[U-Boot] [PATCH v1] mmc: sdhci: SDHCI controllers also need power

From: Jaehoon Chung <jh80.chung@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v1] mmc: sdhci: SDHCI controllers also need power
Date: Fri, 07 Apr 2017 19:05:45 +0900	[thread overview]
Message-ID: <c5cf83a0-a518-aa77-18c5-1b0da7aa0456@samsung.com> (raw)
In-Reply-To: <CAHp75Vcs5smPkYNYKb9FDnf+u2+e1x1qRnQpyGfF45YDwuVRvg@mail.gmail.com>

Hi Andy,

On 04/06/2017 07:58 PM, Andy Shevchenko wrote:
> On Thu, Apr 6, 2017 at 1:50 PM, Jaehoon Chung <jh80.chung@samsung.com> wrote:
>> On 04/06/2017 06:46 PM, Andy Shevchenko wrote:
>>> On Thu, 2017-04-06 at 18:24 +0900, Jaehoon Chung wrote:
>>>> On 04/06/2017 05:51 PM, Andy Shevchenko wrote:
>>>>> On Thu, Apr 6, 2017 at 6:44 AM, Simon Glass <sjg@chromium.org>
>>>>> wrote:
>>>>>> On 1 April 2017 at 07:11, Andy Shevchenko
>>>>>> <andriy.shevchenko@linux.intel.com> wrote:
> 
>>>> how about mmc_power_init() is called in mmc_probe()?
>>>
>>> Yes, that's what I'm referring to. But the driver is pure SDHCI, it
>>> doesn't call mmc_probe() IIRC.
>>
>> After converting to DM, it might have the dependent to probing sequence.
>> I'm not sure that u-boot has the priority for probing. maybe not...
>>
>> hmm..need to consider this patch..but i will think about more generic solution..
> 
> It would be nice to have a generic solution indeed.

Just thinking about below..?

vcc_sd: sdmmc-regulator {
	...
	regulator-boot-on;
or
	regulator-always-on;
	...

};

It should be always enabled..

Best Regards,
Jaehoon Chung

> 