[PATCH] cpufreq-dt: add suspend frequency support

[Bartlomiej Zolnierkiewicz]

Add suspend frequency support and set it to the boot frequency,
this matches what the old exynos-cpufreq driver has been doing.

This patch fixes suspend/resume support on Exynos4412 based
Trats2 board and reboot hang on Exynos4412 based Odroid U3
board.

Cc: Viresh Kumar 
Cc: Thomas Abraham 
Cc: Javier Martinez Canillas 
Cc: Krzysztof Kozlowski 
Cc: Marek Szyprowski 
Cc: Tobias Jakobi 
Signed-off-by: Bartlomiej Zolnierkiewicz 
---
This patch supersedes "[PATCH] ARM: dts: exynos4412-odroid-*: add
workaround for CPUfreq/reboot issue" one from yesterday.

 drivers/cpufreq/cpufreq-dt.c | 7 +++
 1 file changed, 7 insertions(+)

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index c3583cd..c9138c7 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -329,6 +329,10 @@ static int cpufreq_init(struct cpufreq_policy *policy)
policy->driver_data = priv;
 
policy->clk = cpu_clk;
+
+   /* capture boot frequency */
+   policy->suspend_freq = clk_get_rate(cpu_clk) / 1000;;
+
ret = cpufreq_table_validate_and_show(policy, freq_table);
if (ret) {
dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__,
@@ -419,6 +423,9 @@ static struct cpufreq_driver dt_cpufreq_driver = {
.ready = cpufreq_ready,
.name = "cpufreq-dt",
.attr = cpufreq_dt_attr,
+#ifdef CONFIG_PM
+   .suspend = cpufreq_generic_suspend,
+#endif
 };
 
 static int dt_cpufreq_probe(struct platform_device *pdev)
-- 
1.9.1

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Re: [PATCH] cpufreq-dt: add suspend frequency support

[Viresh Kumar]

On 02-09-15, 18:42, Bartlomiej Zolnierkiewicz wrote:
> Add suspend frequency support and set it to the boot frequency,
> this matches what the old exynos-cpufreq driver has been doing.
> 
> This patch fixes suspend/resume support on Exynos4412 based
> Trats2 board and reboot hang on Exynos4412 based Odroid U3
> board.
> 
> Cc: Viresh Kumar 
> Cc: Thomas Abraham 
> Cc: Javier Martinez Canillas 
> Cc: Krzysztof Kozlowski 
> Cc: Marek Szyprowski 
> Cc: Tobias Jakobi 
> Signed-off-by: Bartlomiej Zolnierkiewicz 
> ---
> This patch supersedes "[PATCH] ARM: dts: exynos4412-odroid-*: add
> workaround for CPUfreq/reboot issue" one from yesterday.
> 
>  drivers/cpufreq/cpufreq-dt.c | 7 +++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
> index c3583cd..c9138c7 100644
> --- a/drivers/cpufreq/cpufreq-dt.c
> +++ b/drivers/cpufreq/cpufreq-dt.c
> @@ -329,6 +329,10 @@ static int cpufreq_init(struct cpufreq_policy *policy)
>   policy->driver_data = priv;
>  
>   policy->clk = cpu_clk;
> +
> + /* capture boot frequency */
> + policy->suspend_freq = clk_get_rate(cpu_clk) / 1000;;

We should be using opp-v2's suspend-opp thing for this now..

-- 
viresh
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