platform/chrome: wilco_ec: Add version sysfs entries (79e3f1d3) · Commits · 戴 / test

Documentation/ABI/testing/sysfs-platform-wilco-ec

+31 −0

Original line number	Diff line number	Diff line
		@@ -7,3 +7,34 @@ Description:
		want to run their device headless or with a dock.

		Input should be parseable by kstrtou8() to 0 or 1.

		What: /sys/bus/platform/devices/GOOG000C\:00/build_date
		Date: May 2019
		KernelVersion: 5.3
		Description:
		Display Wilco Embedded Controller firmware build date.
		Output will a MM/DD/YY string.

		What: /sys/bus/platform/devices/GOOG000C\:00/build_revision
		Date: May 2019
		KernelVersion: 5.3
		Description:
		Display Wilco Embedded Controller build revision.
		Output will a version string be similar to the example below:
		d2592cae0

		What: /sys/bus/platform/devices/GOOG000C\:00/model_number
		Date: May 2019
		KernelVersion: 5.3
		Description:
		Display Wilco Embedded Controller model number.
		Output will a version string be similar to the example below:
		08B6

		What: /sys/bus/platform/devices/GOOG000C\:00/version
		Date: May 2019
		KernelVersion: 5.3
		Description:
		Display Wilco Embedded Controller firmware version.
		The format of the string is x.y.z. Where x is major, y is minor
		and z is the build number. For example: 95.00.06

drivers/platform/chrome/wilco_ec/sysfs.c

+79 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,25 @@ struct boot_on_ac_request {
		u8 reserved7;
		} __packed;

		#define CMD_EC_INFO 0x38
		enum get_ec_info_op {
		CMD_GET_EC_LABEL = 0,
		CMD_GET_EC_REV = 1,
		CMD_GET_EC_MODEL = 2,
		CMD_GET_EC_BUILD_DATE = 3,
		};

		struct get_ec_info_req {
		u8 cmd; /* Always CMD_EC_INFO */
		u8 reserved;
		u8 op; /* One of enum get_ec_info_op */
		} __packed;

		struct get_ec_info_resp {
		u8 reserved[2];
		char value[9]; /* __nonstring: might not be null terminated */
		} __packed;

		static ssize_t boot_on_ac_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t count)
		@@ -57,8 +76,68 @@ static ssize_t boot_on_ac_store(struct device *dev,

		static DEVICE_ATTR_WO(boot_on_ac);

		static ssize_t get_info(struct device dev, char buf, enum get_ec_info_op op)
		{
		struct wilco_ec_device *ec = dev_get_drvdata(dev);
		struct get_ec_info_req req = { .cmd = CMD_EC_INFO, .op = op };
		struct get_ec_info_resp resp;
		int ret;

		struct wilco_ec_message msg = {
		.type = WILCO_EC_MSG_LEGACY,
		.request_data = &req,
		.request_size = sizeof(req),
		.response_data = &resp,
		.response_size = sizeof(resp),
		};

		ret = wilco_ec_mailbox(ec, &msg);
		if (ret < 0)
		return ret;

		return scnprintf(buf, PAGE_SIZE, "%.*s\n", (int)sizeof(resp.value),
		(char *)&resp.value);
		}

		static ssize_t version_show(struct device dev, struct device_attribute attr,
		char *buf)
		{
		return get_info(dev, buf, CMD_GET_EC_LABEL);
		}

		static DEVICE_ATTR_RO(version);

		static ssize_t build_revision_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		return get_info(dev, buf, CMD_GET_EC_REV);
		}

		static DEVICE_ATTR_RO(build_revision);

		static ssize_t build_date_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		return get_info(dev, buf, CMD_GET_EC_BUILD_DATE);
		}

		static DEVICE_ATTR_RO(build_date);

		static ssize_t model_number_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		return get_info(dev, buf, CMD_GET_EC_MODEL);
		}

		static DEVICE_ATTR_RO(model_number);


		static struct attribute *wilco_dev_attrs[] = {
		&dev_attr_boot_on_ac.attr,
		&dev_attr_build_date.attr,
		&dev_attr_build_revision.attr,
		&dev_attr_model_number.attr,
		&dev_attr_version.attr,
		NULL,
		};

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