firmware: arm_scmi: Add SCMI v3.1 perf power-cost in microwatts

Add SCMI v3.1 internal support for parsing message attributes reporting
the capability of a performance domain to report power-cost in microwatts.

Link: https://lore.kernel.org/r/20220330150551.2573938-22-cristian.marussi@arm.com
Cc: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index e1aa0ed..65ffda5 100644 (file)
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -45,6 +45,7 @@ struct scmi_msg_resp_perf_attributes {
        __le16 num_domains;
        __le16 flags;
 #define POWER_SCALE_IN_MILLIWATT(x)    ((x) & BIT(0))
+#define POWER_SCALE_IN_MICROWATT(x)    ((x) & BIT(1))
        __le32 stats_addr_low;
        __le32 stats_addr_high;
        __le32 stats_size;
@@ -170,6 +171,7 @@ struct scmi_perf_info {
        u32 version;
        int num_domains;
        bool power_scale_mw;
+       bool power_scale_uw;
        u64 stats_addr;
        u32 stats_size;
        struct perf_dom_info *dom_info;
@@ -200,6 +202,8 @@ static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph,
 
                pi->num_domains = le16_to_cpu(attr->num_domains);
                pi->power_scale_mw = POWER_SCALE_IN_MILLIWATT(flags);
+               if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3)
+                       pi->power_scale_uw = POWER_SCALE_IN_MICROWATT(flags);
                pi->stats_addr = le32_to_cpu(attr->stats_addr_low) |
                                (u64)le32_to_cpu(attr->stats_addr_high) << 32;
                pi->stats_size = le32_to_cpu(attr->stats_size);