u-boot 2011.10rc: Fix pmic shut down over USB power
authorJoel A Fernandes <joelagnel@ti.com>
Fri, 4 Nov 2011 03:37:48 +0000 (22:37 -0500)
committerKoen Kooi <koen@dominion.thruhere.net>
Fri, 4 Nov 2011 07:16:36 +0000 (08:16 +0100)
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>
recipes-bsp/u-boot/u-boot/2011.09git/0006-am335x-evm-Fix-bone-pmic-shut-down-over-USB-power.patch [new file with mode: 0644]
recipes-bsp/u-boot/u-boot_2011.10rc.bb

diff --git a/recipes-bsp/u-boot/u-boot/2011.09git/0006-am335x-evm-Fix-bone-pmic-shut-down-over-USB-power.patch b/recipes-bsp/u-boot/u-boot/2011.09git/0006-am335x-evm-Fix-bone-pmic-shut-down-over-USB-power.patch
new file mode 100644 (file)
index 0000000..2b8caa3
--- /dev/null
@@ -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
+
index eda4a628b4a2257f26cdc56af5ef5502ccdf17ba..cf1979dfb0def48cb1ddd8f03db9cc2988a321b4 100644 (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"