MLK-14373-4: ARM: dts: imx6ul-evk-btwifi: Fix SN8000CMK bringup error

Fix SN8000CMK bring-up error on i.MX6UL/ULL EVK’s: BT_REG_ON line pulled
low prior to SDIO initialization. This fix applies to all modules: i.e.
default operation for all modules is that both WL_REG_ON and BT_REG_ON
lines are pulled low (0V) during power-on-reset.

Signed-off-by: xlin <xlin@murata.com>
Signed-off-by: Tiberiu Breana <andrei-tiberiu.breana@nxp.com>

diff --git a/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi b/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi
index e04c9f5..012f4d6 100644 (file)
--- a/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi
+++ b/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi
@@ -54,3 +54,10 @@
        pm-ignore-notify;
        wifi-host; /* add hook for SD card detect mechanism for BCMDHD driver */
 };
+
+&gpio_spi {
+       /* Murata: modify default setting so that BT_nPWD/BT_REG_ON
+        * is low (0V) during kernel boot.
+        */
+       registers-default = /bits/ 8 <0x47>;
+};