1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * PCAP2 Regulator Driver 4 * 5 * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/init.h> 11 #include <linux/err.h> 12 #include <linux/platform_device.h> 13 #include <linux/regulator/driver.h> 14 #include <linux/regulator/machine.h> 15 #include <linux/mfd/ezx-pcap.h> 16 17 static const unsigned int V1_table[] = { 18 2775000, 1275000, 1600000, 1725000, 1825000, 1925000, 2075000, 2275000, 19 }; 20 21 static const unsigned int V2_table[] = { 22 2500000, 2775000, 23 }; 24 25 static const unsigned int V3_table[] = { 26 1075000, 1275000, 1550000, 1725000, 1876000, 1950000, 2075000, 2275000, 27 }; 28 29 static const unsigned int V4_table[] = { 30 1275000, 1550000, 1725000, 1875000, 1950000, 2075000, 2275000, 2775000, 31 }; 32 33 static const unsigned int V5_table[] = { 34 1875000, 2275000, 2475000, 2775000, 35 }; 36 37 static const unsigned int V6_table[] = { 38 2475000, 2775000, 39 }; 40 41 static const unsigned int V7_table[] = { 42 1875000, 2775000, 43 }; 44 45 #define V8_table V4_table 46 47 static const unsigned int V9_table[] = { 48 1575000, 1875000, 2475000, 2775000, 49 }; 50 51 static const unsigned int V10_table[] = { 52 5000000, 53 }; 54 55 static const unsigned int VAUX1_table[] = { 56 1875000, 2475000, 2775000, 3000000, 57 }; 58 59 #define VAUX2_table VAUX1_table 60 61 static const unsigned int VAUX3_table[] = { 62 1200000, 1200000, 1200000, 1200000, 1400000, 1600000, 1800000, 2000000, 63 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 64 }; 65 66 static const unsigned int VAUX4_table[] = { 67 1800000, 1800000, 3000000, 5000000, 68 }; 69 70 static const unsigned int VSIM_table[] = { 71 1875000, 3000000, 72 }; 73 74 static const unsigned int VSIM2_table[] = { 75 1875000, 76 }; 77 78 static const unsigned int VVIB_table[] = { 79 1300000, 1800000, 2000000, 3000000, 80 }; 81 82 static const unsigned int SW1_table[] = { 83 900000, 950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 84 1300000, 1350000, 1400000, 1450000, 1500000, 1600000, 1875000, 2250000, 85 }; 86 87 #define SW2_table SW1_table 88 89 struct pcap_regulator { 90 const u8 reg; 91 const u8 en; 92 const u8 index; 93 const u8 stby; 94 const u8 lowpwr; 95 }; 96 97 #define NA 0xff 98 99 #define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr) \ 100 [_vreg] = { \ 101 .reg = _reg, \ 102 .en = _en, \ 103 .index = _index, \ 104 .stby = _stby, \ 105 .lowpwr = _lowpwr, \ 106 } 107 108 static const struct pcap_regulator vreg_table[] = { 109 VREG_INFO(V1, PCAP_REG_VREG1, 1, 2, 18, 0), 110 VREG_INFO(V2, PCAP_REG_VREG1, 5, 6, 19, 22), 111 VREG_INFO(V3, PCAP_REG_VREG1, 7, 8, 20, 23), 112 VREG_INFO(V4, PCAP_REG_VREG1, 11, 12, 21, 24), 113 /* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */ 114 VREG_INFO(V5, PCAP_REG_VREG1, 15, 16, 12, 19), 115 116 VREG_INFO(V6, PCAP_REG_VREG2, 1, 2, 14, 20), 117 VREG_INFO(V7, PCAP_REG_VREG2, 3, 4, 15, 21), 118 VREG_INFO(V8, PCAP_REG_VREG2, 5, 6, 16, 22), 119 VREG_INFO(V9, PCAP_REG_VREG2, 9, 10, 17, 23), 120 VREG_INFO(V10, PCAP_REG_VREG2, 10, NA, 18, 24), 121 122 VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1, 2, 22, 23), 123 /* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */ 124 VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4, 5, 0, 1), 125 VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7, 8, 2, 3), 126 VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4, 5), 127 VREG_INFO(VSIM, PCAP_REG_AUXVREG, 17, 18, NA, 6), 128 VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7), 129 VREG_INFO(VVIB, PCAP_REG_AUXVREG, 19, 20, NA, NA), 130 131 VREG_INFO(SW1, PCAP_REG_SWCTRL, 1, 2, NA, NA), 132 VREG_INFO(SW2, PCAP_REG_SWCTRL, 6, 7, NA, NA), 133 /* SW3 STBY is on PCAP_REG_AUXVREG */ 134 VREG_INFO(SW3, PCAP_REG_SWCTRL, 11, 12, 24, NA), 135 136 /* SWxS used to control SWx voltage on standby */ 137 /* VREG_INFO(SW1S, PCAP_REG_LOWPWR, NA, 12, NA, NA), 138 VREG_INFO(SW2S, PCAP_REG_LOWPWR, NA, 20, NA, NA), */ 139 }; 140 141 static int pcap_regulator_set_voltage_sel(struct regulator_dev *rdev, 142 unsigned selector) 143 { 144 const struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 145 void *pcap = rdev_get_drvdata(rdev); 146 147 /* the regulator doesn't support voltage switching */ 148 if (rdev->desc->n_voltages == 1) 149 return -EINVAL; 150 151 return ezx_pcap_set_bits(pcap, vreg->reg, 152 (rdev->desc->n_voltages - 1) << vreg->index, 153 selector << vreg->index); 154 } 155 156 static int pcap_regulator_get_voltage_sel(struct regulator_dev *rdev) 157 { 158 const struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 159 void *pcap = rdev_get_drvdata(rdev); 160 u32 tmp; 161 162 if (rdev->desc->n_voltages == 1) 163 return 0; 164 165 ezx_pcap_read(pcap, vreg->reg, &tmp); 166 tmp = ((tmp >> vreg->index) & (rdev->desc->n_voltages - 1)); 167 return tmp; 168 } 169 170 static int pcap_regulator_enable(struct regulator_dev *rdev) 171 { 172 const struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 173 void *pcap = rdev_get_drvdata(rdev); 174 175 if (vreg->en == NA) 176 return -EINVAL; 177 178 return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en); 179 } 180 181 static int pcap_regulator_disable(struct regulator_dev *rdev) 182 { 183 const struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 184 void *pcap = rdev_get_drvdata(rdev); 185 186 if (vreg->en == NA) 187 return -EINVAL; 188 189 return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0); 190 } 191 192 static int pcap_regulator_is_enabled(struct regulator_dev *rdev) 193 { 194 const struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 195 void *pcap = rdev_get_drvdata(rdev); 196 u32 tmp; 197 198 if (vreg->en == NA) 199 return -EINVAL; 200 201 ezx_pcap_read(pcap, vreg->reg, &tmp); 202 return (tmp >> vreg->en) & 1; 203 } 204 205 static const struct regulator_ops pcap_regulator_ops = { 206 .list_voltage = regulator_list_voltage_table, 207 .set_voltage_sel = pcap_regulator_set_voltage_sel, 208 .get_voltage_sel = pcap_regulator_get_voltage_sel, 209 .enable = pcap_regulator_enable, 210 .disable = pcap_regulator_disable, 211 .is_enabled = pcap_regulator_is_enabled, 212 }; 213 214 #define VREG(_vreg) \ 215 [_vreg] = { \ 216 .name = #_vreg, \ 217 .id = _vreg, \ 218 .n_voltages = ARRAY_SIZE(_vreg##_table), \ 219 .volt_table = _vreg##_table, \ 220 .ops = &pcap_regulator_ops, \ 221 .type = REGULATOR_VOLTAGE, \ 222 .owner = THIS_MODULE, \ 223 } 224 225 static const struct regulator_desc pcap_regulators[] = { 226 VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7), 227 VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3), 228 VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2), 229 }; 230 231 static int pcap_regulator_probe(struct platform_device *pdev) 232 { 233 struct regulator_dev *rdev; 234 void *pcap = dev_get_drvdata(pdev->dev.parent); 235 struct regulator_config config = { }; 236 237 config.dev = &pdev->dev; 238 config.init_data = dev_get_platdata(&pdev->dev); 239 config.driver_data = pcap; 240 241 rdev = devm_regulator_register(&pdev->dev, &pcap_regulators[pdev->id], 242 &config); 243 if (IS_ERR(rdev)) 244 return PTR_ERR(rdev); 245 246 platform_set_drvdata(pdev, rdev); 247 248 return 0; 249 } 250 251 static struct platform_driver pcap_regulator_driver = { 252 .driver = { 253 .name = "pcap-regulator", 254 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 255 }, 256 .probe = pcap_regulator_probe, 257 }; 258 259 static int __init pcap_regulator_init(void) 260 { 261 return platform_driver_register(&pcap_regulator_driver); 262 } 263 264 static void __exit pcap_regulator_exit(void) 265 { 266 platform_driver_unregister(&pcap_regulator_driver); 267 } 268 269 subsys_initcall(pcap_regulator_init); 270 module_exit(pcap_regulator_exit); 271 272 MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>"); 273 MODULE_DESCRIPTION("PCAP2 Regulator Driver"); 274 MODULE_LICENSE("GPL"); 275