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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 v2] am335x-evm: Fix bone pmic shut down over USB power
Cc: trini@ti.com,
chase.maupin@ti.com
* Set DCDC2 to 1.2v for all power sources and board revs except for A1
* 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 several reboots over USB on a Rev A2/3.
v2 changes:
Take care of not upping DCDC2 and LDO voltages for A1.
For A1- only operation done is to set the USB current limit.
Signed-off-by: Jason Kridner <jdk@ti.com>
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
---
Chase has volunteered to test this out on his A1.
board/ti/am335x/evm.c | 31 ++++++++++++++++---------------
1 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/board/ti/am335x/evm.c b/board/ti/am335x/evm.c
index e95a088..bc1119e 100644
--- a/board/ti/am335x/evm.c
+++ b/board/ti/am335x/evm.c
@@ -483,12 +483,20 @@ void spl_board_init(void)
if (tps65217_reg_read(STATUS, &pmic_status_reg))
return;
+ /* Increase USB current limit to 1300mA */
+ if (tps65217_reg_write(PROT_LEVEL_NONE, POWER_PATH,
+ USB_INPUT_CUR_LIMIT_1300MA,
+ USB_INPUT_CUR_LIMIT_MASK))
+ printf("tps65217_reg_write 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");
+ /* Set DCDC2 (MPU) voltage to 1.275V */
+ if (tps65217_voltage_update(DEFDCDC2,
+ DCDC_VOLT_SEL_1275MV)) {
+ printf("tps65217_voltage_update failure\n");
return;
}
@@ -501,20 +509,13 @@ void spl_board_init(void)
LDO_VOLTAGE_OUT_3_3, LDO_MASK))
printf("tps65217_reg_write failure\n");
- /* Increase USB current limit to 1300mA */
- if (tps65217_reg_write(PROT_LEVEL_NONE, POWER_PATH,
- USB_INPUT_CUR_LIMIT_1300MA,
- 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");
+ 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
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