Commit-ID: 73958b31c1c1d94010ba840d7f5ac118bbbdafb5
Gitweb: https://git.kernel.org/tip/73958b31c1c1d94010ba840d7f5ac118bbbdafb5
Author: Ludovic Barre <ludovic.barre@xxxxxx>
AuthorDate: Thu, 26 Apr 2018 18:18:31 +0200
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Thu, 24 May 2018 12:38:22 +0100
irqchip/stm32: Add suspend/resume support for hierarchy domain
This patch adds suspend/resume feature for exti hierarchy domain.
-suspend function sets wake_active into imr of each banks
-resume function restores the mask_cache interrupt into
imr of each banks
Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-stm32-exti.c | 49 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index ebf71460c668..5089c1e2838d 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -14,6 +14,7 @@
#include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/syscore_ops.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -59,6 +60,8 @@ struct stm32_exti_host_data {
const struct stm32_exti_drv_data *drv_data;
};
+static struct stm32_exti_host_data *stm32_host_data;
+
static const struct stm32_exti_bank stm32f4xx_exti_b1 = {
.imr_ofst = 0x00,
.emr_ofst = 0x04,
@@ -498,6 +501,48 @@ static int stm32_exti_h_set_affinity(struct irq_data *d,
return -EINVAL;
}
+#ifdef CONFIG_PM
+static int stm32_exti_h_suspend(void)
+{
+ struct stm32_exti_chip_data *chip_data;
+ int i;
+
+ for (i = 0; i < stm32_host_data->drv_data->bank_nr; i++) {
+ chip_data = &stm32_host_data->chips_data[i];
+ raw_spin_lock(&chip_data->rlock);
+ stm32_chip_suspend(chip_data, chip_data->wake_active);
+ raw_spin_unlock(&chip_data->rlock);
+ }
+
+ return 0;
+}
+
+static void stm32_exti_h_resume(void)
+{
+ struct stm32_exti_chip_data *chip_data;
+ int i;
+
+ for (i = 0; i < stm32_host_data->drv_data->bank_nr; i++) {
+ chip_data = &stm32_host_data->chips_data[i];
+ raw_spin_lock(&chip_data->rlock);
+ stm32_chip_resume(chip_data, chip_data->mask_cache);
+ raw_spin_unlock(&chip_data->rlock);
+ }
+}
+
+static struct syscore_ops stm32_exti_h_syscore_ops = {
+ .suspend = stm32_exti_h_suspend,
+ .resume = stm32_exti_h_resume,
+};
+
+static void stm32_exti_h_syscore_init(void)
+{
+ register_syscore_ops(&stm32_exti_h_syscore_ops);
+}
+#else
+static inline void stm32_exti_h_syscore_init(void) {}
+#endif
+
static struct irq_chip stm32_exti_h_chip = {
.name = "stm32-exti-h",
.irq_eoi = stm32_exti_h_eoi,
@@ -567,6 +612,8 @@ stm32_exti_host_data *stm32_exti_host_init(const struct stm32_exti_drv_data *dd,
return NULL;
}
+ stm32_host_data = host_data;
+
return host_data;
}
@@ -725,6 +772,8 @@ __init stm32_exti_hierarchy_init(const struct stm32_exti_drv_data *drv_data,
goto out_unmap;
}
+ stm32_exti_h_syscore_init();
+
return 0;
out_unmap:
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|