diff options
| author | Pierre Gondois <pierre.gondois@arm.com> | 2024-02-22 14:57:00 +0100 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2024-03-06 10:54:21 +0530 |
| commit | 2441caa84aac8abf1be9e20db3e6bb921e74c8a2 (patch) | |
| tree | b4f817ad2b7898f091de8b37513d9482486c405d /drivers/firmware/arm_scmi/driver.c | |
| parent | ad86f7e959dc1814c3b2bcbeb08c3c02214110a7 (diff) | |
firmware: arm_scmi: Populate fast channel rate_limit
Arm SCMI spec. v3.2, s4.5.3.12 PERFORMANCE_DESCRIBE_FASTCHANNEL
defines a per-domain rate_limit for performance requests:
"""
Rate Limit in microseconds, indicating the minimum time
required between successive requests. A value of 0
indicates that this field is not applicable or supported
on the platform.
""""
The field is first defined in SCMI v2.0.
Add support to fetch this value and advertise it through
a fast_switch_rate_limit() callback.
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/firmware/arm_scmi/driver.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 3ea64b22cf0d..1d38ecfafc59 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1617,7 +1617,7 @@ static void scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph, u8 describe_id, u32 message_id, u32 valid_size, u32 domain, void __iomem **p_addr, - struct scmi_fc_db_info **p_db) + struct scmi_fc_db_info **p_db, u32 *rate_limit) { int ret; u32 flags; @@ -1661,6 +1661,9 @@ scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph, goto err_xfer; } + if (rate_limit) + *rate_limit = le32_to_cpu(resp->rate_limit) & GENMASK(19, 0); + phys_addr = le32_to_cpu(resp->chan_addr_low); phys_addr |= (u64)le32_to_cpu(resp->chan_addr_high) << 32; addr = devm_ioremap(ph->dev, phys_addr, size); |