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mfd: hi6421-pmic: Add support for HiSilicon Hi6421v530

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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: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Guodong Xu 2017-07-20 15:32:42 +08:00 committed by Lee Jones
parent 568e5476cf
commit ec58871fb9
2 changed files with 57 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
drivers/mfd/hi6421-pmic-core.c
View File

@ -1,9 +1,9 @@
/*
* 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)
@ -57,18 +82,33 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
return PTR_ERR(pmic->regmap);
}
/* set over-current protection debounce 8ms */
regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
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));
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,
.name = "hi6421_pmic",
.of_match_table = of_hi6421_pmic_match,
},
.probe = hi6421_pmic_probe,
};

5
include/linux/mfd/hi6421-pmic.h
View File

@ -38,4 +38,9 @@ struct hi6421_pmic {
struct regmap *regmap;
};
enum hi6421_type {
HI6421 = 0,
HI6421_V530,
};
#endif /* __HI6421_PMIC_H */