[8/9] ARM: dts: omap5-uevm: update LDO7 voltage to 2V and settings

Submitted by Nishanth Menon on July 17, 2013, 4:45 p.m.

Details

Message ID 1374079538-19548-9-git-send-email-nm@ti.com
State New
Headers show

Commit Message

Nishanth Menon July 17, 2013, 4:45 p.m.
commit e00c27ef3b4c23e39d0a77b7c8e5be44c28001c7
(ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes)
introduced regulator entries for OMAP5uEVM.

However, The regulator information is based on an older temporary
pre-production board variant and does not reflect production board
750-2628-XXX boards.

LDO4 supplies VDD_VPP which is vpp1. This is currently configured for
1.5V which as per data manual "A pulse width of 1000 ns and an amplitude
of 2V is required to program each eFuse bit. Otherwise, VPP1 must not
be supplied".

So, fix the voltage to 2V. and disable the supply since we have no plans
of programming efuse bits - it can only be done once - in factory.

Further it is not enabled by default by PMIC so, 'boot-on' must be
removed, and the 'always-on' needs to be removed to achieve pulsing
if efuse needs to be programmed.

Reported-by: Marc J├╝ttner <m-juettner@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
---
 arch/arm/boot/dts/omap5-uevm.dts |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch hide | download patch | download mbox

diff --git a/arch/arm/boot/dts/omap5-uevm.dts b/arch/arm/boot/dts/omap5-uevm.dts
index 3ff5874..ef05676 100644
--- a/arch/arm/boot/dts/omap5-uevm.dts
+++ b/arch/arm/boot/dts/omap5-uevm.dts
@@ -397,10 +397,10 @@ 
 				ldo7_reg: ldo7 {
 					/* VDD_VPP: vpp1 */
 					regulator-name = "ldo7";
-					regulator-min-microvolt = <1500000>;
-					regulator-max-microvolt = <1500000>;
-					regulator-always-on;
-					regulator-boot-on;
+					regulator-min-microvolt = <2000000>;
+					regulator-max-microvolt = <2000000>;
+					/* Only for efuse reprograming! */
+					status = "disabled";
 				};
 
 				ldo8_reg: ldo8 {