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 v2] am335x-evm: Fix bone pmic shut down over USB power
   5 Cc: trini@ti.com,
   6     chase.maupin@ti.com
   7
   8 * Set DCDC2 to 1.2v for all power sources and board revs except for A1
   9 * Set USB current trip point to 1300mA for all boards and power sources.
  10 * Only Skip setting of MPU frequency to 720MHz for A1 and USB-powered boards.
  11
  12 Credits to Jason for noticing this. Tested with several reboots over USB on a Rev A2/3.
  13
  14 v2 changes:
  15 Take care of not upping DCDC2 and LDO voltages for A1.
  16 For A1- only operation done is to set the USB current limit.
  17
  18 Signed-off-by: Jason Kridner <jdk@ti.com>
  19 Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
  20 ---
  21 Chase has volunteered to test this out on his A1.
  22
  23  board/ti/am335x/evm.c |   31 ++++++++++++++++---------------
  24  1 files changed, 16 insertions(+), 15 deletions(-)
  25
  26 diff --git a/board/ti/am335x/evm.c b/board/ti/am335x/evm.c
  27 index e95a088..bc1119e 100644
  28 --- a/board/ti/am335x/evm.c
  29 +++ b/board/ti/am335x/evm.c
  30 @@ -483,12 +483,20 @@ void spl_board_init(void)
  31                 if (tps65217_reg_read(STATUS, &pmic_status_reg))
  32                         return;
  33
  34 +               /* Increase USB current limit to 1300mA */
  35 +               if (tps65217_reg_write(PROT_LEVEL_NONE, POWER_PATH,
  36 +                                      USB_INPUT_CUR_LIMIT_1300MA,
  37 +                                      USB_INPUT_CUR_LIMIT_MASK))
  38 +                       printf("tps65217_reg_write failure\n");
  39 +
  40                 /* Only perform PMIC configurations if board rev > A1 */
  41                 if (!strncmp(header.version, "00A1", 4))
  42                         return;
  43
  44 -               if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
  45 -                       printf("No AC power, disabling frequency switch\n");
  46 +               /* Set DCDC2 (MPU) voltage to 1.275V */
  47 +               if (tps65217_voltage_update(DEFDCDC2,
  48 +                                            DCDC_VOLT_SEL_1275MV)) {
  49 +                       printf("tps65217_voltage_update failure\n");
  50                         return;
  51                 }
  52
  53 @@ -501,20 +509,13 @@ void spl_board_init(void)
  54                                        LDO_VOLTAGE_OUT_3_3, LDO_MASK))
  55                         printf("tps65217_reg_write failure\n");
  56
  57 -               /* Increase USB current limit to 1300mA */
  58 -               if (tps65217_reg_write(PROT_LEVEL_NONE, POWER_PATH,
  59 -                                      USB_INPUT_CUR_LIMIT_1300MA,
  60 -                                      USB_INPUT_CUR_LIMIT_MASK))
  61 -                       printf("tps65217_reg_write failure\n");
  62 -
  63 -               /* Set DCDC2 (MPU) voltage to 1.275V */
  64 -               if (!tps65217_voltage_update(DEFDCDC2,
  65 -                                            DCDC_VOLT_SEL_1275MV)) {
  66 -                       /* Set MPU Frequency to 720MHz */
  67 -                       mpu_pll_config(MPUPLL_M_720);
  68 -               } else {
  69 -                       printf("tps65217_voltage_update failure\n");
  70 +               if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
  71 +                       printf("No AC power, disabling frequency switch\n");
  72 +                       return;
  73                 }
  74 +
  75 +               /* Set MPU Frequency to 720MHz */
  76 +               mpu_pll_config(MPUPLL_M_720);
  77         } else {
  78                 /*
  79                  * EVM PMIC code.  PMIC voltage is configuring for frequency
  80 --
  81 1.7.4.1
  82