1 /* 2 * Device driver for MFD hi655x PMIC 3 * 4 * Copyright (c) 2016 Hisilicon. 5 * 6 * Authors: 7 * Chen Feng <puck.chen@hisilicon.com> 8 * Fei Wang <w.f@huawei.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/gpio.h> 16 #include <linux/io.h> 17 #include <linux/interrupt.h> 18 #include <linux/init.h> 19 #include <linux/mfd/core.h> 20 #include <linux/mfd/hi655x-pmic.h> 21 #include <linux/module.h> 22 #include <linux/of_gpio.h> 23 #include <linux/of_platform.h> 24 #include <linux/platform_device.h> 25 #include <linux/regmap.h> 26 27 static const struct regmap_irq hi655x_irqs[] = { 28 { .reg_offset = 0, .mask = OTMP_D1R_INT_MASK }, 29 { .reg_offset = 0, .mask = VSYS_2P5_R_INT_MASK }, 30 { .reg_offset = 0, .mask = VSYS_UV_D3R_INT_MASK }, 31 { .reg_offset = 0, .mask = VSYS_6P0_D200UR_INT_MASK }, 32 { .reg_offset = 0, .mask = PWRON_D4SR_INT_MASK }, 33 { .reg_offset = 0, .mask = PWRON_D20F_INT_MASK }, 34 { .reg_offset = 0, .mask = PWRON_D20R_INT_MASK }, 35 { .reg_offset = 0, .mask = RESERVE_INT_MASK }, 36 }; 37 38 static const struct regmap_irq_chip hi655x_irq_chip = { 39 .name = "hi655x-pmic", 40 .irqs = hi655x_irqs, 41 .num_regs = 1, 42 .num_irqs = ARRAY_SIZE(hi655x_irqs), 43 .status_base = HI655X_IRQ_STAT_BASE, 44 .ack_base = HI655X_IRQ_STAT_BASE, 45 .mask_base = HI655X_IRQ_MASK_BASE, 46 }; 47 48 static struct regmap_config hi655x_regmap_config = { 49 .reg_bits = 32, 50 .reg_stride = HI655X_STRIDE, 51 .val_bits = 8, 52 .max_register = HI655X_BUS_ADDR(0x400) - HI655X_STRIDE, 53 }; 54 55 static struct resource pwrkey_resources[] = { 56 { 57 .name = "down", 58 .start = PWRON_D20R_INT, 59 .end = PWRON_D20R_INT, 60 .flags = IORESOURCE_IRQ, 61 }, { 62 .name = "up", 63 .start = PWRON_D20F_INT, 64 .end = PWRON_D20F_INT, 65 .flags = IORESOURCE_IRQ, 66 }, { 67 .name = "hold 4s", 68 .start = PWRON_D4SR_INT, 69 .end = PWRON_D4SR_INT, 70 .flags = IORESOURCE_IRQ, 71 }, 72 }; 73 74 static const struct mfd_cell hi655x_pmic_devs[] = { 75 { 76 .name = "hi65xx-powerkey", 77 .num_resources = ARRAY_SIZE(pwrkey_resources), 78 .resources = &pwrkey_resources[0], 79 }, 80 { .name = "hi655x-regulator", }, 81 { .name = "hi655x-clk", }, 82 }; 83 84 static void hi655x_local_irq_clear(struct regmap *map) 85 { 86 int i; 87 88 regmap_write(map, HI655X_ANA_IRQM_BASE, HI655X_IRQ_CLR); 89 for (i = 0; i < HI655X_IRQ_ARRAY; i++) { 90 regmap_write(map, HI655X_IRQ_STAT_BASE + i * HI655X_STRIDE, 91 HI655X_IRQ_CLR); 92 } 93 } 94 95 static int hi655x_pmic_probe(struct platform_device *pdev) 96 { 97 int ret; 98 struct hi655x_pmic *pmic; 99 struct device *dev = &pdev->dev; 100 struct device_node *np = dev->of_node; 101 void __iomem *base; 102 103 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL); 104 if (!pmic) 105 return -ENOMEM; 106 pmic->dev = dev; 107 108 pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 109 base = devm_ioremap_resource(dev, pmic->res); 110 if (IS_ERR(base)) 111 return PTR_ERR(base); 112 113 pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base, 114 &hi655x_regmap_config); 115 116 regmap_read(pmic->regmap, HI655X_BUS_ADDR(HI655X_VER_REG), &pmic->ver); 117 if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) { 118 dev_warn(dev, "PMU version %d unsupported\n", pmic->ver); 119 return -EINVAL; 120 } 121 122 hi655x_local_irq_clear(pmic->regmap); 123 124 pmic->gpio = of_get_named_gpio(np, "pmic-gpios", 0); 125 if (!gpio_is_valid(pmic->gpio)) { 126 dev_err(dev, "Failed to get the pmic-gpios\n"); 127 return -ENODEV; 128 } 129 130 ret = devm_gpio_request_one(dev, pmic->gpio, GPIOF_IN, 131 "hi655x_pmic_irq"); 132 if (ret < 0) { 133 dev_err(dev, "Failed to request gpio %d ret = %d\n", 134 pmic->gpio, ret); 135 return ret; 136 } 137 138 ret = regmap_add_irq_chip(pmic->regmap, gpio_to_irq(pmic->gpio), 139 IRQF_TRIGGER_LOW | IRQF_NO_SUSPEND, 0, 140 &hi655x_irq_chip, &pmic->irq_data); 141 if (ret) { 142 dev_err(dev, "Failed to obtain 'hi655x_pmic_irq' %d\n", ret); 143 return ret; 144 } 145 146 platform_set_drvdata(pdev, pmic); 147 148 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, hi655x_pmic_devs, 149 ARRAY_SIZE(hi655x_pmic_devs), NULL, 0, 150 regmap_irq_get_domain(pmic->irq_data)); 151 if (ret) { 152 dev_err(dev, "Failed to register device %d\n", ret); 153 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data); 154 return ret; 155 } 156 157 return 0; 158 } 159 160 static int hi655x_pmic_remove(struct platform_device *pdev) 161 { 162 struct hi655x_pmic *pmic = platform_get_drvdata(pdev); 163 164 regmap_del_irq_chip(gpio_to_irq(pmic->gpio), pmic->irq_data); 165 mfd_remove_devices(&pdev->dev); 166 return 0; 167 } 168 169 static const struct of_device_id hi655x_pmic_match[] = { 170 { .compatible = "hisilicon,hi655x-pmic", }, 171 {}, 172 }; 173 MODULE_DEVICE_TABLE(of, hi655x_pmic_match); 174 175 static struct platform_driver hi655x_pmic_driver = { 176 .driver = { 177 .name = "hi655x-pmic", 178 .of_match_table = of_match_ptr(hi655x_pmic_match), 179 }, 180 .probe = hi655x_pmic_probe, 181 .remove = hi655x_pmic_remove, 182 }; 183 module_platform_driver(hi655x_pmic_driver); 184 185 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>"); 186 MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver"); 187 MODULE_LICENSE("GPL v2"); 188