2015-11-08 15:10 GMT+09:00 Matt Ranostay <mranostay@xxxxxxxxx>:
> 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@xxxxxxxxx>
> ---
> 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
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