name : gpio-htc-egpio.h /* SPDX-License-Identifier: GPL-2.0 */ /* * HTC simple EGPIO irq and gpio extender */ #ifndef __HTC_EGPIO_H__ #define __HTC_EGPIO_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; }; #endif