clk: Fix invalid execution of clk_set_rate

Commit Message

Chuan Liu via B4 Relay Sept. 10, 2024, 5:53 a.m. UTC

From: Chuan Liu <[e-mail]>

Some clocks have rates that can be changed elsewhere, so add a flag
CLK_GET_RATE_NOCACHE(such as scmi_clk) to these clocks to ensure that
the real-time rate is obtained.

When clk_set_rate is called, it is returned if the request to set rate
is consistent with the current rate. Getting the current rate in
clk_set_rate returns the rate stored in clk_core. CLK_GET_RATE_NOCACHE
does not take effect here.

Signed-off-by: Chuan Liu <[e-mail]>
---
Some clocks have rates that can be changed elsewhere, so add a flag
CLK_GET_RATE_NOCACHE(such as scmi_clk) to these clocks to ensure that
the real-time rate is obtained.

When clk_set_rate is called, it is returned if the request to set rate
is consistent with the current rate. Getting the current rate in
clk_set_rate returns the rate stored in clk_core. CLK_GET_RATE_NOCACHE
does not take effect here.
---
 drivers/clk/clk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


---
base-commit: 2cd6543d82b9dc7b971b9b64f22ad34a1cae3076
change-id: 20240910-fix_clk-71bcd20bd33f

Best regards,

Patch

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 285ed1ad8a37..79b453b82528 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2536,7 +2536,7 @@  static int clk_core_set_rate_nolock(struct clk_core *core,
 	rate = clk_core_req_round_rate_nolock(core, req_rate);
 
 	/* bail early if nothing to do */
-	if (rate == clk_core_get_rate_nolock(core))
+	if (rate == clk_core_get_rate_recalc(core))
 		return 0;
 
 	/* fail on a direct rate set of a protected provider */