drivers/mfd/da9063-irq.c

   1 /* da9063-irq.c: Interrupts support for Dialog DA9063
   2  *
   3  * Copyright 2012 Dialog Semiconductor Ltd.
   4  * Copyright 2013 Philipp Zabel, Pengutronix
   5  *
   6  * Author: Michal Hajduk <michal.hajduk@diasemi.com>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/irq.h>
  18 #include <linux/mfd/core.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/regmap.h>
  21 #include <linux/mfd/da9063/core.h>
  22 #include <linux/mfd/da9063/pdata.h>
  23
  24 #define DA9063_REG_EVENT_A_OFFSET       0
  25 #define DA9063_REG_EVENT_B_OFFSET       1
  26 #define DA9063_REG_EVENT_C_OFFSET       2
  27 #define DA9063_REG_EVENT_D_OFFSET       3
  28 #define EVENTS_BUF_LEN                  4
  29
  30 static const u8 mask_events_buf[] = { [0 ... (EVENTS_BUF_LEN - 1)] = ~0 };
  31
  32 struct da9063_irq_data {
  33         u16 reg;
  34         u8 mask;
  35 };
  36
  37 static struct regmap_irq da9063_irqs[] = {
  38         /* DA9063 event A register */
  39         [DA9063_IRQ_ONKEY] = {
  40                 .reg_offset = DA9063_REG_EVENT_A_OFFSET,
  41                 .mask = DA9063_M_ONKEY,
  42         },
  43         [DA9063_IRQ_ALARM] = {
  44                 .reg_offset = DA9063_REG_EVENT_A_OFFSET,
  45                 .mask = DA9063_M_ALARM,
  46         },
  47         [DA9063_IRQ_TICK] = {
  48                 .reg_offset = DA9063_REG_EVENT_A_OFFSET,
  49                 .mask = DA9063_M_TICK,
  50         },
  51         [DA9063_IRQ_ADC_RDY] = {
  52                 .reg_offset = DA9063_REG_EVENT_A_OFFSET,
  53                 .mask = DA9063_M_ADC_RDY,
  54         },
  55         [DA9063_IRQ_SEQ_RDY] = {
  56                 .reg_offset = DA9063_REG_EVENT_A_OFFSET,
  57                 .mask = DA9063_M_SEQ_RDY,
  58         },
  59         /* DA9063 event B register */
  60         [DA9063_IRQ_WAKE] = {
  61                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  62                 .mask = DA9063_M_WAKE,
  63         },
  64         [DA9063_IRQ_TEMP] = {
  65                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  66                 .mask = DA9063_M_TEMP,
  67         },
  68         [DA9063_IRQ_COMP_1V2] = {
  69                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  70                 .mask = DA9063_M_COMP_1V2,
  71         },
  72         [DA9063_IRQ_LDO_LIM] = {
  73                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  74                 .mask = DA9063_M_LDO_LIM,
  75         },
  76         [DA9063_IRQ_REG_UVOV] = {
  77                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  78                 .mask = DA9063_M_UVOV,
  79         },
  80         [DA9063_IRQ_VDD_MON] = {
  81                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  82                 .mask = DA9063_M_VDD_MON,
  83         },
  84         [DA9063_IRQ_WARN] = {
  85                 .reg_offset = DA9063_REG_EVENT_B_OFFSET,
  86                 .mask = DA9063_M_VDD_WARN,
  87         },
  88         /* DA9063 event C register */
  89         [DA9063_IRQ_GPI0] = {
  90                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
  91                 .mask = DA9063_M_GPI0,
  92         },
  93         [DA9063_IRQ_GPI1] = {
  94                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
  95                 .mask = DA9063_M_GPI1,
  96         },
  97         [DA9063_IRQ_GPI2] = {
  98                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
  99                 .mask = DA9063_M_GPI2,
 100         },
 101         [DA9063_IRQ_GPI3] = {
 102                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
 103                 .mask = DA9063_M_GPI3,
 104         },
 105         [DA9063_IRQ_GPI4] = {
 106                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
 107                 .mask = DA9063_M_GPI4,
 108         },
 109         [DA9063_IRQ_GPI5] = {
 110                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
 111                 .mask = DA9063_M_GPI5,
 112         },
 113         [DA9063_IRQ_GPI6] = {
 114                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
 115                 .mask = DA9063_M_GPI6,
 116         },
 117         [DA9063_IRQ_GPI7] = {
 118                 .reg_offset = DA9063_REG_EVENT_C_OFFSET,
 119                 .mask = DA9063_M_GPI7,
 120         },
 121         /* DA9063 event D register */
 122         [DA9063_IRQ_GPI8] = {
 123                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 124                 .mask = DA9063_M_GPI8,
 125         },
 126         [DA9063_IRQ_GPI9] = {
 127                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 128                 .mask = DA9063_M_GPI9,
 129         },
 130         [DA9063_IRQ_GPI10] = {
 131                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 132                 .mask = DA9063_M_GPI10,
 133         },
 134         [DA9063_IRQ_GPI11] = {
 135                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 136                 .mask = DA9063_M_GPI11,
 137         },
 138         [DA9063_IRQ_GPI12] = {
 139                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 140                 .mask = DA9063_M_GPI12,
 141         },
 142         [DA9063_IRQ_GPI13] = {
 143                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 144                 .mask = DA9063_M_GPI13,
 145         },
 146         [DA9063_IRQ_GPI14] = {
 147                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 148                 .mask = DA9063_M_GPI14,
 149         },
 150         [DA9063_IRQ_GPI15] = {
 151                 .reg_offset = DA9063_REG_EVENT_D_OFFSET,
 152                 .mask = DA9063_M_GPI15,
 153         },
 154 };
 155
 156 static struct regmap_irq_chip da9063_irq_chip = {
 157         .name = "da9063-irq",
 158         .irqs = da9063_irqs,
 159         .num_irqs = DA9063_NUM_IRQ,
 160
 161         .num_regs = 4,
 162         .status_base = DA9063_REG_EVENT_A,
 163         .mask_base = DA9063_REG_IRQ_MASK_A,
 164         .ack_base = DA9063_REG_EVENT_A,
 165         .init_ack_masked = true,
 166 };
 167
 168 int da9063_irq_init(struct da9063 *da9063)
 169 {
 170         int ret;
 171
 172         if (!da9063->chip_irq) {
 173                 dev_err(da9063->dev, "No IRQ configured\n");
 174                 return -EINVAL;
 175         }
 176
 177         ret = regmap_add_irq_chip(da9063->regmap, da9063->chip_irq,
 178                         IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
 179                         da9063->irq_base, &da9063_irq_chip,
 180                         &da9063->regmap_irq);
 181         if (ret) {
 182                 dev_err(da9063->dev, "Failed to reguest IRQ %d: %d\n",
 183                                 da9063->chip_irq, ret);
 184                 return ret;
 185         }
 186
 187         return 0;
 188 }
 189
 190 void da9063_irq_exit(struct da9063 *da9063)
 191 {
 192         regmap_del_irq_chip(da9063->chip_irq, da9063->regmap_irq);
 193 }