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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>
This commit is contained in:
Guodong Xu
Lee Jones
parent
0709b048ce
commit
8bdf87b400
@ -210,6 +210,19 @@ config MFD_MC13XXX_I2C
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help
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Select this if your MC13xxx is connected via an I2C bus.
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config MFD_HI6421_PMIC
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tristate "HiSilicon Hi6421 PMU/Codec IC"
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depends on OF
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select MFD_CORE
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select REGMAP_MMIO
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help
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Add support for HiSilicon Hi6421 PMIC. Hi6421 includes multi-
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functions, such as regulators, RTC, codec, Coulomb counter, etc.
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This driver includes core APIs _only_. You have to select
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individul components like voltage regulators under corresponding
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menus in order to enable them.
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We communicate with the Hi6421 via memory-mapped I/O.
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config HTC_EGPIO
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bool "HTC EGPIO support"
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depends on GPIOLIB && ARM
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@ -172,6 +172,7 @@ obj-$(CONFIG_MFD_AS3722) += as3722.o
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obj-$(CONFIG_MFD_STW481X) += stw481x.o
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obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
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obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
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obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
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intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
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obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
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113
drivers/mfd/hi6421-pmic-core.c
Normal file
113
drivers/mfd/hi6421-pmic-core.c
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@ -0,0 +1,113 @@
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/*
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* Device driver for Hi6421 IC
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*
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* Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
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* http://www.hisilicon.com
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* Copyright (c) <2013-2014> Linaro Ltd.
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* http://www.linaro.org
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*
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* Author: Guodong Xu <guodong.xu@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/hi6421-pmic.h>
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static const struct mfd_cell hi6421_devs[] = {
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{ .name = "hi6421-regulator", },
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};
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static struct regmap_config hi6421_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 8,
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.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
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};
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static int hi6421_pmic_probe(struct platform_device *pdev)
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{
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struct hi6421_pmic *pmic;
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struct resource *res;
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void __iomem *base;
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int ret;
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pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
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if (!pmic)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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base = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(base))
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return PTR_ERR(base);
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pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
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&hi6421_regmap_config);
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if (IS_ERR(pmic->regmap)) {
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dev_err(&pdev->dev,
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"regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
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return PTR_ERR(pmic->regmap);
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}
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/* set over-current protection debounce 8ms */
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regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
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(HI6421_OCP_DEB_SEL_MASK
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| HI6421_OCP_EN_DEBOUNCE_MASK
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| HI6421_OCP_AUTO_STOP_MASK),
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(HI6421_OCP_DEB_SEL_8MS
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| HI6421_OCP_EN_DEBOUNCE_ENABLE));
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platform_set_drvdata(pdev, pmic);
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ret = mfd_add_devices(&pdev->dev, 0, hi6421_devs,
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ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
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if (ret) {
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dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int hi6421_pmic_remove(struct platform_device *pdev)
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{
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mfd_remove_devices(&pdev->dev);
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return 0;
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}
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static struct of_device_id of_hi6421_pmic_match_tbl[] = {
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{ .compatible = "hisilicon,hi6421-pmic", },
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{ },
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};
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static struct platform_driver hi6421_pmic_driver = {
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.driver = {
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.name = "hi6421_pmic",
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.of_match_table = of_hi6421_pmic_match_tbl,
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},
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.probe = hi6421_pmic_probe,
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.remove = hi6421_pmic_remove,
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};
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module_platform_driver(hi6421_pmic_driver);
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MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
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MODULE_DESCRIPTION("Hi6421 PMIC driver");
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MODULE_LICENSE("GPL v2");
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41
include/linux/mfd/hi6421-pmic.h
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41
include/linux/mfd/hi6421-pmic.h
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@ -0,0 +1,41 @@
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/*
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* Header file for device driver Hi6421 PMIC
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*
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* Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
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* http://www.hisilicon.com
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* Copyright (c) <2013-2014> Linaro Ltd.
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* http://www.linaro.org
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*
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* Author: Guodong Xu <guodong.xu@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __HI6421_PMIC_H
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#define __HI6421_PMIC_H
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/* Hi6421 registers are mapped to memory bus in 4 bytes stride */
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#define HI6421_REG_TO_BUS_ADDR(x) (x << 2)
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/* Hi6421 maximum register number */
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#define HI6421_REG_MAX 0xFF
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/* Hi6421 OCP (over current protection) and DEB (debounce) control register */
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#define HI6421_OCP_DEB_CTRL_REG HI6421_REG_TO_BUS_ADDR(0x51)
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#define HI6421_OCP_DEB_SEL_MASK 0x0C
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#define HI6421_OCP_DEB_SEL_8MS 0x00
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#define HI6421_OCP_DEB_SEL_16MS 0x04
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#define HI6421_OCP_DEB_SEL_32MS 0x08
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#define HI6421_OCP_DEB_SEL_64MS 0x0C
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#define HI6421_OCP_EN_DEBOUNCE_MASK 0x02
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#define HI6421_OCP_EN_DEBOUNCE_ENABLE 0x02
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#define HI6421_OCP_AUTO_STOP_MASK 0x01
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#define HI6421_OCP_AUTO_STOP_ENABLE 0x01
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struct hi6421_pmic {
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struct regmap *regmap;
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};
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#endif /* __HI6421_PMIC_H */
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