[PATCH] gpio: omap: Fix GPIO numbering for deferred probe

[PATCH] gpio: omap: Fix GPIO numbering for deferred probe

[Tony Lindgren]

If gpio-omap probe fails with -EPROBE_DEFER, the GPIO numbering
keeps increasing. Only increase the gpio count if gpiochip_add()
was successful as otherwise the numbers will increase for each
probe attempt.

Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Javier Martinez Canillas <javier@dowhile0.org>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/gpio/gpio-omap.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1095,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
 	} else {
 		bank->chip.label = "gpio";
 		bank->chip.base = gpio;
-		gpio += bank->width;
 	}
 	bank->chip.ngpio = bank->width;
 
@@ -1105,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
 		return ret;
 	}
 
+	if (!bank->is_mpuio)
+		gpio += bank->width;
+
 #ifdef CONFIG_ARCH_OMAP1
 	/*
 	 * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
-- 
2.1.4

[PATCH] gpio: omap: Fix GPIO numbering for deferred probe

[Grygorii Strashko]

On 09/03/2015 08:31 PM, Tony Lindgren wrote:
> If gpio-omap probe fails with -EPROBE_DEFER, the GPIO numbering
> keeps increasing. Only increase the gpio count if gpiochip_add()
> was successful as otherwise the numbers will increase for each
> probe attempt.
>
> Cc: Grygorii Strashko <grygorii.strashko@ti.com>
> Cc: Javier Martinez Canillas <javier@dowhile0.org>
> Cc: Kevin Hilman <khilman@deeprootsystems.com>
> Cc: Santosh Shilimkar <ssantosh@kernel.org>
> Signed-off-by: Tony Lindgren <tony@atomide.com>
> ---
>   drivers/gpio/gpio-omap.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> --- a/drivers/gpio/gpio-omap.c
> +++ b/drivers/gpio/gpio-omap.c
> @@ -1095,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
>   	} else {
>   		bank->chip.label = "gpio";
>   		bank->chip.base = gpio;
> -		gpio += bank->width;
>   	}
>   	bank->chip.ngpio = bank->width;
>
> @@ -1105,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
>   		return ret;
>   	}
>
> +	if (!bank->is_mpuio)
> +		gpio += bank->width;
> +
>   #ifdef CONFIG_ARCH_OMAP1
>   	/*
>   	 * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
>

Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>

With hope that only GPIO0 will be deferred, otherwise
there will be total mess in gpios enumeration ;)

-- 
regards,
-grygorii

[PATCH] gpio: omap: Fix GPIO numbering for deferred probe

[Tony Lindgren]

* Grygorii Strashko <grygorii.strashko@ti.com> [150904 03:04]:
> On 09/03/2015 08:31 PM, Tony Lindgren wrote:
> >If gpio-omap probe fails with -EPROBE_DEFER, the GPIO numbering
> >keeps increasing. Only increase the gpio count if gpiochip_add()
> >was successful as otherwise the numbers will increase for each
> >probe attempt.
> >
> >Cc: Grygorii Strashko <grygorii.strashko@ti.com>
> >Cc: Javier Martinez Canillas <javier@dowhile0.org>
> >Cc: Kevin Hilman <khilman@deeprootsystems.com>
> >Cc: Santosh Shilimkar <ssantosh@kernel.org>
> >Signed-off-by: Tony Lindgren <tony@atomide.com>
> >---
> >  drivers/gpio/gpio-omap.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> >--- a/drivers/gpio/gpio-omap.c
> >+++ b/drivers/gpio/gpio-omap.c
> >@@ -1095,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
> >  	} else {
> >  		bank->chip.label = "gpio";
> >  		bank->chip.base = gpio;
> >-		gpio += bank->width;
> >  	}
> >  	bank->chip.ngpio = bank->width;
> >
> >@@ -1105,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
> >  		return ret;
> >  	}
> >
> >+	if (!bank->is_mpuio)
> >+		gpio += bank->width;
> >+
> >  #ifdef CONFIG_ARCH_OMAP1
> >  	/*
> >  	 * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
> >
> 
> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
> 
> With hope that only GPIO0 will be deferred, otherwise
> there will be total mess in gpios enumeration ;)

Heh nope :) If pinctrl currently ever causes deferred probe
things will get totally messed up.. Works fine after $subject
patch.

Regards,

Tony

[PATCH] gpio: omap: Fix GPIO numbering for deferred probe

[Linus Walleij]

On Thu, Sep 3, 2015 at 7:31 PM, Tony Lindgren <tony@atomide.com> wrote:

> If gpio-omap probe fails with -EPROBE_DEFER, the GPIO numbering
> keeps increasing. Only increase the gpio count if gpiochip_add()
> was successful as otherwise the numbers will increase for each
> probe attempt.
>
> Cc: Grygorii Strashko <grygorii.strashko@ti.com>
> Cc: Javier Martinez Canillas <javier@dowhile0.org>
> Cc: Kevin Hilman <khilman@deeprootsystems.com>
> Cc: Santosh Shilimkar <ssantosh@kernel.org>
> Signed-off-by: Tony Lindgren <tony@atomide.com>

Patch applied with Grygorii's review tag.

Yours,
Linus Walleij