1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Device driver for MFD hi655x PMIC 4 * 5 * Copyright (c) 2016 Hisilicon. 6 * 7 * Authors: 8 * Chen Feng <puck.chen@hisilicon.com> 9 * Fei Wang <w.f@huawei.com> 10 */ 11 12 #include <linux/gpio.h> 13 #include <linux/io.h> 14 #include <linux/interrupt.h> 15 #include <linux/init.h> 16 #include <linux/mfd/core.h> 17 #include <linux/mfd/hi655x-pmic.h> 18 #include <linux/module.h> 19 #include <linux/of_gpio.h> 20 #include <linux/of_platform.h> 21 #include <linux/platform_device.h> 22 #include <linux/regmap.h> 23 24 static const struct regmap_irq hi655x_irqs[] = { 25 { .reg_offset = 0, .mask = OTMP_D1R_INT_MASK }, 26 { .reg_offset = 0, .mask = VSYS_2P5_R_INT_MASK }, 27 { .reg_offset = 0, .mask = VSYS_UV_D3R_INT_MASK }, 28 { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT_MASK }, 29 { .reg_offset = 0, .mask = PWRON_D4SR_INT_MASK }, 30 { .reg_offset = 0, .mask = PWRON_D20F_INT_MASK }, 31 { .reg_offset = 0, .mask = PWRON_D20R_INT_MASK }, 32 { .reg_offset = 0, .mask = RESERVE_INT_MASK }, 33 }; 34 35 static const struct regmap_irq_chip hi655x_irq_chip = { 36 .name = "hi655x-pmic", 37 .irqs = hi655x_irqs, 38 .num_regs = 1, 39 .num_irqs = ARRAY_SIZE(hi655x_irqs), 40 .status_base = HI655X_IRQ_STAT_BASE, 41 .ack_base = HI655X_IRQ_STAT_BASE, 42 .mask_base = HI655X_IRQ_MASK_BASE, 43 }; 44 45 static struct regmap_config hi655x_regmap_config = { 46 .reg_bits = 32, 47 .reg_stride = HI655X_STRIDE, 48 .val_bits = 8, 49 .max_register = HI655X_BUS_ADDR(0x400) - HI655X_STRIDE, 50 }; 51 52 static const struct resource pwrkey_resources[] = { 53 { 54 .name = "down", 55 .start = PWRON_D20R_INT, 56 .end = PWRON_D20R_INT, 57 .flags = IORESOURCE_IRQ, 58 }, { 59 .name = "up", 60 .start = PWRON_D20F_INT, 61 .end = PWRON_D20F_INT, 62 .flags = IORESOURCE_IRQ, 63 }, { 64 .name = "hold 4s", 65 .start = PWRON_D4SR_INT, 66 .end = PWRON_D4SR_INT, 67 .flags = IORESOURCE_IRQ, 68 }, 69 }; 70 71 static const struct mfd_cell hi655x_pmic_devs[] = { 72 { 73 .name = "hi65xx-powerkey", 74 .num_resources = ARRAY_SIZE(pwrkey_resources), 75 .resources = &pwrkey_resources[0], 76 }, 77 { .name = "hi655x-regulator", }, 78 { .name = "hi655x-clk", }, 79 }; 80 81 static void hi655x_local_irq_clear(struct regmap *map) 82 { 83 int i; 84 85 regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR); 86 for (i = 0; i < HI655X_IRQ_ARRAY; i++) { 87 regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE, 88 HI655X_IRQ_CLR); 89 } 90 } 91 92 static int hi655x_pmic_probe(struct platform_device *pdev) 93 { 94 int ret; 95 struct hi655x_pmic *pmic; 96 struct device *dev = &pdev->dev; 97 struct device_node *np = dev->of_node; 98 void __iomem *base; 99 100 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); 101 if (!pmic) 102 return -ENOMEM; 103 pmic->dev = dev; 104 105 pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 106 base = devm_ioremap_resource(dev, pmic->res); 107 if (IS_ERR(base)) 108 return PTR_ERR(base); 109 110 pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base, 111 &hi655x_regmap_config); 112 if (IS_ERR(pmic->regmap)) 113 return PTR_ERR(pmic->regmap); 114 115 regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver); 116 if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) { 117 dev_warn(dev, "PMU version %d unsupported\n", pmic->ver); 118 return -EINVAL; 119 } 120 121 hi655x_local_irq_clear(pmic->regmap); 122 123 pmic->gpio = of_get_named_gpio(np, "pmic-gpios", 0); 124 if (!gpio_is_valid(pmic->gpio)) { 125 dev_err(dev, "Failed to get the pmic-gpios\n"); 126 return -ENODEV; 127 } 128 129 ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN, 130 "hi655x_pmic_irq"); 131 if (ret < 0) { 132 dev_err(dev, "Failed to request gpio %d ret = %d\n", 133 pmic->gpio, ret); 134 return ret; 135 } 136 137 ret = regmap_add_irq_chip(pmic->regmap, gpio_to_irq(pmic->gpio), 138 IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0, 139 &hi655x_irq_chip, &pmic->irq_data); 140 if (ret) { 141 dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret); 142 return ret; 143 } 144 145 platform_set_drvdata(pdev, pmic); 146 147 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs, 148 ARRAY_SIZE(hi655x_pmic_devs), NULL, 0, 149 regmap_irq_get_domain(pmic->irq_data)); 150 if (ret) { 151 dev_err(dev, "Failed to register device %d\n", ret); 152 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data); 153 return ret; 154 } 155 156 return 0; 157 } 158 159 static int hi655x_pmic_remove(struct platform_device *pdev) 160 { 161 struct hi655x_pmic *pmic = platform_get_drvdata(pdev); 162 163 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data); 164 mfd_remove_devices(&pdev->dev); 165 return 0; 166 } 167 168 static const struct of_device_id hi655x_pmic_match[] = { 169 { .compatible = "hisilicon,hi655x-pmic", }, 170 {}, 171 }; 172 MODULE_DEVICE_TABLE(of, hi655x_pmic_match); 173 174 static struct platform_driver hi655x_pmic_driver = { 175 .driver = { 176 .name = "hi655x-pmic", 177 .of_match_table = of_match_ptr(hi655x_pmic_match), 178 }, 179 .probe = hi655x_pmic_probe, 180 .remove = hi655x_pmic_remove, 181 }; 182 module_platform_driver(hi655x_pmic_driver); 183 184 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>"); 185 MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver"); 186 MODULE_LICENSE("GPL v2"); 187