@@ -27,7 +27,8 @@ struct scmi_msg_resp_clock_protocol_attributes {
struct scmi_msg_resp_clock_attributes {
__le32 attributes;
#define CLOCK_ENABLE BIT(0)
- u8 name[SCMI_MAX_STR_SIZE];
+ u8 name[SCMI_MAX_STR_SIZE];
+ __le32 clock_enable_latency;
};
struct scmi_clock_set_config {
@@ -116,10 +117,15 @@ static int scmi_clock_attributes_get(const struct scmi_protocol_handle *ph,
attr = t->rx.buf;
ret = ph->xops->do_xfer(ph, t);
- if (!ret)
+ if (!ret) {
strlcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE);
- else
+ /* TODO Use CLOCK Proto Versioning once SCMI spec is updated */
+ if (t->rx.len > sizeof(attr->attributes) + SCMI_MAX_STR_SIZE)
+ clk->enable_latency =
+ le32_to_cpu(attr->clock_enable_latency);
+ } else {
clk->name[0] = '\0';
+ }
ph->xops->xfer_put(ph, t);
return ret;
@@ -42,6 +42,7 @@ struct scmi_revision_info {
struct scmi_clock_info {
char name[SCMI_MAX_STR_SIZE];
+ unsigned int enable_latency;
bool rate_discrete;
union {
struct {
An SCMI platform can optionally advertise an enable latency typically associated with a specific clock resource: add support for parsing such optional message field and export such information in the usual publicly accessible clock descriptor. Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- RFC tag is due to the fact that this SCMI spec Clock protocol field addition is still to be published. v1 --> v2 - moved enable_latency flag definition from the previous commit --- drivers/firmware/arm_scmi/clock.c | 12 +++++++++--- include/linux/scmi_protocol.h | 1 + 2 files changed, 10 insertions(+), 3 deletions(-)