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

/*
 * Device driver for Hi6421 IC
 *
 * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
 *              http://www.hisilicon.com
 * Copyright (c) <2013-2014> Linaro Ltd.
 *              http://www.linaro.org
 *
 * Author: Guodong Xu <guodong.xu@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

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

static const struct mfd_cell hi6421_devs[] = {
	{ .name = "hi6421-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 int hi6421_pmic_probe(struct platform_device *pdev)
{
	struct hi6421_pmic *pmic;
	struct resource *res;
	void __iomem *base;
	int ret;

	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,
			"regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
		return PTR_ERR(pmic->regmap);
	}

	/* 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));

	platform_set_drvdata(pdev, pmic);

	ret = mfd_add_devices(&pdev->dev, 0, hi6421_devs,
			ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
	if (ret) {
		dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static int hi6421_pmic_remove(struct platform_device *pdev)
{
	mfd_remove_devices(&pdev->dev);

	return 0;
}

static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
	{ .compatible = "hisilicon,hi6421-pmic", },
	{ },
};
MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);

static struct platform_driver hi6421_pmic_driver = {
	.driver = {
		.name	= "hi6421_pmic",
		.of_match_table = of_hi6421_pmic_match_tbl,
	},
	.probe	= hi6421_pmic_probe,
	.remove	= hi6421_pmic_remove,
};
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
8bdf87b4 GX	1	/*
	2	* Device driver for Hi6421 IC
	3	*
	4	* Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
	5	* http://www.hisilicon.com
	6	* Copyright (c) <2013-2014> Linaro Ltd.
	7	* http://www.linaro.org
	8	*
	9	* Author: Guodong Xu <guodong.xu@linaro.org>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope it will be useful, but WITHOUT
	17	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	19	* more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	23	*/
	24
	25	#include <linux/device.h>
	26	#include <linux/err.h>
	27	#include <linux/mfd/core.h>
	28	#include <linux/module.h>
	29	#include <linux/of.h>
	30	#include <linux/platform_device.h>
	31	#include <linux/regmap.h>
	32	#include <linux/mfd/hi6421-pmic.h>
	33
	34	static const struct mfd_cell hi6421_devs[] = {
	35	{ .name = "hi6421-regulator", },
	36	};
	37
7f9e3feb	38	static const struct regmap_config hi6421_regmap_config = {
8bdf87b4 GX	39	.reg_bits = 32,
	40	.reg_stride = 4,
	41	.val_bits = 8,
	42	.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
	43	};
	44
	45	static int hi6421_pmic_probe(struct platform_device *pdev)
	46	{
	47	struct hi6421_pmic *pmic;
	48	struct resource *res;
	49	void __iomem *base;
	50	int ret;
	51
	52	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
	53	if (!pmic)
	54	return -ENOMEM;
	55
	56	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	57	base = devm_ioremap_resource(&pdev->dev, res);
	58	if (IS_ERR(base))
	59	return PTR_ERR(base);
	60
	61	pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
	62	&hi6421_regmap_config);
	63	if (IS_ERR(pmic->regmap)) {
	64	dev_err(&pdev->dev,
	65	"regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
	66	return PTR_ERR(pmic->regmap);
	67	}
	68
	69	/* set over-current protection debounce 8ms */
	70	regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
	71	(HI6421_OCP_DEB_SEL_MASK
	72	\| HI6421_OCP_EN_DEBOUNCE_MASK
	73	\| HI6421_OCP_AUTO_STOP_MASK),
	74	(HI6421_OCP_DEB_SEL_8MS
	75	\| HI6421_OCP_EN_DEBOUNCE_ENABLE));
	76
	77	platform_set_drvdata(pdev, pmic);
	78
	79	ret = mfd_add_devices(&pdev->dev, 0, hi6421_devs,
	80	ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
	81	if (ret) {
	82	dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
	83	return ret;
	84	}
	85
	86	return 0;
	87	}
	88
	89	static int hi6421_pmic_remove(struct platform_device *pdev)
	90	{
	91	mfd_remove_devices(&pdev->dev);
	92
	93	return 0;
	94	}
	95
908725d5	96	static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
8bdf87b4 GX	97	{ .compatible = "hisilicon,hi6421-pmic", },
	98	{ },
	99	};
54450736	100	MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);
8bdf87b4 GX	101
	102	static struct platform_driver hi6421_pmic_driver = {
	103	.driver = {
	104	.name = "hi6421_pmic",
	105	.of_match_table = of_hi6421_pmic_match_tbl,
	106	},
	107	.probe = hi6421_pmic_probe,
	108	.remove = hi6421_pmic_remove,
	109	};
	110	module_platform_driver(hi6421_pmic_driver);
	111
	112	MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
	113	MODULE_DESCRIPTION("Hi6421 PMIC driver");
	114	MODULE_LICENSE("GPL v2");