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clk: scmi: Use new determine_rate clock operation

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Use the Clock protocol layer determine_rate logic to calculate the closest
rate that can be supported by a specific clock.

No functional change.

Cc: Brian Masney <bmasney@redhat.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk@vger.kernel.org
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260508153300.2224715-4-cristian.marussi@arm.com
Reviewed-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
This commit is contained in:
Cristian Marussi 2026-05-08 16:32:48 +01:00 committed by Sudeep Holla
parent ecde921eb4
commit af86c99170
1 changed files with 6 additions and 25 deletions
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31
drivers/clk/clk-scmi.c
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@ -10,7 +10,6 @@
#include <linux/device.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/scmi_protocol.h>
@ -57,35 +56,17 @@ static unsigned long scmi_clk_recalc_rate(struct clk_hw *hw,
static int scmi_clk_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
u64 fmin, fmax, ftmp;
int ret;
struct scmi_clk *clk = to_scmi_clk(hw);
/*
* We can't figure out what rate it will be, so just return the
* rate back to the caller. scmi_clk_recalc_rate() will be called
* after the rate is set and we'll know what rate the clock is
* If we could not get a better rate scmi_clk_recalc_rate() will be
* called after the rate is set and we'll know what rate the clock is
* running at then.
*/
if (clk->info->rate_discrete)
return 0;
fmin = clk->info->range.min_rate;
fmax = clk->info->range.max_rate;
if (req->rate <= fmin) {
req->rate = fmin;
return 0;
} else if (req->rate >= fmax) {
req->rate = fmax;
return 0;
}
ftmp = req->rate - fmin;
ftmp += clk->info->range.step_size - 1; /* to round up */
ftmp = div64_ul(ftmp, clk->info->range.step_size);
req->rate = ftmp * clk->info->range.step_size + fmin;
ret = scmi_proto_clk_ops->determine_rate(clk->ph, clk->id, &req->rate);
if (ret)
return ret;
return 0;
}