Eunki Kim wrote:
>
> When a device uses GPIO interrupt, its driver assumes that GPIO
> should be INPUT mode. However, GPIO of SAMSUNG SoC is sepated to
> INPUT mode and INTERRUPT mode. They are set by 0x0 and 0xF in GPIO
> control register. If the register is set to INPUT mode, the
> interrupt never occur. Therefore, it's necessary to set INTERRUPT
> mode instead of INPUT mode when the pin is used for GPIO interrupt.
>
> This patch inserts the bitmap_gpio_int member in struct samsung_
> gpio_chip in order to represent use of GPIO interrupt for each pin
> and sets the related bit when s5p_register_gpio_interrupt function
> is called.
>
> Signed-off-by: Eunki Kim <eunki_...@samsung.com>
> Cc: Grant Likely <grant.lik...@secretlab.ca>
> Cc: Linus Walleij <linus.wall...@linaro.org>
> ---
> arch/arm/plat-samsung/include/plat/gpio-core.h | 2 ++
> arch/arm/plat-samsung/s5p-irq-gpioint.c | 8 ++++++--
> 2 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/plat-samsung/include/plat/gpio-core.h
> b/arch/arm/plat-samsung/include/plat/gpio-core.h
> index 1fe6917..dfd8b7a 100644
> --- a/arch/arm/plat-samsung/include/plat/gpio-core.h
> +++ b/arch/arm/plat-samsung/include/plat/gpio-core.h
> @@ -48,6 +48,7 @@ struct samsung_gpio_cfg;
> * @config: special function and pull-resistor control information.
> * @lock: Lock for exclusive access to this gpio bank.
> * @pm_save: Save information for suspend/resume support.
> + * @bitmap_gpio_int: Bitmap for representing GPIO interrupt or not.
> *
> * This wrapper provides the necessary information for the Samsung
> * specific gpios being registered with gpiolib.
> @@ -71,6 +72,7 @@ struct samsung_gpio_chip {
> #ifdef CONFIG_PM
> u32 pm_save[4];
> #endif
> + u32 bitmap_gpio_int;
> };
>
> static inline struct samsung_gpio_chip *to_samsung_gpio(struct gpio_chip
> *gpc)
> diff --git a/arch/arm/plat-samsung/s5p-irq-gpioint.c b/arch/arm/plat-
> samsung/s5p-irq-gpioint.c
> index f9431fe..d981c61 100644
> --- a/arch/arm/plat-samsung/s5p-irq-gpioint.c
> +++ b/arch/arm/plat-samsung/s5p-irq-gpioint.c
> @@ -185,7 +185,7 @@ int __init s5p_register_gpio_interrupt(int pin)
>
> /* check if the group has been already registered */
> if (my_chip->irq_base)
> - return my_chip->irq_base + offset;
> + goto success;
>
> /* register gpio group */
> ret = s5p_gpioint_add(my_chip);
> @@ -193,9 +193,13 @@ int __init s5p_register_gpio_interrupt(int pin)
> my_chip->chip.to_irq = samsung_gpiolib_to_irq;
> printk(KERN_INFO "Registered interrupt support for gpio
> group %d.\n",
> group);
> - return my_chip->irq_base + offset;
> + goto success;
> }
> return ret;
> +success:
> + my_chip->bitmap_gpio_int |= BIT(offset);
> +
> + return my_chip->irq_base + offset;
> }
>
> int __init s5p_register_gpioint_bank(int chain_irq, int start, int
> nr_groups)
> --
> 1.7.1
OK, applied.
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene....@samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
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