap;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	const char *ppv2_name, *pll0_name, *core_name, *x2core_name, *nand_name,
 		*sdio_name;
 	struct clk_hw_onecell_data *cp110_clk_data;
 	struct clk_hw *hw, **cp110_clks;
 	u32 nand_clk_ctrl;
 	int i, ret;
 	char *gate_name[ARRAY_SIZE(gate_base_names)];

 	regmap = syscon_node_to_regmap(syscon_node);
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);

 	ret = regmap_read(regmap, CP110_NAND_FLASH_CLK_CTRL_REG,
 			  &nand_clk_ctrl);
 	if (ret)
 		return ret;

 	cp110_clk_data = devm_kzalloc(dev, sizeof(*cp110_clk_data) +
 				      sizeof(struct clk_hw *) * CP110_CLK_NUM,
 				      GFP_KERNEL);
 	if (!cp110_clk_data)
 		return -ENOMEM;

 	cp110_clks = cp110_clk_data->hws;
 	cp110_clk_data->num = CP110_CLK_NUM;

 	/* Register the PLL0 which is the root of the hw tree */
 	pll0_name = cp110_unique_name(dev, syscon_node, "pll0");
 	hw = clk_hw_register_fixed_rate(NULL, pll0_name, NULL, 0,
 					1000 * 1000 * 1000);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto fail_pll0;
 	}

 	cp110_clks[CP110_CORE_PLL0] = hw;

 	/* PPv2 is PLL0/3 */
 	ppv2_name = cp110_unique_name(dev, syscon_node, "ppv2-core");
 	hw = clk_hw_register_fixed_factor(NULL, ppv2_name, pll0_name, 0, 1, 3);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto fail_ppv2;
 	}

 	cp110_clks[CP110_CORE_PPV2] = hw;

 	/* X2CORE clock is PLL0/2 */
 	x2core_name = cp110_unique_name(dev, syscon_node, "x2core");
 	hw = clk_hw_register_fixed_factor(NULL, x2core_name, pll0_name,
 					  0, 1, 2);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto fail_eip;
 	}

 	cp110_clks[CP110_CORE_X2CORE] = hw;

 	/* Core clock is X2CORE/2 */
 	core_name = cp110_unique_name(dev, syscon_node, "core");
 	hw = clk_hw_register_fixed_factor(NULL, core_name, x2core_name,
 					  0, 1, 2);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto fail_core;
 	}

 	cp110_clks[CP110_CORE_CORE] = hw;
 	/* NAND can be either PLL0/2.5 or core clock */
 	nand_name = cp110_unique_name(dev, syscon_node, "nand-core");
 	if (nand_clk_ctrl & NF_CLOCK_SEL_400_MASK)
 		hw = clk_hw_register_fixed_factor(NULL, nand_name,
 						   pll0_name, 0, 2, 5);
 	else
 		hw = clk_hw_register_fixed_factor(NULL, nand_name,
 						   core_name, 0, 1, 1);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto fail_nand;
 	}

 	cp110_clks[CP110_CORE_NAND] = hw;

 	/* SDIO clock is PLL0/2.5 */
 	sdio_name = cp110_unique_name(dev, syscon_node, "sdio-core");
 	hw = clk_hw_register_fixed_factor(NULL, sdio_name,
 					  pll0_name, 0, 2, 5);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto fail_sdio;
 	}

 	cp110_clks[CP110_CORE_SDIO] = hw;

 	/* create the unique name for all the gate clocks */
 	for (i = 0; i < ARRAY_SIZE(gate_base_names); i++)
 		gate_name[i] =	cp110_unique_name(dev, syscon_node,
 						  gate_base_names[i]);

 	for (i = 0; i < ARRAY_SIZE(gate_base_names); i++) {
 		const char *parent;

 		if (gate_name[i] == NULL)
 			continue;

 		switch (i) {
 		case CP110_GATE_NAND:
 			parent = nand_name;
 			break;
 		case CP110_GATE_MG:
 		case CP110_GATE_GOP_DP:
 		case CP110_GATE_PPV2:
 			parent = ppv2_name;
 			break;
 		case CP110_GATE_SDIO:
 			parent = sdio_name;
 			break;
 		case CP110_GATE_MAIN:
 		case CP110_GATE_PCIE_XOR:
 		case CP110_GATE_PCIE_X4:
 		case CP110_GATE_EIP150:
 		case CP110_GATE_EIP197:
 			parent = x2core_name;
 			break;
 		default:
 			parent = core_name;
 			break;
 		}
 		hw = cp110_register_gate(gate_name[i], parent, regmap, i);

 		if (IS_ERR(hw)) {
 			ret = PTR_ERR(hw);
 			goto fail_gate;
 		}

 		cp110_clks[CP110_MAX_CORE_CLOCKS + i] = hw;
 	}

 	ret = of_clk_add_hw_provider(np, cp110_of_clk_get, cp110_clk_data);
 	if (ret)
 		goto fail_clk_add;

 	platform_set_drvdata(pdev, cp110_clks);

 	return 0;

 fail_clk_add:
 fail_gate:
 	for (i = 0; i < CP110_MAX_GATABLE_CLOCKS; i++) {
 		hw = cp110_clks[CP110_MAX_CORE_CLOCKS + i];

 		if (hw)
 			cp110_unregister_gate(hw);
 	}

 	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_SDIO]);
 fail_sdio:
 	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_NAND]);
 fail_nand:
 	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_CORE]);
 fail_core:
 	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_X2CORE]);
 fail_eip:
 	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_PPV2]);
 fail_ppv2:
 	clk_hw_unregister_fixed_rate(cp110_clks[CP110_CORE_PLL0]);
 fail_pll0:
 	return ret;
 }

 static int cp110_syscon_legacy_clk_probe(struct platform_device *pdev)
 {
 	dev_warn(&pdev->dev, FW_WARN "Using legacy device tree binding\n");
 	dev_warn(&pdev->dev, FW_WARN "Update your device tree:\n");
 	dev_warn(&pdev->dev, FW_WARN
 		 "This binding won't be supported in future kernels\n");

 	return cp110_syscon_common_probe(pdev, pdev->dev.of_node);
 }

 static int cp110_clk_probe(struct platform_device *pdev)
 {
 	return cp110_syscon_common_probe(pdev, pdev->dev.of_node->parent);
 }

 static const struct of_device_id cp110_syscon_legacy_of_match[] = {
 	{ .compatible = "marvell,cp110-system-controller0", },
 	{ }
 };

 static struct platform_driver cp110_syscon_legacy_driver = {
 	.probe = cp110_syscon_legacy_clk_probe,
 	.driver		= {
 		.name	= "marvell-cp110-system-controller0",
 		.of_match_table = cp110_syscon_legacy_of_match,
 		.suppress_bind_attrs = true,
 	},
 };
 builtin_platform_driver(cp110_syscon_legacy_driver);

 static const struct of_device_id cp110_clock_of_match[] = {
 	{ .compatible = "marvell,cp110-clock", },
 	{ }
 };

 static struct platform_driver cp110_clock_driver = {
 	.probe = cp110_clk_probe,
 	.driver		= {
 		.name	= "marvell-cp110-clock",
 		.of_match_table = cp110_clock_of_match,
 		.suppress_bind_attrs = true,
 	},
 };
 builtin_platform_driver(cp110_clock_driver);
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Marvell Armada CP110 System Controller
	*
	* Copyright (C) 2016 Marvell
	*
	* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
	*
	*/

	/*
	* CP110 has 6 core clocks:
	*
	* - PLL0 (1 Ghz)
	* - PPv2 core (1/3 PLL0)
	* - x2 Core (1/2 PLL0)
	* - Core (1/2 x2 Core)
	* - SDIO (2/5 PLL0)
	*
	* - NAND clock, which is either:
	* - Equal to SDIO clock
	* - 2/5 PLL0
	*
	* CP110 has 32 gatable clocks, for the various peripherals in the IP.
	*/

	#define pr_fmt(fmt) "cp110-system-controller: " fmt

	#include <linux/clk-provider.h>
	#include <linux/mfd/syscon.h>
	#include <linux/init.h>
	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/platform_device.h>
	#include <linux/regmap.h>
	#include <linux/slab.h>

	#define CP110_PM_CLOCK_GATING_REG 0x220
	#define CP110_NAND_FLASH_CLK_CTRL_REG 0x700
	#define NF_CLOCK_SEL_400_MASK BIT(0)

	enum {
	CP110_CLK_TYPE_CORE,
	CP110_CLK_TYPE_GATABLE,
	};

	#define CP110_MAX_CORE_CLOCKS 6
	#define CP110_MAX_GATABLE_CLOCKS 32

	#define CP110_CLK_NUM \
	(CP110_MAX_CORE_CLOCKS + CP110_MAX_GATABLE_CLOCKS)

	#define CP110_CORE_PLL0 0
	#define CP110_CORE_PPV2 1
	#define CP110_CORE_X2CORE 2
	#define CP110_CORE_CORE 3
	#define CP110_CORE_NAND 4
	#define CP110_CORE_SDIO 5

	/* A number of gatable clocks need special handling */
	#define CP110_GATE_AUDIO 0
	#define CP110_GATE_COMM_UNIT 1
	#define CP110_GATE_NAND 2
	#define CP110_GATE_PPV2 3
	#define CP110_GATE_SDIO 4
	#define CP110_GATE_MG 5
	#define CP110_GATE_MG_CORE 6
	#define CP110_GATE_XOR1 7
	#define CP110_GATE_XOR0 8
	#define CP110_GATE_GOP_DP 9
	#define CP110_GATE_PCIE_X1_0 11
	#define CP110_GATE_PCIE_X1_1 12
	#define CP110_GATE_PCIE_X4 13
	#define CP110_GATE_PCIE_XOR 14
	#define CP110_GATE_SATA 15
	#define CP110_GATE_SATA_USB 16
	#define CP110_GATE_MAIN 17
	#define CP110_GATE_SDMMC_GOP 18
	#define CP110_GATE_SLOW_IO 21
	#define CP110_GATE_USB3H0 22
	#define CP110_GATE_USB3H1 23
	#define CP110_GATE_USB3DEV 24
	#define CP110_GATE_EIP150 25
	#define CP110_GATE_EIP197 26

	static const char * const gate_base_names[] = {
	[CP110_GATE_AUDIO] = "audio",
	[CP110_GATE_COMM_UNIT] = "communit",
	[CP110_GATE_NAND] = "nand",
	[CP110_GATE_PPV2] = "ppv2",
	[CP110_GATE_SDIO] = "sdio",
	[CP110_GATE_MG] = "mg-domain",
	[CP110_GATE_MG_CORE] = "mg-core",
	[CP110_GATE_XOR1] = "xor1",
	[CP110_GATE_XOR0] = "xor0",
	[CP110_GATE_GOP_DP] = "gop-dp",
	[CP110_GATE_PCIE_X1_0] = "pcie_x10",
	[CP110_GATE_PCIE_X1_1] = "pcie_x11",
	[CP110_GATE_PCIE_X4] = "pcie_x4",
	[CP110_GATE_PCIE_XOR] = "pcie-xor",
	[CP110_GATE_SATA] = "sata",
	[CP110_GATE_SATA_USB] = "sata-usb",
	[CP110_GATE_MAIN] = "main",
	[CP110_GATE_SDMMC_GOP] = "sd-mmc-gop",
	[CP110_GATE_SLOW_IO] = "slow-io",
	[CP110_GATE_USB3H0] = "usb3h0",
	[CP110_GATE_USB3H1] = "usb3h1",
	[CP110_GATE_USB3DEV] = "usb3dev",
	[CP110_GATE_EIP150] = "eip150",
	[CP110_GATE_EIP197] = "eip197"
	};

	struct cp110_gate_clk {
	struct clk_hw hw;
	struct regmap *regmap;
	u8 bit_idx;
	};

	#define to_cp110_gate_clk(hw) container_of(hw, struct cp110_gate_clk, hw)

	static int cp110_gate_enable(struct clk_hw *hw)
	{
	struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);

	regmap_update_bits(gate->regmap, CP110_PM_CLOCK_GATING_REG,
	BIT(gate->bit_idx), BIT(gate->bit_idx));

	return 0;
	}

	static void cp110_gate_disable(struct clk_hw *hw)
	{
	struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);

	regmap_update_bits(gate->regmap, CP110_PM_CLOCK_GATING_REG,
	BIT(gate->bit_idx), 0);
	}

	static int cp110_gate_is_enabled(struct clk_hw *hw)
	{
	struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);
	u32 val;

	regmap_read(gate->regmap, CP110_PM_CLOCK_GATING_REG, &val);

	return val & BIT(gate->bit_idx);
	}

	static const struct clk_ops cp110_gate_ops = {
	.enable = cp110_gate_enable,
	.disable = cp110_gate_disable,
	.is_enabled = cp110_gate_is_enabled,
	};

	static struct clk_hw cp110_register_gate(const char name,
	const char *parent_name,
	struct regmap *regmap, u8 bit_idx)
	{
	struct cp110_gate_clk *gate;
	struct clk_hw *hw;
	struct clk_init_data init;
	int ret;

	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
	if (!gate)
	return ERR_PTR(-ENOMEM);

	memset(&init, 0, sizeof(init));

	init.name = name;
	init.ops = &cp110_gate_ops;
	init.parent_names = &parent_name;
	init.num_parents = 1;

	gate->regmap = regmap;
	gate->bit_idx = bit_idx;
	gate->hw.init = &init;

	hw = &gate->hw;
	ret = clk_hw_register(NULL, hw);
	if (ret) {
	kfree(gate);
	hw = ERR_PTR(ret);
	}

	return hw;
	}

	static void cp110_unregister_gate(struct clk_hw *hw)
	{
	clk_hw_unregister(hw);
	kfree(to_cp110_gate_clk(hw));
	}

	static struct clk_hw cp110_of_clk_get(struct of_phandle_args clkspec,
	void *data)
	{
	struct clk_hw_onecell_data *clk_data = data;
	unsigned int type = clkspec->args[0];
	unsigned int idx = clkspec->args[1];

	if (type == CP110_CLK_TYPE_CORE) {
	if (idx >= CP110_MAX_CORE_CLOCKS)
	return ERR_PTR(-EINVAL);
	return clk_data->hws[idx];
	} else if (type == CP110_CLK_TYPE_GATABLE) {
	if (idx >= CP110_MAX_GATABLE_CLOCKS)
	return ERR_PTR(-EINVAL);
	return clk_data->hws[CP110_MAX_CORE_CLOCKS + idx];
	}

	return ERR_PTR(-EINVAL);
	}

	static char cp110_unique_name(struct device dev, struct device_node *np,
	const char *name)
	{
	const __be32 *reg;
	u64 addr;

	/* Do not create a name if there is no clock */
	if (!name)
	return NULL;

	reg = of_get_property(np, "reg", NULL);
	addr = of_translate_address(np, reg);
	return devm_kasprintf(dev, GFP_KERNEL, "%llx-%s",
	(unsigned long long)addr, name);
	}

	static int cp110_syscon_common_probe(struct platform_device *pdev,
	struct device_node *syscon_node)
	{
	struct regmap *regmap;
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	const char ppv2_name, pll0_name, core_name, x2core_name, *nand_name,
	*sdio_name;
	struct clk_hw_onecell_data *cp110_clk_data;
	struct clk_hw hw, *cp110_clks;
	u32 nand_clk_ctrl;
	int i, ret;
	char *gate_name[ARRAY_SIZE(gate_base_names)];

	regmap = syscon_node_to_regmap(syscon_node);
	if (IS_ERR(regmap))
	return PTR_ERR(regmap);

	ret = regmap_read(regmap, CP110_NAND_FLASH_CLK_CTRL_REG,
	&nand_clk_ctrl);
	if (ret)
	return ret;

	cp110_clk_data = devm_kzalloc(dev, sizeof(*cp110_clk_data) +
	sizeof(struct clk_hw ) CP110_CLK_NUM,
	GFP_KERNEL);
	if (!cp110_clk_data)
	return -ENOMEM;

	cp110_clks = cp110_clk_data->hws;
	cp110_clk_data->num = CP110_CLK_NUM;

	/* Register the PLL0 which is the root of the hw tree */
	pll0_name = cp110_unique_name(dev, syscon_node, "pll0");
	hw = clk_hw_register_fixed_rate(NULL, pll0_name, NULL, 0,
	1000 * 1000 * 1000);
	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_pll0;
	}

	cp110_clks[CP110_CORE_PLL0] = hw;

	/* PPv2 is PLL0/3 */
	ppv2_name = cp110_unique_name(dev, syscon_node, "ppv2-core");
	hw = clk_hw_register_fixed_factor(NULL, ppv2_name, pll0_name, 0, 1, 3);
	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_ppv2;
	}

	cp110_clks[CP110_CORE_PPV2] = hw;

	/* X2CORE clock is PLL0/2 */
	x2core_name = cp110_unique_name(dev, syscon_node, "x2core");
	hw = clk_hw_register_fixed_factor(NULL, x2core_name, pll0_name,
	0, 1, 2);
	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_eip;
	}

	cp110_clks[CP110_CORE_X2CORE] = hw;

	/* Core clock is X2CORE/2 */
	core_name = cp110_unique_name(dev, syscon_node, "core");
	hw = clk_hw_register_fixed_factor(NULL, core_name, x2core_name,
	0, 1, 2);
	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_core;
	}

	cp110_clks[CP110_CORE_CORE] = hw;
	/* NAND can be either PLL0/2.5 or core clock */
	nand_name = cp110_unique_name(dev, syscon_node, "nand-core");
	if (nand_clk_ctrl & NF_CLOCK_SEL_400_MASK)
	hw = clk_hw_register_fixed_factor(NULL, nand_name,
	pll0_name, 0, 2, 5);
	else
	hw = clk_hw_register_fixed_factor(NULL, nand_name,
	core_name, 0, 1, 1);
	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_nand;
	}

	cp110_clks[CP110_CORE_NAND] = hw;

	/* SDIO clock is PLL0/2.5 */
	sdio_name = cp110_unique_name(dev, syscon_node, "sdio-core");
	hw = clk_hw_register_fixed_factor(NULL, sdio_name,
	pll0_name, 0, 2, 5);
	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_sdio;
	}

	cp110_clks[CP110_CORE_SDIO] = hw;

	/* create the unique name for all the gate clocks */
	for (i = 0; i < ARRAY_SIZE(gate_base_names); i++)
	gate_name[i] = cp110_unique_name(dev, syscon_node,
	gate_base_names[i]);

	for (i = 0; i < ARRAY_SIZE(gate_base_names); i++) {
	const char *parent;

	if (gate_name[i] == NULL)
	continue;

	switch (i) {
	case CP110_GATE_NAND:
	parent = nand_name;
	break;
	case CP110_GATE_MG:
	case CP110_GATE_GOP_DP:
	case CP110_GATE_PPV2:
	parent = ppv2_name;
	break;
	case CP110_GATE_SDIO:
	parent = sdio_name;
	break;
	case CP110_GATE_MAIN:
	case CP110_GATE_PCIE_XOR:
	case CP110_GATE_PCIE_X4:
	case CP110_GATE_EIP150:
	case CP110_GATE_EIP197:
	parent = x2core_name;
	break;
	default:
	parent = core_name;
	break;
	}
	hw = cp110_register_gate(gate_name[i], parent, regmap, i);

	if (IS_ERR(hw)) {
	ret = PTR_ERR(hw);
	goto fail_gate;
	}

	cp110_clks[CP110_MAX_CORE_CLOCKS + i] = hw;
	}

	ret = of_clk_add_hw_provider(np, cp110_of_clk_get, cp110_clk_data);
	if (ret)
	goto fail_clk_add;

	platform_set_drvdata(pdev, cp110_clks);

	return 0;

	fail_clk_add:
	fail_gate:
	for (i = 0; i < CP110_MAX_GATABLE_CLOCKS; i++) {
	hw = cp110_clks[CP110_MAX_CORE_CLOCKS + i];

	if (hw)
	cp110_unregister_gate(hw);
	}

	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_SDIO]);
	fail_sdio:
	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_NAND]);
	fail_nand:
	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_CORE]);
	fail_core:
	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_X2CORE]);
	fail_eip:
	clk_hw_unregister_fixed_factor(cp110_clks[CP110_CORE_PPV2]);
	fail_ppv2:
	clk_hw_unregister_fixed_rate(cp110_clks[CP110_CORE_PLL0]);
	fail_pll0:
	return ret;
	}

	static int cp110_syscon_legacy_clk_probe(struct platform_device *pdev)
	{
	dev_warn(&pdev->dev, FW_WARN "Using legacy device tree binding\n");
	dev_warn(&pdev->dev, FW_WARN "Update your device tree:\n");
	dev_warn(&pdev->dev, FW_WARN
	"This binding won't be supported in future kernels\n");

	return cp110_syscon_common_probe(pdev, pdev->dev.of_node);
	}

	static int cp110_clk_probe(struct platform_device *pdev)
	{
	return cp110_syscon_common_probe(pdev, pdev->dev.of_node->parent);
	}

	static const struct of_device_id cp110_syscon_legacy_of_match[] = {
	{ .compatible = "marvell,cp110-system-controller0", },
	{ }
	};

	static struct platform_driver cp110_syscon_legacy_driver = {
	.probe = cp110_syscon_legacy_clk_probe,
	.driver = {
	.name = "marvell-cp110-system-controller0",
	.of_match_table = cp110_syscon_legacy_of_match,
	.suppress_bind_attrs = true,
	},
	};
	builtin_platform_driver(cp110_syscon_legacy_driver);

	static const struct of_device_id cp110_clock_of_match[] = {
	{ .compatible = "marvell,cp110-clock", },
	{ }
	};

	static struct platform_driver cp110_clock_driver = {
	.probe = cp110_clk_probe,
	.driver = {
	.name = "marvell-cp110-clock",
	.of_match_table = cp110_clock_of_match,
	.suppress_bind_attrs = true,
	},
	};
	builtin_platform_driver(cp110_clock_driver);