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Commit ec58871f authored by Guodong Xu's avatar Guodong Xu Committed by Lee Jones
Browse files

mfd: hi6421-pmic: Add support for HiSilicon Hi6421v530 



Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates with
main SoC via memory-mapped I/O.

Hi6421v530 and Hi6421 are PMIC chips from the same vendor, HiSilicon,
but at different revisions. They share the same memory-mapped I/O
design. They differ in integrated devices, such as regulator details,
LDO voltage points.

Signed-off-by: default avatarGuodong Xu <guodong.xu@linaro.org>
Signed-off-by: default avatarWang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 568e5476

drivers/mfd/hi6421-pmic-core.c

+52 −18
Original line number Diff line number Diff line 
/*

 * Device driver for Hi6421 IC

 * Device driver for Hi6421 PMIC

 *

 * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.

 *              http://www.hisilicon.com

 * Copyright (c) <2013-2014> Linaro Ltd.

 * Copyright (c) <2013-2017> Linaro Ltd.

 *              http://www.linaro.org

 *

 * Author: Guodong Xu <guodong.xu@linaro.org>
@@ -16,16 +16,20 @@ 
#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.h>

#include <linux/of_device.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 mfd_cell hi6421v530_devs[] = {

	{ .name = "hi6421v530-regulator", },

};



static const struct regmap_config hi6421_regmap_config = {

	.reg_bits = 32,

	.reg_stride = 4,
@@ -33,12 +37,33 @@ static const struct regmap_config hi6421_regmap_config = { 
	.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 ret;

	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)
@@ -57,6 +82,10 @@ static int hi6421_pmic_probe(struct platform_device *pdev) 
		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
@@ -65,10 +94,21 @@ static int hi6421_pmic_probe(struct platform_device *pdev) 
				(HI6421_OCP_DEB_SEL_8MS

				 | HI6421_OCP_EN_DEBOUNCE_ENABLE));



	platform_set_drvdata(pdev, pmic);

		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, 0, hi6421_devs,

				   ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);

	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;
@@ -77,16 +117,10 @@ static int hi6421_pmic_probe(struct platform_device *pdev) 
	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,

		.of_match_table = of_hi6421_pmic_match,

	},

	.probe	= hi6421_pmic_probe,

};

include/linux/mfd/hi6421-pmic.h

+5 −0
Original line number Diff line number Diff line
@@ -38,4 +38,9 @@ struct hi6421_pmic { 
	struct regmap		*regmap;

};



enum hi6421_type {

	HI6421 = 0,

	HI6421_V530,

};



#endif		/* __HI6421_PMIC_H */