ARM: dts: imx6sl-evk: Keep VGEN1 regulator always enabled

On imx6sl-evk board the VGEN1 regulator powers up the NVCC_1P2V domain of the
imx6sl SoC, so we need to keep it always powered.

According to imx6sl datasheet the GPIO block has three supplies:
NVCC33_IO, NVCC18_IO and NVCC_1P2V and it states that:
"All digital I/O supplies (NVCC_xxxx) must be powered under normal conditions
whether the associated I/O pins are in use or not"

This problem has been observed by the fact that a GPIO connected to an LED could
not work when the PMIC driver was enabled.

Keeping VGEN1 regulator always enabled fixes the problem.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --git a/arch/arm/boot/dts/imx6sl-evk.dts b/arch/arm/boot/dts/imx6sl-evk.dts
index 889422cc2c2416bf2d5f3f0272f24c05d3373521..864d8dfb51ca525ebc04c0769073fdeda273835b 100644 (file)
--- a/arch/arm/boot/dts/imx6sl-evk.dts
+++ b/arch/arm/boot/dts/imx6sl-evk.dts
@@ -195,6 +195,7 @@
                        vgen1_reg: vgen1 {
                                regulator-min-microvolt = <800000>;
                                regulator-max-microvolt = <1550000>;
+                               regulator-always-on;
                        };
 
                        vgen2_reg: vgen2 {