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Release 4.7 drivers/mfd/hi655x-pmic.c

Directory: drivers/mfd
/*
 * 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); } }

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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; }

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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; }

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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");

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Directory: drivers/mfd
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