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clk: scmi: manage properly the clk identifier with CCF

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Each clock identifier needs to be unique when CCF is activated,
and it is not respected today by SCMI clock driver.

This patch supports a unique clk id by using the uclass API
clk_get_id() / dev_clk_dm() and by activating by default
CONFIG_CLK_AUTO_ID with CCF which adds an offset to the SCMI
clock identifiers.

After this patch, the SCMI clock driver can coexist with other
clock provider without conflict, they can share internal identifier
[0..N] defined in their binding and the clock ID = 0
(reserved for dummy clock) is no more used.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Lukasz Majewski <lukma@denx.de>
Cc: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2025-05-27 15:27:50 +02:00 committed by Patrice Chotard
parent 64b07829f7
commit aa7bdc1af5
2 changed files with 5 additions and 4 deletions
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1
drivers/clk/Kconfig
View File

@ -192,6 +192,7 @@ config CLK_SCMI
bool "Enable SCMI clock driver"
depends on CLK
depends on SCMI_FIRMWARE
select CLK_AUTO_ID if CLK_CCF
help
Enable this option if you want to support clock devices exposed
by a SCMI agent based on SCMI clock protocol communication

8
drivers/clk/clk_scmi.c
View File

@ -132,7 +132,7 @@ static int scmi_clk_get_attibute(struct udevice *dev, int clkid, char **name,
static int scmi_clk_gate(struct clk *clk, int enable)
{
struct scmi_clk_state_in in = {
.clock_id = clk->id,
.clock_id = clk_get_id(clk),
.attributes = enable,
};
struct scmi_clk_state_out out;
@ -197,7 +197,7 @@ static int scmi_clk_disable(struct clk *clk)
static ulong scmi_clk_get_rate(struct clk *clk)
{
struct scmi_clk_rate_get_in in = {
.clock_id = clk->id,
.clock_id = clk_get_id(clk),
};
struct scmi_clk_rate_get_out out;
struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_CLOCK,
@ -219,7 +219,7 @@ static ulong scmi_clk_get_rate(struct clk *clk)
static ulong __scmi_clk_set_rate(struct clk *clk, ulong rate)
{
struct scmi_clk_rate_set_in in = {
.clock_id = clk->id,
.clock_id = clk_get_id(clk),
.flags = SCMI_CLK_RATE_ROUND_CLOSEST,
.rate_lsb = (u32)rate,
.rate_msb = (u32)((u64)rate >> 32),
@ -313,7 +313,7 @@ static int scmi_clk_probe(struct udevice *dev)
return ret;
}
clk_dm(i, &clk_scmi->clk);
dev_clk_dm(dev, i, &clk_scmi->clk);
if (CLK_HAS_RESTRICTIONS(attributes)) {
u32 perm;