The CPU rate from clk_get_rate() may not be divisible by 1000
(e.g., 133333333). But the rate calculated from frequency(kHz) is
always divisible by 1000 (e.g., 133333000).
Comparing the rate causes a warning during CPU scaling:
"cpufreq: __target_index: Failed to change cpu frequency: -5".
When we choose to compare kHz here, the issue does not occur.

Fixes: 343a8d17fa8d ("cpufreq: scpi: remove arm_big_little dependency")
Signed-off-by: zuoqian <zuoqian113@gmail.com>
---
V1 -> V2: rename freq to freq_khz, change rate to unsigned long, and
update patch summary.
---
 drivers/cpufreq/scpi-cpufreq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
index cd89c1b9832c..9e09565e41c0 100644
--- a/drivers/cpufreq/scpi-cpufreq.c
+++ b/drivers/cpufreq/scpi-cpufreq.c
@@ -39,8 +39,9 @@ static unsigned int scpi_cpufreq_get_rate(unsigned int cpu)
 static int
 scpi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
-	u64 rate = policy->freq_table[index].frequency * 1000;
+	unsigned long freq_khz = policy->freq_table[index].frequency;
 	struct scpi_data *priv = policy->driver_data;
+	unsigned long rate = freq_khz * 1000;
 	int ret;
 
 	ret = clk_set_rate(priv->clk, rate);
@@ -48,7 +49,7 @@ scpi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
 	if (ret)
 		return ret;
 
-	if (clk_get_rate(priv->clk) != rate)
+	if (clk_get_rate(priv->clk) / 1000 != freq_khz)
 		return -EIO;
 
 	return 0;
-- 
2.43.0

On Sat, Jan 25, 2025 at 08:49:49AM +0000, zuoqian wrote:
> The CPU rate from clk_get_rate() may not be divisible by 1000
> (e.g., 133333333). But the rate calculated from frequency(kHz) is
> always divisible by 1000 (e.g., 133333000).
> Comparing the rate causes a warning during CPU scaling:
> "cpufreq: __target_index: Failed to change cpu frequency: -5".
> When we choose to compare kHz here, the issue does not occur.
> 
> Fixes: 343a8d17fa8d ("cpufreq: scpi: remove arm_big_little dependency")
> Signed-off-by: zuoqian <zuoqian113@gmail.com>
> ---
> V1 -> V2: rename freq to freq_khz, change rate to unsigned long, and
> update patch summary.

Thanks!

Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>

regards,
dan carpenter

On Sat, Jan 25, 2025 at 08:49:49AM +0000, zuoqian wrote:
> The CPU rate from clk_get_rate() may not be divisible by 1000
> (e.g., 133333333). But the rate calculated from frequency(kHz) is
> always divisible by 1000 (e.g., 133333000).
> Comparing the rate causes a warning during CPU scaling:
> "cpufreq: __target_index: Failed to change cpu frequency: -5".
> When we choose to compare kHz here, the issue does not occur.
> 
> Fixes: 343a8d17fa8d ("cpufreq: scpi: remove arm_big_little dependency")
> Signed-off-by: zuoqian <zuoqian113@gmail.com>
> ---
> V1 -> V2: rename freq to freq_khz, change rate to unsigned long, and
> update patch summary.

Thanks!

Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>

regards,
dan carpenter

On 25-01-25, 16:04, Dan Carpenter wrote:
> On Sat, Jan 25, 2025 at 08:49:49AM +0000, zuoqian wrote:
> > The CPU rate from clk_get_rate() may not be divisible by 1000
> > (e.g., 133333333). But the rate calculated from frequency(kHz) is
> > always divisible by 1000 (e.g., 133333000).
> > Comparing the rate causes a warning during CPU scaling:
> > "cpufreq: __target_index: Failed to change cpu frequency: -5".
> > When we choose to compare kHz here, the issue does not occur.
> > 
> > Fixes: 343a8d17fa8d ("cpufreq: scpi: remove arm_big_little dependency")
> > Signed-off-by: zuoqian <zuoqian113@gmail.com>
> > ---
> > V1 -> V2: rename freq to freq_khz, change rate to unsigned long, and
> > update patch summary.
> 
> Thanks!
> 
> Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>

Applied. Thanks.

-- 
viresh