| /* 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 |
