diff mbox series

[v2,04/11] firmware: arm_scmi: Add versions and identifier attributes using dev_groups

Message ID 20191218111742.29731-5-sudeep.holla@arm.com (mailing list archive)
State Mainlined
Commit 4605e224db2ec4ce8f0eb4e91feba7eaf5677ba9
Headers show
Series firmware: arm_scmi: Add support for multiple device per protocol | expand

Commit Message

Sudeep Holla Dec. 18, 2019, 11:17 a.m. UTC 
Platform drivers now have the option to have the platform core create
and remove any needed sysfs attribute files. Using the same, let's add
the scmi firmware and protocol version attributes as well as vendor and
sub-vendor identifiers to sysfs.

It helps to identify the firmware details from the sysfs entries similar
to ARM SCPI implementation.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/firmware/arm_scmi/driver.c | 47 ++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
diff mbox series

Patch

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 0bbdc7c9eb0f..26b2c438bd59 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -979,6 +979,52 @@  static int scmi_remove(struct platform_device *pdev)
 	return ret;
 }
 
+static ssize_t protocol_version_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct scmi_info *info = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%u.%u\n", info->version.major_ver,
+		       info->version.minor_ver);
+}
+static DEVICE_ATTR_RO(protocol_version);
+
+static ssize_t firmware_version_show(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct scmi_info *info = dev_get_drvdata(dev);
+
+	return sprintf(buf, "0x%x\n", info->version.impl_ver);
+}
+static DEVICE_ATTR_RO(firmware_version);
+
+static ssize_t vendor_id_show(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct scmi_info *info = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%s\n", info->version.vendor_id);
+}
+static DEVICE_ATTR_RO(vendor_id);
+
+static ssize_t sub_vendor_id_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct scmi_info *info = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%s\n", info->version.sub_vendor_id);
+}
+static DEVICE_ATTR_RO(sub_vendor_id);
+
+static struct attribute *versions_attrs[] = {
+	&dev_attr_firmware_version.attr,
+	&dev_attr_protocol_version.attr,
+	&dev_attr_vendor_id.attr,
+	&dev_attr_sub_vendor_id.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(versions);
+
 static const struct scmi_desc scmi_generic_desc = {
 	.max_rx_timeout_ms = 30,	/* We may increase this if required */
 	.max_msg = 20,		/* Limited by MBOX_TX_QUEUE_LEN */
@@ -997,6 +1043,7 @@  static struct platform_driver scmi_driver = {
 	.driver = {
 		   .name = "arm-scmi",
 		   .of_match_table = scmi_of_match,
+		   .dev_groups = versions_groups,
 		   },
 	.probe = scmi_probe,
 	.remove = scmi_remove,