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authorSudeep Holla <sudeep.holla@arm.com>2016-01-14 17:58:02 +0000
committerSudeep Holla <sudeep.holla@arm.com>2016-02-16 09:26:27 +0000
commit2e8741599cf128ea27674d9ae93b46e847f820b4 (patch)
treec5d67204b4ec905d85667bb67bc4f776f830327c /drivers/firmware/arm_scpi.c
parent3bdd884371b6fe68bb144aa4661d6a774a5417f1 (diff)
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/arm_scpi.c')
-rw-r--r--drivers/firmware/arm_scpi.c8
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;
}