recipes-bsp/u-boot/u-boot/2011.09git/0006-am335x-evm-Fix-bone-pmic-shut-down-over-USB-power.patch

   1 From 801316091ac7e14cc8fa9b0bd2cdce76bea06991 Mon Sep 17 00:00:00 2001
   2 From: Joel A Fernandes <joelagnel@ti.com>
   3 Date: Thu, 3 Nov 2011 22:19:19 -0500
   4 Subject: [PATCH] am335x-evm: Fix bone pmic shut down over USB power
   5 Cc: trini@ti.com
   6
   7 * Set DCDC2 to 1.2v for all boards irrespective of board version, or power source.
   8 * Set USB current trip point to 1300mA for all boards and power sources.
   9 * Only Skip setting of MPU frequency to 720MHz for A1 and USB-powered boards.
  10
  11 Credits to Jason for noticing this. Tested with 20 reboots over USB.
  12
  13 Signed-off-by: Jason Kridner <jdk@ti.com>
  14 Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
  15 ---
  16  board/ti/am335x/evm.c |   27 ++++++++++++++-------------
  17  1 files changed, 14 insertions(+), 13 deletions(-)
  18
  19 diff --git a/board/ti/am335x/evm.c b/board/ti/am335x/evm.c
  20 index e95a088..bd3c09a 100644
  21 --- a/board/ti/am335x/evm.c
  22 +++ b/board/ti/am335x/evm.c
  23 @@ -483,12 +483,10 @@ void spl_board_init(void)
  24                 if (tps65217_reg_read(STATUS, &pmic_status_reg))
  25                         return;
  26
  27 -               /* Only perform PMIC configurations if board rev > A1 */
  28 -               if (!strncmp(header.version, "00A1", 4))
  29 -                       return;
  30 -
  31 -               if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
  32 -                       printf("No AC power, disabling frequency switch\n");
  33 +               /* Set DCDC2 (MPU) voltage to 1.275V */
  34 +               if (tps65217_voltage_update(DEFDCDC2,
  35 +                                            DCDC_VOLT_SEL_1275MV)) {
  36 +                       printf("tps65217_voltage_update failure\n");
  37                         return;
  38                 }
  39
  40 @@ -507,14 +505,17 @@ void spl_board_init(void)
  41                                        USB_INPUT_CUR_LIMIT_MASK))
  42                         printf("tps65217_reg_write failure\n");
  43
  44 -               /* Set DCDC2 (MPU) voltage to 1.275V */
  45 -               if (!tps65217_voltage_update(DEFDCDC2,
  46 -                                            DCDC_VOLT_SEL_1275MV)) {
  47 -                       /* Set MPU Frequency to 720MHz */
  48 -                       mpu_pll_config(MPUPLL_M_720);
  49 -               } else {
  50 -                       printf("tps65217_voltage_update failure\n");
  51 +               /* Only perform PMIC configurations if board rev > A1 */
  52 +               if (!strncmp(header.version, "00A1", 4))
  53 +                       return;
  54 +
  55 +               if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
  56 +                       printf("No AC power, disabling frequency switch\n");
  57 +                       return;
  58                 }
  59 +
  60 +               /* Set MPU Frequency to 720MHz */
  61 +               mpu_pll_config(MPUPLL_M_720);
  62         } else {
  63                 /*
  64                  * EVM PMIC code.  PMIC voltage is configuring for frequency
  65 --
  66 1.7.4.1
  67