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gpio:fix: Proper handling of GPIO subsystem parts at Samsung devices

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Now proper GPIO parts numbering is handled at Samsung devices.
This fix is necessary for code using GPIO located at other banks
than first.

Test HW:
- Exynos4210 - Trats
- S5PC110 - goni

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Łukasz Majewski 2012-09-04 21:47:46 +00:00 committed by Minkyu Kang
parent ccfa398547
commit 822593f028
3 changed files with 29 additions and 3 deletions
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19
arch/arm/include/asm/arch-exynos/gpio.h
View file

@ -207,6 +207,25 @@ static inline unsigned int s5p_gpio_base(int nr)
return 0;
}
static inline unsigned int s5p_gpio_part_max(int nr)
{
if (cpu_is_exynos5()) {
if (nr < EXYNOS5_GPIO_PART1_MAX)
return 0;
else if (nr < EXYNOS5_GPIO_PART2_MAX)
return EXYNOS5_GPIO_PART1_MAX;
else
return EXYNOS5_GPIO_PART2_MAX;
} else if (cpu_is_exynos4()) {
if (nr < EXYNOS4_GPIO_PART1_MAX)
return 0;
else
return EXYNOS4_GPIO_PART1_MAX;
}
return 0;
}
#endif
/* Pin configurations */

7
arch/arm/include/asm/arch-s5pc1xx/gpio.h
View file

@ -143,7 +143,12 @@ static inline unsigned int s5p_gpio_base(int nr)
return S5PC110_GPIO_BASE;
}
#define s5pc110_gpio_get_nr(bank, pin) \
static inline unsigned int s5p_gpio_part_max(int nr)
{
return 0;
}
#define s5pc110_gpio_get_nr(bank, pin) \
((((((unsigned int)&(((struct s5pc110_gpio *)S5PC110_GPIO_BASE)->bank))\
- S5PC110_GPIO_BASE) / sizeof(struct s5p_gpio_bank)) \
* GPIO_PER_BANK) + pin)

6
drivers/gpio/s5p_gpio.c
View file

@ -144,9 +144,11 @@ void s5p_gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode)
struct s5p_gpio_bank *s5p_gpio_get_bank(unsigned gpio)
{
int bank = gpio / GPIO_PER_BANK;
bank *= sizeof(struct s5p_gpio_bank);
int bank;
unsigned g = gpio - s5p_gpio_part_max(gpio);
bank = g / GPIO_PER_BANK;
bank *= sizeof(struct s5p_gpio_bank);
return (struct s5p_gpio_bank *) (s5p_gpio_base(gpio) + bank);
}