diff options
| -rw-r--r-- | drivers/mfd/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/hi6421-pmic-core.c | 113 | ||||
| -rw-r--r-- | include/linux/mfd/hi6421-pmic.h | 41 |
4 files changed, 168 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 049796a28215..609b7a2144d6 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -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 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index bd111213bd58..1d11a247abbb 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -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 diff --git a/drivers/mfd/hi6421-pmic-core.c b/drivers/mfd/hi6421-pmic-core.c new file mode 100644 index 000000000000..321a2656fd00 --- /dev/null +++ b/drivers/mfd/hi6421-pmic-core.c @@ -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"); diff --git a/include/linux/mfd/hi6421-pmic.h b/include/linux/mfd/hi6421-pmic.h new file mode 100644 index 000000000000..587273e35acf --- /dev/null +++ b/include/linux/mfd/hi6421-pmic.h @@ -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 */ |