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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * wm8994-irq.c -- Interrupt controller support for Wolfson WM89944 *5 * Copyright 2010 Wolfson Microelectronics PLC.6 *7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>8 */9 10#include <linux/kernel.h>11#include <linux/module.h>12#include <linux/gpio.h>13#include <linux/i2c.h>14#include <linux/irq.h>15#include <linux/mfd/core.h>16#include <linux/interrupt.h>17#include <linux/irqdomain.h>18#include <linux/regmap.h>19 20#include <linux/mfd/wm8994/core.h>21#include <linux/mfd/wm8994/pdata.h>22#include <linux/mfd/wm8994/registers.h>23 24#include <linux/delay.h>25 26static const struct regmap_irq wm8994_irqs[] = {27 [WM8994_IRQ_TEMP_SHUT] = {28 .reg_offset = 1,29 .mask = WM8994_TEMP_SHUT_EINT,30 },31 [WM8994_IRQ_MIC1_DET] = {32 .reg_offset = 1,33 .mask = WM8994_MIC1_DET_EINT,34 },35 [WM8994_IRQ_MIC1_SHRT] = {36 .reg_offset = 1,37 .mask = WM8994_MIC1_SHRT_EINT,38 },39 [WM8994_IRQ_MIC2_DET] = {40 .reg_offset = 1,41 .mask = WM8994_MIC2_DET_EINT,42 },43 [WM8994_IRQ_MIC2_SHRT] = {44 .reg_offset = 1,45 .mask = WM8994_MIC2_SHRT_EINT,46 },47 [WM8994_IRQ_FLL1_LOCK] = {48 .reg_offset = 1,49 .mask = WM8994_FLL1_LOCK_EINT,50 },51 [WM8994_IRQ_FLL2_LOCK] = {52 .reg_offset = 1,53 .mask = WM8994_FLL2_LOCK_EINT,54 },55 [WM8994_IRQ_SRC1_LOCK] = {56 .reg_offset = 1,57 .mask = WM8994_SRC1_LOCK_EINT,58 },59 [WM8994_IRQ_SRC2_LOCK] = {60 .reg_offset = 1,61 .mask = WM8994_SRC2_LOCK_EINT,62 },63 [WM8994_IRQ_AIF1DRC1_SIG_DET] = {64 .reg_offset = 1,65 .mask = WM8994_AIF1DRC1_SIG_DET,66 },67 [WM8994_IRQ_AIF1DRC2_SIG_DET] = {68 .reg_offset = 1,69 .mask = WM8994_AIF1DRC2_SIG_DET_EINT,70 },71 [WM8994_IRQ_AIF2DRC_SIG_DET] = {72 .reg_offset = 1,73 .mask = WM8994_AIF2DRC_SIG_DET_EINT,74 },75 [WM8994_IRQ_FIFOS_ERR] = {76 .reg_offset = 1,77 .mask = WM8994_FIFOS_ERR_EINT,78 },79 [WM8994_IRQ_WSEQ_DONE] = {80 .reg_offset = 1,81 .mask = WM8994_WSEQ_DONE_EINT,82 },83 [WM8994_IRQ_DCS_DONE] = {84 .reg_offset = 1,85 .mask = WM8994_DCS_DONE_EINT,86 },87 [WM8994_IRQ_TEMP_WARN] = {88 .reg_offset = 1,89 .mask = WM8994_TEMP_WARN_EINT,90 },91 [WM8994_IRQ_GPIO(1)] = {92 .mask = WM8994_GP1_EINT,93 },94 [WM8994_IRQ_GPIO(2)] = {95 .mask = WM8994_GP2_EINT,96 },97 [WM8994_IRQ_GPIO(3)] = {98 .mask = WM8994_GP3_EINT,99 },100 [WM8994_IRQ_GPIO(4)] = {101 .mask = WM8994_GP4_EINT,102 },103 [WM8994_IRQ_GPIO(5)] = {104 .mask = WM8994_GP5_EINT,105 },106 [WM8994_IRQ_GPIO(6)] = {107 .mask = WM8994_GP6_EINT,108 },109 [WM8994_IRQ_GPIO(7)] = {110 .mask = WM8994_GP7_EINT,111 },112 [WM8994_IRQ_GPIO(8)] = {113 .mask = WM8994_GP8_EINT,114 },115 [WM8994_IRQ_GPIO(9)] = {116 .mask = WM8994_GP8_EINT,117 },118 [WM8994_IRQ_GPIO(10)] = {119 .mask = WM8994_GP10_EINT,120 },121 [WM8994_IRQ_GPIO(11)] = {122 .mask = WM8994_GP11_EINT,123 },124};125 126static const struct regmap_irq_chip wm8994_irq_chip = {127 .name = "wm8994",128 .irqs = wm8994_irqs,129 .num_irqs = ARRAY_SIZE(wm8994_irqs),130 131 .num_regs = 2,132 .status_base = WM8994_INTERRUPT_STATUS_1,133 .mask_base = WM8994_INTERRUPT_STATUS_1_MASK,134 .ack_base = WM8994_INTERRUPT_STATUS_1,135 .runtime_pm = true,136};137 138static void wm8994_edge_irq_enable(struct irq_data *data)139{140}141 142static void wm8994_edge_irq_disable(struct irq_data *data)143{144}145 146static struct irq_chip wm8994_edge_irq_chip = {147 .name = "wm8994_edge",148 .irq_disable = wm8994_edge_irq_disable,149 .irq_enable = wm8994_edge_irq_enable,150};151 152static irqreturn_t wm8994_edge_irq(int irq, void *data)153{154 struct wm8994 *wm8994 = data;155 156 while (gpio_get_value_cansleep(wm8994->pdata.irq_gpio))157 handle_nested_irq(irq_find_mapping(wm8994->edge_irq, 0));158 159 return IRQ_HANDLED;160}161 162static int wm8994_edge_irq_map(struct irq_domain *h, unsigned int virq,163 irq_hw_number_t hw)164{165 struct wm8994 *wm8994 = h->host_data;166 167 irq_set_chip_data(virq, wm8994);168 irq_set_chip_and_handler(virq, &wm8994_edge_irq_chip, handle_edge_irq);169 irq_set_nested_thread(virq, 1);170 irq_set_noprobe(virq);171 172 return 0;173}174 175static const struct irq_domain_ops wm8994_edge_irq_ops = {176 .map = wm8994_edge_irq_map,177 .xlate = irq_domain_xlate_twocell,178};179 180int wm8994_irq_init(struct wm8994 *wm8994)181{182 int ret;183 unsigned long irqflags;184 struct wm8994_pdata *pdata = &wm8994->pdata;185 186 if (!wm8994->irq) {187 dev_warn(wm8994->dev,188 "No interrupt specified, no interrupts\n");189 wm8994->irq_base = 0;190 return 0;191 }192 193 /* select user or default irq flags */194 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;195 if (pdata->irq_flags)196 irqflags = pdata->irq_flags;197 198 /* use a GPIO for edge triggered controllers */199 if (irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {200 if (gpio_to_irq(pdata->irq_gpio) != wm8994->irq) {201 dev_warn(wm8994->dev, "IRQ %d is not GPIO %d (%d)\n",202 wm8994->irq, pdata->irq_gpio,203 gpio_to_irq(pdata->irq_gpio));204 wm8994->irq = gpio_to_irq(pdata->irq_gpio);205 }206 207 ret = devm_gpio_request_one(wm8994->dev, pdata->irq_gpio,208 GPIOF_IN, "WM8994 IRQ");209 210 if (ret != 0) {211 dev_err(wm8994->dev, "Failed to get IRQ GPIO: %d\n",212 ret);213 return ret;214 }215 216 wm8994->edge_irq = irq_domain_add_linear(NULL, 1,217 &wm8994_edge_irq_ops,218 wm8994);219 220 ret = regmap_add_irq_chip(wm8994->regmap,221 irq_create_mapping(wm8994->edge_irq,222 0),223 IRQF_ONESHOT,224 wm8994->irq_base, &wm8994_irq_chip,225 &wm8994->irq_data);226 if (ret != 0) {227 dev_err(wm8994->dev, "Failed to get IRQ: %d\n",228 ret);229 return ret;230 }231 232 ret = request_threaded_irq(wm8994->irq,233 NULL, wm8994_edge_irq,234 irqflags,235 "WM8994 edge", wm8994);236 } else {237 ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,238 irqflags,239 wm8994->irq_base, &wm8994_irq_chip,240 &wm8994->irq_data);241 }242 243 if (ret != 0) {244 dev_err(wm8994->dev, "Failed to register IRQ chip: %d\n", ret);245 return ret;246 }247 248 /* Enable top level interrupt if it was masked */249 wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);250 251 return 0;252}253EXPORT_SYMBOL(wm8994_irq_init);254 255void wm8994_irq_exit(struct wm8994 *wm8994)256{257 regmap_del_irq_chip(wm8994->irq, wm8994->irq_data);258}259EXPORT_SYMBOL(wm8994_irq_exit);260