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u-boot 2011.10rc: Fix pmic shut down over USB power

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These are some fixes suggested by Jason Kridner to fix the PMIC
instabilities we've been seeing over USB power.

Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Cc: Jason Kridner <jdk@ti.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
This commit is contained in:
Joel A Fernandes
2011-11-03 22:37:48 -05:00
committed by Koen Kooi
parent 7aff70deab
commit 8f9c640564
2 changed files with 69 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
recipes-bsp/u-boot/u-boot/2011.09git/0006-am335x-evm-Fix-bone-pmic-shut-down-over-USB-power.patch
+67
View File
@@ -0,0 +1,67 @@
From 801316091ac7e14cc8fa9b0bd2cdce76bea06991 Mon Sep 17 00:00:00 2001
From: Joel A Fernandes <joelagnel@ti.com>
Date: Thu, 3 Nov 2011 22:19:19 -0500
Subject: [PATCH] am335x-evm: Fix bone pmic shut down over USB power
Cc: trini@ti.com
* Set DCDC2 to 1.2v for all boards irrespective of board version, or power source.
* Set USB current trip point to 1300mA for all boards and power sources.
* Only Skip setting of MPU frequency to 720MHz for A1 and USB-powered boards.
Credits to Jason for noticing this. Tested with 20 reboots over USB.
Signed-off-by: Jason Kridner <jdk@ti.com>
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
---
board/ti/am335x/evm.c | 27 ++++++++++++++-------------
1 files changed, 14 insertions(+), 13 deletions(-)
diff --git a/board/ti/am335x/evm.c b/board/ti/am335x/evm.c
index e95a088..bd3c09a 100644
--- a/board/ti/am335x/evm.c
+++ b/board/ti/am335x/evm.c
@@ -483,12 +483,10 @@ void spl_board_init(void)
if (tps65217_reg_read(STATUS, &pmic_status_reg))
return;
- /* Only perform PMIC configurations if board rev > A1 */
- if (!strncmp(header.version, "00A1", 4))
- return;
-
- if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
- printf("No AC power, disabling frequency switch\n");
+ /* Set DCDC2 (MPU) voltage to 1.275V */
+ if (tps65217_voltage_update(DEFDCDC2,
+ DCDC_VOLT_SEL_1275MV)) {
+ printf("tps65217_voltage_update failure\n");
return;
}
@@ -507,14 +505,17 @@ void spl_board_init(void)
USB_INPUT_CUR_LIMIT_MASK))
printf("tps65217_reg_write failure\n");
- /* Set DCDC2 (MPU) voltage to 1.275V */
- if (!tps65217_voltage_update(DEFDCDC2,
- DCDC_VOLT_SEL_1275MV)) {
- /* Set MPU Frequency to 720MHz */
- mpu_pll_config(MPUPLL_M_720);
- } else {
- printf("tps65217_voltage_update failure\n");
+ /* Only perform PMIC configurations if board rev > A1 */
+ if (!strncmp(header.version, "00A1", 4))
+ return;
+
+ if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
+ printf("No AC power, disabling frequency switch\n");
+ return;
}
+
+ /* Set MPU Frequency to 720MHz */
+ mpu_pll_config(MPUPLL_M_720);
} else {
/*
* EVM PMIC code. PMIC voltage is configuring for frequency
--
1.7.4.1
recipes-bsp/u-boot/u-boot_2011.10rc.bb
+2 -1
View File
@@ -4,7 +4,7 @@ require u-boot.inc
COMPATIBLE_MACHINE = "(ti33x)"
DEFAULT_PREFERENCE_ti33x = "99"
PV = "2011.09+git"
PR = "r17"
PR = "r18"
# SPL build
UBOOT_BINARY = "u-boot.img"
@@ -17,6 +17,7 @@ SRC_URI = "git://arago-project.org/git/projects/u-boot-am33x.git;protocol=git;br
file://2011.09git/0003-am335x_evm-set-bootdelay-to-1.patch \
file://2011.09git/0004-am335x-evm-make-MMC-rootfs-RO-on-boot-so-fsck-works.patch \
file://2011.09git/0005-am335x-Change-mmc_load_uimage-to-load-at-a-fixed-add.patch \
file://2011.09git/0006-am335x-evm-Fix-bone-pmic-shut-down-over-USB-power.patch \
"
SRCREV = "f63b270e47f62f4d1a05b2001357e215966c6f5a"