| /* | |
| * HTC simple EGPIO irq and gpio extender | |
| */ | |
| #ifndef __HTC_EGPIO_H__ | |
| #define __HTC_EGPIO_H__ | |
| #include <linux/gpio.h> | |
| /* Descriptive values for all-in or all-out htc_egpio_chip descriptors. */ | |
| #define HTC_EGPIO_OUTPUT (~0) | |
| #define HTC_EGPIO_INPUT 0 | |
| /** | |
| * struct htc_egpio_chip - descriptor to create gpio_chip for register range | |
| * @reg_start: index of first register | |
| * @gpio_base: gpio number of first pin in this register range | |
| * @num_gpios: number of gpios in this register range, max BITS_PER_LONG | |
| * (number of registers = DIV_ROUND_UP(num_gpios, reg_width)) | |
| * @direction: bitfield, '0' = input, '1' = output, | |
| */ | |
| struct htc_egpio_chip { | |
| int reg_start; | |
| int gpio_base; | |
| int num_gpios; | |
| unsigned long direction; | |
| unsigned long initial_values; | |
| }; | |
| /** | |
| * struct htc_egpio_platform_data - description provided by the arch | |
| * @irq_base: beginning of available IRQs (eg, IRQ_BOARD_START) | |
| * @num_irqs: number of irqs | |
| * @reg_width: number of bits per register, either 8 or 16 bit | |
| * @bus_width: alignment of the registers, either 16 or 32 bit | |
| * @invert_acks: set if chip requires writing '0' to ack an irq, instead of '1' | |
| * @ack_register: location of the irq/ack register | |
| * @chip: pointer to array of htc_egpio_chip descriptors | |
| * @num_chips: number of egpio chip descriptors | |
| */ | |
| struct htc_egpio_platform_data { | |
| int bus_width; | |
| int reg_width; | |
| int irq_base; | |
| int num_irqs; | |
| int invert_acks; | |
| int ack_register; | |
| struct htc_egpio_chip *chip; | |
| int num_chips; | |
| }; | |
| /* Determine the wakeup irq, to be called during early resume */ | |
| extern int htc_egpio_get_wakeup_irq(struct device *dev); | |
| #endif |