[U-Boot] [PATCH 2/9 v2] i.MX31: add a simple gpio driver

[Anatolij Gustschin <agust@denx.de>]

Hi Guennadi,

Guennadi Liakhovetski wrote:

> diff --git a/drivers/gpio/mx31_gpio.c b/drivers/gpio/mx31_gpio.c
> new file mode 100644
> index 0000000..6487e63
> --- /dev/null
> +++ b/drivers/gpio/mx31_gpio.c
<snip>
> +#include <common.h>
> +#include <asm/arch/mx31.h>
> +#include <asm/arch/mx31-regs.h>
> +
> +/* GPIO port description */
> +static unsigned long gpio_ports[] = {
> +	[0] = 0x53fcc000,
> +	[1] = 0x53fd0000,
> +	[2] = 0x53fa4000,
> +};

Ilya send a patch for mx31 GPIO register definitions today
http://lists.denx.de/pipermail/u-boot/2009-February/046884.html

Could you please provide additional patch for drivers/gpio/mx31_gpio.c
based on Ilya's patch to use these GPIOx_BASE macros here and to
use GPIO_DR / GPIO_GDIR for 0 / 4 below? Thanks!

> +void mx31_gpio_set(unsigned int gpio, unsigned int value)
> +{
> +	unsigned int port = gpio >> 5;
> +	u32 l;
> +
> +	if (port > sizeof(gpio_ports) / sizeof(gpio_ports[0]) - 1)

also please change this one to
	if (port >= ARRAY_SIZE(gpio_ports))
too, to be consistent with coding in this file, Thanks!

> +		return;
> +
> +	gpio &= 0x1f;
> +
> +	l = __REG(gpio_ports[port] + 0);
> +	if (value)
> +		l |= 1 << gpio;
> +	else
> +		l &= ~(1 << gpio);
> +	__REG(gpio_ports[port] + 0) = l;
> +}
> diff --git a/include/asm-arm/arch-mx31/mx31.h b/include/asm-arm/arch-mx31/mx31.h
> index 0552c27..e957d72 100644
> --- a/include/asm-arm/arch-mx31/mx31.h
> +++ b/include/asm-arm/arch-mx31/mx31.h
> @@ -27,4 +27,24 @@
>  extern u32 mx31_get_ipg_clk(void);
>  extern void mx31_gpio_mux(unsigned long mode);
>  
> +enum mx31_gpio_direction {
> +	MX31_GPIO_DIRECTION_IN,
> +	MX31_GPIO_DIRECTION_OUT,
> +};
> +
> +#ifdef CONFIG_MX31_GPIO
> +extern int mx31_gpio_direction(unsigned int gpio,
> +			       enum mx31_gpio_direction direction);
________________________^^^^^^^
please remove spaces here, Thanks!

> +extern void mx31_gpio_set(unsigned int gpio, unsigned int value);
> +#else
> +static inline int mx31_gpio_direction(unsigned int gpio,
> +			       enum mx31_gpio_direction direction)
________________________^^^^^^^
please remove spaces here too, Thanks!

Best regards,
Anatolij