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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Device driver for MFD hi655x PMIC4 *5 * Copyright (c) 2016 HiSilicon Ltd.6 *7 * Authors:8 * Chen Feng <puck.chen@hisilicon.com>9 * Fei Wang <w.f@huawei.com>10 */11 12#include <linux/io.h>13#include <linux/interrupt.h>14#include <linux/init.h>15#include <linux/mfd/core.h>16#include <linux/mfd/hi655x-pmic.h>17#include <linux/module.h>18#include <linux/gpio/consumer.h>19#include <linux/mod_devicetable.h>20#include <linux/platform_device.h>21#include <linux/regmap.h>22 23static const struct regmap_irq hi655x_irqs[] = {24 { .reg_offset = 0, .mask = OTMP_D1R_INT_MASK },25 { .reg_offset = 0, .mask = VSYS_2P5_R_INT_MASK },26 { .reg_offset = 0, .mask = VSYS_UV_D3R_INT_MASK },27 { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT_MASK },28 { .reg_offset = 0, .mask = PWRON_D4SR_INT_MASK },29 { .reg_offset = 0, .mask = PWRON_D20F_INT_MASK },30 { .reg_offset = 0, .mask = PWRON_D20R_INT_MASK },31 { .reg_offset = 0, .mask = RESERVE_INT_MASK },32};33 34static const struct regmap_irq_chip hi655x_irq_chip = {35 .name = "hi655x-pmic",36 .irqs = hi655x_irqs,37 .num_regs = 1,38 .num_irqs = ARRAY_SIZE(hi655x_irqs),39 .status_base = HI655X_IRQ_STAT_BASE,40 .ack_base = HI655X_IRQ_STAT_BASE,41 .mask_base = HI655X_IRQ_MASK_BASE,42};43 44static const struct regmap_config hi655x_regmap_config = {45 .reg_bits = 32,46 .reg_stride = HI655X_STRIDE,47 .val_bits = 8,48 .max_register = HI655X_BUS_ADDR(0x400) - HI655X_STRIDE,49};50 51static const struct resource pwrkey_resources[] = {52 {53 .name = "down",54 .start = PWRON_D20R_INT,55 .end = PWRON_D20R_INT,56 .flags = IORESOURCE_IRQ,57 }, {58 .name = "up",59 .start = PWRON_D20F_INT,60 .end = PWRON_D20F_INT,61 .flags = IORESOURCE_IRQ,62 }, {63 .name = "hold 4s",64 .start = PWRON_D4SR_INT,65 .end = PWRON_D4SR_INT,66 .flags = IORESOURCE_IRQ,67 },68};69 70static const struct mfd_cell hi655x_pmic_devs[] = {71 {72 .name = "hi65xx-powerkey",73 .num_resources = ARRAY_SIZE(pwrkey_resources),74 .resources = &pwrkey_resources[0],75 },76 { .name = "hi655x-regulator", },77 { .name = "hi655x-clk", },78};79 80static void hi655x_local_irq_clear(struct regmap *map)81{82 int i;83 84 regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR);85 for (i = 0; i < HI655X_IRQ_ARRAY; i++) {86 regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE,87 HI655X_IRQ_CLR);88 }89}90 91static int hi655x_pmic_probe(struct platform_device *pdev)92{93 int ret;94 struct hi655x_pmic *pmic;95 struct device *dev = &pdev->dev;96 void __iomem *base;97 98 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);99 if (!pmic)100 return -ENOMEM;101 pmic->dev = dev;102 103 base = devm_platform_ioremap_resource(pdev, 0);104 if (IS_ERR(base))105 return PTR_ERR(base);106 107 pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,108 &hi655x_regmap_config);109 if (IS_ERR(pmic->regmap))110 return PTR_ERR(pmic->regmap);111 112 regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver);113 if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) {114 dev_warn(dev, "PMU version %d unsupported\n", pmic->ver);115 return -EINVAL;116 }117 118 hi655x_local_irq_clear(pmic->regmap);119 120 pmic->gpio = devm_gpiod_get_optional(dev, "pmic", GPIOD_IN);121 if (IS_ERR(pmic->gpio))122 return dev_err_probe(dev, PTR_ERR(pmic->gpio),123 "Failed to request hi655x pmic-gpio");124 125 ret = regmap_add_irq_chip(pmic->regmap, gpiod_to_irq(pmic->gpio),126 IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0,127 &hi655x_irq_chip, &pmic->irq_data);128 if (ret) {129 dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret);130 return ret;131 }132 133 platform_set_drvdata(pdev, pmic);134 135 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs,136 ARRAY_SIZE(hi655x_pmic_devs), NULL, 0,137 regmap_irq_get_domain(pmic->irq_data));138 if (ret) {139 dev_err(dev, "Failed to register device %d\n", ret);140 regmap_del_irq_chip(gpiod_to_irq(pmic->gpio), pmic->irq_data);141 return ret;142 }143 144 return 0;145}146 147static void hi655x_pmic_remove(struct platform_device *pdev)148{149 struct hi655x_pmic *pmic = platform_get_drvdata(pdev);150 151 regmap_del_irq_chip(gpiod_to_irq(pmic->gpio), pmic->irq_data);152 mfd_remove_devices(&pdev->dev);153}154 155static const struct of_device_id hi655x_pmic_match[] = {156 { .compatible = "hisilicon,hi655x-pmic", },157 {},158};159MODULE_DEVICE_TABLE(of, hi655x_pmic_match);160 161static struct platform_driver hi655x_pmic_driver = {162 .driver = {163 .name = "hi655x-pmic",164 .of_match_table = hi655x_pmic_match,165 },166 .probe = hi655x_pmic_probe,167 .remove_new = hi655x_pmic_remove,168};169module_platform_driver(hi655x_pmic_driver);170 171MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");172MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver");173MODULE_LICENSE("GPL v2");174