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authorFabio Estevam <fabio.estevam@nxp.com>2017-02-08 15:33:51 +0300
committerShawn Guo <shawnguo@kernel.org>2017-03-08 16:59:03 +0300
commit4480de8245b7f02c2fa0109efd80f4773397e36a (patch)
tree7c4b34dc8517da2d48414ba9d40d9b5b96dde7c9 /arch/arm/boot/dts/imx53-qsb.dts
parent2e2c3a5a97f9e0c82deef6624f8b31bbbc5298ff (diff)
downloadlinux-4480de8245b7f02c2fa0109efd80f4773397e36a.tar.xz
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: Lucas Stach <l.stach@pengutronix.de> Suggested-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch/arm/boot/dts/imx53-qsb.dts')
-rw-r--r--arch/arm/boot/dts/imx53-qsb.dts4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/imx53-qsb.dts b/arch/arm/boot/dts/imx53-qsb.dts
index f4c158cce908..d3d662e37677 100644
--- a/arch/arm/boot/dts/imx53-qsb.dts
+++ b/arch/arm/boot/dts/imx53-qsb.dts
@@ -88,8 +88,8 @@
};
ldo7_reg: ldo7 {
- regulator-min-microvolt = <1200000>;
- regulator-max-microvolt = <3600000>;
+ regulator-min-microvolt = <2750000>;
+ regulator-max-microvolt = <2750000>;
};
ldo8_reg: ldo8 {