Commit 6b61f249 authored Oct 15, 2015 by Marcin Wojtas Committed by Gregory CLEMENT Oct 16, 2015

ARM: mvebu: set SW polling as SDHCI card detection on A388-GP



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 <mw@semihalf.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

parent 2b63821e

arch/arm/boot/dts/armada-388-gp.dts

+14 −1

Original line number	Diff line number	Diff line
		@@ -207,8 +207,21 @@
		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";