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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>

Author: Chuan Liu

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 */