[rtc-linux] [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[rtc-linux] [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[Sudeep Holla]

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/rtc/rtc-pl031.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 41dcb7ddb906..e1687e19c59f 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -23,6 +23,7 @@
 #include <linux/io.h>
 #include <linux/bcd.h>
 #include <linux/delay.h>
+#include <linux/pm_wakeirq.h>
 #include <linux/slab.h>
 
 /*
@@ -305,6 +306,8 @@ static int pl031_remove(struct amba_device *adev)
 {
 	struct pl031_local *ldata = dev_get_drvdata(&adev->dev);
 
+	dev_pm_clear_wake_irq(&adev->dev);
+	device_init_wakeup(&adev->dev, false);
 	free_irq(adev->irq[0], ldata);
 	rtc_device_unregister(ldata->rtc);
 	iounmap(ldata->base);
@@ -370,7 +373,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
 		}
 	}
 
-	device_init_wakeup(&adev->dev, 1);
+	device_init_wakeup(&adev->dev, true);
 	ldata->rtc = rtc_device_register("pl031", &adev->dev, ops,
 					THIS_MODULE);
 	if (IS_ERR(ldata->rtc)) {
@@ -383,7 +386,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
 		ret = -EIO;
 		goto out_no_irq;
 	}
-
+	dev_pm_set_wake_irq(&adev->dev, adev->irq[0]);
 	return 0;
 
 out_no_irq:
@@ -408,7 +411,6 @@ static struct pl031_vendor_data arm_pl031 = {
 		.set_alarm = pl031_set_alarm,
 		.alarm_irq_enable = pl031_alarm_irq_enable,
 	},
-	.irqflags = IRQF_NO_SUSPEND,
 };
 
 /* The First ST derivative */
@@ -422,7 +424,6 @@ static struct pl031_vendor_data stv1_pl031 = {
 	},
 	.clockwatch = true,
 	.st_weekday = true,
-	.irqflags = IRQF_NO_SUSPEND,
 };
 
 /* And the second ST derivative */
@@ -439,8 +440,10 @@ static struct pl031_vendor_data stv2_pl031 = {
 	/*
 	 * This variant shares the IRQ with another block and must not
 	 * suspend that IRQ line.
+	 * TODO check if it shares with IRQF_NO_SUSPEND user, else we can
+	 * remove IRQF_COND_SUSPEND
 	 */
-	.irqflags = IRQF_SHARED | IRQF_NO_SUSPEND,
+	.irqflags = IRQF_SHARED | IRQF_COND_SUSPEND,
 };
 
 static struct amba_id pl031_ids[] = {
-- 
1.9.1

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[rtc-linux] [PATCH 02/17] rtc: ab8500: remove misuse of IRQF_NO_SUSPEND flag

[Sudeep Holla]

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/rtc/rtc-ab8500.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 51407c4c7bd2..24a0af650a1b 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -18,6 +18,7 @@
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/pm_wakeirq.h>
 
 #define AB8500_RTC_SOFF_STAT_REG	0x00
 #define AB8500_RTC_CC_CONF_REG		0x01
@@ -493,11 +494,12 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
 	}
 
 	err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-			rtc_alarm_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT,
+			rtc_alarm_handler, IRQF_ONESHOT,
 			"ab8500-rtc", rtc);
 	if (err < 0)
 		return err;
 
+	dev_pm_set_wake_irq(&pdev->dev, irq);
 	platform_set_drvdata(pdev, rtc);
 
 	err = ab8500_sysfs_rtc_register(&pdev->dev);
@@ -513,6 +515,8 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
 
 static int ab8500_rtc_remove(struct platform_device *pdev)
 {
+	dev_pm_clear_wake_irq(&pdev->dev);
+	device_init_wakeup(&pdev->dev, false);
 	ab8500_sysfs_rtc_unregister(&pdev->dev);
 
 	return 0;
-- 
1.9.1

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[rtc-linux] [PATCH 06/17] rtc: ds1343: remove misuse of IRQF_NO_SUSPEND flag

[Sudeep Holla]

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/rtc/rtc-ds1343.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c
index 79a06dd3c185..615ce5c370eb 100644
--- a/drivers/rtc/rtc-ds1343.c
+++ b/drivers/rtc/rtc-ds1343.c
@@ -21,6 +21,7 @@
 #include <linux/rtc.h>
 #include <linux/bcd.h>
 #include <linux/pm.h>
+#include <linux/pm_wakeirq.h>
 #include <linux/slab.h>
 
 #define DS1343_DRV_VERSION	"01.00"
@@ -663,15 +664,15 @@ static int ds1343_probe(struct spi_device *spi)
 
 	if (priv->irq >= 0) {
 		res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
-						ds1343_thread,
-						IRQF_NO_SUSPEND | IRQF_ONESHOT,
+						ds1343_thread, IRQF_ONESHOT,
 						"ds1343", priv);
 		if (res) {
 			priv->irq = -1;
 			dev_err(&spi->dev,
 				"unable to request irq for rtc ds1343\n");
 		} else {
-			device_set_wakeup_capable(&spi->dev, 1);
+			device_init_wakeup(&spi->dev, true);
+			dev_pm_set_wake_irq(&spi->dev, spi->irq);
 		}
 	}
 
@@ -692,6 +693,8 @@ static int ds1343_remove(struct spi_device *spi)
 		priv->irqen &= ~RTC_AF;
 		mutex_unlock(&priv->mutex);
 
+		dev_pm_clear_wake_irq(&spi->dev);
+		device_init_wakeup(&spi->dev, false);
 		devm_free_irq(&spi->dev, spi->irq, priv);
 	}
 
-- 
1.9.1

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[rtc-linux] Re: [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[Linus Walleij]

On Mon, Sep 21, 2015 at 8:46 AM, Sudeep Holla <sudeep.holla@arm.com> wrote:

> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
> be left enabled so as to allow them to work as expected during the
> suspend-resume cycle, but doesn't guarantee that it will wake the system
> from a suspended state, enable_irq_wake is recommended to be used for
> the wakeup.
>
> This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
> introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Alessandro Zummo <a.zummo@towertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Cc: rtc-linux@googlegroups.com
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Looks correct to me.
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

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[rtc-linux] Re: [PATCH 02/17] rtc: ab8500: remove misuse of IRQF_NO_SUSPEND flag

[Linus Walleij]

On Mon, Sep 21, 2015 at 8:46 AM, Sudeep Holla <sudeep.holla@arm.com> wrote:

> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
> be left enabled so as to allow them to work as expected during the
> suspend-resume cycle, but doesn't guarantee that it will wake the system
> from a suspended state, enable_irq_wake is recommended to be used for
> the wakeup.
>
> This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
> introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Alessandro Zummo <a.zummo@towertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Cc: rtc-linux@googlegroups.com
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

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[rtc-linux] Re: [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[Sudeep Holla]

On 02/10/15 11:40, Linus Walleij wrote:
> On Mon, Sep 21, 2015 at 8:46 AM, Sudeep Holla <sudeep.holla@arm.com> wrote:
>
>> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
>> be left enabled so as to allow them to work as expected during the
>> suspend-resume cycle, but doesn't guarantee that it will wake the system
>> from a suspended state, enable_irq_wake is recommended to be used for
>> the wakeup.
>>
>> This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
>> introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
>>
>> Cc: Linus Walleij <linus.walleij@linaro.org>
>> Cc: Alessandro Zummo <a.zummo@towertech.it>
>> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
>> Cc: rtc-linux@googlegroups.com
>> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
>
> Looks correct to me.
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
>

Thanks, while you are at it, do you know what interrupt stv2_pl031
shares so that I can fix the TODO in the comment or the code(whichever
applicable).

Regards,
Sudeep

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[rtc-linux] Re: [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[Alexandre Belloni]

On 02/10/2015 at 11:45:18 +0100, Sudeep Holla wrote :
> 
> 
> On 02/10/15 11:40, Linus Walleij wrote:
> >On Mon, Sep 21, 2015 at 8:46 AM, Sudeep Holla <sudeep.holla@arm.com> wrote:
> >
> >>The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
> >>be left enabled so as to allow them to work as expected during the
> >>suspend-resume cycle, but doesn't guarantee that it will wake the system
> >>from a suspended state, enable_irq_wake is recommended to be used for
> >>the wakeup.
> >>
> >>This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
> >>introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
> >>
> >>Cc: Linus Walleij <linus.walleij@linaro.org>
> >>Cc: Alessandro Zummo <a.zummo@towertech.it>
> >>Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> >>Cc: rtc-linux@googlegroups.com
> >>Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> >
> >Looks correct to me.
> >Acked-by: Linus Walleij <linus.walleij@linaro.org>
> >
> 
> Thanks, while you are at it, do you know what interrupt stv2_pl031
> shares so that I can fix the TODO in the comment or the code(whichever
> applicable).
> 

So that you know, I'm planning to apply them this weekend, I couldn't
find time to do it before.

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Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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[rtc-linux] Re: [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[Alexandre Belloni]

On 21/09/2015 at 16:46:57 +0100, Sudeep Holla wrote :
> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
> be left enabled so as to allow them to work as expected during the
> suspend-resume cycle, but doesn't guarantee that it will wake the system
> from a suspended state, enable_irq_wake is recommended to be used for
> the wakeup.
> 
> This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
> introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
> 
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Alessandro Zummo <a.zummo@towertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Cc: rtc-linux@googlegroups.com
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
>  drivers/rtc/rtc-pl031.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
Applied, thanks.

-- 
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Embedded Linux, Kernel and Android engineering
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[rtc-linux] Re: [PATCH 02/17] rtc: ab8500: remove misuse of IRQF_NO_SUSPEND flag

[Alexandre Belloni]

On 21/09/2015 at 16:46:58 +0100, Sudeep Holla wrote :
> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
> be left enabled so as to allow them to work as expected during the
> suspend-resume cycle, but doesn't guarantee that it will wake the system
> from a suspended state, enable_irq_wake is recommended to be used for
> the wakeup.
> 
> This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
> introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
> 
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Alessandro Zummo <a.zummo@towertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Cc: rtc-linux@googlegroups.com
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
>  drivers/rtc/rtc-ab8500.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
Applied, thanks.

-- 
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[rtc-linux] Re: [PATCH 06/17] rtc: ds1343: remove misuse of IRQF_NO_SUSPEND flag

[Alexandre Belloni]

On 21/09/2015 at 16:47:02 +0100, Sudeep Holla wrote :
> The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
> be left enabled so as to allow them to work as expected during the
> suspend-resume cycle, but doesn't guarantee that it will wake the system
> from a suspended state, enable_irq_wake is recommended to be used for
> the wakeup.
> 
> This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
> introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.
> 
> Cc: Alessandro Zummo <a.zummo@towertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Cc: rtc-linux@googlegroups.com
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
>  drivers/rtc/rtc-ds1343.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
Applied, thanks.

-- 
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Embedded Linux, Kernel and Android engineering
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[rtc-linux] Re: [PATCH 01/17] rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

[Linus Walleij]

On Fri, Oct 2, 2015 at 12:45 PM, Sudeep Holla <sudeep.holla@arm.com> wrote:

>> Looks correct to me.
>> Acked-by: Linus Walleij <linus.walleij@linaro.org>
>
> Thanks, while you are at it, do you know what interrupt stv2_pl031
> shares so that I can fix the TODO in the comment or the code(whichever
> applicable).

This is shared with a hardware called RTT (real-time timer) that has
no upstream driver as of now.

Yours,
Linus Walleij

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