Re: [PATCH 2/3 v2] gpio: Add support for Intel ICHx/3100/Series[56] GPIO

[Aaron Sierra]

> > +static int ichx_write_bit(int reg, unsigned nr, int val, int
> > verify)
> > +{
> > +	unsigned long flags;
> > +	u32 data, tmp;
> > +	int reg_nr = nr / 32;
> > +	int bit = nr & 0x1f;
> > +	int ret = 0;
> > +
> > +	spin_lock_irqsave(&ichx_priv.lock, flags);
> > +
> > +	data = ICHX_READ(ichx_regs[reg][reg_nr], ichx_priv.gpio_base);
> > +	data = (data & ~(1 << bit)) | (val << bit);
> 
> I posted a fix for this function last Sunday:
> 
> Subject: [PATCH] gpio-ich: Fix setting GPIO value
> Date: Sun, 5 Feb 2012 21:44:44 +0100
> 
> Please apply it, otherwise your driver doesn't implement the gpio
> driver API properly and code running on top of it (consumer drivers)
> may fail.
> 

Jean,
Thanks for the reminder and for the patch. I have applied it to my tree.

-Aaron

> > +	ICHX_WRITE(data, ichx_regs[reg][reg_nr], ichx_priv.gpio_base);
> > +	tmp = ICHX_READ(ichx_regs[reg][reg_nr], ichx_priv.gpio_base);
> > +	if (verify && (data != tmp))
> > +		ret = -EPERM;
> > +
> > +	spin_unlock_irqrestore(&ichx_priv.lock, flags);
> > +
> > +	return ret;
> > +}
> 
> --
> Jean Delvare
> 
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