[linux-block.git] / drivers / clk / clk-rk808.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Clkout driver for Rockchip RK808
 *
 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
 *
 * Author:Chris Zhong <zyw@rock-chips.com>
 */

#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mfd/rk808.h>
#include <linux/i2c.h>

struct rk808_clkout {
	struct rk808 *rk808;
	struct clk_hw		clkout1_hw;
	struct clk_hw		clkout2_hw;
};

static unsigned long rk808_clkout_recalc_rate(struct clk_hw *hw,
					      unsigned long parent_rate)
{
	return 32768;
}

static int rk808_clkout2_enable(struct clk_hw *hw, bool enable)
{
	struct rk808_clkout *rk808_clkout = container_of(hw,
							 struct rk808_clkout,
							 clkout2_hw);
	struct rk808 *rk808 = rk808_clkout->rk808;

	return regmap_update_bits(rk808->regmap, RK808_CLK32OUT_REG,
				  CLK32KOUT2_EN, enable ? CLK32KOUT2_EN : 0);
}

static int rk808_clkout2_prepare(struct clk_hw *hw)
{
	return rk808_clkout2_enable(hw, true);
}

static void rk808_clkout2_unprepare(struct clk_hw *hw)
{
	rk808_clkout2_enable(hw, false);
}

static int rk808_clkout2_is_prepared(struct clk_hw *hw)
{
	struct rk808_clkout *rk808_clkout = container_of(hw,
							 struct rk808_clkout,
							 clkout2_hw);
	struct rk808 *rk808 = rk808_clkout->rk808;
	uint32_t val;

	int ret = regmap_read(rk808->regmap, RK808_CLK32OUT_REG, &val);

	if (ret < 0)
		return ret;

	return (val & CLK32KOUT2_EN) ? 1 : 0;
}

static const struct clk_ops rk808_clkout1_ops = {
	.recalc_rate = rk808_clkout_recalc_rate,
};

static const struct clk_ops rk808_clkout2_ops = {
	.prepare = rk808_clkout2_prepare,
	.unprepare = rk808_clkout2_unprepare,
	.is_prepared = rk808_clkout2_is_prepared,
	.recalc_rate = rk808_clkout_recalc_rate,
};

static struct clk_hw *
of_clk_rk808_get(struct of_phandle_args *clkspec, void *data)
{
	struct rk808_clkout *rk808_clkout = data;
	unsigned int idx = clkspec->args[0];

	if (idx >= 2) {
		pr_err("%s: invalid index %u\n", __func__, idx);
		return ERR_PTR(-EINVAL);
	}

	return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw;
}

static int rk817_clkout2_enable(struct clk_hw *hw, bool enable)
{
	struct rk808_clkout *rk808_clkout = container_of(hw,
							 struct rk808_clkout,
							 clkout2_hw);
	struct rk808 *rk808 = rk808_clkout->rk808;

	return regmap_update_bits(rk808->regmap, RK817_SYS_CFG(1),
				  RK817_CLK32KOUT2_EN,
				  enable ? RK817_CLK32KOUT2_EN : 0);
}

static int rk817_clkout2_prepare(struct clk_hw *hw)
{
	return rk817_clkout2_enable(hw, true);
}

static void rk817_clkout2_unprepare(struct clk_hw *hw)
{
	rk817_clkout2_enable(hw, false);
}

static int rk817_clkout2_is_prepared(struct clk_hw *hw)
{
	struct rk808_clkout *rk808_clkout = container_of(hw,
							 struct rk808_clkout,
							 clkout2_hw);
	struct rk808 *rk808 = rk808_clkout->rk808;
	unsigned int val;

	int ret = regmap_read(rk808->regmap, RK817_SYS_CFG(1), &val);

	if (ret < 0)
		return 0;

	return (val & RK817_CLK32KOUT2_EN) ? 1 : 0;
}

static const struct clk_ops rk817_clkout2_ops = {
	.prepare = rk817_clkout2_prepare,
	.unprepare = rk817_clkout2_unprepare,
	.is_prepared = rk817_clkout2_is_prepared,
	.recalc_rate = rk808_clkout_recalc_rate,
};

static const struct clk_ops *rkpmic_get_ops(long variant)
{
	switch (variant) {
	case RK809_ID:
	case RK817_ID:
		return &rk817_clkout2_ops;
	/*
	 * For the default case, it match the following PMIC type.
	 * RK805_ID
	 * RK808_ID
	 * RK818_ID
	 */
	default:
		return &rk808_clkout2_ops;
	}
}

static int rk808_clkout_probe(struct platform_device *pdev)
{
	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
	struct i2c_client *client = rk808->i2c;
	struct device_node *node = client->dev.of_node;
	struct clk_init_data init = {};
	struct rk808_clkout *rk808_clkout;
	int ret;

	rk808_clkout = devm_kzalloc(&client->dev,
				    sizeof(*rk808_clkout), GFP_KERNEL);
	if (!rk808_clkout)
		return -ENOMEM;

	rk808_clkout->rk808 = rk808;

	init.parent_names = NULL;
	init.num_parents = 0;
	init.name = "rk808-clkout1";
	init.ops = &rk808_clkout1_ops;
	rk808_clkout->clkout1_hw.init = &init;

	/* optional override of the clockname */
	of_property_read_string_index(node, "clock-output-names",
				      0, &init.name);

	ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout1_hw);
	if (ret)
		return ret;

	init.name = "rk808-clkout2";
	init.ops = rkpmic_get_ops(rk808->variant);
	rk808_clkout->clkout2_hw.init = &init;

	/* optional override of the clockname */
	of_property_read_string_index(node, "clock-output-names",
				      1, &init.name);

	ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout2_hw);
	if (ret)
		return ret;

	return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_rk808_get,
					   rk808_clkout);
}

static struct platform_driver rk808_clkout_driver = {
	.probe = rk808_clkout_probe,
	.driver		= {
		.name	= "rk808-clkout",
	},
};

module_platform_driver(rk808_clkout_driver);

MODULE_DESCRIPTION("Clkout driver for the rk808 series PMICs");
MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rk808-clkout");
Commit	Line	Data
2025cf9e	1	// SPDX-License-Identifier: GPL-2.0-only
038b892a CZ	2	/*
	3	* Clkout driver for Rockchip RK808
	4	*
	5	* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
	6	*
	7	* Author:Chris Zhong <zyw@rock-chips.com>
038b892a CZ	8	*/
038b892a CZ	9
038b892a CZ	10	#include <linux/clk-provider.h>
	11	#include <linux/module.h>
	12	#include <linux/slab.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/mfd/rk808.h>
	15	#include <linux/i2c.h>
	16
038b892a CZ	17	struct rk808_clkout {
038b892a CZ	18	struct rk808 *rk808;
038b892a CZ	19	struct clk_hw clkout1_hw;
	20	struct clk_hw clkout2_hw;
	21	};
	22
	23	static unsigned long rk808_clkout_recalc_rate(struct clk_hw *hw,
	24	unsigned long parent_rate)
	25	{
	26	return 32768;
	27	}
	28
	29	static int rk808_clkout2_enable(struct clk_hw *hw, bool enable)
	30	{
	31	struct rk808_clkout *rk808_clkout = container_of(hw,
	32	struct rk808_clkout,
	33	clkout2_hw);
	34	struct rk808 *rk808 = rk808_clkout->rk808;
	35
	36	return regmap_update_bits(rk808->regmap, RK808_CLK32OUT_REG,
	37	CLK32KOUT2_EN, enable ? CLK32KOUT2_EN : 0);
	38	}
	39
	40	static int rk808_clkout2_prepare(struct clk_hw *hw)
	41	{
	42	return rk808_clkout2_enable(hw, true);
	43	}
	44
	45	static void rk808_clkout2_unprepare(struct clk_hw *hw)
	46	{
	47	rk808_clkout2_enable(hw, false);
	48	}
	49
	50	static int rk808_clkout2_is_prepared(struct clk_hw *hw)
	51	{
	52	struct rk808_clkout *rk808_clkout = container_of(hw,
	53	struct rk808_clkout,
	54	clkout2_hw);
	55	struct rk808 *rk808 = rk808_clkout->rk808;
	56	uint32_t val;
	57
	58	int ret = regmap_read(rk808->regmap, RK808_CLK32OUT_REG, &val);
	59
	60	if (ret < 0)
	61	return ret;
	62
	63	return (val & CLK32KOUT2_EN) ? 1 : 0;
	64	}
	65
	66	static const struct clk_ops rk808_clkout1_ops = {
	67	.recalc_rate = rk808_clkout_recalc_rate,
	68	};
	69
	70	static const struct clk_ops rk808_clkout2_ops = {
	71	.prepare = rk808_clkout2_prepare,
	72	.unprepare = rk808_clkout2_unprepare,
	73	.is_prepared = rk808_clkout2_is_prepared,
	74	.recalc_rate = rk808_clkout_recalc_rate,
	75	};
	76
a8b6e85d SB	77	static struct clk_hw *
	78	of_clk_rk808_get(struct of_phandle_args clkspec, void data)
	79	{
	80	struct rk808_clkout *rk808_clkout = data;
	81	unsigned int idx = clkspec->args[0];
	82
	83	if (idx >= 2) {
	84	pr_err("%s: invalid index %u\n", __func__, idx);
	85	return ERR_PTR(-EINVAL);
	86	}
	87
	88	return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw;
	89	}
	90
8ed14401 TX	91	static int rk817_clkout2_enable(struct clk_hw *hw, bool enable)
	92	{
	93	struct rk808_clkout *rk808_clkout = container_of(hw,
	94	struct rk808_clkout,
	95	clkout2_hw);
	96	struct rk808 *rk808 = rk808_clkout->rk808;
	97
	98	return regmap_update_bits(rk808->regmap, RK817_SYS_CFG(1),
	99	RK817_CLK32KOUT2_EN,
	100	enable ? RK817_CLK32KOUT2_EN : 0);
	101	}
	102
	103	static int rk817_clkout2_prepare(struct clk_hw *hw)
	104	{
	105	return rk817_clkout2_enable(hw, true);
	106	}
	107
	108	static void rk817_clkout2_unprepare(struct clk_hw *hw)
	109	{
	110	rk817_clkout2_enable(hw, false);
	111	}
	112
	113	static int rk817_clkout2_is_prepared(struct clk_hw *hw)
	114	{
	115	struct rk808_clkout *rk808_clkout = container_of(hw,
	116	struct rk808_clkout,
	117	clkout2_hw);
	118	struct rk808 *rk808 = rk808_clkout->rk808;
	119	unsigned int val;
	120
	121	int ret = regmap_read(rk808->regmap, RK817_SYS_CFG(1), &val);
	122
	123	if (ret < 0)
	124	return 0;
	125
	126	return (val & RK817_CLK32KOUT2_EN) ? 1 : 0;
	127	}
	128
	129	static const struct clk_ops rk817_clkout2_ops = {
	130	.prepare = rk817_clkout2_prepare,
	131	.unprepare = rk817_clkout2_unprepare,
	132	.is_prepared = rk817_clkout2_is_prepared,
	133	.recalc_rate = rk808_clkout_recalc_rate,
	134	};
	135
	136	static const struct clk_ops *rkpmic_get_ops(long variant)
	137	{
	138	switch (variant) {
	139	case RK809_ID:
	140	case RK817_ID:
	141	return &rk817_clkout2_ops;
	142	/*
	143	* For the default case, it match the following PMIC type.
	144	* RK805_ID
	145	* RK808_ID
	146	* RK818_ID
	147	*/
	148	default:
	149	return &rk808_clkout2_ops;
	150	}
	151	}
	152
038b892a CZ	153	static int rk808_clkout_probe(struct platform_device *pdev)
	154	{
	155	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
	156	struct i2c_client *client = rk808->i2c;
	157	struct device_node *node = client->dev.of_node;
	158	struct clk_init_data init = {};
038b892a	159	struct rk808_clkout *rk808_clkout;
a8b6e85d	160	int ret;
038b892a CZ	161
	162	rk808_clkout = devm_kzalloc(&client->dev,
	163	sizeof(*rk808_clkout), GFP_KERNEL);
	164	if (!rk808_clkout)
	165	return -ENOMEM;
	166
	167	rk808_clkout->rk808 = rk808;
	168
038b892a CZ	169	init.parent_names = NULL;
	170	init.num_parents = 0;
	171	init.name = "rk808-clkout1";
	172	init.ops = &rk808_clkout1_ops;
	173	rk808_clkout->clkout1_hw.init = &init;
	174
	175	/* optional override of the clockname */
	176	of_property_read_string_index(node, "clock-output-names",
	177	0, &init.name);
	178
a8b6e85d SB	179	ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout1_hw);
	180	if (ret)
	181	return ret;
038b892a CZ	182
038b892a CZ	183	init.name = "rk808-clkout2";
8ed14401	184	init.ops = rkpmic_get_ops(rk808->variant);
038b892a CZ	185	rk808_clkout->clkout2_hw.init = &init;
	186
	187	/* optional override of the clockname */
	188	of_property_read_string_index(node, "clock-output-names",
	189	1, &init.name);
	190
a8b6e85d SB	191	ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout2_hw);
	192	if (ret)
	193	return ret;
038b892a	194
25224667 MV	195	return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_rk808_get,
25224667 MV	196	rk808_clkout);
038b892a CZ	197	}
	198
	199	static struct platform_driver rk808_clkout_driver = {
	200	.probe = rk808_clkout_probe,
038b892a CZ	201	.driver = {
	202	.name = "rk808-clkout",
	203	},
	204	};
	205
	206	module_platform_driver(rk808_clkout_driver);
	207
	208	MODULE_DESCRIPTION("Clkout driver for the rk808 series PMICs");
	209	MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
	210	MODULE_LICENSE("GPL");
	211	MODULE_ALIAS("platform:rk808-clkout");