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authorCristian Marussi <cristian.marussi@arm.com>2022-02-17 16:12:33 +0300
committerSudeep Holla <sudeep.holla@arm.com>2022-02-21 13:36:48 +0300
commit18f295b758b227857133f680a397a42e83c62f3f (patch)
tree8c96238bd48578c97c080c4eddcf82f146e8a6cb /drivers/firmware/arm_scmi
parentb7bd36f2e9430a58aefdc326f8e6653e9b000243 (diff)
downloadlinux-18f295b758b227857133f680a397a42e83c62f3f.tar.xz
firmware: arm_scmi: Add support for clock_enable_latency
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. Link: https://lore.kernel.org/r/20220217131234.50328-8-cristian.marussi@arm.com Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi')
-rw-r--r--drivers/firmware/arm_scmi/clock.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
index 72f930c0e3e2..cf6fed6dec77 100644
--- a/drivers/firmware/arm_scmi/clock.c
+++ b/drivers/firmware/arm_scmi/clock.c
@@ -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
+ /* Is optional field clock_enable_latency provided ? */
+ if (t->rx.len == sizeof(*attr))
+ clk->enable_latency =
+ le32_to_cpu(attr->clock_enable_latency);
+ } else {
clk->name[0] = '\0';
+ }
ph->xops->xfer_put(ph, t);
return ret;