linux-kernel - Re: [rtc-linux] [PATCH-v2] rtc: 88pm80x: add device tree support

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Date:	Thu, 25 Jun 2015 13:16:09 +0530
From:	Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
CC:	linux-arm-kernel@...ts.infradead.org, robh+dt@...nel.org,
	lee.jones@...aro.org, devicetree@...r.kernel.org,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org,
	Chao Xie <chao.xie@...vell.com>
Subject: Re: [rtc-linux] [PATCH-v2] rtc: 88pm80x: add device tree support



On Saturday 20 June 2015 06:13 AM, Alexandre Belloni wrote:
> Hi,
>

Sorry I missed this email.
Just wanted to send reminder email and saw this :)

> On 18/06/2015 at 00:28:06 +0530, Vaibhav Hiremath wrote :
>> -	pdata = dev_get_platdata(&pdev->dev);
>> -	if (pdata == NULL)
>> -		dev_warn(&pdev->dev, "No platform data!\n");
>> +	if (!pdata && !node) {
>> +		dev_err(&pdev->dev,
>> +			"pm80x-rtc requires platform data or of_node\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	if (!pdata) {
>> +		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
>
> I had troubles to follow the rtc_wakeup initialization cleanup but it
> seems OK.

Probably, once we have complete PM support ready then it would be
easier to understand. I think as of now lets have this minimal code for
rtc_wakeup.

> However, I'm wondering why you are adding DT support as this
> will always be probed from the MFD driver which pass the platform_data
> and avoids that allocation.
>

You are right.

Originally, it was cleanup patch,

  - remove pm80x_pdata
  - Add check for pdata and np
  - and around rtc_wakeup

While doing that I added this nice to have allocation.

Thanks,
Vaibhav
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