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drivers/mfd/hi655x-pmic.c
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81f7e3824 Initial Release, ... |
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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 regmap_irq hi655x_irqs[] = { { .reg_offset = 0, .mask = OTMP_D1R_INT_MASK }, { .reg_offset = 0, .mask = VSYS_2P5_R_INT_MASK }, { .reg_offset = 0, .mask = VSYS_UV_D3R_INT_MASK }, { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT_MASK }, { .reg_offset = 0, .mask = PWRON_D4SR_INT_MASK }, { .reg_offset = 0, .mask = PWRON_D20F_INT_MASK }, { .reg_offset = 0, .mask = PWRON_D20R_INT_MASK }, { .reg_offset = 0, .mask = RESERVE_INT_MASK }, }; 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, .ack_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(0x400) - HI655X_STRIDE, }; static struct resource pwrkey_resources[] = { { .name = "down", .start = PWRON_D20R_INT, .end = PWRON_D20R_INT, .flags = IORESOURCE_IRQ, }, { .name = "up", .start = PWRON_D20F_INT, .end = PWRON_D20F_INT, .flags = IORESOURCE_IRQ, }, { .name = "hold 4s", .start = PWRON_D4SR_INT, .end = PWRON_D4SR_INT, .flags = IORESOURCE_IRQ, }, }; static const struct mfd_cell hi655x_pmic_devs[] = { { .name = "hi65xx-powerkey", .num_resources = ARRAY_SIZE(pwrkey_resources), .resources = &pwrkey_resources[0], }, { .name = "hi655x-regulator", }, { .name = "hi655x-clk", }, }; 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); base = devm_ioremap_resource(dev, pmic->res); if (IS_ERR(base)) return PTR_ERR(base); 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 ", 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 "); 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 ", 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 ", 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, regmap_irq_get_domain(pmic->irq_data)); if (ret) { dev_err(dev, "Failed to register device %d ", 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", }, {}, }; MODULE_DEVICE_TABLE(of, hi655x_pmic_match); 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"); |