Commit 4480de82 authored by Fabio Estevam's avatar Fabio Estevam Committed by Shawn Guo

ARM: dts: imx53-qsb: Constrain the TVE DAC voltage

Quoting Philipp Zabel:
"Since this regulator is used as the TVDAC analog power supply, this
range should at least be limited to the analog power supply range of the
TVDAC, listed in Table 74-9. of the i.MX53 reference manual (2.5-2.75V).

But since the nominal voltage is 2.75V, which was used to determine the
analog gain that is supposed to result in the necessary 0.7V
peak-to-peak amplitude on the VGA output, I'd say we should just fix the
voltage to 2750000 here."

, so limit the TVDAC analog power supply as suggested.
Suggested-by: default avatarLucas Stach <l.stach@pengutronix.de>
Suggested-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 2e2c3a5a
...@@ -88,8 +88,8 @@ ldo6_reg: ldo6 { ...@@ -88,8 +88,8 @@ ldo6_reg: ldo6 {
}; };
ldo7_reg: ldo7 { ldo7_reg: ldo7 {
regulator-min-microvolt = <1200000>; regulator-min-microvolt = <2750000>;
regulator-max-microvolt = <3600000>; regulator-max-microvolt = <2750000>;
}; };
ldo8_reg: ldo8 { ldo8_reg: ldo8 {
......
...@@ -128,8 +128,8 @@ vusb2_reg: vusb2 { ...@@ -128,8 +128,8 @@ vusb2_reg: vusb2 {
vdac_reg: vdac { vdac_reg: vdac {
regulator-name = "VDAC"; regulator-name = "VDAC";
regulator-min-microvolt = <2500000>; regulator-min-microvolt = <2750000>;
regulator-max-microvolt = <2775000>; regulator-max-microvolt = <2750000>;
}; };
vgen1_reg: vgen1 { vgen1_reg: vgen1 {
......
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