Re: [PATCH] drivers: PMC MSP71xx GPIO char driver

From: Marc St-Jean
Date: Wed Mar 07 2007 - 18:48:04 EST


Andrew Morton wrote:
> > On Fri, 23 Feb 2007 17:28:19 -0600 Marc St-Jean
> <stjeanma@xxxxxxxxxxxxxx> wrote:
> > [PATCH] drivers: PMC MSP71xx GPIO char driver
> >
> > Patch to add a GPIO char driver for the PMC-Sierra
> > MSP71xx devices.
> >
> > This patch references some platform support files previously
> > submitted to the linux-mips@xxxxxxxxxxxxxx list.
> >

Thanks for the feedback Andrew. I've implemented all your recommendations
other than the kernel thread handling, which I still have to look into.

[...]

>
> > +/* -- Module functions -- */
> > +
> > +static int msp_gpio_blinkthread( void *none )
>
> Why is this a "module function"?

The reason is likely because it's only called by msp_gpio_init so it was
considered part of the module code. I'll move the comment to only cover
msp_gpio_init/exit.

[...]

> > +module_init(msp_gpio_init);
> > +module_exit(msp_gpio_exit);
> > +
> > +EXPORT_SYMBOL(msp_gpio_in);
> > +EXPORT_SYMBOL(msp_gpio_out);
> > +EXPORT_SYMBOL(msp_gpio_mode);
> > +EXPORT_SYMBOL(msp_gpio_blink);
> > +EXPORT_SYMBOL(msp_gpio_noblink);
>
> What uses these exports?

These exports are needed for other drivers compiled as modules can control
the GPIO pins through this driver.

[...]

Marc
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/