* [PATCH v3 0/1] iio: pulsedlight-lidar-lite: add runtime PM
@ 2015-11-08 6:10 ` Matt Ranostay
0 siblings, 0 replies; 6+ messages in thread
From: Matt Ranostay @ 2015-11-08 6:10 UTC (permalink / raw)
To: jic23-DgEjT+Ai2ygdnm+yROfE0A
Cc: linux-iio-u79uwXL29TY76Z2rM5mHXA,
linux-pm-u79uwXL29TY76Z2rM5mHXA,
k.kozlowski-Sze3O3UU22JBDgjK7y7TUQ, Matt Ranostay
Changes from v2:
* Remove un-needed mutex
* Move usleep_range to resume callback
Matt Ranostay (1):
iio: pulsedlight-lidar-lite: add runtime PM
drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 54 ++++++++++++++++++++++-
1 file changed, 53 insertions(+), 1 deletion(-)
--
1.9.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v3 0/1] iio: pulsedlight-lidar-lite: add runtime PM
@ 2015-11-08 6:10 ` Matt Ranostay
0 siblings, 0 replies; 6+ messages in thread
From: Matt Ranostay @ 2015-11-08 6:10 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-pm, k.kozlowski, Matt Ranostay
Changes from v2:
* Remove un-needed mutex
* Move usleep_range to resume callback
Matt Ranostay (1):
iio: pulsedlight-lidar-lite: add runtime PM
drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 54 ++++++++++++++++++++++-
1 file changed, 53 insertions(+), 1 deletion(-)
--
1.9.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v3 1/1] iio: pulsedlight-lidar-lite: add runtime PM
2015-11-08 6:10 ` Matt Ranostay
@ 2015-11-08 6:10 ` Matt Ranostay
-1 siblings, 0 replies; 6+ messages in thread
From: Matt Ranostay @ 2015-11-08 6:10 UTC (permalink / raw)
To: jic23-DgEjT+Ai2ygdnm+yROfE0A
Cc: linux-iio-u79uwXL29TY76Z2rM5mHXA,
linux-pm-u79uwXL29TY76Z2rM5mHXA,
k.kozlowski-Sze3O3UU22JBDgjK7y7TUQ, Matt Ranostay
Add runtime PM support for the lidar-lite module to enable low power
mode when last device requested reading is over a second.
Signed-off-by: Matt Ranostay <mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 53 ++++++++++++++++++++++-
1 file changed, 52 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
index 961f9f99..768b944 100644
--- a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
+++ b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
@@ -13,7 +13,7 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * TODO: runtime pm, interrupt mode, and signal strength reporting
+ * TODO: interrupt mode, and signal strength reporting
*/
#include <linux/err.h>
@@ -21,6 +21,7 @@
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/module.h>
+#include <linux/pm_runtime.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
@@ -37,6 +38,7 @@
#define LIDAR_REG_DATA_HBYTE 0x0f
#define LIDAR_REG_DATA_LBYTE 0x10
+#define LIDAR_REG_PWR_CONTROL 0x65
#define LIDAR_DRV_NAME "lidar"
@@ -90,6 +92,12 @@ static inline int lidar_write_control(struct lidar_data *data, int val)
return i2c_smbus_write_byte_data(data->client, LIDAR_REG_CONTROL, val);
}
+static inline int lidar_write_power(struct lidar_data *data, int val)
+{
+ return i2c_smbus_write_byte_data(data->client,
+ LIDAR_REG_PWR_CONTROL, val);
+}
+
static int lidar_read_measurement(struct lidar_data *data, u16 *reg)
{
int ret;
@@ -116,6 +124,8 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
int tries = 10;
int ret;
+ pm_runtime_get_sync(&client->dev);
+
/* start sample */
ret = lidar_write_control(data, LIDAR_REG_CONTROL_ACQUIRE);
if (ret < 0) {
@@ -144,6 +154,7 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
}
ret = -EIO;
}
+ pm_runtime_put_autosuspend(&client->dev);
return ret;
}
@@ -243,6 +254,15 @@ static int lidar_probe(struct i2c_client *client,
if (ret)
goto error_unreg_buffer;
+ pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+
+ pm_runtime_mark_last_busy(&client->dev);
+ pm_runtime_idle(&client->dev);
+
return 0;
error_unreg_buffer:
@@ -258,6 +278,9 @@ static int lidar_remove(struct i2c_client *client)
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
return 0;
}
@@ -273,10 +296,38 @@ static const struct of_device_id lidar_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, lidar_dt_ids);
+#ifdef CONFIG_PM
+static int lidar_pm_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct lidar_data *data = iio_priv(indio_dev);
+
+ return lidar_write_power(data, 0x0f);
+}
+
+static int lidar_pm_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct lidar_data *data = iio_priv(indio_dev);
+ int ret = lidar_write_power(data, 0);
+
+ /* regulator and FPGA needs settling time */
+ usleep_range(15000, 20000);
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops lidar_pm_ops = {
+ SET_RUNTIME_PM_OPS(lidar_pm_runtime_suspend,
+ lidar_pm_runtime_resume, NULL)
+};
+
static struct i2c_driver lidar_driver = {
.driver = {
.name = LIDAR_DRV_NAME,
.of_match_table = of_match_ptr(lidar_dt_ids),
+ .pm = &lidar_pm_ops,
},
.probe = lidar_probe,
.remove = lidar_remove,
--
1.9.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v3 1/1] iio: pulsedlight-lidar-lite: add runtime PM
@ 2015-11-08 6:10 ` Matt Ranostay
0 siblings, 0 replies; 6+ messages in thread
From: Matt Ranostay @ 2015-11-08 6:10 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, linux-pm, k.kozlowski, Matt Ranostay
Add runtime PM support for the lidar-lite module to enable low power
mode when last device requested reading is over a second.
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
---
drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 53 ++++++++++++++++++++++-
1 file changed, 52 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
index 961f9f99..768b944 100644
--- a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
+++ b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
@@ -13,7 +13,7 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * TODO: runtime pm, interrupt mode, and signal strength reporting
+ * TODO: interrupt mode, and signal strength reporting
*/
#include <linux/err.h>
@@ -21,6 +21,7 @@
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/module.h>
+#include <linux/pm_runtime.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
@@ -37,6 +38,7 @@
#define LIDAR_REG_DATA_HBYTE 0x0f
#define LIDAR_REG_DATA_LBYTE 0x10
+#define LIDAR_REG_PWR_CONTROL 0x65
#define LIDAR_DRV_NAME "lidar"
@@ -90,6 +92,12 @@ static inline int lidar_write_control(struct lidar_data *data, int val)
return i2c_smbus_write_byte_data(data->client, LIDAR_REG_CONTROL, val);
}
+static inline int lidar_write_power(struct lidar_data *data, int val)
+{
+ return i2c_smbus_write_byte_data(data->client,
+ LIDAR_REG_PWR_CONTROL, val);
+}
+
static int lidar_read_measurement(struct lidar_data *data, u16 *reg)
{
int ret;
@@ -116,6 +124,8 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
int tries = 10;
int ret;
+ pm_runtime_get_sync(&client->dev);
+
/* start sample */
ret = lidar_write_control(data, LIDAR_REG_CONTROL_ACQUIRE);
if (ret < 0) {
@@ -144,6 +154,7 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
}
ret = -EIO;
}
+ pm_runtime_put_autosuspend(&client->dev);
return ret;
}
@@ -243,6 +254,15 @@ static int lidar_probe(struct i2c_client *client,
if (ret)
goto error_unreg_buffer;
+ pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+
+ pm_runtime_mark_last_busy(&client->dev);
+ pm_runtime_idle(&client->dev);
+
return 0;
error_unreg_buffer:
@@ -258,6 +278,9 @@ static int lidar_remove(struct i2c_client *client)
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
return 0;
}
@@ -273,10 +296,38 @@ static const struct of_device_id lidar_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, lidar_dt_ids);
+#ifdef CONFIG_PM
+static int lidar_pm_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct lidar_data *data = iio_priv(indio_dev);
+
+ return lidar_write_power(data, 0x0f);
+}
+
+static int lidar_pm_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct lidar_data *data = iio_priv(indio_dev);
+ int ret = lidar_write_power(data, 0);
+
+ /* regulator and FPGA needs settling time */
+ usleep_range(15000, 20000);
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops lidar_pm_ops = {
+ SET_RUNTIME_PM_OPS(lidar_pm_runtime_suspend,
+ lidar_pm_runtime_resume, NULL)
+};
+
static struct i2c_driver lidar_driver = {
.driver = {
.name = LIDAR_DRV_NAME,
.of_match_table = of_match_ptr(lidar_dt_ids),
+ .pm = &lidar_pm_ops,
},
.probe = lidar_probe,
.remove = lidar_remove,
--
1.9.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v3 1/1] iio: pulsedlight-lidar-lite: add runtime PM
2015-11-08 6:10 ` Matt Ranostay
@ 2015-11-08 6:40 ` Krzysztof Kozlowski
-1 siblings, 0 replies; 6+ messages in thread
From: Krzysztof Kozlowski @ 2015-11-08 6:40 UTC (permalink / raw)
To: Matt Ranostay
Cc: jic23-DgEjT+Ai2ygdnm+yROfE0A, linux-iio-u79uwXL29TY76Z2rM5mHXA,
linux-pm-u79uwXL29TY76Z2rM5mHXA, Krzysztof Kozlowski
2015-11-08 15:10 GMT+09:00 Matt Ranostay <mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:
> Add runtime PM support for the lidar-lite module to enable low power
> mode when last device requested reading is over a second.
>
> Signed-off-by: Matt Ranostay <mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 53 ++++++++++++++++++++++-
> 1 file changed, 52 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
> index 961f9f99..768b944 100644
> --- a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
> +++ b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
> @@ -13,7 +13,7 @@
> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> * GNU General Public License for more details.
> *
> - * TODO: runtime pm, interrupt mode, and signal strength reporting
> + * TODO: interrupt mode, and signal strength reporting
> */
>
> #include <linux/err.h>
> @@ -21,6 +21,7 @@
> #include <linux/i2c.h>
> #include <linux/delay.h>
> #include <linux/module.h>
> +#include <linux/pm_runtime.h>
> #include <linux/iio/iio.h>
> #include <linux/iio/sysfs.h>
> #include <linux/iio/buffer.h>
> @@ -37,6 +38,7 @@
>
> #define LIDAR_REG_DATA_HBYTE 0x0f
> #define LIDAR_REG_DATA_LBYTE 0x10
> +#define LIDAR_REG_PWR_CONTROL 0x65
>
> #define LIDAR_DRV_NAME "lidar"
>
> @@ -90,6 +92,12 @@ static inline int lidar_write_control(struct lidar_data *data, int val)
> return i2c_smbus_write_byte_data(data->client, LIDAR_REG_CONTROL, val);
> }
>
> +static inline int lidar_write_power(struct lidar_data *data, int val)
> +{
> + return i2c_smbus_write_byte_data(data->client,
> + LIDAR_REG_PWR_CONTROL, val);
> +}
> +
> static int lidar_read_measurement(struct lidar_data *data, u16 *reg)
> {
> int ret;
> @@ -116,6 +124,8 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
> int tries = 10;
> int ret;
>
> + pm_runtime_get_sync(&client->dev);
> +
> /* start sample */
> ret = lidar_write_control(data, LIDAR_REG_CONTROL_ACQUIRE);
> if (ret < 0) {
> @@ -144,6 +154,7 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
> }
> ret = -EIO;
> }
> + pm_runtime_put_autosuspend(&client->dev);
Now you lost pm_runtime_mark_last_busy() which was present in last version.
Rest looks good.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3 1/1] iio: pulsedlight-lidar-lite: add runtime PM
@ 2015-11-08 6:40 ` Krzysztof Kozlowski
0 siblings, 0 replies; 6+ messages in thread
From: Krzysztof Kozlowski @ 2015-11-08 6:40 UTC (permalink / raw)
To: Matt Ranostay; +Cc: jic23, linux-iio, linux-pm, Krzysztof Kozlowski
2015-11-08 15:10 GMT+09:00 Matt Ranostay <mranostay@gmail.com>:
> Add runtime PM support for the lidar-lite module to enable low power
> mode when last device requested reading is over a second.
>
> Signed-off-by: Matt Ranostay <mranostay@gmail.com>
> ---
> drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 53 ++++++++++++++++++++++-
> 1 file changed, 52 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
> index 961f9f99..768b944 100644
> --- a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
> +++ b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
> @@ -13,7 +13,7 @@
> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> * GNU General Public License for more details.
> *
> - * TODO: runtime pm, interrupt mode, and signal strength reporting
> + * TODO: interrupt mode, and signal strength reporting
> */
>
> #include <linux/err.h>
> @@ -21,6 +21,7 @@
> #include <linux/i2c.h>
> #include <linux/delay.h>
> #include <linux/module.h>
> +#include <linux/pm_runtime.h>
> #include <linux/iio/iio.h>
> #include <linux/iio/sysfs.h>
> #include <linux/iio/buffer.h>
> @@ -37,6 +38,7 @@
>
> #define LIDAR_REG_DATA_HBYTE 0x0f
> #define LIDAR_REG_DATA_LBYTE 0x10
> +#define LIDAR_REG_PWR_CONTROL 0x65
>
> #define LIDAR_DRV_NAME "lidar"
>
> @@ -90,6 +92,12 @@ static inline int lidar_write_control(struct lidar_data *data, int val)
> return i2c_smbus_write_byte_data(data->client, LIDAR_REG_CONTROL, val);
> }
>
> +static inline int lidar_write_power(struct lidar_data *data, int val)
> +{
> + return i2c_smbus_write_byte_data(data->client,
> + LIDAR_REG_PWR_CONTROL, val);
> +}
> +
> static int lidar_read_measurement(struct lidar_data *data, u16 *reg)
> {
> int ret;
> @@ -116,6 +124,8 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
> int tries = 10;
> int ret;
>
> + pm_runtime_get_sync(&client->dev);
> +
> /* start sample */
> ret = lidar_write_control(data, LIDAR_REG_CONTROL_ACQUIRE);
> if (ret < 0) {
> @@ -144,6 +154,7 @@ static int lidar_get_measurement(struct lidar_data *data, u16 *reg)
> }
> ret = -EIO;
> }
> + pm_runtime_put_autosuspend(&client->dev);
Now you lost pm_runtime_mark_last_busy() which was present in last version.
Rest looks good.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-11-08 6:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2015-11-08 6:10 [PATCH v3 0/1] iio: pulsedlight-lidar-lite: add runtime PM Matt Ranostay
2015-11-08 6:10 ` Matt Ranostay
[not found] ` <1446963015-17828-1-git-send-email-mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-11-08 6:10 ` [PATCH v3 1/1] " Matt Ranostay
2015-11-08 6:10 ` Matt Ranostay
[not found] ` <1446963015-17828-2-git-send-email-mranostay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-11-08 6:40 ` Krzysztof Kozlowski
2015-11-08 6:40 ` Krzysztof Kozlowski
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