MLK-11758 dts: mx6ul evk: set regulator wlreg_on always on

Murata adapter VDDIO is derived from sd slot VMMC supply, if usdhc cannot
detect sd/sdio card, VMMC is shutdown that causes VDDIO has no voltage, and
bt cannot work. So BT depends on VDDIO/VMMC.

Now the workaround is set wlreg_on alwasys on, usdhc can detect wifi card
and supply VMMC 3.3V voltage, so that Murata adapter VDDIO has power supply.

Signed-off-by: Fugang Duan <B38611@freescale.com>
(cherry picked from commit f17b5e5be37875e05794621eacf386ec25adf223)

diff --git a/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi b/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi
index 51e8bbd..1f3f8d5 100644 (file)
--- a/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi
+++ b/arch/arm/boot/dts/imx6ul-evk-btwifi.dtsi
@@ -21,6 +21,7 @@
                        regulator-name = "wlreg_on";
                        gpio = <&gpio5 1 0>;
                        startup-delay-us = <100>;
+                       regulator-always-on;
                        enable-active-high;
                };
        };