[PATCH 02/02] pxa: extend gpio pins from 128 to 256
Eric Miao
eric.y.miao at gmail.com
Thu Nov 5 08:37:29 EST 2009
On Thu, Nov 5, 2009 at 10:58 AM, Haojian Zhuang
<haojian.zhuang at gmail.com> wrote:
> From 859055136e56e4342ab1869f0050633ab52607e0 Mon Sep 17 00:00:00 2001
> From: Haojian Zhuang <haojian.zhuang at marvell.com>
> Date: Thu, 5 Nov 2009 05:37:26 -0500
> Subject: [PATCH] [ARM] pxa: extend gpio pins from 128 to 256
>
> GPIO pins exceeds 128 pins on PXA935. Extend IRQ GPIO to support it.
> Add new macro mfp256_to_gpio() and PXA935_NR_BUILTIN_GPIO.
>
> Original mfp_to_gpio() and NR_BUILTIN_GPIO isn't changed.
Will this impact the possibility of pxa935 being not able to build with
other pxa?
>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> ---
> arch/arm/mach-pxa/include/mach/gpio.h | 3 ++-
> arch/arm/mach-pxa/include/mach/irqs.h | 2 +-
> arch/arm/mach-pxa/pxa3xx.c | 2 +-
> arch/arm/plat-pxa/include/plat/mfp.h | 3 ++-
> 4 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/mach-pxa/include/mach/gpio.h
> b/arch/arm/mach-pxa/include/mach/gpio.h
> index b024a8b..d08227d 100644
> --- a/arch/arm/mach-pxa/include/mach/gpio.h
> +++ b/arch/arm/mach-pxa/include/mach/gpio.h
> @@ -99,7 +99,8 @@
> #define GAFR(x) GPIO_REG(0x54 + (((x) & 0x70) >> 2))
>
>
> -#define NR_BUILTIN_GPIO 128
> +#define NR_BUILTIN_GPIO 128
> +#define PXA935_NR_BUILTIN_GPIO 256
>
> #define gpio_to_bank(gpio) ((gpio) >> 5)
> #define gpio_to_irq(gpio) IRQ_GPIO(gpio)
> diff --git a/arch/arm/mach-pxa/include/mach/irqs.h
> b/arch/arm/mach-pxa/include/mach/irqs.h
> index 3677a9a..9565b0f 100644
> --- a/arch/arm/mach-pxa/include/mach/irqs.h
> +++ b/arch/arm/mach-pxa/include/mach/irqs.h
> @@ -106,7 +106,7 @@
> #endif
>
> #define PXA_GPIO_IRQ_BASE PXA_IRQ(96)
> -#define PXA_GPIO_IRQ_NUM (192)
> +#define PXA_GPIO_IRQ_NUM (256)
>
> #define GPIO_2_x_TO_IRQ(x) (PXA_GPIO_IRQ_BASE + (x))
> #define IRQ_GPIO(x) (((x) < 2) ? (IRQ_GPIO0 + (x)) : GPIO_2_x_TO_IRQ(x))
> diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
> index 09b7b1a..7783ac9 100644
> --- a/arch/arm/mach-pxa/pxa3xx.c
> +++ b/arch/arm/mach-pxa/pxa3xx.c
> @@ -539,7 +539,7 @@ void __init pxa3xx_init_irq(void)
> __asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));
>
> pxa_init_irq(56, pxa3xx_set_wake);
> - pxa_init_gpio(IRQ_GPIO_2_x, 2, 127, NULL);
> + pxa_init_gpio(IRQ_GPIO_2_x, 2, 255, NULL);
This isn't ideal, provided on most pxa3xx there are less than 127 GPIOs.
I'd suggest we invent pxa935_init_irq() to support IRQs more than 56,
and more GPIOs, possibly in pxa930.c (and renaming that to pxa93x.c
sounds reasonable then).
> }
>
> /*
> diff --git a/arch/arm/plat-pxa/include/plat/mfp.h
> b/arch/arm/plat-pxa/include/plat/mfp.h
> index 22086e6..66a0295 100644
> --- a/arch/arm/plat-pxa/include/plat/mfp.h
> +++ b/arch/arm/plat-pxa/include/plat/mfp.h
> @@ -16,7 +16,8 @@
> #ifndef __ASM_PLAT_MFP_H
> #define __ASM_PLAT_MFP_H
>
> -#define mfp_to_gpio(m) ((m) % 128)
> +#define mfp_to_gpio(m) ((m) % 128)
Giving that the MFP_PIN_GPIO* has been extended beyond 128, this
macro is already wrong. (e.g. mfp_to_gpio(MFP_PIN_GPIO130) == 2??)
> +#define mfp256_to_gpio(m) ((m) % 256) /* GPIO is more than 128 */
>
> /* list of all the configurable MFP pins */
> enum {
> --
> 1.5.6.5
>
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