summaryrefslogtreecommitdiff
path: root/drivers/mfd/wm831x-irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd/wm831x-irq.c')
-rw-r--r--drivers/mfd/wm831x-irq.c665
1 files changed, 665 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c
new file mode 100644
index 000000000..64e512ead
--- /dev/null
+++ b/drivers/mfd/wm831x-irq.c
@@ -0,0 +1,665 @@
+/*
+ * wm831x-irq.c -- Interrupt controller support for Wolfson WM831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/pdata.h>
+#include <linux/mfd/wm831x/gpio.h>
+#include <linux/mfd/wm831x/irq.h>
+
+#include <linux/delay.h>
+
+struct wm831x_irq_data {
+ int primary;
+ int reg;
+ int mask;
+};
+
+static struct wm831x_irq_data wm831x_irqs[] = {
+ [WM831X_IRQ_TEMP_THW] = {
+ .primary = WM831X_TEMP_INT,
+ .reg = 1,
+ .mask = WM831X_TEMP_THW_EINT,
+ },
+ [WM831X_IRQ_GPIO_1] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP1_EINT,
+ },
+ [WM831X_IRQ_GPIO_2] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP2_EINT,
+ },
+ [WM831X_IRQ_GPIO_3] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP3_EINT,
+ },
+ [WM831X_IRQ_GPIO_4] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP4_EINT,
+ },
+ [WM831X_IRQ_GPIO_5] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP5_EINT,
+ },
+ [WM831X_IRQ_GPIO_6] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP6_EINT,
+ },
+ [WM831X_IRQ_GPIO_7] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP7_EINT,
+ },
+ [WM831X_IRQ_GPIO_8] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP8_EINT,
+ },
+ [WM831X_IRQ_GPIO_9] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP9_EINT,
+ },
+ [WM831X_IRQ_GPIO_10] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP10_EINT,
+ },
+ [WM831X_IRQ_GPIO_11] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP11_EINT,
+ },
+ [WM831X_IRQ_GPIO_12] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP12_EINT,
+ },
+ [WM831X_IRQ_GPIO_13] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP13_EINT,
+ },
+ [WM831X_IRQ_GPIO_14] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP14_EINT,
+ },
+ [WM831X_IRQ_GPIO_15] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP15_EINT,
+ },
+ [WM831X_IRQ_GPIO_16] = {
+ .primary = WM831X_GP_INT,
+ .reg = 5,
+ .mask = WM831X_GP16_EINT,
+ },
+ [WM831X_IRQ_ON] = {
+ .primary = WM831X_ON_PIN_INT,
+ .reg = 1,
+ .mask = WM831X_ON_PIN_EINT,
+ },
+ [WM831X_IRQ_PPM_SYSLO] = {
+ .primary = WM831X_PPM_INT,
+ .reg = 1,
+ .mask = WM831X_PPM_SYSLO_EINT,
+ },
+ [WM831X_IRQ_PPM_PWR_SRC] = {
+ .primary = WM831X_PPM_INT,
+ .reg = 1,
+ .mask = WM831X_PPM_PWR_SRC_EINT,
+ },
+ [WM831X_IRQ_PPM_USB_CURR] = {
+ .primary = WM831X_PPM_INT,
+ .reg = 1,
+ .mask = WM831X_PPM_USB_CURR_EINT,
+ },
+ [WM831X_IRQ_WDOG_TO] = {
+ .primary = WM831X_WDOG_INT,
+ .reg = 1,
+ .mask = WM831X_WDOG_TO_EINT,
+ },
+ [WM831X_IRQ_RTC_PER] = {
+ .primary = WM831X_RTC_INT,
+ .reg = 1,
+ .mask = WM831X_RTC_PER_EINT,
+ },
+ [WM831X_IRQ_RTC_ALM] = {
+ .primary = WM831X_RTC_INT,
+ .reg = 1,
+ .mask = WM831X_RTC_ALM_EINT,
+ },
+ [WM831X_IRQ_CHG_BATT_HOT] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_BATT_HOT_EINT,
+ },
+ [WM831X_IRQ_CHG_BATT_COLD] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_BATT_COLD_EINT,
+ },
+ [WM831X_IRQ_CHG_BATT_FAIL] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_BATT_FAIL_EINT,
+ },
+ [WM831X_IRQ_CHG_OV] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_OV_EINT,
+ },
+ [WM831X_IRQ_CHG_END] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_END_EINT,
+ },
+ [WM831X_IRQ_CHG_TO] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_TO_EINT,
+ },
+ [WM831X_IRQ_CHG_MODE] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_MODE_EINT,
+ },
+ [WM831X_IRQ_CHG_START] = {
+ .primary = WM831X_CHG_INT,
+ .reg = 2,
+ .mask = WM831X_CHG_START_EINT,
+ },
+ [WM831X_IRQ_TCHDATA] = {
+ .primary = WM831X_TCHDATA_INT,
+ .reg = 1,
+ .mask = WM831X_TCHDATA_EINT,
+ },
+ [WM831X_IRQ_TCHPD] = {
+ .primary = WM831X_TCHPD_INT,
+ .reg = 1,
+ .mask = WM831X_TCHPD_EINT,
+ },
+ [WM831X_IRQ_AUXADC_DATA] = {
+ .primary = WM831X_AUXADC_INT,
+ .reg = 1,
+ .mask = WM831X_AUXADC_DATA_EINT,
+ },
+ [WM831X_IRQ_AUXADC_DCOMP1] = {
+ .primary = WM831X_AUXADC_INT,
+ .reg = 1,
+ .mask = WM831X_AUXADC_DCOMP1_EINT,
+ },
+ [WM831X_IRQ_AUXADC_DCOMP2] = {
+ .primary = WM831X_AUXADC_INT,
+ .reg = 1,
+ .mask = WM831X_AUXADC_DCOMP2_EINT,
+ },
+ [WM831X_IRQ_AUXADC_DCOMP3] = {
+ .primary = WM831X_AUXADC_INT,
+ .reg = 1,
+ .mask = WM831X_AUXADC_DCOMP3_EINT,
+ },
+ [WM831X_IRQ_AUXADC_DCOMP4] = {
+ .primary = WM831X_AUXADC_INT,
+ .reg = 1,
+ .mask = WM831X_AUXADC_DCOMP4_EINT,
+ },
+ [WM831X_IRQ_CS1] = {
+ .primary = WM831X_CS_INT,
+ .reg = 2,
+ .mask = WM831X_CS1_EINT,
+ },
+ [WM831X_IRQ_CS2] = {
+ .primary = WM831X_CS_INT,
+ .reg = 2,
+ .mask = WM831X_CS2_EINT,
+ },
+ [WM831X_IRQ_HC_DC1] = {
+ .primary = WM831X_HC_INT,
+ .reg = 4,
+ .mask = WM831X_HC_DC1_EINT,
+ },
+ [WM831X_IRQ_HC_DC2] = {
+ .primary = WM831X_HC_INT,
+ .reg = 4,
+ .mask = WM831X_HC_DC2_EINT,
+ },
+ [WM831X_IRQ_UV_LDO1] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO1_EINT,
+ },
+ [WM831X_IRQ_UV_LDO2] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO2_EINT,
+ },
+ [WM831X_IRQ_UV_LDO3] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO3_EINT,
+ },
+ [WM831X_IRQ_UV_LDO4] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO4_EINT,
+ },
+ [WM831X_IRQ_UV_LDO5] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO5_EINT,
+ },
+ [WM831X_IRQ_UV_LDO6] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO6_EINT,
+ },
+ [WM831X_IRQ_UV_LDO7] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO7_EINT,
+ },
+ [WM831X_IRQ_UV_LDO8] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO8_EINT,
+ },
+ [WM831X_IRQ_UV_LDO9] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO9_EINT,
+ },
+ [WM831X_IRQ_UV_LDO10] = {
+ .primary = WM831X_UV_INT,
+ .reg = 3,
+ .mask = WM831X_UV_LDO10_EINT,
+ },
+ [WM831X_IRQ_UV_DC1] = {
+ .primary = WM831X_UV_INT,
+ .reg = 4,
+ .mask = WM831X_UV_DC1_EINT,
+ },
+ [WM831X_IRQ_UV_DC2] = {
+ .primary = WM831X_UV_INT,
+ .reg = 4,
+ .mask = WM831X_UV_DC2_EINT,
+ },
+ [WM831X_IRQ_UV_DC3] = {
+ .primary = WM831X_UV_INT,
+ .reg = 4,
+ .mask = WM831X_UV_DC3_EINT,
+ },
+ [WM831X_IRQ_UV_DC4] = {
+ .primary = WM831X_UV_INT,
+ .reg = 4,
+ .mask = WM831X_UV_DC4_EINT,
+ },
+};
+
+static inline int irq_data_to_status_reg(struct wm831x_irq_data *irq_data)
+{
+ return WM831X_INTERRUPT_STATUS_1 - 1 + irq_data->reg;
+}
+
+static inline struct wm831x_irq_data *irq_to_wm831x_irq(struct wm831x *wm831x,
+ int irq)
+{
+ return &wm831x_irqs[irq];
+}
+
+static void wm831x_irq_lock(struct irq_data *data)
+{
+ struct wm831x *wm831x = irq_data_get_irq_chip_data(data);
+
+ mutex_lock(&wm831x->irq_lock);
+}
+
+static void wm831x_irq_sync_unlock(struct irq_data *data)
+{
+ struct wm831x *wm831x = irq_data_get_irq_chip_data(data);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(wm831x->gpio_update); i++) {
+ if (wm831x->gpio_update[i]) {
+ wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + i,
+ WM831X_GPN_INT_MODE | WM831X_GPN_POL,
+ wm831x->gpio_update[i]);
+ wm831x->gpio_update[i] = 0;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(wm831x->irq_masks_cur); i++) {
+ /* If there's been a change in the mask write it back
+ * to the hardware. */
+ if (wm831x->irq_masks_cur[i] != wm831x->irq_masks_cache[i]) {
+ dev_dbg(wm831x->dev, "IRQ mask sync: %x = %x\n",
+ WM831X_INTERRUPT_STATUS_1_MASK + i,
+ wm831x->irq_masks_cur[i]);
+
+ wm831x->irq_masks_cache[i] = wm831x->irq_masks_cur[i];
+ wm831x_reg_write(wm831x,
+ WM831X_INTERRUPT_STATUS_1_MASK + i,
+ wm831x->irq_masks_cur[i]);
+ }
+ }
+
+ mutex_unlock(&wm831x->irq_lock);
+}
+
+static void wm831x_irq_enable(struct irq_data *data)
+{
+ struct wm831x *wm831x = irq_data_get_irq_chip_data(data);
+ struct wm831x_irq_data *irq_data = irq_to_wm831x_irq(wm831x,
+ data->hwirq);
+
+ wm831x->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
+}
+
+static void wm831x_irq_disable(struct irq_data *data)
+{
+ struct wm831x *wm831x = irq_data_get_irq_chip_data(data);
+ struct wm831x_irq_data *irq_data = irq_to_wm831x_irq(wm831x,
+ data->hwirq);
+
+ wm831x->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
+}
+
+static int wm831x_irq_set_type(struct irq_data *data, unsigned int type)
+{
+ struct wm831x *wm831x = irq_data_get_irq_chip_data(data);
+ int irq;
+
+ irq = data->hwirq;
+
+ if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11) {
+ /* Ignore internal-only IRQs */
+ if (irq >= 0 && irq < WM831X_NUM_IRQS)
+ return 0;
+ else
+ return -EINVAL;
+ }
+
+ /* Rebase the IRQ into the GPIO range so we've got a sensible array
+ * index.
+ */
+ irq -= WM831X_IRQ_GPIO_1;
+
+ /* We set the high bit to flag that we need an update; don't
+ * do the update here as we can be called with the bus lock
+ * held.
+ */
+ wm831x->gpio_level_low[irq] = false;
+ wm831x->gpio_level_high[irq] = false;
+ switch (type) {
+ case IRQ_TYPE_EDGE_BOTH:
+ wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_INT_MODE;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_POL;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ wm831x->gpio_update[irq] = 0x10000;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_POL;
+ wm831x->gpio_level_high[irq] = true;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ wm831x->gpio_update[irq] = 0x10000;
+ wm831x->gpio_level_low[irq] = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct irq_chip wm831x_irq_chip = {
+ .name = "wm831x",
+ .irq_bus_lock = wm831x_irq_lock,
+ .irq_bus_sync_unlock = wm831x_irq_sync_unlock,
+ .irq_disable = wm831x_irq_disable,
+ .irq_enable = wm831x_irq_enable,
+ .irq_set_type = wm831x_irq_set_type,
+};
+
+/* The processing of the primary interrupt occurs in a thread so that
+ * we can interact with the device over I2C or SPI. */
+static irqreturn_t wm831x_irq_thread(int irq, void *data)
+{
+ struct wm831x *wm831x = data;
+ unsigned int i;
+ int primary, status_addr, ret;
+ int status_regs[WM831X_NUM_IRQ_REGS] = { 0 };
+ int read[WM831X_NUM_IRQ_REGS] = { 0 };
+ int *status;
+
+ primary = wm831x_reg_read(wm831x, WM831X_SYSTEM_INTERRUPTS);
+ if (primary < 0) {
+ dev_err(wm831x->dev, "Failed to read system interrupt: %d\n",
+ primary);
+ goto out;
+ }
+
+ /* The touch interrupts are visible in the primary register as
+ * an optimisation; open code this to avoid complicating the
+ * main handling loop and so we can also skip iterating the
+ * descriptors.
+ */
+ if (primary & WM831X_TCHPD_INT)
+ handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
+ WM831X_IRQ_TCHPD));
+ if (primary & WM831X_TCHDATA_INT)
+ handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
+ WM831X_IRQ_TCHDATA));
+ primary &= ~(WM831X_TCHDATA_EINT | WM831X_TCHPD_EINT);
+
+ for (i = 0; i < ARRAY_SIZE(wm831x_irqs); i++) {
+ int offset = wm831x_irqs[i].reg - 1;
+
+ if (!(primary & wm831x_irqs[i].primary))
+ continue;
+
+ status = &status_regs[offset];
+
+ /* Hopefully there should only be one register to read
+ * each time otherwise we ought to do a block read. */
+ if (!read[offset]) {
+ status_addr = irq_data_to_status_reg(&wm831x_irqs[i]);
+
+ *status = wm831x_reg_read(wm831x, status_addr);
+ if (*status < 0) {
+ dev_err(wm831x->dev,
+ "Failed to read IRQ status: %d\n",
+ *status);
+ goto out;
+ }
+
+ read[offset] = 1;
+
+ /* Ignore any bits that we don't think are masked */
+ *status &= ~wm831x->irq_masks_cur[offset];
+
+ /* Acknowledge now so we don't miss
+ * notifications while we handle.
+ */
+ wm831x_reg_write(wm831x, status_addr, *status);
+ }
+
+ if (*status & wm831x_irqs[i].mask)
+ handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
+ i));
+
+ /* Simulate an edge triggered IRQ by polling the input
+ * status. This is sucky but improves interoperability.
+ */
+ if (primary == WM831X_GP_INT &&
+ wm831x->gpio_level_high[i - WM831X_IRQ_GPIO_1]) {
+ ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL);
+ while (ret & 1 << (i - WM831X_IRQ_GPIO_1)) {
+ handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
+ i));
+ ret = wm831x_reg_read(wm831x,
+ WM831X_GPIO_LEVEL);
+ }
+ }
+
+ if (primary == WM831X_GP_INT &&
+ wm831x->gpio_level_low[i - WM831X_IRQ_GPIO_1]) {
+ ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL);
+ while (!(ret & 1 << (i - WM831X_IRQ_GPIO_1))) {
+ handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
+ i));
+ ret = wm831x_reg_read(wm831x,
+ WM831X_GPIO_LEVEL);
+ }
+ }
+ }
+
+out:
+ return IRQ_HANDLED;
+}
+
+static int wm831x_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ irq_set_chip_data(virq, h->host_data);
+ irq_set_chip_and_handler(virq, &wm831x_irq_chip, handle_edge_irq);
+ irq_set_nested_thread(virq, 1);
+
+ /* ARM needs us to explicitly flag the IRQ as valid
+ * and will set them noprobe when we do so. */
+#ifdef CONFIG_ARM
+ set_irq_flags(virq, IRQF_VALID);
+#else
+ irq_set_noprobe(virq);
+#endif
+
+ return 0;
+}
+
+static struct irq_domain_ops wm831x_irq_domain_ops = {
+ .map = wm831x_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+int wm831x_irq_init(struct wm831x *wm831x, int irq)
+{
+ struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
+ struct irq_domain *domain;
+ int i, ret, irq_base;
+
+ mutex_init(&wm831x->irq_lock);
+
+ /* Mask the individual interrupt sources */
+ for (i = 0; i < ARRAY_SIZE(wm831x->irq_masks_cur); i++) {
+ wm831x->irq_masks_cur[i] = 0xffff;
+ wm831x->irq_masks_cache[i] = 0xffff;
+ wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_1_MASK + i,
+ 0xffff);
+ }
+
+ /* Try to dynamically allocate IRQs if no base is specified */
+ if (pdata && pdata->irq_base) {
+ irq_base = irq_alloc_descs(pdata->irq_base, 0,
+ WM831X_NUM_IRQS, 0);
+ if (irq_base < 0) {
+ dev_warn(wm831x->dev, "Failed to allocate IRQs: %d\n",
+ irq_base);
+ irq_base = 0;
+ }
+ } else {
+ irq_base = 0;
+ }
+
+ if (irq_base)
+ domain = irq_domain_add_legacy(wm831x->dev->of_node,
+ ARRAY_SIZE(wm831x_irqs),
+ irq_base, 0,
+ &wm831x_irq_domain_ops,
+ wm831x);
+ else
+ domain = irq_domain_add_linear(wm831x->dev->of_node,
+ ARRAY_SIZE(wm831x_irqs),
+ &wm831x_irq_domain_ops,
+ wm831x);
+
+ if (!domain) {
+ dev_warn(wm831x->dev, "Failed to allocate IRQ domain\n");
+ return -EINVAL;
+ }
+
+ if (pdata && pdata->irq_cmos)
+ i = 0;
+ else
+ i = WM831X_IRQ_OD;
+
+ wm831x_set_bits(wm831x, WM831X_IRQ_CONFIG,
+ WM831X_IRQ_OD, i);
+
+ wm831x->irq = irq;
+ wm831x->irq_domain = domain;
+
+ if (irq) {
+ /* Try to flag /IRQ as a wake source; there are a number of
+ * unconditional wake sources in the PMIC so this isn't
+ * conditional but we don't actually care *too* much if it
+ * fails.
+ */
+ ret = enable_irq_wake(irq);
+ if (ret != 0) {
+ dev_warn(wm831x->dev,
+ "Can't enable IRQ as wake source: %d\n",
+ ret);
+ }
+
+ ret = request_threaded_irq(irq, NULL, wm831x_irq_thread,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "wm831x", wm831x);
+ if (ret != 0) {
+ dev_err(wm831x->dev, "Failed to request IRQ %d: %d\n",
+ irq, ret);
+ return ret;
+ }
+ } else {
+ dev_warn(wm831x->dev,
+ "No interrupt specified - functionality limited\n");
+ }
+
+ /* Enable top level interrupts, we mask at secondary level */
+ wm831x_reg_write(wm831x, WM831X_SYSTEM_INTERRUPTS_MASK, 0);
+
+ return 0;
+}
+
+void wm831x_irq_exit(struct wm831x *wm831x)
+{
+ if (wm831x->irq)
+ free_irq(wm831x->irq, wm831x);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 02:29:14 +0000