From mboxrd@z Thu Jan 1 00:00:00 1970 From: festevam@gmail.com (Fabio Estevam) Date: Wed, 19 Feb 2014 08:13:48 -0300 Subject: [PATCH v2] ARM: dts: imx6sl-evk: Keep VGEN1 regulator always enabled Message-ID: <1392808428-26143-1-git-send-email-festevam@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Fabio Estevam 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 --- Changes since v1: - Explain why VGEN1 disabled impacts the GPIO function - Remove 'regulator-boot-on' as per Mark Brown's suggestion arch/arm/boot/dts/imx6sl-evk.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/imx6sl-evk.dts b/arch/arm/boot/dts/imx6sl-evk.dts index 889422c..864d8df 100644 --- 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 { -- 1.8.1.2