drivers/mfd/da9052-irq.c

   1 /*
   2  * DA9052 interrupt support
   3  *
   4  * Author: Fabio Estevam <fabio.estevam@freescale.com>
   5  * Based on arizona-irq.c, which is:
   6  *
   7  * Copyright 2012 Wolfson Microelectronics plc
   8  *
   9  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/device.h>
  17 #include <linux/delay.h>
  18 #include <linux/input.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/irq.h>
  21 #include <linux/irqdomain.h>
  22 #include <linux/slab.h>
  23 #include <linux/module.h>
  24
  25 #include <linux/mfd/da9052/da9052.h>
  26 #include <linux/mfd/da9052/reg.h>
  27
  28 #define DA9052_NUM_IRQ_REGS             4
  29 #define DA9052_IRQ_MASK_POS_1           0x01
  30 #define DA9052_IRQ_MASK_POS_2           0x02
  31 #define DA9052_IRQ_MASK_POS_3           0x04
  32 #define DA9052_IRQ_MASK_POS_4           0x08
  33 #define DA9052_IRQ_MASK_POS_5           0x10
  34 #define DA9052_IRQ_MASK_POS_6           0x20
  35 #define DA9052_IRQ_MASK_POS_7           0x40
  36 #define DA9052_IRQ_MASK_POS_8           0x80
  37
  38 static const struct regmap_irq da9052_irqs[] = {
  39         [DA9052_IRQ_DCIN] = {
  40                 .reg_offset = 0,
  41                 .mask = DA9052_IRQ_MASK_POS_1,
  42         },
  43         [DA9052_IRQ_VBUS] = {
  44                 .reg_offset = 0,
  45                 .mask = DA9052_IRQ_MASK_POS_2,
  46         },
  47         [DA9052_IRQ_DCINREM] = {
  48                 .reg_offset = 0,
  49                 .mask = DA9052_IRQ_MASK_POS_3,
  50         },
  51         [DA9052_IRQ_VBUSREM] = {
  52                 .reg_offset = 0,
  53                 .mask = DA9052_IRQ_MASK_POS_4,
  54         },
  55         [DA9052_IRQ_VDDLOW] = {
  56                 .reg_offset = 0,
  57                 .mask = DA9052_IRQ_MASK_POS_5,
  58         },
  59         [DA9052_IRQ_ALARM] = {
  60                 .reg_offset = 0,
  61                 .mask = DA9052_IRQ_MASK_POS_6,
  62         },
  63         [DA9052_IRQ_SEQRDY] = {
  64                 .reg_offset = 0,
  65                 .mask = DA9052_IRQ_MASK_POS_7,
  66         },
  67         [DA9052_IRQ_COMP1V2] = {
  68                 .reg_offset = 0,
  69                 .mask = DA9052_IRQ_MASK_POS_8,
  70         },
  71         [DA9052_IRQ_NONKEY] = {
  72                 .reg_offset = 1,
  73                 .mask = DA9052_IRQ_MASK_POS_1,
  74         },
  75         [DA9052_IRQ_IDFLOAT] = {
  76                 .reg_offset = 1,
  77                 .mask = DA9052_IRQ_MASK_POS_2,
  78         },
  79         [DA9052_IRQ_IDGND] = {
  80                 .reg_offset = 1,
  81                 .mask = DA9052_IRQ_MASK_POS_3,
  82         },
  83         [DA9052_IRQ_CHGEND] = {
  84                 .reg_offset = 1,
  85                 .mask = DA9052_IRQ_MASK_POS_4,
  86         },
  87         [DA9052_IRQ_TBAT] = {
  88                 .reg_offset = 1,
  89                 .mask = DA9052_IRQ_MASK_POS_5,
  90         },
  91         [DA9052_IRQ_ADC_EOM] = {
  92                 .reg_offset = 1,
  93                 .mask = DA9052_IRQ_MASK_POS_6,
  94         },
  95         [DA9052_IRQ_PENDOWN] = {
  96                 .reg_offset = 1,
  97                 .mask = DA9052_IRQ_MASK_POS_7,
  98         },
  99         [DA9052_IRQ_TSIREADY] = {
 100                 .reg_offset = 1,
 101                 .mask = DA9052_IRQ_MASK_POS_8,
 102         },
 103         [DA9052_IRQ_GPI0] = {
 104                 .reg_offset = 2,
 105                 .mask = DA9052_IRQ_MASK_POS_1,
 106         },
 107         [DA9052_IRQ_GPI1] = {
 108                 .reg_offset = 2,
 109                 .mask = DA9052_IRQ_MASK_POS_2,
 110         },
 111         [DA9052_IRQ_GPI2] = {
 112                 .reg_offset = 2,
 113                 .mask = DA9052_IRQ_MASK_POS_3,
 114         },
 115         [DA9052_IRQ_GPI3] = {
 116                 .reg_offset = 2,
 117                 .mask = DA9052_IRQ_MASK_POS_4,
 118         },
 119         [DA9052_IRQ_GPI4] = {
 120                 .reg_offset = 2,
 121                 .mask = DA9052_IRQ_MASK_POS_5,
 122         },
 123         [DA9052_IRQ_GPI5] = {
 124                 .reg_offset = 2,
 125                 .mask = DA9052_IRQ_MASK_POS_6,
 126         },
 127         [DA9052_IRQ_GPI6] = {
 128                 .reg_offset = 2,
 129                 .mask = DA9052_IRQ_MASK_POS_7,
 130         },
 131         [DA9052_IRQ_GPI7] = {
 132                 .reg_offset = 2,
 133                 .mask = DA9052_IRQ_MASK_POS_8,
 134         },
 135         [DA9052_IRQ_GPI8] = {
 136                 .reg_offset = 3,
 137                 .mask = DA9052_IRQ_MASK_POS_1,
 138         },
 139         [DA9052_IRQ_GPI9] = {
 140                 .reg_offset = 3,
 141                 .mask = DA9052_IRQ_MASK_POS_2,
 142         },
 143         [DA9052_IRQ_GPI10] = {
 144                 .reg_offset = 3,
 145                 .mask = DA9052_IRQ_MASK_POS_3,
 146         },
 147         [DA9052_IRQ_GPI11] = {
 148                 .reg_offset = 3,
 149                 .mask = DA9052_IRQ_MASK_POS_4,
 150         },
 151         [DA9052_IRQ_GPI12] = {
 152                 .reg_offset = 3,
 153                 .mask = DA9052_IRQ_MASK_POS_5,
 154         },
 155         [DA9052_IRQ_GPI13] = {
 156                 .reg_offset = 3,
 157                 .mask = DA9052_IRQ_MASK_POS_6,
 158         },
 159         [DA9052_IRQ_GPI14] = {
 160                 .reg_offset = 3,
 161                 .mask = DA9052_IRQ_MASK_POS_7,
 162         },
 163         [DA9052_IRQ_GPI15] = {
 164                 .reg_offset = 3,
 165                 .mask = DA9052_IRQ_MASK_POS_8,
 166         },
 167 };
 168
 169 static const struct regmap_irq_chip da9052_regmap_irq_chip = {
 170         .name = "da9052_irq",
 171         .status_base = DA9052_EVENT_A_REG,
 172         .mask_base = DA9052_IRQ_MASK_A_REG,
 173         .ack_base = DA9052_EVENT_A_REG,
 174         .num_regs = DA9052_NUM_IRQ_REGS,
 175         .irqs = da9052_irqs,
 176         .num_irqs = ARRAY_SIZE(da9052_irqs),
 177 };
 178
 179 static int da9052_map_irq(struct da9052 *da9052, int irq)
 180 {
 181         return regmap_irq_get_virq(da9052->irq_data, irq);
 182 }
 183
 184 int da9052_enable_irq(struct da9052 *da9052, int irq)
 185 {
 186         irq = da9052_map_irq(da9052, irq);
 187         if (irq < 0)
 188                 return irq;
 189
 190         enable_irq(irq);
 191
 192         return 0;
 193 }
 194 EXPORT_SYMBOL_GPL(da9052_enable_irq);
 195
 196 int da9052_disable_irq(struct da9052 *da9052, int irq)
 197 {
 198         irq = da9052_map_irq(da9052, irq);
 199         if (irq < 0)
 200                 return irq;
 201
 202         disable_irq(irq);
 203
 204         return 0;
 205 }
 206 EXPORT_SYMBOL_GPL(da9052_disable_irq);
 207
 208 int da9052_disable_irq_nosync(struct da9052 *da9052, int irq)
 209 {
 210         irq = da9052_map_irq(da9052, irq);
 211         if (irq < 0)
 212                 return irq;
 213
 214         disable_irq_nosync(irq);
 215
 216         return 0;
 217 }
 218 EXPORT_SYMBOL_GPL(da9052_disable_irq_nosync);
 219
 220 int da9052_request_irq(struct da9052 *da9052, int irq, char *name,
 221                            irq_handler_t handler, void *data)
 222 {
 223         irq = da9052_map_irq(da9052, irq);
 224         if (irq < 0)
 225                 return irq;
 226
 227         return request_threaded_irq(irq, NULL, handler,
 228                                      IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 229                                      name, data);
 230 }
 231 EXPORT_SYMBOL_GPL(da9052_request_irq);
 232
 233 void da9052_free_irq(struct da9052 *da9052, int irq, void *data)
 234 {
 235         irq = da9052_map_irq(da9052, irq);
 236         if (irq < 0)
 237                 return;
 238
 239         free_irq(irq, data);
 240 }
 241 EXPORT_SYMBOL_GPL(da9052_free_irq);
 242
 243 static irqreturn_t da9052_auxadc_irq(int irq, void *irq_data)
 244 {
 245         struct da9052 *da9052 = irq_data;
 246
 247         complete(&da9052->done);
 248
 249         return IRQ_HANDLED;
 250 }
 251
 252 int da9052_irq_init(struct da9052 *da9052)
 253 {
 254         int ret;
 255
 256         ret = regmap_add_irq_chip(da9052->regmap, da9052->chip_irq,
 257                                   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 258                                   -1, &da9052_regmap_irq_chip,
 259                                   &da9052->irq_data);
 260         if (ret < 0) {
 261                 dev_err(da9052->dev, "regmap_add_irq_chip failed: %d\n", ret);
 262                 goto regmap_err;
 263         }
 264
 265         enable_irq_wake(da9052->chip_irq);
 266
 267         ret = da9052_request_irq(da9052, DA9052_IRQ_ADC_EOM, "adc-irq",
 268                             da9052_auxadc_irq, da9052);
 269
 270         if (ret != 0) {
 271                 dev_err(da9052->dev, "DA9052_IRQ_ADC_EOM failed: %d\n", ret);
 272                 goto request_irq_err;
 273         }
 274
 275         return 0;
 276
 277 request_irq_err:
 278         regmap_del_irq_chip(da9052->chip_irq, da9052->irq_data);
 279 regmap_err:
 280         return ret;
 281
 282 }
 283
 284 int da9052_irq_exit(struct da9052 *da9052)
 285 {
 286         da9052_free_irq(da9052, DA9052_IRQ_ADC_EOM, da9052);
 287         regmap_del_irq_chip(da9052->chip_irq, da9052->irq_data);
 288
 289         return 0;
 290 }