i2c for omap5912,help me

i2c for omap5912,help me

[李玮]

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Hi ,
 
 I'm using an omap5912 and would like to light the led D3 
on the board thru the i2c driver.
Now I  can not see nothing in /proc/sys/dev/ and  /dev,
but I can see there is something about
 i2c in /proc/bus/. I can not open the file,Could there
be something wrong with my opening the dev file ? I hope
there is someone who knows my problem? Thanks in
advance.
 Below are  the debug msg aswell as the code. 

  int adapter_nr = 0;
  int file;
  char filename[20]; 
  sprintf(filename,"/dev/i2c-%d",adapter_nr);
   if ((file = open(filename,O_RDWR)) < 0) {
     printf("Error Opening File\n");
     exit(1);
   }

the file value is allways 1,Who can help me?Thanks!

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RE: i2c for omap5912,help me

[Ishigami, Tatsuya]

Hi,

 Does this help?

 http://oskfordummies.hp.infoseek.co.jp/howto/led.html 

 Regards,
 Ishigami

-----Original Message-----
From: 李玮 [mailto:coffeeyu531@126.com] 
Sent: Thursday, December 07, 2006 10:51 PM
To: linux-omap-open-source@linux.omap.com
Subject: i2c for omap5912,help me

Hi ,
 
 I'm using an omap5912 and would like to light the led D3 
on the board thru the i2c driver.
Now I  can not see nothing in /proc/sys/dev/ and  /dev,
but I can see there is something about
 i2c in /proc/bus/. I can not open the file,Could there
be something wrong with my opening the dev file ? I hope
there is someone who knows my problem? Thanks in
advance.
 Below are  the debug msg aswell as the code. 

  int adapter_nr = 0;
  int file;
  char filename[20]; 
  sprintf(filename,"/dev/i2c-%d",adapter_nr);
   if ((file = open(filename,O_RDWR)) < 0) {
     printf("Error Opening File\n");
     exit(1);
   }

the file value is allways 1,Who can help me?Thanks!

Re: i2c for omap5912,help me

[David Brownell]

>  I'm using an omap5912 and would like to light the led D3 
> on the board thru the i2c driver.

In the kernel, <asm/arch/tps65010.h> exports

extern int tps65010_set_led(unsigned led, unsigned mode);
extern int tps65010_set_gpio_out_value(unsigned gpio, unsigned value);

which are used for those LEDs.  D3 is connected to TPS65010 GPIO 2...