From: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
If wake up irq is defined in device-tree cec adapter
could be used has wake up source.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
---
drivers/media/platform/stm32/stm32-cec.c | 44 +++++++++++++++++++++++++++++++-
1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/stm32/stm32-cec.c b/drivers/media/platform/stm32/stm32-cec.c
index 35cc2ffd6b96..68e18ee6655b 100644
--- a/drivers/media/platform/stm32/stm32-cec.c
+++ b/drivers/media/platform/stm32/stm32-cec.c
@@ -11,8 +11,11 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/of_irq.h>
#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
+#include <linux/pm_wakeirq.h>
#include <linux/regmap.h>
#include <media/cec.h>
@@ -243,7 +246,7 @@ static int stm32_cec_probe(struct platform_device *pdev)
struct resource *res;
struct stm32_cec *cec;
void __iomem *mmio;
- int ret;
+ int ret, wakeirq;
cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
if (!cec)
@@ -274,6 +277,12 @@ static int stm32_cec_probe(struct platform_device *pdev)
if (ret)
return ret;
+ wakeirq = of_irq_get_byname(pdev->dev.of_node, "wakeup");
+ if (wakeirq > 0) {
+ device_init_wakeup(&pdev->dev, true);
+ dev_pm_set_dedicated_wake_irq(&pdev->dev, wakeirq);
+ }
+
cec->clk_cec = devm_clk_get(&pdev->dev, "cec");
if (IS_ERR(cec->clk_cec)) {
dev_err(&pdev->dev, "Cannot get cec clock\n");
@@ -312,12 +321,44 @@ static int stm32_cec_remove(struct platform_device *pdev)
{
struct stm32_cec *cec = platform_get_drvdata(pdev);
+ dev_pm_clear_wake_irq(&pdev->dev);
+ device_init_wakeup(&pdev->dev, false);
+
cec_unregister_adapter(cec->adap);
pm_runtime_disable(&pdev->dev);
return 0;
}
+
+static int __maybe_unused stm32_cec_suspend(struct device *dev)
+{
+ struct stm32_cec *cec = dev_get_drvdata(dev);
+
+ pm_runtime_force_suspend(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(cec->irq);
+
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_cec_resume(struct device *dev)
+{
+ struct stm32_cec *cec = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(cec->irq);
+
+ pm_runtime_force_resume(dev);
+
+ return 0;
+}
+
static int __maybe_unused stm32_cec_runtime_suspend(struct device *dev)
{
struct stm32_cec *cec = dev_get_drvdata(dev);
@@ -341,6 +382,7 @@ static int __maybe_unused stm32_cec_runtime_resume(struct device *dev)
static const struct dev_pm_ops stm32_cec_pm_ops = {
SET_RUNTIME_PM_OPS(stm32_cec_runtime_suspend, stm32_cec_runtime_resume,
NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(stm32_cec_suspend, stm32_cec_resume)
};
static const struct of_device_id stm32_cec_of_match[] = {
--
2.15.0
