From 18f295b758b227857133f680a397a42e83c62f3f Mon Sep 17 00:00:00 2001 From: Cristian Marussi Date: Thu, 17 Feb 2022 13:12:33 +0000 Subject: 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 Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/clock.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'drivers/firmware') 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; -- cgit v1.2.3