mfd: Add HI6421 PMIC Core driver
This adds driver to support HiSilicon Hi6421 PMIC. Hi6421 includes multi- functions, such as regulators, codec, ADCs, Coulomb counter, etc. This driver includes core APIs _only_. Drivers for individul components, like voltage regulators, are implemented in corresponding driver directories and files. Registers in Hi6421 are memory mapped, so using regmap-mmio API. Signed-off-by: Guodong Xu <guodong.xu@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>wifi-calibration
Guodong Xu
Lee Jones
parent
0709b048ce
commit
8bdf87b400
|
|
@ -210,6 +210,19 @@ config MFD_MC13XXX_I2C
|
|||
help
|
||||
Select this if your MC13xxx is connected via an I2C bus.
|
||||
|
||||
config MFD_HI6421_PMIC
|
||||
tristate "HiSilicon Hi6421 PMU/Codec IC"
|
||||
depends on OF
|
||||
select MFD_CORE
|
||||
select REGMAP_MMIO
|
||||
help
|
||||
Add support for HiSilicon Hi6421 PMIC. Hi6421 includes multi-
|
||||
functions, such as regulators, RTC, codec, Coulomb counter, etc.
|
||||
This driver includes core APIs _only_. You have to select
|
||||
individul components like voltage regulators under corresponding
|
||||
menus in order to enable them.
|
||||
We communicate with the Hi6421 via memory-mapped I/O.
|
||||
|
||||
config HTC_EGPIO
|
||||
bool "HTC EGPIO support"
|
||||
depends on GPIOLIB && ARM
|
||||
|
|
|
|||
|
|
@ -172,6 +172,7 @@ obj-$(CONFIG_MFD_AS3722) += as3722.o
|
|||
obj-$(CONFIG_MFD_STW481X) += stw481x.o
|
||||
obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
|
||||
obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
|
||||
obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
|
||||
|
||||
intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
|
||||
obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,113 @@
|
|||
/*
|
||||
* 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 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 struct of_device_id of_hi6421_pmic_match_tbl[] = {
|
||||
{ .compatible = "hisilicon,hi6421-pmic", },
|
||||
{ },
|
||||
};
|
||||
|
||||
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");
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
/*
|
||||
* Header file for device driver Hi6421 PMIC
|
||||
*
|
||||
* 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 version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef __HI6421_PMIC_H
|
||||
#define __HI6421_PMIC_H
|
||||
|
||||
/* Hi6421 registers are mapped to memory bus in 4 bytes stride */
|
||||
#define HI6421_REG_TO_BUS_ADDR(x) (x << 2)
|
||||
|
||||
/* Hi6421 maximum register number */
|
||||
#define HI6421_REG_MAX 0xFF
|
||||
|
||||
/* Hi6421 OCP (over current protection) and DEB (debounce) control register */
|
||||
#define HI6421_OCP_DEB_CTRL_REG HI6421_REG_TO_BUS_ADDR(0x51)
|
||||
#define HI6421_OCP_DEB_SEL_MASK 0x0C
|
||||
#define HI6421_OCP_DEB_SEL_8MS 0x00
|
||||
#define HI6421_OCP_DEB_SEL_16MS 0x04
|
||||
#define HI6421_OCP_DEB_SEL_32MS 0x08
|
||||
#define HI6421_OCP_DEB_SEL_64MS 0x0C
|
||||
#define HI6421_OCP_EN_DEBOUNCE_MASK 0x02
|
||||
#define HI6421_OCP_EN_DEBOUNCE_ENABLE 0x02
|
||||
#define HI6421_OCP_AUTO_STOP_MASK 0x01
|
||||
#define HI6421_OCP_AUTO_STOP_ENABLE 0x01
|
||||
|
||||
struct hi6421_pmic {
|
||||
struct regmap *regmap;
|
||||
};
|
||||
|
||||
#endif /* __HI6421_PMIC_H */
|
||||
Loading…
Reference in New Issue