Both Exynos5420 Peach Pit and Exynos5800 Peach Pi boards
have a tps65090 PMU that has a number of switches (FETs)
that are just on/off devices but they do have a current
limit and the output voltage of the switch is ramped up
within a controlled slope.
After the switch is turned on, a safety timer is started
and before this timer times out the output voltage must
have reached the input voltage. Otherwise the switch is
turned off expecting an overload condition.
So using the maximum output voltage slew rate and the timer
minimum and maximum timeouts, a voltage constraints can be
expressed as bounded limits for the timeout. That is what
is used in the board schematics and should be in the DT too.
Signed-off-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/exynos5420-peach-pit.dts | 14 ++++++++++++++
arch/arm/boot/dts/exynos5800-peach-pi.dts | 14 ++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index d8710c1..eefafe6 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -386,27 +386,41 @@
};
tps65090_fet1: fet1 {
regulator-name = "vcd_led";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <1700000>;
};
tps65090_fet2: fet2 {
regulator-name = "video_mid";
+ regulator-min-microvolt = <4500000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_fet3: fet3 {
regulator-name = "wwan_r";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_fet4: fet4 {
regulator-name = "sdcard";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_fet5: fet5 {
regulator-name = "camout";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
};
tps65090_fet6: fet6 {
regulator-name = "lcd_vdd";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
};
tps65090_fet7: fet7 {
regulator-name = "video_mid_1a";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_ldo1: ldo1 {
diff --git a/arch/arm/boot/dts/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts
index 07b29b7..5c38bc0 100644
--- a/arch/arm/boot/dts/exynos5800-peach-pi.dts
+++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts
@@ -384,27 +384,41 @@
};
tps65090_fet1: fet1 {
regulator-name = "vcd_led";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <1700000>;
};
tps65090_fet2: fet2 {
regulator-name = "video_mid";
+ regulator-min-microvolt = <4500000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_fet3: fet3 {
regulator-name = "wwan_r";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_fet4: fet4 {
regulator-name = "sdcard";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_fet5: fet5 {
regulator-name = "camout";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
};
tps65090_fet6: fet6 {
regulator-name = "lcd_vdd";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
};
tps65090_fet7: fet7 {
regulator-name = "video_mid_1a";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <5500000>;
regulator-always-on;
};
tps65090_ldo1: ldo1 {
--
2.0.0.rc2
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