You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
131 lines
3.3 KiB
131 lines
3.3 KiB
/*
|
|
* 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>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#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");
|
|
|