Hi Andrew-sh.Cheng,

On 6/2/20 9:23 PM, andrew-sh.cheng wrote:

On Thu, 2020-05-28 at 16:17 +0900, Chanwoo Choi wrote:

quoted

Hi Andrew-sh.Cheng,

The exynos-bus.c used the passive governor.
Even if don't make the problem because DEVFREQ_PARENT_DEV is zero,
you need to initialize the parent_type with DEVFREQ_PARENT_DEV as following:

diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 8fa8eb541373..1c71c47bc2ac 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c

@@ -369,6 +369,7 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
                return -ENOMEM;
 
        passive_data->parent = parent_devfreq;
+       passive_data->parent_type = DEVFREQ_PARENT_DEV;
 
        /* Add devfreq device for exynos bus with passive governor */
        bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,

Hi Chanwoo Choi,
Do you just remind me to initialize it to DEVFREQ_PARENT_DEV whn use
this governor?

Yes. This change was not included in this patchset.

I will do it and thank you for reminding.

Thanks.

(snip)


And, this patchset doesn't include the dt-binding example
and any real example in devicetree. If possible, I recommend
you better to update dt-binding document with example.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics

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