From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754389AbcBIOdK (ORCPT ); Tue, 9 Feb 2016 09:33:10 -0500 Received: from foss.arm.com ([217.140.101.70]:40633 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751861AbcBIOdJ (ORCPT ); Tue, 9 Feb 2016 09:33:09 -0500 From: Sudeep Holla To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Guenter Roeck Cc: Sudeep Holla , lm-sensors@lm-sensors.org, Jean Delvare , Punit Agrawal Subject: [PATCH 1/2] firmware: arm_scpi: add support for 64-bit sensor values Date: Tue, 9 Feb 2016 14:32:56 +0000 Message-Id: <1455028377-12728-1-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Cc: Punit Agrawal Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scpi.c | 8 +++++--- drivers/hwmon/scpi-hwmon.c | 6 +++--- include/linux/scpi_protocol.h | 2 +- 3 files changed, 9 insertions(+), 7 deletions(-) Hi Guenter, Since I have couple of other fixes for SCPI driver, if you can provide your ACKs to this couple of patches after your review, I can take all of them together via ARM-SoC if that's fine with you. Regards, Sudeep 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; } diff --git a/drivers/hwmon/scpi-hwmon.c b/drivers/hwmon/scpi-hwmon.c index 7e20567bc369..7101b14b5137 100644 --- a/drivers/hwmon/scpi-hwmon.c +++ b/drivers/hwmon/scpi-hwmon.c @@ -52,7 +52,7 @@ static int scpi_read_temp(void *dev, int *temp) struct scpi_sensors *scpi_sensors = zone->scpi_sensors; struct scpi_ops *scpi_ops = scpi_sensors->scpi_ops; struct sensor_data *sensor = &scpi_sensors->data[zone->sensor_id]; - u32 value; + u64 value; int ret; ret = scpi_ops->sensor_get_value(sensor->info.sensor_id, &value); @@ -70,7 +70,7 @@ scpi_show_sensor(struct device *dev, struct device_attribute *attr, char *buf) struct scpi_sensors *scpi_sensors = dev_get_drvdata(dev); struct scpi_ops *scpi_ops = scpi_sensors->scpi_ops; struct sensor_data *sensor; - u32 value; + u64 value; int ret; sensor = container_of(attr, struct sensor_data, dev_attr_input); @@ -79,7 +79,7 @@ scpi_show_sensor(struct device *dev, struct device_attribute *attr, char *buf) if (ret) return ret; - return sprintf(buf, "%u\n", value); + return sprintf(buf, "%llu\n", value); } static ssize_t diff --git a/include/linux/scpi_protocol.h b/include/linux/scpi_protocol.h index 72ce932c69b2..ecd248d46281 100644 --- a/include/linux/scpi_protocol.h +++ b/include/linux/scpi_protocol.h @@ -68,7 +68,7 @@ struct scpi_ops { struct scpi_dvfs_info *(*dvfs_get_info)(u8); int (*sensor_get_capability)(u16 *sensors); int (*sensor_get_info)(u16 sensor_id, struct scpi_sensor_info *); - int (*sensor_get_value)(u16, u32 *); + int (*sensor_get_value)(u16, u64 *); }; #if IS_REACHABLE(CONFIG_ARM_SCPI_PROTOCOL) -- 1.9.1