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Groups > linux.kernel > #1513628 > unrolled thread
| Started by | Wenyou Yang <wenyou.yang@atmel.com> |
|---|---|
| First post | 2016-11-02 03:50 +0100 |
| Last post | 2016-11-02 09:40 +0100 |
| Articles | 2 — 2 participants |
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[PATCH v1] iio: adc: at91: add suspend and resume callback Wenyou Yang <wenyou.yang@atmel.com> - 2016-11-02 03:50 +0100
Re: [PATCH v1] iio: adc: at91: add suspend and resume callback Ludovic Desroches <ludovic.desroches@atmel.com> - 2016-11-02 09:40 +0100
| From | Wenyou Yang <wenyou.yang@atmel.com> |
|---|---|
| Date | 2016-11-02 03:50 +0100 |
| Subject | [PATCH v1] iio: adc: at91: add suspend and resume callback |
| Message-ID | <syTMJ-ex-3@gated-at.bofh.it> |
Add suspend/resume callback, support the pinctrl sleep state when
the system suspend as well.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
drivers/iio/adc/at91_adc.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index bbdac07..ffa81a1 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -30,6 +30,7 @@
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
+#include <linux/pinctrl/consumer.h>
/* Registers */
#define AT91_ADC_CR 0x00 /* Control Register */
@@ -1347,6 +1348,39 @@ static int at91_adc_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int at91_adc_suspend(struct device *dev)
+{
+ struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
+ struct at91_adc_state *st = iio_priv(idev);
+
+ pinctrl_pm_select_sleep_state(dev);
+ clk_disable_unprepare(st->clk);
+
+ return 0;
+}
+
+static int at91_adc_resume(struct device *dev)
+{
+ struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
+ struct at91_adc_state *st = iio_priv(idev);
+
+ clk_prepare_enable(st->clk);
+ pinctrl_pm_select_default_state(dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops at91_adc_pm_ops = {
+ .suspend = at91_adc_suspend,
+ .resume = at91_adc_resume,
+};
+
+#define AT91_ADC_PM_OPS (&at91_adc_pm_ops)
+#else
+#define AT91_ADC_PM_OPS NULL
+#endif
+
static struct at91_adc_caps at91sam9260_caps = {
.calc_startup_ticks = calc_startup_ticks_9260,
.num_channels = 4,
@@ -1441,6 +1475,7 @@ static struct platform_driver at91_adc_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = of_match_ptr(at91_adc_dt_ids),
+ .pm = AT91_ADC_PM_OPS,
},
};
--
2.7.4
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| From | Ludovic Desroches <ludovic.desroches@atmel.com> |
|---|---|
| Date | 2016-11-02 09:40 +0100 |
| Message-ID | <syZfr-3TD-11@gated-at.bofh.it> |
| In reply to | #1513628 |
On Wed, Nov 02, 2016 at 10:40:16AM +0800, Wenyou Yang wrote:
> Add suspend/resume callback, support the pinctrl sleep state when
> the system suspend as well.
>
> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> ---
>
> drivers/iio/adc/at91_adc.c | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)
>
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index bbdac07..ffa81a1 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -30,6 +30,7 @@
> #include <linux/iio/trigger.h>
> #include <linux/iio/trigger_consumer.h>
> #include <linux/iio/triggered_buffer.h>
> +#include <linux/pinctrl/consumer.h>
>
> /* Registers */
> #define AT91_ADC_CR 0x00 /* Control Register */
> @@ -1347,6 +1348,39 @@ static int at91_adc_remove(struct platform_device *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_PM
I would use CONFIG_PM_SLEEP
> +static int at91_adc_suspend(struct device *dev)
> +{
> + struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
> + struct at91_adc_state *st = iio_priv(idev);
> +
> + pinctrl_pm_select_sleep_state(dev);
> + clk_disable_unprepare(st->clk);
> +
> + return 0;
> +}
> +
> +static int at91_adc_resume(struct device *dev)
> +{
> + struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
> + struct at91_adc_state *st = iio_priv(idev);
> +
> + clk_prepare_enable(st->clk);
> + pinctrl_pm_select_default_state(dev);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops at91_adc_pm_ops = {
> + .suspend = at91_adc_suspend,
> + .resume = at91_adc_resume,
> +};
> +
> +#define AT91_ADC_PM_OPS (&at91_adc_pm_ops)
> +#else
> +#define AT91_ADC_PM_OPS NULL
> +#endif
> +
and this macro: SET_SYSTEM_SLEEP_PM_OPS
Regards
Ludovic
> static struct at91_adc_caps at91sam9260_caps = {
> .calc_startup_ticks = calc_startup_ticks_9260,
> .num_channels = 4,
> @@ -1441,6 +1475,7 @@ static struct platform_driver at91_adc_driver = {
> .driver = {
> .name = DRIVER_NAME,
> .of_match_table = of_match_ptr(at91_adc_dt_ids),
> + .pm = AT91_ADC_PM_OPS,
> },
> };
>
> --
> 2.7.4
>
> --
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