Skip to content

Commit

Permalink
ARM: dt: tegra: seaboard: add regulators
Browse files Browse the repository at this point in the history 
Seaboard uses a TPS6586x regulator. Instantiate this, and hook up a
couple of fixed GPIO-controlled regulators too.

Two data sources were used for the data encoded here:
* The HW defaults, as extracted from real HW.
* The schematic, which specifies a voltage for each LDO rail.

In most cases these sources matched. The only differences is:

ldo6: The HW default on Springbank is 2.85v. The HW default on Seaboard
is 1.8v. The schematics for both Springbank and Seaboard match at 2.85v.
However, internal research indicates that the schematics are incorrectly
labelled, and 1.8v is correct. The ChromeOS kernel also uses 1.8v.

Note that these settings don't entirely match those in the ChromeOS
kernel found at the URL below. However, the selected values generally
cause no behavior change in the kernel, and so were picked to avoid
regressions.

repo http://git.chromium.org/chromiumos/third_party/kernel.git
branch chromeos-3.2
file arch/arm/mach-tegra/board-seaboard-power.c

Portions based on work by Laxman Dewangan <ldewangan@nvidia.com>

Signed-off-by: Stephen Warren <swarren@nvidia.com>
  • Loading branch information
Stephen Warren committed Sep 6, 2012
1 parent fa4a925 commit 6529e63
Showing 1 changed file with 184 additions and 0 deletions.
184 changes: 184 additions & 0 deletions arch/arm/boot/dts/tegra20-seaboard.dts
View file
Original file line number Diff line number Diff line change
Expand Up @@ -374,6 +374,152 @@
status = "okay";
clock-frequency = <400000>;

pmic: tps6586x@34 {
compatible = "ti,tps6586x";
reg = <0x34>;
interrupts = <0 86 0x4>;

#gpio-cells = <2>;
gpio-controller;

sys-supply = <&vdd_5v0_reg>;
vin-sm0-supply = <&sys_reg>;
vin-sm1-supply = <&sys_reg>;
vin-sm2-supply = <&sys_reg>;
vinldo01-supply = <&sm2_reg>;
vinldo23-supply = <&sm2_reg>;
vinldo4-supply = <&sm2_reg>;
vinldo678-supply = <&sm2_reg>;
vinldo9-supply = <&sm2_reg>;

regulators {
#address-cells = <1>;
#size-cells = <0>;

sys_reg: regulator@0 {
reg = <0>;
regulator-compatible = "sys";
regulator-name = "vdd_sys";
regulator-always-on;
};

regulator@1 {
reg = <1>;
regulator-compatible = "sm0";
regulator-name = "vdd_sm0,vdd_core";
regulator-min-microvolt = <1300000>;
regulator-max-microvolt = <1300000>;
regulator-always-on;
};

regulator@2 {
reg = <2>;
regulator-compatible = "sm1";
regulator-name = "vdd_sm1,vdd_cpu";
regulator-min-microvolt = <1125000>;
regulator-max-microvolt = <1125000>;
regulator-always-on;
};

sm2_reg: regulator@3 {
reg = <3>;
regulator-compatible = "sm2";
regulator-name = "vdd_sm2,vin_ldo*";
regulator-min-microvolt = <3700000>;
regulator-max-microvolt = <3700000>;
regulator-always-on;
};

/* LDO0 is not connected to anything */

regulator@5 {
reg = <5>;
regulator-compatible = "ldo1";
regulator-name = "vdd_ldo1,avdd_pll*";
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
};

regulator@6 {
reg = <6>;
regulator-compatible = "ldo2";
regulator-name = "vdd_ldo2,vdd_rtc";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
};

regulator@7 {
reg = <7>;
regulator-compatible = "ldo3";
regulator-name = "vdd_ldo3,avdd_usb*";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};

regulator@8 {
reg = <8>;
regulator-compatible = "ldo4";
regulator-name = "vdd_ldo4,avdd_osc,vddio_sys";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
};

regulator@9 {
reg = <9>;
regulator-compatible = "ldo5";
regulator-name = "vdd_ldo5,vcore_mmc";
regulator-min-microvolt = <2850000>;
regulator-max-microvolt = <2850000>;
regulator-always-on;
};

regulator@10 {
reg = <10>;
regulator-compatible = "ldo6";
regulator-name = "vdd_ldo6,avdd_vdac,vddio_vi,vddio_cam";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
};

regulator@11 {
reg = <11>;
regulator-compatible = "ldo7";
regulator-name = "vdd_ldo7,avdd_hdmi,vdd_fuse";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};

regulator@12 {
reg = <12>;
regulator-compatible = "ldo8";
regulator-name = "vdd_ldo8,avdd_hdmi_pll";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
};

regulator@13 {
reg = <13>;
regulator-compatible = "ldo9";
regulator-name = "vdd_ldo9,avdd_2v85,vdd_ddr_rx";
regulator-min-microvolt = <2850000>;
regulator-max-microvolt = <2850000>;
regulator-always-on;
};

regulator@14 {
reg = <14>;
regulator-compatible = "ldo_rtc";
regulator-name = "vdd_rtc_out,vdd_cell";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
};
};

temperature-sensor@4c {
compatible = "nct1008";
reg = <0x4c>;
Expand All @@ -387,6 +533,10 @@
};
};

pmc {
nvidia,invert-interrupt;
};

memory-controller@0x7000f400 {
emc-table@190000 {
reg = <190000>;
Expand Down Expand Up @@ -473,6 +623,40 @@
};
};

regulators {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;

vdd_5v0_reg: regulator@0 {
compatible = "regulator-fixed";
reg = <0>;
regulator-name = "vdd_5v0";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-always-on;
};

regulator@1 {
compatible = "regulator-fixed";
reg = <1>;
regulator-name = "vdd_1v5";
regulator-min-microvolt = <1500000>;
regulator-max-microvolt = <1500000>;
gpio = <&pmic 0 0>;
};

regulator@2 {
compatible = "regulator-fixed";
reg = <2>;
regulator-name = "vdd_1v2";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
gpio = <&pmic 1 0>;
enable-active-high;
};
};

sound {
compatible = "nvidia,tegra-audio-wm8903-seaboard",
"nvidia,tegra-audio-wm8903";
Expand Down

0 comments on commit 6529e63

Please sign in to comment.