diff options
| author | Bryan Wu <cooloney@kernel.org> | 2008-11-18 17:48:22 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-11-18 17:48:22 +0800 |
| commit | 397861cd8046549957a04d34a0b97b267cbb9589 (patch) | |
| tree | feb9a74acdf782205e2eef186a86f3141bc84ef3 /arch/blackfin/include | |
| parent | 10a88a2be569002ddbb669278c598d8ee11e2f50 (diff) | |
Blackfin arch: fix bug - gpio_bank() macros messed up bank number caculating with positioning a gpio
The whole story:
Before BF51x merged, all the MAX_BLACKFIN_GPIOS are integral multiple of GPIO_BANKSIZE (= 16).
But BF51x provides MAX_BLACKFIN_GPIOS = 40 which includes 3 banks and the 3rd bank has only 8
GPIO pins.
Therefore, gpio_bank() macros is correct when you try to find a GPIO in which bank (GPIO_35 is
in bank 2). But on BF51x gpio_bank(MAX_BLACKFIN_GPIOS) only gives out 2 banks instead of 3
banks for some static array initialization.
This patch add a new macros gpio_bank_n() and GPIO_BANK_NUM to do bank number caculating and
remain the gpio_bank() macros for positioning a gpio in which bank.
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/include')
| -rw-r--r-- | arch/blackfin/include/asm/gpio.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/gpio.h b/arch/blackfin/include/asm/gpio.h index d8485624006a..2a5e846a5382 100644 --- a/arch/blackfin/include/asm/gpio.h +++ b/arch/blackfin/include/asm/gpio.h @@ -85,10 +85,12 @@ #define __ARCH_BLACKFIN_GPIO_H__ #define gpio_bank(x) ((x) >> 4) +#define gpio_bank_n(x) ((x) & 0xF ? ((x) >> 4) + 1 : (x) >> 4) #define gpio_bit(x) (1<<((x) & 0xF)) #define gpio_sub_n(x) ((x) & 0xF) #define GPIO_BANKSIZE 16 +#define GPIO_BANK_NUM gpio_bank_n(MAX_BLACKFIN_GPIOS) #define GPIO_0 0 #define GPIO_1 1 |