[PATCH 06/18] ARM: dts: omap3-overo: Enable MMC2

[Florian Vaussard]

Hello Javier

On 01/09/2014 09:43 PM, Javier Martinez Canillas wrote:
> [adding Enric Balletbo to cc]
> 
> Hello Florian,
> 
> On Thu, Jan 9, 2014 at 1:48 PM, Florian Vaussard
> <florian.vaussard at epfl.ch> wrote:
>> MMC2 is used by the on-board WiFi module populated on some boards
>> (based on Marvell Libertas 8688 SDIO).
>>
>> Note: currently WiFi only works on cold boot, as the module is not
>> properly reset (missing binding for the GPIO reset).
>>
> 
> Have you looked at commit 0e9fd777 ("ARM: dts: omap3-igep: Add support
> for LBEE1USJYC WiFi connected to SDIO") ?
> 
> If I remember correctly the LBEE1USJYC Wifi/BT combo module is
> basically a Marvell Libertas 8688 Wlan and Enric got soft reset
> working too by adding a GPIO property to the regulator for the reset
> GPIO.
> 
> Hope it helps,

Thank you, I got it working. It is a bit messy, as I have 3 GPIOs
(poweron, wifi-reset and bt-reset). As a regulator can control only one
GPIO, I had to define 3 regulators, and assigning them to the vmmc,
vqmmc, and vmmc_aux. I hope that a better solution will pop-up in this
thread [1]. It is a pity that the previous version of the GPIO-reset
controller was not merged.

Florian

[1] http://thread.gmane.org/gmane.linux.ports.arm.kernel/294907