Hi Marcin,
On jeu., oct. 15 2015, Marcin Wojtas <m...@semihalf.com> wrote:
> The newest revisions of A388-GP (v1.5 and higher) support only
> DAT3-based card detection. Revisions < v1.5 based on GPIO detection
> via I2C expander, but this solution is supposed to be deprecated on
> new boards. In order to satisfy all type of hardware this commit
> changes card detection to use software polling mechanism. Also a
> comment is added on possible card detection options in A388-GP
> DT board file.
>
> Signed-off-by: Marcin Wojtas <m...@semihalf.com>
> Acked-by: Andrew Lunn <and...@lunn.ch>
Applied on mvebu/dt
Thanks,
Gregory
> ---
> arch/arm/boot/dts/armada-388-gp.dts | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/armada-388-gp.dts
> b/arch/arm/boot/dts/armada-388-gp.dts
> index 391dea9..3deba13 100644
> --- a/arch/arm/boot/dts/armada-388-gp.dts
> +++ b/arch/arm/boot/dts/armada-388-gp.dts
> @@ -213,8 +213,21 @@
> sdhci@d8000 {
> pinctrl-names = "default";
> pinctrl-0 = <&sdhci_pins>;
> - cd-gpios = <&expander0 5 GPIO_ACTIVE_LOW>;
> no-1-8-v;
> + /*
> + * A388-GP board v1.5 and higher replace
> + * hitherto card detection method based on GPIO
> + * with the one using DAT3 pin. As they are
> + * incompatible, software-based polling is
> + * enabled with 'broken-cd' property. For boards
> + * older than v1.5 it can be replaced with:
> + * 'cd-gpios = <&expander0 5 GPIO_ACTIVE_LOW>;',
> + * whereas for the newer ones following can be
> + * used instead:
> + * 'dat3-cd;'
> + * 'cd-inverted;'
> + */
> + broken-cd;
> wp-inverted;
> bus-width = <8>;
> status = "okay";
> --
> 1.8.3.1
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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