1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Device driver for MFD hi655x PMIC 4 * 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 23 static 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 34 static 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 44 static 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 51 static 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 70 static 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 80 static 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 91 static 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 } 146 147 static 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 } 154 155 static const struct of_device_id hi655x_pmic_match[] = { 156 { .compatible = "hisilicon,hi655x-pmic", }, 157 {}, 158 }; 159 MODULE_DEVICE_TABLE(of, hi655x_pmic_match); 160 161 static 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 }; 169 module_platform_driver(hi655x_pmic_driver); 170 171 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>"); 172 MODULE_DESCRIPTION("Hisilicon hi655x PMIC driver"); 173 MODULE_LICENSE("GPL v2"); 174