module probe not working

[Lonni J Friedman]

Sorry, but what's the actual problem that you're trying to solve?  Are
you saying that running 'modprobe mymodule' is silently(?) failing?
Something else?  How did you install this module?

On Sat, Oct 20, 2012 at 12:08 AM, Steve Jardine <sjardine at acm.org> wrote:
> Heya All,
>
>    I have a module that I have written for an i2c device. It will load, but never gets into the probe routine. Any ideas?
>
> It has this basic structure:
>
> #include<linux/module.h>
> #include<linux/delay.h>
> #include<linux/err.h>
> #include<linux/i2c.h>
> #include<linux/interrupt.h>
> #include<linux/kthread.h>
> #include<linux/platform_device.h>
>
>
> static int silly_probe(struct i2c_client *adapter,
>                 const struct i2c_device_id *device_id);
> static int silly_remove(struct i2c_client *client);
>
> static const struct i2c_device_id silly_id[] = { { "silly", 0 }, { }, };
>
> static struct i2c_driver silly_driver = {
>           .driver = {
>                      .name = "silly",
>                      .owner = THIS_MODULE,
>                      },
>           .probe = silly_probe,
>           .remove = __devexit_p(silly_remove),
>           .id_table = silly_id,
>  };
>
> static int silly_probe(struct i2c_client *client,
>                 const struct i2c_device_id *id)
> {
>         char buf[10] = {0};
>         int res;
>
>         //Configure device
>     buf[0]=0xE0;
>     buf[1]=0x60;
>     buf[2]=0xFC;
>     buf[3]=0x0C;
>     res=i2c_master_send(client, buf, 4);
>         if (res!= 4) {
>         /* ERROR HANDLING: i2c transaction failed */
>         printk(KERN_INFO "Failed to write to the i2c bus.\n");
>     }
>     return(res);
> }
>
> /*!
>  * silly I2C detach function
>  *
>  * @param client            struct i2c_client *
>  * @return  Error code indicating success or failure
>  */
> static int silly_remove(struct i2c_client *client) {
>         char buf[10] = {0};
>         int res;
>
>         pr_info("*** %s", __FUNCTION__);
>     buf[0]=0x20; // Shutdown
>
>     res=i2c_master_send(client, buf, 1);
>         if (res != 1) {
>         /* ERROR HANDLING: i2c transaction failed */
>         printk(KERN_INFO "Failed to write to the i2c bus.\n");
>     }
>
>     return(res);
> }
>
>
> static int __init silly_init(void)
>  {
>           /* register driver */
>           int res = i2c_add_driver(&silly_driver);
>           if (res<  0) {
>                   printk(KERN_INFO "add silly i2c driver failed\n");
>                   return -ENODEV;
>           }
>           printk(KERN_INFO "added silly i2c driver\n");
>           return (res);
>  }
>  module_init(silly_init);
>
>  static void __exit silly_exit(void)
>  {
>           printk(KERN_INFO "remove silly i2c driver.\n");
>           /* reset the silly */
>           i2c_del_driver(&silly_driver);
>  }
>
>  module_exit(silly_exit);
>
> --
> Steve Jardine <sjardine at acm.org>
> _______________________________________________
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> Linux-users at linux-sxs.org
> http://mailman.celestial.com/mailman/listinfo/linux-users



-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                                    netllama at gmail.com
LlamaLand                       https://netllama.linux-sxs.org