[U-Boot] [PATCH 1/1] Set VLD04 output to 2.8V in PMIC initialization.

[Fabio Estevam]

Hi Gautam,

On Wed, Jun 21, 2017 at 1:18 PM, Gautam Bhat <mindentropy at gmail.com> wrote:
> This change sets the VLDO4 settings output to 2.8V in PMIC
> initialization so that the MIPI DSI and MIPI CSI input voltage
> is 2.8V as per the schematics.

As we do not have MIPI DSI / MIPI CSI support in U-Boot, it is
preferable to let the kernel configure the regulator.

You can do this is the device tree like this:

diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
index 54c4540..923aa755 100644
--- a/arch/arm/boot/dts/imx7d-sdb.dts
+++ b/arch/arm/boot/dts/imx7d-sdb.dts
@@ -285,8 +285,8 @@
                        };

                        vgen6_reg: vldo4 {
-                               regulator-min-microvolt = <1800000>;
-                               regulator-max-microvolt = <3300000>;
+                               regulator-min-microvolt = <2800000>;
+                               regulator-max-microvolt = <2800000>;
                                regulator-always-on;
                        };
                };

Regards,

Fabio Estevam