[U-Boot] [PATCH 2/3] Exynos5422: Add support for Exynos5422

[Lukasz Majewski <l.majewski@samsung.com>]

Hi Hyungwon,

> This patch adds support for Exynos5422 including GPIO, clock,
> pinmux, and cpu id.
> 
> Change-Id: Ic609973ab531e2b6ee9a68cfec0b6b9571f203a8
> Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
> ---
>  arch/arm/include/asm/arch-exynos/gpio.h | 31
> +++++++++++++++++++++++++++++--
> drivers/gpio/s5p_gpio.c                 |  4 +++- 2 files changed, 32
> insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm/include/asm/arch-exynos/gpio.h
> b/arch/arm/include/asm/arch-exynos/gpio.h index 431ae3a..8f82ef0
> 100644 --- a/arch/arm/include/asm/arch-exynos/gpio.h
> +++ b/arch/arm/include/asm/arch-exynos/gpio.h
> @@ -1368,11 +1368,21 @@ static struct gpio_info
> exynos5420_gpio_data[EXYNOS5420_GPIO_NUM_PARTS] =
> { { EXYNOS5420_GPIO_PART5_BASE, EXYNOS5420_GPIO_MAX_PORT }, };
>  
> +#define EXYNOS5800_GPIO_NUM_PARTS	4
> +static struct gpio_info
> exynos5800_gpio_data[EXYNOS5800_GPIO_NUM_PARTS] = {
> +	{ EXYNOS5420_GPIO_PART1_BASE,
> EXYNOS5420_GPIO_MAX_PORT_PART_1 },
> +	{ EXYNOS5420_GPIO_PART2_BASE,
> EXYNOS5420_GPIO_MAX_PORT_PART_2 },
> +	{ EXYNOS5420_GPIO_PART3_BASE,
> EXYNOS5420_GPIO_MAX_PORT_PART_3 },
> +	{ EXYNOS5420_GPIO_PART4_BASE,
> EXYNOS5420_GPIO_MAX_PORT_PART_4 }, +};
> +
>  static inline struct gpio_info *get_gpio_data(void)
>  {
>  	if (cpu_is_exynos5()) {
> -		if (proid_is_exynos5420() || proid_is_exynos5800())
> +		if (proid_is_exynos5420())
>  			return exynos5420_gpio_data;
> +		else if (proid_is_exynos5800())
> +			return exynos5800_gpio_data;
>  		else
>  			return exynos5_gpio_data;
>  	} else if (cpu_is_exynos4()) {
> @@ -1388,8 +1398,10 @@ static inline struct gpio_info
> *get_gpio_data(void) static inline unsigned int get_bank_num(void)
>  {
>  	if (cpu_is_exynos5()) {
> -		if (proid_is_exynos5420() || proid_is_exynos5800())
> +		if (proid_is_exynos5420())
>  			return EXYNOS5420_GPIO_NUM_PARTS;
> +		if (proid_is_exynos5800())
> +			return EXYNOS5800_GPIO_NUM_PARTS;
>  		else
>  			return EXYNOS5_GPIO_NUM_PARTS;
>  	} else if (cpu_is_exynos4()) {
> @@ -1493,6 +1505,21 @@ static const struct gpio_name_num_table
> exynos5420_gpio_table[] = { { 0 }
>  };
>  
> +static const struct gpio_name_num_table exynos5800_gpio_table[] = {
> +	GPIO_ENTRY('x', EXYNOS5420_GPIO_X00, EXYNOS5420_GPIO_C00, 0),
> +	GPIO_ENTRY('c', EXYNOS5420_GPIO_C00, EXYNOS5420_GPIO_D10, 0),
> +	GPIO_ENTRY('d', EXYNOS5420_GPIO_D10, EXYNOS5420_GPIO_Y00, 0),
> +	GPIO_ENTRY('y', EXYNOS5420_GPIO_Y00, EXYNOS5420_GPIO_E00, 0),
> +	GPIO_ENTRY('e', EXYNOS5420_GPIO_E00, EXYNOS5420_GPIO_F00, 0),
> +	GPIO_ENTRY('f', EXYNOS5420_GPIO_F00, EXYNOS5420_GPIO_G00, 0),
> +	GPIO_ENTRY('g', EXYNOS5420_GPIO_G00, EXYNOS5420_GPIO_J40, 0),
> +	GPIO_ENTRY('j', EXYNOS5420_GPIO_J40, EXYNOS5420_GPIO_A00, 0),
> +	GPIO_ENTRY('a', EXYNOS5420_GPIO_A00, EXYNOS5420_GPIO_B00, 0),
> +	GPIO_ENTRY('b', EXYNOS5420_GPIO_B00, EXYNOS5420_GPIO_H00, 0),
> +	GPIO_ENTRY('h', EXYNOS5420_GPIO_H00, EXYNOS5420_GPIO_Z0, 0),
> +	{ 0 }
> +};
> +
>  void gpio_cfg_pin(int gpio, int cfg);
>  void gpio_set_pull(int gpio, int mode);
>  void gpio_set_drv(int gpio, int mode);
> diff --git a/drivers/gpio/s5p_gpio.c b/drivers/gpio/s5p_gpio.c
> index bcf44eb..bed7cd7 100644
> --- a/drivers/gpio/s5p_gpio.c
> +++ b/drivers/gpio/s5p_gpio.c
> @@ -57,11 +57,13 @@ static inline int s5p_name_to_gpio(const char
> *name) */
>  #if defined(CONFIG_EXYNOS4) || defined(CONFIG_EXYNOS5)
>  	if (cpu_is_exynos5()) {
> -		if (proid_is_exynos5420() || proid_is_exynos5800()) {
> +		if (proid_is_exynos5420()) {
>  			tabp = exynos5420_gpio_table;
>  			irregular_bank_name = 'y';
>  			irregular_set_number = '7';
>  			irregular_bank_base = EXYNOS5420_GPIO_Y70;
> +		} else if (proid_is_exynos5800()) {
> +			tabp = exynos5800_gpio_table;
>  		} else {
>  			tabp = exynos5_gpio_table;
>  			irregular_bank_name = 'c';

I'm a bit confused here. 

We already support exynos5420 in the mainline. It only slightly
differs from Exynos5422. Additionally there is Exynos5800 which is a
different HW revision of Exynos5422. 

In the message topic you stated that you add support for Exynos5422.
Maybe we could use Exynos5800 name also for Exynos5422 (with a big,
fat note about those two chips compliance added to ./doc directory)?

@ Akshay, Minkyu:

What do you think about this idea?

-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group