linux-kernel - Re: [PATCH v8 3/4] mfd: cros_ec: Check DT node for usbpd-notify add

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Date:   Mon, 10 Feb 2020 11:11:52 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Prashant Malani <pmalani@...omium.org>, groeck@...omium.org,
        bleung@...omium.org, lee.jones@...aro.org, sre@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v8 3/4] mfd: cros_ec: Check DT node for usbpd-notify add

Hi Prashant,

On 27/1/20 15:50, Enric Balletbo i Serra wrote:
> Hi Prashant,
> 
> On 25/1/20 0:18, Prashant Malani wrote:
>> Add a check to ensure there is indeed an EC device tree entry before
>> adding the cros-usbpd-notify device. This covers configs where both
>> CONFIG_ACPI and CONFIG_OF are defined, but the EC device is defined
>> using device tree and not in ACPI.
>>
>> Signed-off-by: Prashant Malani <pmalani@...omium.org>
> 
> With this change, an playing with different CONFIG_ACPI + CONFIG_OF combinations
> I don't see anymore the problem where the driver is registered twice on
> CONFIG_ACPI side. So,
> 
> Tested-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> 
> Maybe it requires a fixes tag if Lee already picked the other patch?
> 
> Fixes: 4602dce0361e ("mfd: cros_ec: Add cros-usbpd-notify subdevice")
> 

Now that v7 from mfd side was merged and v8 from platform side was merged, could
you resend this specific patch alone collecting all the fixes and tested tags. I
guess will be more clear for mfd people.

Thanks,
 Enric

>> ---
>>
>> Changes in v8:
>> - Patch first introduced in v8 of the series.
>>
>>  drivers/mfd/cros_ec_dev.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
>> index d0c28a4c10ad0..411e80fc9a066 100644
>> --- a/drivers/mfd/cros_ec_dev.c
>> +++ b/drivers/mfd/cros_ec_dev.c
>> @@ -212,7 +212,7 @@ static int ec_device_probe(struct platform_device *pdev)
>>  	 * explicitly added on platforms that don't have the PD notifier ACPI
>>  	 * device entry defined.
>>  	 */
>> -	if (IS_ENABLED(CONFIG_OF)) {
>> +	if (IS_ENABLED(CONFIG_OF) && ec->ec_dev->dev->of_node) {
>>  		if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
>>  			retval = mfd_add_hotplug_devices(ec->dev,
>>  					cros_usbpd_notify_cells,
>>