[PATCH 0/3] Fix mmc/sd card detect gpio dt definition

[Mugunthan V N]

The mmc/sd card detect gpio definition in DT is not defined as
per hardware design, the card detect gpio is an active low
signal.

As per MMC/SD device tree binding documentation, the card detect
signal should be an active low signal and when ever a hardware is
designed with an active high card detect gpio then "cd-inverted"
dt parameter should be used to detect the actual status for the
card.

This was not captured till now because gpio is used as interrupt
source and mmc_rescan task is scheduled. The value of the gpio
is not used to determine card presence.

Pushed a branch [1] for testing and tested this patch series on
am335x bone black [2], am437x-gp evm [3] and dra72x evm [4].

[1]: git://git.ti.com/~mugunthanvnm/ti-linux-kernel/linux.git mmc-cd-gpio-fix
[2]: http://pastebin.ubuntu.com/12762164/
[3]: http://pastebin.ubuntu.com/12762168/
[4]: http://pastebin.ubuntu.com/12762169/

Mugunthan V N (3):
  ARM: DTS: am335x: fix cd-gpios definition as per hardware design and
dt binding docs
  ARM: DTS: am43xx: fix cd-gpios definition as per hardware design and
dt binding docs
  ARM: DTS: dra7xx: am57xx: fix cd-gpios definition as per hardware
design and dt binding docs

 arch/arm/boot/dts/am335x-bone-common.dtsi | 3 +--
 arch/arm/boot/dts/am335x-evm.dts  | 2 +-
 arch/arm/boot/dts/am335x-evmsk.dts| 2 +-
 arch/arm/boot/dts/am437x-gp-evm.dts   | 2 +-
 arch/arm/boot/dts/am437x-idk-evm.dts  | 2 +-
 arch/arm/boot/dts/am437x-sk-evm.dts   | 2 +-
 arch/arm/boot/dts/am43x-epos-evm.dts  | 2 +-
 arch/arm/boot/dts/am57xx-beagle-x15.dts   | 2 +-
 arch/arm/boot/dts/dra7-evm.dts| 2 +-
 arch/arm/boot/dts/dra72-evm.dts   | 2 +-
 10 files changed, 10 insertions(+), 11 deletions(-)

-- 
2.6.1.133.gf5b6079

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 0/3] Fix mmc/sd card detect gpio dt definition

[Tony Lindgren]

* Mugunthan V N  [151012 02:12]:
> The mmc/sd card detect gpio definition in DT is not defined as
> per hardware design, the card detect gpio is an active low
> signal.
> 
> As per MMC/SD device tree binding documentation, the card detect
> signal should be an active low signal and when ever a hardware is
> designed with an active high card detect gpio then "cd-inverted"
> dt parameter should be used to detect the actual status for the
> card.
> 
> This was not captured till now because gpio is used as interrupt
> source and mmc_rescan task is scheduled. The value of the gpio
> is not used to determine card presence.

OK applying into omap-for-v4.4/dt thanks.

Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html