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firmware: arm_scpi: add support for 64-bit sensor values

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SCPI specification version 1.1 extended the sensor from 32-bit to 64-bit
values in order to accommodate new sensor class with 64-bit requirements

Since the SCPI driver sets the higher 32-bit for older protocol version
to zeros, there's no need to explicitly check the SCPI protocol version
and the backward compatibility is maintainted.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla
2016-01-14 17:58:02 +00:00
parent 3bdd884371
commit 2e8741599c
3 changed files with 9 additions and 7 deletions
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8
drivers/firmware/arm_scpi.c
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@@ -231,7 +231,8 @@ struct _scpi_sensor_info {
};
struct sensor_value {
__le32 val;
__le32 lo_val;
__le32 hi_val;
} __packed;
static struct scpi_drvinfo *scpi_info;
@@ -525,7 +526,7 @@ static int scpi_sensor_get_info(u16 sensor_id, struct scpi_sensor_info *info)
return ret;
}
int scpi_sensor_get_value(u16 sensor, u32 *val)
int scpi_sensor_get_value(u16 sensor, u64 *val)
{
__le16 id = cpu_to_le16(sensor);
struct sensor_value buf;
@@ -534,7 +535,8 @@ int scpi_sensor_get_value(u16 sensor, u32 *val)
ret = scpi_send_message(SCPI_CMD_SENSOR_VALUE, &id, sizeof(id),
&buf, sizeof(buf));
if (!ret)
*val = le32_to_cpu(buf.val);
*val = (u64)le32_to_cpu(buf.hi_val) << 32 |
le32_to_cpu(buf.lo_val);
return ret;
}