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firmware: arm_scmi: Add atomic support to clock protocol 

Introduce new _atomic variant for SCMI clock protocol operations related
to enable disable operations: when an atomic operation is required the xfer
poll_completion flag is set for that transaction.

Link: https://lore.kernel.org/r/20220217131234.50328-7-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Cristian Marussi 2022-02-17 13:12:32 +00:00 committed by Sudeep Holla
parent 05976c5f3b
commit b7bd36f2e9
2 changed files with 22 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/firmware/arm_scmi/clock.c
View File

@ -273,7 +273,7 @@ static int scmi_clock_rate_set(const struct scmi_protocol_handle *ph,
static int
scmi_clock_config_set(const struct scmi_protocol_handle *ph, u32 clk_id,
u32 config)
u32 config, bool atomic)
{
int ret;
struct scmi_xfer *t;
@ -284,6 +284,8 @@ scmi_clock_config_set(const struct scmi_protocol_handle *ph, u32 clk_id,
if (ret)
return ret;
t->hdr.poll_completion = atomic;
cfg = t->tx.buf;
cfg->id = cpu_to_le32(clk_id);
cfg->attributes = cpu_to_le32(config);
@ -296,12 +298,24 @@ scmi_clock_config_set(const struct scmi_protocol_handle *ph, u32 clk_id,
static int scmi_clock_enable(const struct scmi_protocol_handle *ph, u32 clk_id)
{
return scmi_clock_config_set(ph, clk_id, CLOCK_ENABLE);
return scmi_clock_config_set(ph, clk_id, CLOCK_ENABLE, false);
}
static int scmi_clock_disable(const struct scmi_protocol_handle *ph, u32 clk_id)
{
return scmi_clock_config_set(ph, clk_id, 0);
return scmi_clock_config_set(ph, clk_id, 0, false);
}
static int scmi_clock_enable_atomic(const struct scmi_protocol_handle *ph,
u32 clk_id)
{
return scmi_clock_config_set(ph, clk_id, CLOCK_ENABLE, true);
}
static int scmi_clock_disable_atomic(const struct scmi_protocol_handle *ph,
u32 clk_id)
{
return scmi_clock_config_set(ph, clk_id, 0, true);
}
static int scmi_clock_count_get(const struct scmi_protocol_handle *ph)
@ -330,6 +344,8 @@ static const struct scmi_clk_proto_ops clk_proto_ops = {
.rate_set = scmi_clock_rate_set,
.enable = scmi_clock_enable,
.disable = scmi_clock_disable,
.enable_atomic = scmi_clock_enable_atomic,
.disable_atomic = scmi_clock_disable_atomic,
};
static int scmi_clock_protocol_init(const struct scmi_protocol_handle *ph)

3
include/linux/scmi_protocol.h
View File

@ -82,6 +82,9 @@ struct scmi_clk_proto_ops {
u64 rate);
int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id);
int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id);
int (*enable_atomic)(const struct scmi_protocol_handle *ph, u32 clk_id);
int (*disable_atomic)(const struct scmi_protocol_handle *ph,
u32 clk_id);
};
/**