clk: Fix invalid execution of clk_set_rate

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 <chuan.liu@amlogic.com>
Link: https://lore.kernel.org/r/20240910-fix_clk-v1-1-111443baaeaa@amlogic.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 9b45fa005030f56e1478b9742715ebcde898133f..bdc6e5b90da581b3b9cbedcde3366c880a7dfd92 100644 (file)
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2530,7 +2530,7 @@ 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 */