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Subject[PATCH 2/2] rtc: fsl-ftm-alarm: fix freeze(s2idle) doesnot wake
Date
Use dev_pm_set_wake_irq() instead of flag IRQF_NO_SUSPEND to enable
wakeup system feature for both freeze(s2idle) and mem(deep).

Use property 'wakeup-source' to control this feature.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
---
drivers/rtc/rtc-fsl-ftm-alarm.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-fsl-ftm-alarm.c b/drivers/rtc/rtc-fsl-ftm-alarm.c
index 756af62..c6945d84 100644
--- a/drivers/rtc/rtc-fsl-ftm-alarm.c
+++ b/drivers/rtc/rtc-fsl-ftm-alarm.c
@@ -21,6 +21,7 @@
#include <linux/rtc.h>
#include <linux/time.h>
#include <linux/acpi.h>
+#include <linux/pm_wakeirq.h>

#define FTM_SC_CLK(c) ((c) << FTM_SC_CLK_MASK_SHIFT)

@@ -41,6 +42,7 @@ struct ftm_rtc {
struct rtc_device *rtc_dev;
void __iomem *base;
bool big_endian;
+ bool wakeup;
u32 alarm_freq;
};

@@ -267,6 +269,9 @@ static int ftm_rtc_probe(struct platform_device *pdev)
return PTR_ERR(rtc->base);
}

+ rtc->wakeup =
+ device_property_read_bool(&pdev->dev, "wakeup-source");
+
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "can't get irq number\n");
@@ -274,7 +279,7 @@ static int ftm_rtc_probe(struct platform_device *pdev)
}

ret = devm_request_irq(&pdev->dev, irq, ftm_rtc_alarm_interrupt,
- IRQF_NO_SUSPEND, dev_name(&pdev->dev), rtc);
+ 0, dev_name(&pdev->dev), rtc);
if (ret < 0) {
dev_err(&pdev->dev, "failed to request irq\n");
return ret;
@@ -286,7 +291,10 @@ static int ftm_rtc_probe(struct platform_device *pdev)
rtc->alarm_freq = (u32)FIXED_FREQ_CLK / (u32)MAX_FREQ_DIV;
rtc->rtc_dev->ops = &ftm_rtc_ops;

- device_init_wakeup(&pdev->dev, true);
+ device_init_wakeup(&pdev->dev, rtc->wakeup);
+ ret = dev_pm_set_wake_irq(&pdev->dev, irq);
+ if (ret)
+ dev_err(&pdev->dev, "irq wake enable failed.\n");

ret = rtc_register_device(rtc->rtc_dev);
if (ret) {
--
2.7.4
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