[U-Boot] [PATCH v3 4/4] dm:gpio:mxc add DT support

[Peng Fan <B51431@freescale.com>]

Hi Igor,

Just kindly remind, did you miss this one? Since you ack the other 
patches in this patch set.

On 1/21/2015 7:09 PM, Peng Fan wrote:
> This patch add DT support for mxc gpio driver.
>
> There are one place using CONFIG_OF_CONTROL macro.
> 1. The U_BOOT_DEVICES and mxc_plat array are complied out. To DT,
>     platdata is alloced using calloc, so there is no need to use mxc_plat.
>
> The following situations are tested, and all work fine:
> 1. with DM, without DT
> 2. with DM and DT
> 3. without DM
> Since device tree has not been upstreamed, if want to test this patch.
> The followings need to be done.
>   + pieces of code does not gpio_request when using gpio_direction_xxx and
>     etc, need to request gpio.
>   + move the gpio settings from board_early_init_f to board_init
>   + define CONFIG_DM ,CONFIG_DM_GPIO and CONFIG_OF_CONTROL
>   + Add device tree file and do related configuration in
>     `make ARCH=arm menuconfig`
> These will be done in future patches by step.
>
> Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
> ---
>   drivers/gpio/mxc_gpio.c | 69 +++++++++++++++++++++++++++++++++++++------------
>   1 file changed, 52 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpio/mxc_gpio.c b/drivers/gpio/mxc_gpio.c
> index c52dd19..0766b78 100644
> --- a/drivers/gpio/mxc_gpio.c
> +++ b/drivers/gpio/mxc_gpio.c
> @@ -151,6 +151,9 @@ int gpio_direction_output(unsigned gpio, int value)
>   #endif
>   
>   #ifdef CONFIG_DM_GPIO
> +#include <fdtdec.h>
> +DECLARE_GLOBAL_DATA_PTR;
> +
>   static int mxc_gpio_is_output(struct gpio_regs *regs, int offset)
>   {
>   	u32 val;
> @@ -259,23 +262,6 @@ static const struct dm_gpio_ops gpio_mxc_ops = {
>   	.get_function		= mxc_gpio_get_function,
>   };
>   
> -static const struct mxc_gpio_plat mxc_plat[] = {
> -	{ 0, (struct gpio_regs *)GPIO1_BASE_ADDR },
> -	{ 1, (struct gpio_regs *)GPIO2_BASE_ADDR },
> -	{ 2, (struct gpio_regs *)GPIO3_BASE_ADDR },
> -#if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
> -		defined(CONFIG_MX53) || defined(CONFIG_MX6)
> -	{ 3, (struct gpio_regs *)GPIO4_BASE_ADDR },
> -#endif
> -#if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6)
> -	{ 4, (struct gpio_regs *)GPIO5_BASE_ADDR },
> -	{ 5, (struct gpio_regs *)GPIO6_BASE_ADDR },
> -#endif
> -#if defined(CONFIG_MX53) || defined(CONFIG_MX6)
> -	{ 6, (struct gpio_regs *)GPIO7_BASE_ADDR },
> -#endif
> -};
> -
>   static int mxc_gpio_probe(struct udevice *dev)
>   {
>   	struct mxc_bank_info *bank = dev_get_priv(dev);
> @@ -296,12 +282,60 @@ static int mxc_gpio_probe(struct udevice *dev)
>   	return 0;
>   }
>   
> +static int mxc_gpio_bind(struct udevice *device)
> +{
> +	struct mxc_gpio_plat *plat = device->platdata;
> +	struct gpio_regs *regs;
> +
> +	if (plat)
> +		return 0;
> +
> +	regs = dev_get_addr(device);
> +	if (!regs)
> +		return -ENXIO;
> +
> +	plat = calloc(1, sizeof(*plat));
> +	if (!plat)
> +		return -ENOMEM;
> +
> +	plat->regs = regs;
> +	plat->bank_index = device->req_seq;
> +	device->platdata = plat;
> +
> +	return 0;
> +}
> +
> +static const struct udevice_id mxc_gpio_ids[] = {
> +	{ .compatible = "fsl,imx35-gpio" },
> +	{ }
> +};
> +
>   U_BOOT_DRIVER(gpio_mxc) = {
>   	.name	= "gpio_mxc",
>   	.id	= UCLASS_GPIO,
>   	.ops	= &gpio_mxc_ops,
>   	.probe	= mxc_gpio_probe,
>   	.priv_auto_alloc_size = sizeof(struct mxc_bank_info),
> +	.of_match = mxc_gpio_ids,
> +	.bind	= mxc_gpio_bind,
> +};
> +
> +#ifndef CONFIG_OF_CONTROL
> +static const struct mxc_gpio_plat mxc_plat[] = {
> +	{ 0, (struct gpio_regs *)GPIO1_BASE_ADDR },
> +	{ 1, (struct gpio_regs *)GPIO2_BASE_ADDR },
> +	{ 2, (struct gpio_regs *)GPIO3_BASE_ADDR },
> +#if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
> +		defined(CONFIG_MX53) || defined(CONFIG_MX6)
> +	{ 3, (struct gpio_regs *)GPIO4_BASE_ADDR },
> +#endif
> +#if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6)
> +	{ 4, (struct gpio_regs *)GPIO5_BASE_ADDR },
> +	{ 5, (struct gpio_regs *)GPIO6_BASE_ADDR },
> +#endif
> +#if defined(CONFIG_MX53) || defined(CONFIG_MX6)
> +	{ 6, (struct gpio_regs *)GPIO7_BASE_ADDR },
> +#endif
>   };
>   
>   U_BOOT_DEVICES(mxc_gpios) = {
> @@ -321,3 +355,4 @@ U_BOOT_DEVICES(mxc_gpios) = {
>   #endif
>   };
>   #endif
> +#endif
Thanks,
Peng.