diff options
Diffstat (limited to 'arch/arm/mach-pxa/include/mach/gpio.h')
-rw-r--r-- | arch/arm/mach-pxa/include/mach/gpio.h | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/arch/arm/mach-pxa/include/mach/gpio.h b/arch/arm/mach-pxa/include/mach/gpio.h index 2c538d8c362d..c7ac3d62d34d 100644 --- a/arch/arm/mach-pxa/include/mach/gpio.h +++ b/arch/arm/mach-pxa/include/mach/gpio.h | |||
@@ -56,10 +56,44 @@ static inline void gpio_set_value(unsigned gpio, int value) | |||
56 | } | 56 | } |
57 | } | 57 | } |
58 | 58 | ||
59 | #define gpio_cansleep __gpio_cansleep | 59 | #define gpio_cansleep __gpio_cansleep |
60 | |||
61 | #define gpio_to_irq(gpio) IRQ_GPIO(gpio) | 60 | #define gpio_to_irq(gpio) IRQ_GPIO(gpio) |
62 | #define irq_to_gpio(irq) IRQ_TO_GPIO(irq) | 61 | #define irq_to_gpio(irq) IRQ_TO_GPIO(irq) |
63 | 62 | ||
64 | 63 | ||
64 | #ifdef CONFIG_CPU_PXA26x | ||
65 | /* GPIO86/87/88/89 on PXA26x have their direction bits in GPDR2 inverted, | ||
66 | * as well as their Alternate Function value being '1' for GPIO in GAFRx. | ||
67 | */ | ||
68 | static inline int __gpio_is_inverted(unsigned gpio) | ||
69 | { | ||
70 | return cpu_is_pxa25x() && gpio > 85; | ||
71 | } | ||
72 | #else | ||
73 | static inline int __gpio_is_inverted(unsigned gpio) { return 0; } | ||
74 | #endif | ||
75 | |||
76 | /* | ||
77 | * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate | ||
78 | * function of a GPIO, and GPDRx cannot be altered once configured. It | ||
79 | * is attributed as "occupied" here (I know this terminology isn't | ||
80 | * accurate, you are welcome to propose a better one :-) | ||
81 | */ | ||
82 | static inline int __gpio_is_occupied(unsigned gpio) | ||
83 | { | ||
84 | if (cpu_is_pxa27x() || cpu_is_pxa25x()) { | ||
85 | int af = (GAFR(gpio) >> ((gpio & 0xf) * 2)) & 0x3; | ||
86 | int dir = GPDR(gpio) & GPIO_bit(gpio); | ||
87 | |||
88 | if (__gpio_is_inverted(gpio)) | ||
89 | return af != 1 || dir == 0; | ||
90 | else | ||
91 | return af != 0 || dir != 0; | ||
92 | } else | ||
93 | return GPDR(gpio) & GPIO_bit(gpio); | ||
94 | } | ||
95 | |||
96 | typedef int (*set_wake_t)(unsigned int irq, unsigned int on); | ||
97 | |||
98 | extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn); | ||
65 | #endif | 99 | #endif |