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| author | Sudeep Holla <sudeep.holla@arm.com> | 2016-01-14 17:58:02 +0000 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2016-02-16 09:26:27 +0000 |
| commit | 2e8741599cf128ea27674d9ae93b46e847f820b4 (patch) | |
| tree | c5d67204b4ec905d85667bb67bc4f776f830327c /drivers/firmware | |
| parent | 3bdd884371b6fe68bb144aa4661d6a774a5417f1 (diff) | |
| download | linux-2e8741599cf128ea27674d9ae93b46e847f820b4.tar.gz linux-2e8741599cf128ea27674d9ae93b46e847f820b4.tar.bz2 linux-2e8741599cf128ea27674d9ae93b46e847f820b4.zip | |
firmware: arm_scpi: add support for 64-bit sensor values
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>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scpi.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index c32ac6e61ba2..7e3e595c9f30 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -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; } |