#3479 BLOC Untriag: i2c timeout hang

[Zarro Boogs per Child]

#3479: i2c timeout hang
----------------------+-----------------------------------------------------
  Reporter:  cjb      |       Owner:  dilinger 
      Type:  defect   |      Status:  new      
  Priority:  blocker  |   Milestone:  Untriaged
 Component:  kernel   |     Version:           
Resolution:           |    Keywords:           
  Verified:  0        |  
----------------------+-----------------------------------------------------

Comment(by dilinger):

 For posterity, here's the kernel code:

 {{{
 #define SMBCLR (0xc000<<16)
 outl(SMBCLR, gpio_base + GPIO_OUTPUT_AUX1);
 outl(SMBCLR, gpio_base + GPIO_OUTPUT_AUX2);
 outl(SMBCLR, gpio_base + GPIO_INPUT_AUX1);
 outl(SMBCLR, gpio_base + GPIO_OUTPUT_VAL);
 outl(SMBCLR, gpio_base + GPIO_OUTPUT_ENABLE);
 for (x=0; x<8; x++) {
         udelay(5);
         outl(0x4000<<16, gpio_base + GPIO_OUTPUT_VAL);
         udelay(5);
         outl(0x4000, gpio_base + GPIO_OUTPUT_VAL);
         udelay(5);
 }
 outl(SMBCLR, gpio_base + GPIO_INPUT_AUX1);
 outl(SMBCLR, gpio_base + GPIO_OUTPUT_AUX1);


 }}}

 However, it breaks things badly.  Not worth dealing with.

-- 
Ticket URL: <https://dev.laptop.org/ticket/3479#comment:14>
One Laptop Per Child <https://dev.laptop.org>
OLPC bug tracking system