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Commit b52207ef authored by Chen Feng's avatar Chen Feng Committed by Lee Jones
Browse files

mfd: hi655x: Add MFD driver for hi655x 



Add PMIC MFD driver to support hisilicon hi665x.

Signed-off-by: default avatarChen Feng <puck.chen@hisilicon.com>
Signed-off-by: default avatarFei Wang <w.f@huawei.com>
Signed-off-by: default avatarXinwei Kong <kong.kongxinwei@hisilicon.com>
Reviewed-by: default avatarHaojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 68b21094

drivers/mfd/Kconfig

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@@ -319,6 +319,16 @@ config MFD_HI6421_PMIC 
	  menus in order to enable them.

	  We communicate with the Hi6421 via memory-mapped I/O.



config MFD_HI655X_PMIC

	tristate "HiSilicon Hi655X series PMU/Codec IC"

	depends on ARCH_HISI || COMPILE_TEST

	depends on OF

	select MFD_CORE

	select REGMAP_MMIO

	select REGMAP_IRQ

	help

	  Select this option to enable Hisilicon hi655x series pmic driver.



config HTC_EGPIO

	bool "HTC EGPIO support"

	depends on GPIOLIB && ARM

drivers/mfd/Makefile

+1 −0
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@@ -196,6 +196,7 @@ 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

obj-$(CONFIG_MFD_HI655X_PMIC)   += hi655x-pmic.o

obj-$(CONFIG_MFD_DLN2)		+= dln2.o

obj-$(CONFIG_MFD_RT5033)	+= rt5033.o

obj-$(CONFIG_MFD_SKY81452)	+= sky81452.o

drivers/mfd/hi655x-pmic.c

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/*

 * Device driver for MFD hi655x PMIC

 *

 * Copyright (c) 2016 Hisilicon.

 *

 * Authors:

 * Chen Feng <puck.chen@hisilicon.com>

 * Fei  Wang <w.f@huawei.com>

 *

 * 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.

 */



#include <linux/gpio.h>

#include <linux/io.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/mfd/core.h>

#include <linux/mfd/hi655x-pmic.h>

#include <linux/module.h>

#include <linux/of_gpio.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>



static const struct mfd_cell hi655x_pmic_devs[] = {

	{ .name = "hi655x-regulator", },

};



static const struct regmap_irq hi655x_irqs[] = {

	{ .reg_offset = 0, .mask = OTMP_D1R_INT },

	{ .reg_offset = 0, .mask = VSYS_2P5_R_INT },

	{ .reg_offset = 0, .mask = VSYS_UV_D3R_INT },

	{ .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT },

	{ .reg_offset = 0, .mask = PWRON_D4SR_INT },

	{ .reg_offset = 0, .mask = PWRON_D20F_INT },

	{ .reg_offset = 0, .mask = PWRON_D20R_INT },

	{ .reg_offset = 0, .mask = RESERVE_INT },

};



static const struct regmap_irq_chip hi655x_irq_chip = {

	.name = "hi655x-pmic",

	.irqs = hi655x_irqs,

	.num_regs = 1,

	.num_irqs = ARRAY_SIZE(hi655x_irqs),

	.status_base = HI655X_IRQ_STAT_BASE,

	.mask_base = HI655X_IRQ_MASK_BASE,

};



static struct regmap_config hi655x_regmap_config = {

	.reg_bits = 32,

	.reg_stride = HI655X_STRIDE,

	.val_bits = 8,

	.max_register = HI655X_BUS_ADDR(0xFFF),

};



static void hi655x_local_irq_clear(struct regmap *map)

{

	int i;



	regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR);

	for (i = 0; i < HI655X_IRQ_ARRAY; i++) {

		regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE,

			     HI655X_IRQ_CLR);

	}

}



static int hi655x_pmic_probe(struct platform_device *pdev)

{

	int ret;

	struct hi655x_pmic *pmic;

	struct device *dev = &pdev->dev;

	struct device_node *np = dev->of_node;

	void __iomem *base;



	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);

	if (!pmic)

		return -ENOMEM;

	pmic->dev = dev;



	pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!pmic->res)

		return -ENOENT;



	base = devm_ioremap_resource(dev, pmic->res);

	if (!base)

		return -ENOMEM;



	pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,

						 &hi655x_regmap_config);



	regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver);

	if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) {

		dev_warn(dev, "PMU version %d unsupported\n", pmic->ver);

		return -EINVAL;

	}



	hi655x_local_irq_clear(pmic->regmap);



	pmic->gpio = of_get_named_gpio(np, "pmic-gpios", 0);

	if (!gpio_is_valid(pmic->gpio)) {

		dev_err(dev, "Failed to get the pmic-gpios\n");

		return -ENODEV;

	}



	ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN,

				    "hi655x_pmic_irq");

	if (ret < 0) {

		dev_err(dev, "Failed to request gpio %d  ret = %d\n",

			pmic->gpio, ret);

		return ret;

	}



	ret = regmap_add_irq_chip(pmic->regmap, gpio_to_irq(pmic->gpio),

				  IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0,

				  &hi655x_irq_chip, &pmic->irq_data);

	if (ret) {

		dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret);

		return ret;

	}



	platform_set_drvdata(pdev, pmic);



	ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs,

			      ARRAY_SIZE(hi655x_pmic_devs), NULL, 0, NULL);

	if (ret) {

		dev_err(dev, "Failed to register device %d\n", ret);

		regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data);

		return ret;

	}



	return 0;

}



static int hi655x_pmic_remove(struct platform_device *pdev)

{

	struct hi655x_pmic *pmic = platform_get_drvdata(pdev);



	regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data);

	mfd_remove_devices(&pdev->dev);

	return 0;

}



static const struct of_device_id hi655x_pmic_match[] = {

	{ .compatible = "hisilicon,hi655x-pmic", },

	{},

};



static struct platform_driver hi655x_pmic_driver = {

	.driver	= {

		.name =	"hi655x-pmic",

		.of_match_table = of_match_ptr(hi655x_pmic_match),

	},

	.probe  = hi655x_pmic_probe,

	.remove = hi655x_pmic_remove,

};

module_platform_driver(hi655x_pmic_driver);



MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");

MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver");

MODULE_LICENSE("GPL v2");

include/linux/mfd/hi655x-pmic.h

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/*

 * Device driver for regulators in hi655x IC

 *

 * Copyright (c) 2016 Hisilicon.

 *

 * Authors:

 * Chen Feng <puck.chen@hisilicon.com>

 * Fei  Wang <w.f@huawei.com>

 *

 * 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 __HI655X_PMIC_H

#define __HI655X_PMIC_H



/* Hi655x registers are mapped to memory bus in 4 bytes stride */

#define HI655X_STRIDE                   4

#define HI655X_BUS_ADDR(x)              ((x) << 2)



#define HI655X_BITS                     8



#define HI655X_NR_IRQ                   32



#define HI655X_IRQ_STAT_BASE            (0x003 << 2)

#define HI655X_IRQ_MASK_BASE            (0x007 << 2)

#define HI655X_ANA_IRQM_BASE            (0x1b5 << 2)

#define HI655X_IRQ_ARRAY                4

#define HI655X_IRQ_MASK                 0xFF

#define HI655X_IRQ_CLR                  0xFF

#define HI655X_VER_REG                  0x00



#define PMU_VER_START                   0x10

#define PMU_VER_END                     0x38



#define RESERVE_INT                     BIT(7)

#define PWRON_D20R_INT                  BIT(6)

#define PWRON_D20F_INT                  BIT(5)

#define PWRON_D4SR_INT                  BIT(4)

#define VSYS_6P0_D200UR_INT             BIT(3)

#define VSYS_UV_D3R_INT                 BIT(2)

#define VSYS_2P5_R_INT                  BIT(1)

#define OTMP_D1R_INT                    BIT(0)



struct hi655x_pmic {

	struct resource *res;

	struct device *dev;

	struct regmap *regmap;

	int gpio;

	unsigned int ver;

	struct regmap_irq_chip_data *irq_data;

};



#endif