Subject: [PATCH] gpio: omap: Fix regression for MPUIO interrupts

From: [email-masked] (Felipe Balbi)
Date: Fri, 24 Apr 2015 11:10:28 -0500

On Thu, Apr 23, 2015 at 04:54:17PM -0700, Tony Lindgren wrote:
> At some point with all the GPIO clean-up we've broken the
> MPUIO interrupts. Those are just a little bit different from
> the GPIO interrupts, so we can fix it up just by setting
> different irqchip functions for it. And then we can just
> remove all old code trying to do the same.
> 
> Cc: Aaro Koskinen <[email-masked]>
> Cc: Felipe Balbi <[email-masked]>
> Cc: Javier Martinez Canillas <[email-masked]>
> Cc: Grygorii Strashko <[email-masked]>
> Cc: Kevin Hilman <[email-masked]>
> Cc: Nishanth Menon <[email-masked]>
> Cc: Santosh Shilimkar <[email-masked]>
> Signed-off-by: Tony Lindgren <[email-masked]>

Reviewed-by: Felipe Balbi <[email-masked]>

> ---
>  drivers/gpio/gpio-omap.c | 48 +++++++++---------------------------------------
>  1 file changed, 9 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
> index 6553361..b59c3ca 100644
> --- a/drivers/gpio/gpio-omap.c
> +++ b/drivers/gpio/gpio-omap.c
> @@ -1023,38 +1023,8 @@ static void omap_gpio_mod_init(struct gpio_bank *bank)
>  		dev_err(bank->dev, "Could not get gpio dbck\n");
>  }
>  
> -static void
> -omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start,
> -		    unsigned int num)
> -{
> -	struct irq_chip_generic *gc;
> -	struct irq_chip_type *ct;
> -
> -	gc = irq_alloc_generic_chip("MPUIO", 1, irq_start, bank->base,
> -				    handle_simple_irq);
> -	if (!gc) {
> -		dev_err(bank->dev, "Memory alloc failed for gc\n");
> -		return;
> -	}
> -
> -	ct = gc->chip_types;
> -
> -	/* NOTE: No ack required, reading IRQ status clears it. */
> -	ct->chip.irq_mask = irq_gc_mask_set_bit;
> -	ct->chip.irq_unmask = irq_gc_mask_clr_bit;
> -	ct->chip.irq_set_type = omap_gpio_irq_type;
> -
> -	if (bank->regs->wkup_en)
> -		ct->chip.irq_set_wake = omap_gpio_wake_enable;
> -
> -	ct->regs.mask = OMAP_MPUIO_GPIO_INT / bank->stride;
> -	irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
> -			       IRQ_NOREQUEST | IRQ_NOPROBE, 0);
> -}
> -
>  static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
>  {
> -	int j;
>  	static int gpio;
>  	int irq_base = 0;
>  	int ret;
> @@ -1101,6 +1071,15 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
>  	}
>  #endif
>  
> +	/* MPUIO is a bit different, reading IRQ status clears it */
> +	if (bank->is_mpuio) {
> +		irqc->irq_ack = dummy_irq_chip.irq_ack;
> +		irqc->irq_mask = irq_gc_mask_set_bit;
> +		irqc->irq_unmask = irq_gc_mask_clr_bit;
> +		if (!bank->regs->wkup_en)
> +			irqc->irq_set_wake = NULL;
> +	}
> +
>  	ret = gpiochip_irqchip_add(&bank->chip, irqc,
>  				   irq_base, omap_gpio_irq_handler,
>  				   IRQ_TYPE_NONE);
> @@ -1114,15 +1093,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
>  	gpiochip_set_chained_irqchip(&bank->chip, irqc,
>  				     bank->irq, omap_gpio_irq_handler);
>  
> -	for (j = 0; j < bank->width; j++) {
> -		int irq = irq_find_mapping(bank->chip.irqdomain, j);
> -		if (bank->is_mpuio) {
> -			omap_mpuio_alloc_gc(bank, irq, bank->width);
> -			irq_set_chip_and_handler(irq, NULL, NULL);
> -			set_irq_flags(irq, 0);
> -		}
> -	}
> -
>  	return 0;
>  }
>  
> -- 
> 2.1.4
> 

-- 
balbi
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