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