[linux-2.6-block.git] / drivers / mfd / hi6421-pmic-core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Device driver for Hi6421 PMIC
 *
 * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
 *              http://www.hisilicon.com
 * Copyright (c) <2013-2017> Linaro Ltd.
 *              http://www.linaro.org
 *
 * Author: Guodong Xu <guodong.xu@linaro.org>
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/hi6421-pmic.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

static const struct mfd_cell hi6421_devs[] = {
	{ .name = "hi6421-regulator", },
};

static const struct mfd_cell hi6421v530_devs[] = {
	{ .name = "hi6421v530-regulator", },
};

static const struct regmap_config hi6421_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 8,
	.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
};

static const struct of_device_id of_hi6421_pmic_match[] = {
	{
		.compatible = "hisilicon,hi6421-pmic",
		.data = (void *)HI6421
	},
	{
		.compatible = "hisilicon,hi6421v530-pmic",
		.data = (void *)HI6421_V530
	},
	{ },
};
MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);

static int hi6421_pmic_probe(struct platform_device *pdev)
{
	struct hi6421_pmic *pmic;
	struct resource *res;
	const struct of_device_id *id;
	const struct mfd_cell *subdevs;
	enum hi6421_type type;
	void __iomem *base;
	int n_subdevs, ret;

	id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
	if (!id)
		return -EINVAL;
	type = (enum hi6421_type)id->data;

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

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
						 &hi6421_regmap_config);
	if (IS_ERR(pmic->regmap)) {
		dev_err(&pdev->dev, "Failed to initialise Regmap: %ld\n",
						PTR_ERR(pmic->regmap));
		return PTR_ERR(pmic->regmap);
	}

	platform_set_drvdata(pdev, pmic);

	switch (type) {
	case HI6421:
		/* set over-current protection debounce 8ms */
		regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
				(HI6421_OCP_DEB_SEL_MASK
				 | HI6421_OCP_EN_DEBOUNCE_MASK
				 | HI6421_OCP_AUTO_STOP_MASK),
				(HI6421_OCP_DEB_SEL_8MS
				 | HI6421_OCP_EN_DEBOUNCE_ENABLE));

		subdevs = hi6421_devs;
		n_subdevs = ARRAY_SIZE(hi6421_devs);
		break;
	case HI6421_V530:
		subdevs = hi6421v530_devs;
		n_subdevs = ARRAY_SIZE(hi6421v530_devs);
		break;
	default:
		dev_err(&pdev->dev, "Unknown device type %d\n",
						(unsigned int)type);
		return -EINVAL;
	}

	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
				   subdevs, n_subdevs, NULL, 0, NULL);
	if (ret) {
		dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
		return ret;
	}

	return 0;
}

static struct platform_driver hi6421_pmic_driver = {
	.driver = {
		.name = "hi6421_pmic",
		.of_match_table = of_hi6421_pmic_match,
	},
	.probe	= hi6421_pmic_probe,
};
module_platform_driver(hi6421_pmic_driver);

MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
MODULE_DESCRIPTION("Hi6421 PMIC driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
8bdf87b4	2	/*
ec58871f	3	* Device driver for Hi6421 PMIC
8bdf87b4 GX	4	*
	5	* Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
	6	* http://www.hisilicon.com
ec58871f	7	* Copyright (c) <2013-2017> Linaro Ltd.
8bdf87b4 GX	8	* http://www.linaro.org
	9	*
	10	* Author: Guodong Xu <guodong.xu@linaro.org>
8bdf87b4 GX	11	*/
	12
	13	#include <linux/device.h>
	14	#include <linux/err.h>
	15	#include <linux/mfd/core.h>
ec58871f	16	#include <linux/mfd/hi6421-pmic.h>
8bdf87b4	17	#include <linux/module.h>
ec58871f	18	#include <linux/of_device.h>
8bdf87b4 GX	19	#include <linux/platform_device.h>
8bdf87b4 GX	20	#include <linux/regmap.h>
8bdf87b4 GX	21
	22	static const struct mfd_cell hi6421_devs[] = {
	23	{ .name = "hi6421-regulator", },
	24	};
	25
ec58871f GX	26	static const struct mfd_cell hi6421v530_devs[] = {
	27	{ .name = "hi6421v530-regulator", },
	28	};
	29
7f9e3feb	30	static const struct regmap_config hi6421_regmap_config = {
8bdf87b4 GX	31	.reg_bits = 32,
	32	.reg_stride = 4,
	33	.val_bits = 8,
	34	.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
	35	};
	36
ec58871f GX	37	static const struct of_device_id of_hi6421_pmic_match[] = {
	38	{
	39	.compatible = "hisilicon,hi6421-pmic",
	40	.data = (void *)HI6421
	41	},
	42	{
	43	.compatible = "hisilicon,hi6421v530-pmic",
	44	.data = (void *)HI6421_V530
	45	},
	46	{ },
	47	};
	48	MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);
	49
8bdf87b4 GX	50	static int hi6421_pmic_probe(struct platform_device *pdev)
	51	{
	52	struct hi6421_pmic *pmic;
	53	struct resource *res;
ec58871f GX	54	const struct of_device_id *id;
	55	const struct mfd_cell *subdevs;
	56	enum hi6421_type type;
8bdf87b4	57	void __iomem *base;
ec58871f GX	58	int n_subdevs, ret;
	59
	60	id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
	61	if (!id)
	62	return -EINVAL;
	63	type = (enum hi6421_type)id->data;
8bdf87b4 GX	64
	65	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
	66	if (!pmic)
	67	return -ENOMEM;
	68
	69	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	70	base = devm_ioremap_resource(&pdev->dev, res);
	71	if (IS_ERR(base))
	72	return PTR_ERR(base);
	73
	74	pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
	75	&hi6421_regmap_config);
	76	if (IS_ERR(pmic->regmap)) {
568e5476 GX	77	dev_err(&pdev->dev, "Failed to initialise Regmap: %ld\n",
568e5476 GX	78	PTR_ERR(pmic->regmap));
8bdf87b4 GX	79	return PTR_ERR(pmic->regmap);
	80	}
	81
ec58871f GX	82	platform_set_drvdata(pdev, pmic);
	83
	84	switch (type) {
	85	case HI6421:
	86	/* set over-current protection debounce 8ms */
	87	regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
8bdf87b4 GX	88	(HI6421_OCP_DEB_SEL_MASK
	89	\| HI6421_OCP_EN_DEBOUNCE_MASK
	90	\| HI6421_OCP_AUTO_STOP_MASK),
	91	(HI6421_OCP_DEB_SEL_8MS
	92	\| HI6421_OCP_EN_DEBOUNCE_ENABLE));
	93
ec58871f GX	94	subdevs = hi6421_devs;
	95	n_subdevs = ARRAY_SIZE(hi6421_devs);
	96	break;
	97	case HI6421_V530:
	98	subdevs = hi6421v530_devs;
	99	n_subdevs = ARRAY_SIZE(hi6421v530_devs);
	100	break;
	101	default:
	102	dev_err(&pdev->dev, "Unknown device type %d\n",
	103	(unsigned int)type);
	104	return -EINVAL;
	105	}
8bdf87b4	106
ec58871f GX	107	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
ec58871f GX	108	subdevs, n_subdevs, NULL, 0, NULL);
8bdf87b4	109	if (ret) {
568e5476	110	dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
8bdf87b4 GX	111	return ret;
	112	}
	113
	114	return 0;
	115	}
	116
8bdf87b4 GX	117	static struct platform_driver hi6421_pmic_driver = {
8bdf87b4 GX	118	.driver = {
ec58871f GX	119	.name = "hi6421_pmic",
ec58871f GX	120	.of_match_table = of_hi6421_pmic_match,
8bdf87b4 GX	121	},
8bdf87b4 GX	122	.probe = hi6421_pmic_probe,
8bdf87b4 GX	123	};
	124	module_platform_driver(hi6421_pmic_driver);
	125
	126	MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
	127	MODULE_DESCRIPTION("Hi6421 PMIC driver");
	128	MODULE_LICENSE("GPL v2");