1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * HTC simple EGPIO irq and gpio extender 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun #ifndef __HTC_EGPIO_H__ 7*4882a593Smuzhiyun #define __HTC_EGPIO_H__ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun /* Descriptive values for all-in or all-out htc_egpio_chip descriptors. */ 10*4882a593Smuzhiyun #define HTC_EGPIO_OUTPUT (~0) 11*4882a593Smuzhiyun #define HTC_EGPIO_INPUT 0 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun /** 14*4882a593Smuzhiyun * struct htc_egpio_chip - descriptor to create gpio_chip for register range 15*4882a593Smuzhiyun * @reg_start: index of first register 16*4882a593Smuzhiyun * @gpio_base: gpio number of first pin in this register range 17*4882a593Smuzhiyun * @num_gpios: number of gpios in this register range, max BITS_PER_LONG 18*4882a593Smuzhiyun * (number of registers = DIV_ROUND_UP(num_gpios, reg_width)) 19*4882a593Smuzhiyun * @direction: bitfield, '0' = input, '1' = output, 20*4882a593Smuzhiyun */ 21*4882a593Smuzhiyun struct htc_egpio_chip { 22*4882a593Smuzhiyun int reg_start; 23*4882a593Smuzhiyun int gpio_base; 24*4882a593Smuzhiyun int num_gpios; 25*4882a593Smuzhiyun unsigned long direction; 26*4882a593Smuzhiyun unsigned long initial_values; 27*4882a593Smuzhiyun }; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /** 30*4882a593Smuzhiyun * struct htc_egpio_platform_data - description provided by the arch 31*4882a593Smuzhiyun * @irq_base: beginning of available IRQs (eg, IRQ_BOARD_START) 32*4882a593Smuzhiyun * @num_irqs: number of irqs 33*4882a593Smuzhiyun * @reg_width: number of bits per register, either 8 or 16 bit 34*4882a593Smuzhiyun * @bus_width: alignment of the registers, either 16 or 32 bit 35*4882a593Smuzhiyun * @invert_acks: set if chip requires writing '0' to ack an irq, instead of '1' 36*4882a593Smuzhiyun * @ack_register: location of the irq/ack register 37*4882a593Smuzhiyun * @chip: pointer to array of htc_egpio_chip descriptors 38*4882a593Smuzhiyun * @num_chips: number of egpio chip descriptors 39*4882a593Smuzhiyun */ 40*4882a593Smuzhiyun struct htc_egpio_platform_data { 41*4882a593Smuzhiyun int bus_width; 42*4882a593Smuzhiyun int reg_width; 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun int irq_base; 45*4882a593Smuzhiyun int num_irqs; 46*4882a593Smuzhiyun int invert_acks; 47*4882a593Smuzhiyun int ack_register; 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun struct htc_egpio_chip *chip; 50*4882a593Smuzhiyun int num_chips; 51*4882a593Smuzhiyun }; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #endif 54