1 /* 2 * PCAP2 Regulator Driver 3 * 4 * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/init.h> 15 #include <linux/err.h> 16 #include <linux/platform_device.h> 17 #include <linux/regulator/driver.h> 18 #include <linux/regulator/machine.h> 19 #include <linux/mfd/ezx-pcap.h> 20 21 static const unsigned int V1_table[] = { 22 2775000, 1275000, 1600000, 1725000, 1825000, 1925000, 2075000, 2275000, 23 }; 24 25 static const unsigned int V2_table[] = { 26 2500000, 2775000, 27 }; 28 29 static const unsigned int V3_table[] = { 30 1075000, 1275000, 1550000, 1725000, 1876000, 1950000, 2075000, 2275000, 31 }; 32 33 static const unsigned int V4_table[] = { 34 1275000, 1550000, 1725000, 1875000, 1950000, 2075000, 2275000, 2775000, 35 }; 36 37 static const unsigned int V5_table[] = { 38 1875000, 2275000, 2475000, 2775000, 39 }; 40 41 static const unsigned int V6_table[] = { 42 2475000, 2775000, 43 }; 44 45 static const unsigned int V7_table[] = { 46 1875000, 2775000, 47 }; 48 49 #define V8_table V4_table 50 51 static const unsigned int V9_table[] = { 52 1575000, 1875000, 2475000, 2775000, 53 }; 54 55 static const unsigned int V10_table[] = { 56 5000000, 57 }; 58 59 static const unsigned int VAUX1_table[] = { 60 1875000, 2475000, 2775000, 3000000, 61 }; 62 63 #define VAUX2_table VAUX1_table 64 65 static const unsigned int VAUX3_table[] = { 66 1200000, 1200000, 1200000, 1200000, 1400000, 1600000, 1800000, 2000000, 67 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 68 }; 69 70 static const unsigned int VAUX4_table[] = { 71 1800000, 1800000, 3000000, 5000000, 72 }; 73 74 static const unsigned int VSIM_table[] = { 75 1875000, 3000000, 76 }; 77 78 static const unsigned int VSIM2_table[] = { 79 1875000, 80 }; 81 82 static const unsigned int VVIB_table[] = { 83 1300000, 1800000, 2000000, 3000000, 84 }; 85 86 static const unsigned int SW1_table[] = { 87 900000, 950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 88 1300000, 1350000, 1400000, 1450000, 1500000, 1600000, 1875000, 2250000, 89 }; 90 91 #define SW2_table SW1_table 92 93 static const unsigned int SW3_table[] = { 94 4000000, 4500000, 5000000, 5500000, 95 }; 96 97 struct pcap_regulator { 98 const u8 reg; 99 const u8 en; 100 const u8 index; 101 const u8 stby; 102 const u8 lowpwr; 103 }; 104 105 #define NA 0xff 106 107 #define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr) \ 108 [_vreg] = { \ 109 .reg = _reg, \ 110 .en = _en, \ 111 .index = _index, \ 112 .stby = _stby, \ 113 .lowpwr = _lowpwr, \ 114 } 115 116 static struct pcap_regulator vreg_table[] = { 117 VREG_INFO(V1, PCAP_REG_VREG1, 1, 2, 18, 0), 118 VREG_INFO(V2, PCAP_REG_VREG1, 5, 6, 19, 22), 119 VREG_INFO(V3, PCAP_REG_VREG1, 7, 8, 20, 23), 120 VREG_INFO(V4, PCAP_REG_VREG1, 11, 12, 21, 24), 121 /* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */ 122 VREG_INFO(V5, PCAP_REG_VREG1, 15, 16, 12, 19), 123 124 VREG_INFO(V6, PCAP_REG_VREG2, 1, 2, 14, 20), 125 VREG_INFO(V7, PCAP_REG_VREG2, 3, 4, 15, 21), 126 VREG_INFO(V8, PCAP_REG_VREG2, 5, 6, 16, 22), 127 VREG_INFO(V9, PCAP_REG_VREG2, 9, 10, 17, 23), 128 VREG_INFO(V10, PCAP_REG_VREG2, 10, NA, 18, 24), 129 130 VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1, 2, 22, 23), 131 /* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */ 132 VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4, 5, 0, 1), 133 VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7, 8, 2, 3), 134 VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4, 5), 135 VREG_INFO(VSIM, PCAP_REG_AUXVREG, 17, 18, NA, 6), 136 VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7), 137 VREG_INFO(VVIB, PCAP_REG_AUXVREG, 19, 20, NA, NA), 138 139 VREG_INFO(SW1, PCAP_REG_SWCTRL, 1, 2, NA, NA), 140 VREG_INFO(SW2, PCAP_REG_SWCTRL, 6, 7, NA, NA), 141 /* SW3 STBY is on PCAP_REG_AUXVREG */ 142 VREG_INFO(SW3, PCAP_REG_SWCTRL, 11, 12, 24, NA), 143 144 /* SWxS used to control SWx voltage on standby */ 145 /* VREG_INFO(SW1S, PCAP_REG_LOWPWR, NA, 12, NA, NA), 146 VREG_INFO(SW2S, PCAP_REG_LOWPWR, NA, 20, NA, NA), */ 147 }; 148 149 static int pcap_regulator_set_voltage_sel(struct regulator_dev *rdev, 150 unsigned selector) 151 { 152 struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 153 void *pcap = rdev_get_drvdata(rdev); 154 155 /* the regulator doesn't support voltage switching */ 156 if (rdev->desc->n_voltages == 1) 157 return -EINVAL; 158 159 return ezx_pcap_set_bits(pcap, vreg->reg, 160 (rdev->desc->n_voltages - 1) << vreg->index, 161 selector << vreg->index); 162 } 163 164 static int pcap_regulator_get_voltage_sel(struct regulator_dev *rdev) 165 { 166 struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 167 void *pcap = rdev_get_drvdata(rdev); 168 u32 tmp; 169 170 if (rdev->desc->n_voltages == 1) 171 return 0; 172 173 ezx_pcap_read(pcap, vreg->reg, &tmp); 174 tmp = ((tmp >> vreg->index) & (rdev->desc->n_voltages - 1)); 175 return tmp; 176 } 177 178 static int pcap_regulator_enable(struct regulator_dev *rdev) 179 { 180 struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 181 void *pcap = rdev_get_drvdata(rdev); 182 183 if (vreg->en == NA) 184 return -EINVAL; 185 186 return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en); 187 } 188 189 static int pcap_regulator_disable(struct regulator_dev *rdev) 190 { 191 struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 192 void *pcap = rdev_get_drvdata(rdev); 193 194 if (vreg->en == NA) 195 return -EINVAL; 196 197 return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0); 198 } 199 200 static int pcap_regulator_is_enabled(struct regulator_dev *rdev) 201 { 202 struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)]; 203 void *pcap = rdev_get_drvdata(rdev); 204 u32 tmp; 205 206 if (vreg->en == NA) 207 return -EINVAL; 208 209 ezx_pcap_read(pcap, vreg->reg, &tmp); 210 return (tmp >> vreg->en) & 1; 211 } 212 213 static struct regulator_ops pcap_regulator_ops = { 214 .list_voltage = regulator_list_voltage_table, 215 .set_voltage_sel = pcap_regulator_set_voltage_sel, 216 .get_voltage_sel = pcap_regulator_get_voltage_sel, 217 .enable = pcap_regulator_enable, 218 .disable = pcap_regulator_disable, 219 .is_enabled = pcap_regulator_is_enabled, 220 }; 221 222 #define VREG(_vreg) \ 223 [_vreg] = { \ 224 .name = #_vreg, \ 225 .id = _vreg, \ 226 .n_voltages = ARRAY_SIZE(_vreg##_table), \ 227 .volt_table = _vreg##_table, \ 228 .ops = &pcap_regulator_ops, \ 229 .type = REGULATOR_VOLTAGE, \ 230 .owner = THIS_MODULE, \ 231 } 232 233 static const struct regulator_desc pcap_regulators[] = { 234 VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7), 235 VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3), 236 VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2), 237 }; 238 239 static int pcap_regulator_probe(struct platform_device *pdev) 240 { 241 struct regulator_dev *rdev; 242 void *pcap = dev_get_drvdata(pdev->dev.parent); 243 struct regulator_config config = { }; 244 245 config.dev = &pdev->dev; 246 config.init_data = dev_get_platdata(&pdev->dev); 247 config.driver_data = pcap; 248 249 rdev = regulator_register(&pcap_regulators[pdev->id], &config); 250 if (IS_ERR(rdev)) 251 return PTR_ERR(rdev); 252 253 platform_set_drvdata(pdev, rdev); 254 255 return 0; 256 } 257 258 static int pcap_regulator_remove(struct platform_device *pdev) 259 { 260 struct regulator_dev *rdev = platform_get_drvdata(pdev); 261 262 regulator_unregister(rdev); 263 264 return 0; 265 } 266 267 static struct platform_driver pcap_regulator_driver = { 268 .driver = { 269 .name = "pcap-regulator", 270 .owner = THIS_MODULE, 271 }, 272 .probe = pcap_regulator_probe, 273 .remove = pcap_regulator_remove, 274 }; 275 276 static int __init pcap_regulator_init(void) 277 { 278 return platform_driver_register(&pcap_regulator_driver); 279 } 280 281 static void __exit pcap_regulator_exit(void) 282 { 283 platform_driver_unregister(&pcap_regulator_driver); 284 } 285 286 subsys_initcall(pcap_regulator_init); 287 module_exit(pcap_regulator_exit); 288 289 MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>"); 290 MODULE_DESCRIPTION("PCAP2 Regulator Driver"); 291 MODULE_LICENSE("GPL"); 292