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/*
* 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");
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