ARM: dts: colibri-imx6ull: Change drive strength for usdhc2

The current setting reflects about 86 Ohms of source-impedance
on the SDIO signals where the WiFi board is hooked up. PCB traces are
routed with 50 Ohms impedance and there are no serial resistors on
those traces.

This commit changes the source-impedance to 52 Ohms to better match our
hardware design.

The impedances given in this commit message refer to 3.3V operation.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6ull-colibri.dtsi b/arch/arm/boot/dts/imx6ull-colibri.dtsi
index 4436556624d6713c48b438f14b52a6d67bd95c45..0cdbf7b6e7285643e7e86196b45537e0d5977488 100644 (file)
--- a/arch/arm/boot/dts/imx6ull-colibri.dtsi
+++ b/arch/arm/boot/dts/imx6ull-colibri.dtsi
@@ -522,12 +522,12 @@
 
        pinctrl_usdhc2: usdhc2-grp {
                fsl,pins = <
-                       MX6UL_PAD_CSI_DATA00__USDHC2_DATA0      0x17059
-                       MX6UL_PAD_CSI_DATA01__USDHC2_DATA1      0x17059
-                       MX6UL_PAD_CSI_DATA02__USDHC2_DATA2      0x17059
-                       MX6UL_PAD_CSI_DATA03__USDHC2_DATA3      0x17059
-                       MX6UL_PAD_CSI_HSYNC__USDHC2_CMD         0x17059
-                       MX6UL_PAD_CSI_VSYNC__USDHC2_CLK         0x17059
+                       MX6UL_PAD_CSI_DATA00__USDHC2_DATA0      0x17069
+                       MX6UL_PAD_CSI_DATA01__USDHC2_DATA1      0x17069
+                       MX6UL_PAD_CSI_DATA02__USDHC2_DATA2      0x17069
+                       MX6UL_PAD_CSI_DATA03__USDHC2_DATA3      0x17069
+                       MX6UL_PAD_CSI_HSYNC__USDHC2_CMD         0x17069
+                       MX6UL_PAD_CSI_VSYNC__USDHC2_CLK         0x17069
 
                        MX6UL_PAD_GPIO1_IO03__OSC32K_32K_OUT    0x10
                >;