lkml.org 
[lkml]   [2015]   [Sep]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ARM: dts: am57xx-beagle-x15: Update Phy supplies
Date
Originally, all the SoC PHY rails were supplied by LDO3. However, as a
result of characterization, it was determined that this posed a risk in
extreme load conditions. Hence the PHY rails are split between two
different LDOs. Update the related node as a result

LDO3/VDDA_1V8_PHYA supplies vdda_usb1, vdda_usb2, vdda_sata, vdda_usb3
LDO4/VDDA_1V8_PHYB supplies vdda_pcie1, vdda_pcie0, vdda_hdmi, vdda_pcie

NOTE: We break compatibility with pre-production boards with this change
since, the PMIC LDO4 is disabled at OTP level.

The new configuration is the plan of record and all pre-production
boards are supposed to be replaced with the latest boards matching the
mentioned configuration.

Signed-off-by: Nishanth Menon <nm@ti.com>
---
arch/arm/boot/dts/am57xx-beagle-x15.dts | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/am57xx-beagle-x15.dts b/arch/arm/boot/dts/am57xx-beagle-x15.dts
index 3a05b94f59ed..ede7fb73c717 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15.dts
@@ -432,7 +432,7 @@
};

ldo3_reg: ldo3 {
- /* VDDA_1V8_PHY */
+ /* VDDA_1V8_PHYA */
regulator-name = "ldo3";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
@@ -440,6 +440,15 @@
regulator-boot-on;
};

+ ldo4_reg: ldo4 {
+ /* VDDA_1V8_PHYB */
+ regulator-name = "ldo4";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
ldo9_reg: ldo9 {
/* VDD_RTC */
regulator-name = "ldo9";
@@ -681,7 +690,7 @@

&hdmi {
status = "ok";
- vdda-supply = <&ldo3_reg>;
+ vdda-supply = <&ldo4_reg>;

pinctrl-names = "default";
pinctrl-0 = <&hdmi_pins>;
--
1.7.9.5


\
 
 \ /
  Last update: 2015-09-03 21:41    [W:0.042 / U:0.244 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site