recipes-kernel/linux/linux-ti33x-psp-3.2/beaglebone/0055-Workaround-for-EEPROM-contents-blocking-further-I2C-.patch

   1 From 8d8ad2973b9d062763f51f1bee0652a6647033a5 Mon Sep 17 00:00:00 2001
   2 From: Bas Laarhoven <sjml@xs4all.nl>
   3 Date: Mon, 14 May 2012 15:07:43 +0200
   4 Subject: [PATCH 55/79] Workaround for EEPROM contents blocking further I2C
   5  bus access.
   6
   7 Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
   8 ---
   9  arch/arm/mach-omap2/board-am335xevm.c |    5 ++++-
  10  1 file changed, 4 insertions(+), 1 deletion(-)
  11
  12 diff --git a/arch/arm/mach-omap2/board-am335xevm.c b/arch/arm/mach-omap2/board-am335xevm.c
  13 index 0a1738a..0fa8a32 100644
  14 --- a/arch/arm/mach-omap2/board-am335xevm.c
  15 +++ b/arch/arm/mach-omap2/board-am335xevm.c
  16 @@ -2501,7 +2501,10 @@ static void bone_io_config_from_cape_eeprom( void)
  17                 const char* pin_name = cape_pins[ i];
  18                 pin_def pin_setting = { .value = BIG_ENDIAN_16( *pmuxdata) };
  19
  20 -               if (pin_setting.used) {
  21 +               // Detect broken I2C configuration to prevent bus hangup!
  22 +               if (i >= 9 && i <= 10) {
  23 +                       status[ i] = '-';
  24 +               } else if (pin_setting.used) {
  25                         switch (bone_io_config_pin( pin_name, pin_setting)) {
  26                         case 0:  status[ i] = 'i'; break;
  27                         case 1:  status[ i] = 'o'; break;
  28 --
  29 1.7.10
  30