1 /* 2 * wm8994-irq.c -- Interrupt controller support for Wolfson WM8994 3 * 4 * Copyright 2010 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.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/i2c.h> 18 #include <linux/irq.h> 19 #include <linux/mfd/core.h> 20 #include <linux/interrupt.h> 21 #include <linux/regmap.h> 22 23 #include <linux/mfd/wm8994/core.h> 24 #include <linux/mfd/wm8994/pdata.h> 25 #include <linux/mfd/wm8994/registers.h> 26 27 #include <linux/delay.h> 28 29 static struct regmap_irq wm8994_irqs[] = { 30 [WM8994_IRQ_TEMP_SHUT] = { 31 .reg_offset = 1, 32 .mask = WM8994_TEMP_SHUT_EINT, 33 }, 34 [WM8994_IRQ_MIC1_DET] = { 35 .reg_offset = 1, 36 .mask = WM8994_MIC1_DET_EINT, 37 }, 38 [WM8994_IRQ_MIC1_SHRT] = { 39 .reg_offset = 1, 40 .mask = WM8994_MIC1_SHRT_EINT, 41 }, 42 [WM8994_IRQ_MIC2_DET] = { 43 .reg_offset = 1, 44 .mask = WM8994_MIC2_DET_EINT, 45 }, 46 [WM8994_IRQ_MIC2_SHRT] = { 47 .reg_offset = 1, 48 .mask = WM8994_MIC2_SHRT_EINT, 49 }, 50 [WM8994_IRQ_FLL1_LOCK] = { 51 .reg_offset = 1, 52 .mask = WM8994_FLL1_LOCK_EINT, 53 }, 54 [WM8994_IRQ_FLL2_LOCK] = { 55 .reg_offset = 1, 56 .mask = WM8994_FLL2_LOCK_EINT, 57 }, 58 [WM8994_IRQ_SRC1_LOCK] = { 59 .reg_offset = 1, 60 .mask = WM8994_SRC1_LOCK_EINT, 61 }, 62 [WM8994_IRQ_SRC2_LOCK] = { 63 .reg_offset = 1, 64 .mask = WM8994_SRC2_LOCK_EINT, 65 }, 66 [WM8994_IRQ_AIF1DRC1_SIG_DET] = { 67 .reg_offset = 1, 68 .mask = WM8994_AIF1DRC1_SIG_DET, 69 }, 70 [WM8994_IRQ_AIF1DRC2_SIG_DET] = { 71 .reg_offset = 1, 72 .mask = WM8994_AIF1DRC2_SIG_DET_EINT, 73 }, 74 [WM8994_IRQ_AIF2DRC_SIG_DET] = { 75 .reg_offset = 1, 76 .mask = WM8994_AIF2DRC_SIG_DET_EINT, 77 }, 78 [WM8994_IRQ_FIFOS_ERR] = { 79 .reg_offset = 1, 80 .mask = WM8994_FIFOS_ERR_EINT, 81 }, 82 [WM8994_IRQ_WSEQ_DONE] = { 83 .reg_offset = 1, 84 .mask = WM8994_WSEQ_DONE_EINT, 85 }, 86 [WM8994_IRQ_DCS_DONE] = { 87 .reg_offset = 1, 88 .mask = WM8994_DCS_DONE_EINT, 89 }, 90 [WM8994_IRQ_TEMP_WARN] = { 91 .reg_offset = 1, 92 .mask = WM8994_TEMP_WARN_EINT, 93 }, 94 [WM8994_IRQ_GPIO(1)] = { 95 .mask = WM8994_GP1_EINT, 96 }, 97 [WM8994_IRQ_GPIO(2)] = { 98 .mask = WM8994_GP2_EINT, 99 }, 100 [WM8994_IRQ_GPIO(3)] = { 101 .mask = WM8994_GP3_EINT, 102 }, 103 [WM8994_IRQ_GPIO(4)] = { 104 .mask = WM8994_GP4_EINT, 105 }, 106 [WM8994_IRQ_GPIO(5)] = { 107 .mask = WM8994_GP5_EINT, 108 }, 109 [WM8994_IRQ_GPIO(6)] = { 110 .mask = WM8994_GP6_EINT, 111 }, 112 [WM8994_IRQ_GPIO(7)] = { 113 .mask = WM8994_GP7_EINT, 114 }, 115 [WM8994_IRQ_GPIO(8)] = { 116 .mask = WM8994_GP8_EINT, 117 }, 118 [WM8994_IRQ_GPIO(9)] = { 119 .mask = WM8994_GP8_EINT, 120 }, 121 [WM8994_IRQ_GPIO(10)] = { 122 .mask = WM8994_GP10_EINT, 123 }, 124 [WM8994_IRQ_GPIO(11)] = { 125 .mask = WM8994_GP11_EINT, 126 }, 127 }; 128 129 static struct regmap_irq_chip wm8994_irq_chip = { 130 .name = "wm8994", 131 .irqs = wm8994_irqs, 132 .num_irqs = ARRAY_SIZE(wm8994_irqs), 133 134 .num_regs = 2, 135 .status_base = WM8994_INTERRUPT_STATUS_1, 136 .mask_base = WM8994_INTERRUPT_STATUS_1_MASK, 137 .ack_base = WM8994_INTERRUPT_STATUS_1, 138 .runtime_pm = true, 139 }; 140 141 int wm8994_irq_init(struct wm8994 *wm8994) 142 { 143 int ret; 144 unsigned long irqflags; 145 struct wm8994_pdata *pdata = wm8994->dev->platform_data; 146 147 if (!wm8994->irq) { 148 dev_warn(wm8994->dev, 149 "No interrupt specified, no interrupts\n"); 150 wm8994->irq_base = 0; 151 return 0; 152 } 153 154 /* select user or default irq flags */ 155 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT; 156 if (pdata->irq_flags) 157 irqflags = pdata->irq_flags; 158 159 ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq, 160 irqflags, 161 wm8994->irq_base, &wm8994_irq_chip, 162 &wm8994->irq_data); 163 if (ret != 0) { 164 dev_err(wm8994->dev, "Failed to register IRQ chip: %d\n", ret); 165 return ret; 166 } 167 168 /* Enable top level interrupt if it was masked */ 169 wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0); 170 171 return 0; 172 } 173 174 void wm8994_irq_exit(struct wm8994 *wm8994) 175 { 176 regmap_del_irq_chip(wm8994->irq, wm8994->irq_data); 177 } 178