On Mon, 01 Sep 2014, Guodong Xu wrote: > 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@xxxxxxxxxx> > --- > drivers/mfd/Kconfig | 13 +++++ > drivers/mfd/Makefile | 1 + > drivers/mfd/hi6421-pmic-core.c | 113 ++++++++++++++++++++++++++++++++++++++++ > include/linux/mfd/hi6421-pmic.h | 41 +++++++++++++++ > 4 files changed, 168 insertions(+) > create mode 100644 drivers/mfd/hi6421-pmic-core.c > create mode 100644 include/linux/mfd/hi6421-pmic.h Applied, thanks. > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index de5abf2..2de4919 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 f001487..dc59efd 100644 > --- a/drivers/mfd/Makefile > +++ b/drivers/mfd/Makefile > @@ -169,6 +169,7 @@ obj-$(CONFIG_MFD_AS3711) += as3711.o > obj-$(CONFIG_MFD_AS3722) += as3722.o > obj-$(CONFIG_MFD_STW481X) += stw481x.o > obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.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 0000000..321a265 > --- /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@xxxxxxxxxx> > + * > + * 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@xxxxxxxxxx>"); > +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 0000000..587273e > --- /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@xxxxxxxxxx> > + * > + * 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 */ -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
