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Date:   Mon, 8 Jul 2019 09:05:20 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>,
        Jim Quinlan <james.quinlan@...adcom.com>,
        Bo Zhang <bozhang.zhang@...adcom.com>,
        Volodymyr Babchuk <volodymyr_babchuk@...m.com>,
        linux-hwmon@...r.kernel.org
Subject: Re: [PATCH 08/11] firmware: arm_scmi: Drop async flag in
 sensor_ops->reading_get

On Mon, Jul 08, 2019 at 04:47:27PM +0100, Sudeep Holla wrote:
> SENSOR_DESCRIPTION_GET provides attributes to indicate if the sensor
> supports asynchronous read. Ideally we should be able to read that flag
> and use asynchronous reads for any sensors with that attribute set.
> 
> In order to add that support, let's drop the async flag passed to
> sensor_ops->reading_get and dynamically switch between sync and async
> flags based on the attributes as provided by the firmware.
> 
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: linux-hwmon@...r.kernel.org
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>

For hwmon:

Acked-by: Guenter Roeck <linux@...ck-us.net>

Guenter

> ---
>  drivers/firmware/arm_scmi/sensors.c | 4 ++--
>  drivers/hwmon/scmi-hwmon.c          | 2 +-
>  include/linux/scmi_protocol.h       | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c
> index 17dbabd8a94a..1b5757c77a35 100644
> --- a/drivers/firmware/arm_scmi/sensors.c
> +++ b/drivers/firmware/arm_scmi/sensors.c
> @@ -211,7 +211,7 @@ scmi_sensor_trip_point_config(const struct scmi_handle *handle, u32 sensor_id,
>  }
>  
>  static int scmi_sensor_reading_get(const struct scmi_handle *handle,
> -				   u32 sensor_id, bool async, u64 *value)
> +				   u32 sensor_id, u64 *value)
>  {
>  	int ret;
>  	struct scmi_xfer *t;
> @@ -225,7 +225,7 @@ static int scmi_sensor_reading_get(const struct scmi_handle *handle,
>  
>  	sensor = t->tx.buf;
>  	sensor->id = cpu_to_le32(sensor_id);
> -	sensor->flags = cpu_to_le32(async ? SENSOR_READ_ASYNC : 0);
> +	sensor->flags = cpu_to_le32(0);
>  
>  	ret = scmi_do_xfer(handle, t);
>  	if (!ret) {
> diff --git a/drivers/hwmon/scmi-hwmon.c b/drivers/hwmon/scmi-hwmon.c
> index 0c93fc5ca762..8a7732c0bef3 100644
> --- a/drivers/hwmon/scmi-hwmon.c
> +++ b/drivers/hwmon/scmi-hwmon.c
> @@ -72,7 +72,7 @@ static int scmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
>  	const struct scmi_handle *h = scmi_sensors->handle;
>  
>  	sensor = *(scmi_sensors->info[type] + channel);
> -	ret = h->sensor_ops->reading_get(h, sensor->id, false, &value);
> +	ret = h->sensor_ops->reading_get(h, sensor->id, &value);
>  	if (ret)
>  		return ret;
>  
> diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
> index ea6b72018752..697e30fb9004 100644
> --- a/include/linux/scmi_protocol.h
> +++ b/include/linux/scmi_protocol.h
> @@ -182,7 +182,7 @@ struct scmi_sensor_ops {
>  	int (*trip_point_config)(const struct scmi_handle *handle,
>  				 u32 sensor_id, u8 trip_id, u64 trip_value);
>  	int (*reading_get)(const struct scmi_handle *handle, u32 sensor_id,
> -			   bool async, u64 *value);
> +			   u64 *value);
>  };
>  
>  /**
> -- 
> 2.17.1
> 

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