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Probleim in accessing DS18B20 over GPIO Pin using phytec phyCore AM3359 baord

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Dear all,

I am using phytec phyCore AM3359 board and  would like to access DS18B20 via available gpio pins at GPIO Expansion board. Please tell me how to do it?

Following i explain briefly what i have done so far      
a)
done kernel configuration with "ptxdist kernelconfig" and enabled "GPIO 1-wire busmaster" and "Thermal Family Implentation" like:

Device Drivers>
                        * Dallas 1-wire Support>
                               1-wire Bus Masters-> 
                                 * GPIO 1-wire busmaster            
                               1-wire Slaves->
                                  *Thermal family implentation
b)
 modified the board-pcm051.c: 

 static struct pinmux_config w1_gpio_pin_mux[] = {
        {"gpmc_csn1.gpio1_30",  OMAP_MUX_MODE7|AM33XX_PIN_OUTPUT},
        {NULL, 0},
};    

#define PCM051_W1_PIN   GPIO_TO_PIN(1, 30)

static struct w1_gpio_platform_data w1_gpio_pdata={
       .pin =PCM051_W1_PIN,
        .is_open_drain = 0, 
};
static struct platform_device w1_device = {
         .name = "w1-gpio",
         .id = -1,
         .dev.platform_data = &w1_gpio_pdata,  
};
static void __init pcm051_w1_init(void)
{
           int err;
           setup_pin_mux(w1_gpio_pin_mux); 
           err = platform_device_register(&w1_device);
            if(err)
             { 
               pr_err(" failed to register temp sensor device: DS18B \n");
              }
             else
              {
              printk("successfull: temp sensor");
              }
} 

static void __init pcm051_init(void)
{
......
pcm051_w1_init();
}

Result:
i can see (using oscilloscop) that slave (DS1820) responses to master but slave is not detected as no respective directory is found in sys file sytsem: 

Please help me out to configure the DS18B20 with GPIO.

Best Regards,
Irfan Rafique

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Probleim in accessing DS18B20 over GPIO Pin using phytec phyCore AM3359 baord Irfan Rafique <mir.kiel@gmail.com> - 2013-06-17 11:20 -0700

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