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Subject[PATCH 5/5] ARM: imx: ventana: enable LDO bypass mode for GW54xx
Date
The GW54xx baseboard has a PFUZE100 PMIC capable of regulating the
core voltages (VDD_ARM, VDD_SOC) externally such that the internal IMX6
anatop LDO regulators are not needed. This provides a power reduction
(as the PMIC is more efficient than the LDO's) as well as moves some
of the power/thermal burden from the IMX to the PMIC.

Cc: devicetree@vger.kernel.org
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---
arch/arm/boot/dts/imx6qdl-gw54xx.dtsi | 55 +++++++++++++++++++++++++----------
1 file changed, 39 insertions(+), 16 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
index cf13239..3ab0872 100644
--- a/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw54xx.dtsi
@@ -142,6 +142,11 @@
status = "okay";
};

+&cpu0 {
+ arm-supply = <&reg_vdd_arm>;
+ soc-supply = <&reg_vdd_soc>;
+};
+
&fec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet>;
@@ -215,7 +220,8 @@
reg = <0x08>;

regulators {
- sw1a_reg: sw1ab {
+ /* VDD_ARM */
+ reg_vdd_arm: sw1ab {
regulator-min-microvolt = <300000>;
regulator-max-microvolt = <1875000>;
regulator-boot-on;
@@ -223,7 +229,8 @@
regulator-ramp-delay = <6250>;
};

- sw1c_reg: sw1c {
+ /* VDD_SOC */
+ reg_vdd_soc: sw1c {
regulator-min-microvolt = <300000>;
regulator-max-microvolt = <1875000>;
regulator-boot-on;
@@ -231,77 +238,93 @@
regulator-ramp-delay = <6250>;
};

- sw2_reg: sw2 {
+ /* VDD_HIGH */
+ reg_3p0v: sw2 {
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3950000>;
regulator-boot-on;
regulator-always-on;
};

- sw3a_reg: sw3a {
+ /* VDD_DDR */
+ reg_ddra: sw3a {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <1975000>;
regulator-boot-on;
regulator-always-on;
};

- sw3b_reg: sw3b {
+ /* VDD_DDR */
+ reg_ddrb: sw3b {
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <1975000>;
regulator-boot-on;
regulator-always-on;
};

- sw4_reg: sw4 {
+ /* VDD_1P8 */
+ reg_1p8v: sw4 {
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <3300000>;
};

- swbst_reg: swbst {
+ /* VDD_5P0 */
+ reg_swbst: swbst {
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5150000>;
};

- snvs_reg: vsnvs {
+ reg_snvs: vsnvs {
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <3000000>;
regulator-boot-on;
regulator-always-on;
};

- vref_reg: vrefddr {
+ /* VDD_VREF */
+ reg_vref: vrefddr {
regulator-boot-on;
regulator-always-on;
};

- vgen1_reg: vgen1 {
+ /* VDD_PCI_1P5_1 */
+ reg_1p5va: vgen1 {
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <1550000>;
+ regulator-boot-on;
+ regulator-always-on;
};

- vgen2_reg: vgen2 {
+ /* VDD_PCI_1P5_2 */
+ reg_1p5vb: vgen2 {
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <1550000>;
+ regulator-boot-on;
+ regulator-always-on;
};

- vgen3_reg: vgen3 {
+ /* unused */
+ reg_vgen3: vgen3 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
};

- vgen4_reg: vgen4 {
+ /* VDD_AUD_1P8 */
+ reg_aud_1p8v: vgen4 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};

- vgen5_reg: vgen5 {
+ /* VDD_2P5 */
+ reg_2p5v: vgen5 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};

- vgen6_reg: vgen6 {
+ /* unused */
+ reg_vgen6: vgen6 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
@@ -320,7 +343,7 @@
compatible = "fsl,sgtl5000";
reg = <0x0a>;
clocks = <&clks 201>;
- VDDA-supply = <&sw4_reg>;
+ VDDA-supply = <&reg_1p8v>;
VDDIO-supply = <&reg_3p3v>;
};

--
1.8.3.2


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