Re: [PATCH V4 4/4] mmc: pwrseq_simple: Add support for a reset GPIO pin
From: Javier Martinez Canillas <javier@dowhile0.org>
Date: 2015-01-28 10:20:02
Also in:
linux-arm-kernel, linux-devicetree
Possibly related (same subject, not in this thread)
- 2015-01-23 · Re: [PATCH V4 4/4] mmc: pwrseq_simple: Add support for a reset GPIO pin · Javier Martinez Canillas <javier@dowhile0.org>
- 2015-01-23 · Re: [PATCH V4 4/4] mmc: pwrseq_simple: Add support for a reset GPIO pin · Ulf Hansson <hidden>
Hello Ulf, On Mon, Jan 19, 2015 at 10:13 AM, Ulf Hansson [off-list ref] wrote:
The need for reset GPIOs has several times been pointed out from erlier posted patchsets. Especially some WLAN chips which are attached to an SDIO interface may use a GPIO reset. The reset GPIO is asserted at initialization and prior we start the power up procedure. The GPIO will be de-asserted right after the power has been provided to the card, from the ->post_power_on() callback. Note, the reset GPIO is optional. Thus we don't return an error even if we can't find a GPIO for the consumer. Signed-off-by: Ulf Hansson <redacted> ---
Reviewed-by: Javier Martinez Canillas <redacted> Tested-by: Javier Martinez Canillas <redacted> Best regards, Javier