On 06/04/2014 05:32 AM, Mikko Perttunen wrote:
> This enables the integrated SATA controller on the Tegra124 system-on-chip
> on the Jetson TK1 board and adds regulators for the onboard Molex connector
> commonly used to power SATA devices. The regulators are marked always-on
> since they can be used for other purposes than powering SATA devices.
> diff --git a/arch/arm/boot/dts/tegra124-jetson-tk1.dts b/arch/arm/boot/dts/tegra124-jetson-tk1.dts
> + sata@0,70020000 {
> + target-supply = <&vdd_5v0_sata>;
regulators {
> + /* Molex power connector */
> + vdd_5v0_sata: regulator@13 {
> + compatible = "regulator-fixed";
> + reg = <13>;
> + regulator-name = "+5V_SATA";
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + gpio = <&gpio TEGRA_GPIO(EE, 2) GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + vin-supply = <&vdd_5v0_sys>;
> + regulator-always-on;
> + };
Why is this always-on, considering that the SATA node references this,
and presumably the driver explicitly enables this regulator?
> +
> + vdd_12v0_sata: regulator@14 {
> + compatible = "regulator-fixed";
> + reg = <14>;
> + regulator-name = "+12V_SATA";
> + regulator-min-microvolt = <12000000>;
> + regulator-max-microvolt = <12000000>;
> + gpio = <&gpio TEGRA_GPIO(EE, 2) GPIO_ACTIVE_HIGH>;
> + enable-active-high;
> + vin-supply = <&vdd_mux>;
> + regulator-always-on;
> + };
> };
If there are two regulators required for the SATA devices, shouldn't the
SATA node's target-supply property reference them both? Well, I suppose
there'd need to be target-5v-supply and target-12v-supply properties,
since each regulator property can only reference a single supply, IIRC.
I think the DT binding needs to be updated for this.
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