[PATCH 1/3] mmc: dw_mmc: use mmc_regulator_get_supply to handle regulators

[Doug Anderson]

Yuvaraj,

On Fri, Jun 27, 2014 at 3:59 AM, Yuvaraj Kumar <yuvaraj.cd at gmail.com> wrote:
>>> mmc_regulator_set_ocr() is failing as its a fixed-regulator.
>>
>> Can you explain more about what's failing?  It sure looks like mmc
>> core is supposed to handle this given comments below
>>
>> /*
>> * If we're using a fixed/static regulator, don't call
>> * regulator_set_voltage; it would fail.
>> */
> tps65090 driver does not register through fixed regulator framework.It
> uses normal regulator framework and supports only
> enable/disable/is_enabled callbacks.Also it lacks certain callbacks
> for list_voltage, get_voltage ,set_voltage etc.
> [    2.306476] dwmmc_exynos 12220000.mmc: Failed getting OCR mask: -22
> [    2.393403] dwmmc_exynos 12220000.mmc: could not set regulator OCR (-22)
> For the above reason,regulator framework treats fet4 as unused
> regulator and disables the vmmc regulator.

Ah.  Perhaps tps65090 needs to be fixed then...  I'm not sure any
other drivers cared before so maybe that's why it was never caught?

-Doug