Re: [PATCH] gpio: do not set up hardware for IRQ_TYPE_NONE
On 04/23/2014 05:50 PM, Linus Walleij wrote: Some GPIO irqchip drivers exploit the irqdomain mapping function to set up the IRQ default type in the hardware, make sure that if we pass IRQ_TYPE_NONE, no hardware setup whatsoever takes place (this should be the norm) until later when the IRQ gets utilized. Cc: Nishanth Menon n...@ti.com Cc: Peter Ujfalusi peter.ujfal...@ti.com Cc: Ezequiel Garcia ezequiel.gar...@free-electrons.com Cc: Javier Martinez Canillas jav...@dowhile0.org Cc: Tony Lindgren t...@atomide.com Cc: Santosh Shilimkar santosh.shilim...@ti.com Cc: linux-omap linux-omap@vger.kernel.org Signed-off-by: Linus Walleij linus.wall...@linaro.org --- TI folks: can you provide a Tested-by tag if this makes your OMAPs work? I am pretty sure the other platforms will be unaffected, if they aren't I will switch them over to react to IRQ_TYPE_DEFAULT. --- drivers/gpio/gpiolib.c | 10 -- 1 file changed, 8 insertions(+), 2 deletions(-) Thanks: Tested-by: Peter Ujfalusi peter.ujfal...@ti.com diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index ee1819fdcf35..97d173e9aa2d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1409,7 +1409,12 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, #else irq_set_noprobe(irq); #endif - irq_set_irq_type(irq, chip-irq_default_type); + /* + * No set-up of the hardware will happen if IRQ_TYPE_NONE + * is passed as default type. + */ + if (chip-irq_default_type != IRQ_TYPE_NONE) + irq_set_irq_type(irq, chip-irq_default_type); return 0; } @@ -1490,7 +1495,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) * @first_irq: if not dynamically assigned, the base (first) IRQ to * allocate gpiochip irqs from * @handler: the irq handler to use (often a predefined irq core function) - * @type: the default type for IRQs on this irqchip + * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE + * to have the core avoid setting up any default type in the hardware. * * This function closely associates a certain irqchip with a certain * gpiochip, providing an irq domain to translate the local IRQs to -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] gpio: do not set up hardware for IRQ_TYPE_NONE
Some GPIO irqchip drivers exploit the irqdomain mapping function to set up the IRQ default type in the hardware, make sure that if we pass IRQ_TYPE_NONE, no hardware setup whatsoever takes place (this should be the norm) until later when the IRQ gets utilized. Cc: Nishanth Menon n...@ti.com Cc: Peter Ujfalusi peter.ujfal...@ti.com Cc: Ezequiel Garcia ezequiel.gar...@free-electrons.com Cc: Javier Martinez Canillas jav...@dowhile0.org Cc: Tony Lindgren t...@atomide.com Cc: Santosh Shilimkar santosh.shilim...@ti.com Cc: linux-omap linux-omap@vger.kernel.org Signed-off-by: Linus Walleij linus.wall...@linaro.org --- TI folks: can you provide a Tested-by tag if this makes your OMAPs work? I am pretty sure the other platforms will be unaffected, if they aren't I will switch them over to react to IRQ_TYPE_DEFAULT. --- drivers/gpio/gpiolib.c | 10 -- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index ee1819fdcf35..97d173e9aa2d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1409,7 +1409,12 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, #else irq_set_noprobe(irq); #endif - irq_set_irq_type(irq, chip-irq_default_type); + /* +* No set-up of the hardware will happen if IRQ_TYPE_NONE +* is passed as default type. +*/ + if (chip-irq_default_type != IRQ_TYPE_NONE) + irq_set_irq_type(irq, chip-irq_default_type); return 0; } @@ -1490,7 +1495,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) * @first_irq: if not dynamically assigned, the base (first) IRQ to * allocate gpiochip irqs from * @handler: the irq handler to use (often a predefined irq core function) - * @type: the default type for IRQs on this irqchip + * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE + * to have the core avoid setting up any default type in the hardware. * * This function closely associates a certain irqchip with a certain * gpiochip, providing an irq domain to translate the local IRQs to -- 1.9.0 -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] gpio: do not set up hardware for IRQ_TYPE_NONE
Hello Linus, On Wed, Apr 23, 2014 at 4:50 PM, Linus Walleij linus.wall...@linaro.org wrote: Some GPIO irqchip drivers exploit the irqdomain mapping function to set up the IRQ default type in the hardware, make sure that if we pass IRQ_TYPE_NONE, no hardware setup whatsoever takes place (this should be the norm) until later when the IRQ gets utilized. Cc: Nishanth Menon n...@ti.com Cc: Peter Ujfalusi peter.ujfal...@ti.com Cc: Ezequiel Garcia ezequiel.gar...@free-electrons.com Cc: Javier Martinez Canillas jav...@dowhile0.org Cc: Tony Lindgren t...@atomide.com Cc: Santosh Shilimkar santosh.shilim...@ti.com Cc: linux-omap linux-omap@vger.kernel.org Signed-off-by: Linus Walleij linus.wall...@linaro.org --- TI folks: can you provide a Tested-by tag if this makes your OMAPs work? I am pretty sure the other platforms will be unaffected, if they aren't I will switch them over to react to IRQ_TYPE_DEFAULT. --- drivers/gpio/gpiolib.c | 10 -- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index ee1819fdcf35..97d173e9aa2d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1409,7 +1409,12 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, #else irq_set_noprobe(irq); #endif - irq_set_irq_type(irq, chip-irq_default_type); + /* +* No set-up of the hardware will happen if IRQ_TYPE_NONE +* is passed as default type. +*/ + if (chip-irq_default_type != IRQ_TYPE_NONE) + irq_set_irq_type(irq, chip-irq_default_type); return 0; } @@ -1490,7 +1495,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) * @first_irq: if not dynamically assigned, the base (first) IRQ to * allocate gpiochip irqs from * @handler: the irq handler to use (often a predefined irq core function) - * @type: the default type for IRQs on this irqchip + * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE + * to have the core avoid setting up any default type in the hardware. * * This function closely associates a certain irqchip with a certain * gpiochip, providing an irq domain to translate the local IRQs to -- 1.9.0 I just tested on my DM3730 IGEPv2 board and GPIO are working correctly (GPIO LED and GPIO IRQ used by the ethernet controller) Thanks a lot for your help! Tested-by: Javier Martinez Canillas jav...@dowhile0.org -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] gpio: do not set up hardware for IRQ_TYPE_NONE
On 04/23/2014 09:50 AM, Linus Walleij wrote: Some GPIO irqchip drivers exploit the irqdomain mapping function to set up the IRQ default type in the hardware, make sure that if we pass IRQ_TYPE_NONE, no hardware setup whatsoever takes place (this should be the norm) until later when the IRQ gets utilized. Cc: Nishanth Menon n...@ti.com Cc: Peter Ujfalusi peter.ujfal...@ti.com Cc: Ezequiel Garcia ezequiel.gar...@free-electrons.com Cc: Javier Martinez Canillas jav...@dowhile0.org Cc: Tony Lindgren t...@atomide.com Cc: Santosh Shilimkar santosh.shilim...@ti.com Cc: linux-omap linux-omap@vger.kernel.org Signed-off-by: Linus Walleij linus.wall...@linaro.org --- TI folks: can you provide a Tested-by tag if this makes your OMAPs work? I am pretty sure the other platforms will be unaffected, if they aren't I will switch them over to react to IRQ_TYPE_DEFAULT. Tested-by: Nishanth Menon n...@ti.com AM335x-sk (which fails to boot previously), now with this patch: http://slexy.org/raw/s20dMOz3ke Discussion thread: http://marc.info/?t=139817273800014r=1w=2 --- drivers/gpio/gpiolib.c | 10 -- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index ee1819fdcf35..97d173e9aa2d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1409,7 +1409,12 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, #else irq_set_noprobe(irq); #endif - irq_set_irq_type(irq, chip-irq_default_type); + /* + * No set-up of the hardware will happen if IRQ_TYPE_NONE + * is passed as default type. + */ + if (chip-irq_default_type != IRQ_TYPE_NONE) + irq_set_irq_type(irq, chip-irq_default_type); return 0; } @@ -1490,7 +1495,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) * @first_irq: if not dynamically assigned, the base (first) IRQ to * allocate gpiochip irqs from * @handler: the irq handler to use (often a predefined irq core function) - * @type: the default type for IRQs on this irqchip + * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE + * to have the core avoid setting up any default type in the hardware. * * This function closely associates a certain irqchip with a certain * gpiochip, providing an irq domain to translate the local IRQs to Acked-by: Nishanth Menon n...@ti.com -- Regards, Nishanth Menon -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
