1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017 Spreadtrum Communications Inc. 4 */ 5 6 #include <linux/interrupt.h> 7 #include <linux/kernel.h> 8 #include <linux/module.h> 9 #include <linux/mfd/core.h> 10 #include <linux/of_device.h> 11 #include <linux/regmap.h> 12 #include <linux/spi/spi.h> 13 #include <uapi/linux/usb/charger.h> 14 15 #define SPRD_PMIC_INT_MASK_STATUS 0x0 16 #define SPRD_PMIC_INT_RAW_STATUS 0x4 17 #define SPRD_PMIC_INT_EN 0x8 18 19 #define SPRD_SC2731_IRQ_BASE 0x140 20 #define SPRD_SC2731_IRQ_NUMS 16 21 #define SPRD_SC2731_CHG_DET 0xedc 22 23 /* PMIC charger detection definition */ 24 #define SPRD_PMIC_CHG_DET_DELAY_US 200000 25 #define SPRD_PMIC_CHG_DET_TIMEOUT 2000000 26 #define SPRD_PMIC_CHG_DET_DONE BIT(11) 27 #define SPRD_PMIC_SDP_TYPE BIT(7) 28 #define SPRD_PMIC_DCP_TYPE BIT(6) 29 #define SPRD_PMIC_CDP_TYPE BIT(5) 30 #define SPRD_PMIC_CHG_TYPE_MASK GENMASK(7, 5) 31 32 struct sprd_pmic { 33 struct regmap *regmap; 34 struct device *dev; 35 struct regmap_irq *irqs; 36 struct regmap_irq_chip irq_chip; 37 struct regmap_irq_chip_data *irq_data; 38 const struct sprd_pmic_data *pdata; 39 int irq; 40 }; 41 42 struct sprd_pmic_data { 43 u32 irq_base; 44 u32 num_irqs; 45 u32 charger_det; 46 }; 47 48 /* 49 * Since different PMICs of SC27xx series can have different interrupt 50 * base address and irq number, we should save irq number and irq base 51 * in the device data structure. 52 */ 53 static const struct sprd_pmic_data sc2731_data = { 54 .irq_base = SPRD_SC2731_IRQ_BASE, 55 .num_irqs = SPRD_SC2731_IRQ_NUMS, 56 .charger_det = SPRD_SC2731_CHG_DET, 57 }; 58 59 enum usb_charger_type sprd_pmic_detect_charger_type(struct device *dev) 60 { 61 struct spi_device *spi = to_spi_device(dev); 62 struct sprd_pmic *ddata = spi_get_drvdata(spi); 63 const struct sprd_pmic_data *pdata = ddata->pdata; 64 enum usb_charger_type type; 65 u32 val; 66 int ret; 67 68 ret = regmap_read_poll_timeout(ddata->regmap, pdata->charger_det, val, 69 (val & SPRD_PMIC_CHG_DET_DONE), 70 SPRD_PMIC_CHG_DET_DELAY_US, 71 SPRD_PMIC_CHG_DET_TIMEOUT); 72 if (ret) { 73 dev_err(&spi->dev, "failed to detect charger type\n"); 74 return UNKNOWN_TYPE; 75 } 76 77 switch (val & SPRD_PMIC_CHG_TYPE_MASK) { 78 case SPRD_PMIC_CDP_TYPE: 79 type = CDP_TYPE; 80 break; 81 case SPRD_PMIC_DCP_TYPE: 82 type = DCP_TYPE; 83 break; 84 case SPRD_PMIC_SDP_TYPE: 85 type = SDP_TYPE; 86 break; 87 default: 88 type = UNKNOWN_TYPE; 89 break; 90 } 91 92 return type; 93 } 94 EXPORT_SYMBOL_GPL(sprd_pmic_detect_charger_type); 95 96 static const struct mfd_cell sprd_pmic_devs[] = { 97 { 98 .name = "sc27xx-wdt", 99 .of_compatible = "sprd,sc2731-wdt", 100 }, { 101 .name = "sc27xx-rtc", 102 .of_compatible = "sprd,sc2731-rtc", 103 }, { 104 .name = "sc27xx-charger", 105 .of_compatible = "sprd,sc2731-charger", 106 }, { 107 .name = "sc27xx-chg-timer", 108 .of_compatible = "sprd,sc2731-chg-timer", 109 }, { 110 .name = "sc27xx-fast-chg", 111 .of_compatible = "sprd,sc2731-fast-chg", 112 }, { 113 .name = "sc27xx-chg-wdt", 114 .of_compatible = "sprd,sc2731-chg-wdt", 115 }, { 116 .name = "sc27xx-typec", 117 .of_compatible = "sprd,sc2731-typec", 118 }, { 119 .name = "sc27xx-flash", 120 .of_compatible = "sprd,sc2731-flash", 121 }, { 122 .name = "sc27xx-eic", 123 .of_compatible = "sprd,sc2731-eic", 124 }, { 125 .name = "sc27xx-efuse", 126 .of_compatible = "sprd,sc2731-efuse", 127 }, { 128 .name = "sc27xx-thermal", 129 .of_compatible = "sprd,sc2731-thermal", 130 }, { 131 .name = "sc27xx-adc", 132 .of_compatible = "sprd,sc2731-adc", 133 }, { 134 .name = "sc27xx-audio-codec", 135 .of_compatible = "sprd,sc2731-audio-codec", 136 }, { 137 .name = "sc27xx-regulator", 138 .of_compatible = "sprd,sc2731-regulator", 139 }, { 140 .name = "sc27xx-vibrator", 141 .of_compatible = "sprd,sc2731-vibrator", 142 }, { 143 .name = "sc27xx-keypad-led", 144 .of_compatible = "sprd,sc2731-keypad-led", 145 }, { 146 .name = "sc27xx-bltc", 147 .of_compatible = "sprd,sc2731-bltc", 148 }, { 149 .name = "sc27xx-fgu", 150 .of_compatible = "sprd,sc2731-fgu", 151 }, { 152 .name = "sc27xx-7sreset", 153 .of_compatible = "sprd,sc2731-7sreset", 154 }, { 155 .name = "sc27xx-poweroff", 156 .of_compatible = "sprd,sc2731-poweroff", 157 }, { 158 .name = "sc27xx-syscon", 159 .of_compatible = "sprd,sc2731-syscon", 160 }, 161 }; 162 163 static int sprd_pmic_spi_write(void *context, const void *data, size_t count) 164 { 165 struct device *dev = context; 166 struct spi_device *spi = to_spi_device(dev); 167 168 return spi_write(spi, data, count); 169 } 170 171 static int sprd_pmic_spi_read(void *context, 172 const void *reg, size_t reg_size, 173 void *val, size_t val_size) 174 { 175 struct device *dev = context; 176 struct spi_device *spi = to_spi_device(dev); 177 u32 rx_buf[2] = { 0 }; 178 int ret; 179 180 /* Now we only support one PMIC register to read every time. */ 181 if (reg_size != sizeof(u32) || val_size != sizeof(u32)) 182 return -EINVAL; 183 184 /* Copy address to read from into first element of SPI buffer. */ 185 memcpy(rx_buf, reg, sizeof(u32)); 186 ret = spi_read(spi, rx_buf, 1); 187 if (ret < 0) 188 return ret; 189 190 memcpy(val, rx_buf, val_size); 191 return 0; 192 } 193 194 static struct regmap_bus sprd_pmic_regmap = { 195 .write = sprd_pmic_spi_write, 196 .read = sprd_pmic_spi_read, 197 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, 198 .val_format_endian_default = REGMAP_ENDIAN_NATIVE, 199 }; 200 201 static const struct regmap_config sprd_pmic_config = { 202 .reg_bits = 32, 203 .val_bits = 32, 204 .reg_stride = 4, 205 .max_register = 0xffff, 206 }; 207 208 static int sprd_pmic_probe(struct spi_device *spi) 209 { 210 struct sprd_pmic *ddata; 211 const struct sprd_pmic_data *pdata; 212 int ret, i; 213 214 pdata = of_device_get_match_data(&spi->dev); 215 if (!pdata) { 216 dev_err(&spi->dev, "No matching driver data found\n"); 217 return -EINVAL; 218 } 219 220 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); 221 if (!ddata) 222 return -ENOMEM; 223 224 ddata->regmap = devm_regmap_init(&spi->dev, &sprd_pmic_regmap, 225 &spi->dev, &sprd_pmic_config); 226 if (IS_ERR(ddata->regmap)) { 227 ret = PTR_ERR(ddata->regmap); 228 dev_err(&spi->dev, "Failed to allocate register map %d\n", ret); 229 return ret; 230 } 231 232 spi_set_drvdata(spi, ddata); 233 ddata->dev = &spi->dev; 234 ddata->irq = spi->irq; 235 ddata->pdata = pdata; 236 237 ddata->irq_chip.name = dev_name(&spi->dev); 238 ddata->irq_chip.status_base = 239 pdata->irq_base + SPRD_PMIC_INT_MASK_STATUS; 240 ddata->irq_chip.mask_base = pdata->irq_base + SPRD_PMIC_INT_EN; 241 ddata->irq_chip.ack_base = 0; 242 ddata->irq_chip.num_regs = 1; 243 ddata->irq_chip.num_irqs = pdata->num_irqs; 244 ddata->irq_chip.mask_invert = true; 245 246 ddata->irqs = devm_kcalloc(&spi->dev, 247 pdata->num_irqs, sizeof(struct regmap_irq), 248 GFP_KERNEL); 249 if (!ddata->irqs) 250 return -ENOMEM; 251 252 ddata->irq_chip.irqs = ddata->irqs; 253 for (i = 0; i < pdata->num_irqs; i++) { 254 ddata->irqs[i].reg_offset = i / pdata->num_irqs; 255 ddata->irqs[i].mask = BIT(i % pdata->num_irqs); 256 } 257 258 ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq, 259 IRQF_ONESHOT | IRQF_NO_SUSPEND, 0, 260 &ddata->irq_chip, &ddata->irq_data); 261 if (ret) { 262 dev_err(&spi->dev, "Failed to add PMIC irq chip %d\n", ret); 263 return ret; 264 } 265 266 ret = devm_mfd_add_devices(&spi->dev, PLATFORM_DEVID_AUTO, 267 sprd_pmic_devs, ARRAY_SIZE(sprd_pmic_devs), 268 NULL, 0, 269 regmap_irq_get_domain(ddata->irq_data)); 270 if (ret) { 271 dev_err(&spi->dev, "Failed to register device %d\n", ret); 272 return ret; 273 } 274 275 return 0; 276 } 277 278 static const struct of_device_id sprd_pmic_match[] = { 279 { .compatible = "sprd,sc2731", .data = &sc2731_data }, 280 {}, 281 }; 282 MODULE_DEVICE_TABLE(of, sprd_pmic_match); 283 284 static struct spi_driver sprd_pmic_driver = { 285 .driver = { 286 .name = "sc27xx-pmic", 287 .of_match_table = sprd_pmic_match, 288 }, 289 .probe = sprd_pmic_probe, 290 }; 291 292 static int __init sprd_pmic_init(void) 293 { 294 return spi_register_driver(&sprd_pmic_driver); 295 } 296 subsys_initcall(sprd_pmic_init); 297 298 static void __exit sprd_pmic_exit(void) 299 { 300 spi_unregister_driver(&sprd_pmic_driver); 301 } 302 module_exit(sprd_pmic_exit); 303 304 MODULE_LICENSE("GPL v2"); 305 MODULE_DESCRIPTION("Spreadtrum SC27xx PMICs driver"); 306 MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>"); 307