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authorCristian Marussi2021-03-16 12:48:34 +0000
committerSudeep Holla2021-03-29 10:00:35 +0100
commit3d5d6e84ea0e9cf985b1d0d8d359fe693f2466e4 (patch)
treeb56fb1d1908ea313f6223424fd40effc3714d5f3 /drivers/firmware
parenta4a20b0975dc7b137e5de4b73f23579fccd57cf9 (diff)
firmware: arm_scmi: Add helper to access protocol revision/version
Add an helper to access from a protocol handle, the SCMI version data which is exposed on sysfs. Such helper will be needed by SCMI base protocol initialization once it will be moved to new protocol handles scheme. Link: https://lore.kernel.org/r/20210316124903.35011-10-cristian.marussi@arm.com Tested-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/arm_scmi/common.h2
-rw-r--r--drivers/firmware/arm_scmi/driver.c19
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index 10e24ad43f0f..6a06adc73f20 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -215,6 +215,8 @@ struct scmi_xfer_ops {
struct scmi_xfer *xfer);
};
+struct scmi_revision_info *
+scmi_revision_area_get(const struct scmi_protocol_handle *ph);
int scmi_handle_put(const struct scmi_handle *handle);
struct scmi_handle *scmi_handle_get(struct device *dev);
void scmi_set_handle(struct scmi_device *scmi_dev);
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 8db450a0c294..fa83e1aec6d7 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -699,6 +699,25 @@ static const struct scmi_xfer_ops xfer_ops = {
};
/**
+ * scmi_revision_area_get - Retrieve version memory area.
+ *
+ * @ph: A reference to the protocol handle.
+ *
+ * A helper to grab the version memory area reference during SCMI Base protocol
+ * initialization.
+ *
+ * Return: A reference to the version memory area associated to the SCMI
+ * instance underlying this protocol handle.
+ */
+struct scmi_revision_info *
+scmi_revision_area_get(const struct scmi_protocol_handle *ph)
+{
+ const struct scmi_protocol_instance *pi = ph_to_pi(ph);
+
+ return pi->handle->version;
+}
+
+/**
* scmi_alloc_init_protocol_instance - Allocate and initialize a protocol
* instance descriptor.
* @info: The reference to the related SCMI instance.