diff options
Diffstat (limited to 'drivers/gpio/gpio-it87.c')
| -rw-r--r-- | drivers/gpio/gpio-it87.c | 65 |
1 files changed, 32 insertions, 33 deletions
diff --git a/drivers/gpio/gpio-it87.c b/drivers/gpio/gpio-it87.c index 45d29e488dbb..5d677bcfccf2 100644 --- a/drivers/gpio/gpio-it87.c +++ b/drivers/gpio/gpio-it87.c @@ -1,24 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * GPIO interface for IT87xx Super I/O chips * * Author: Diego Elio Pettenò <flameeyes@flameeyes.eu> + * Copyright (c) 2017 Google, Inc. * * Based on it87_wdt.c by Oliver Schuster * gpio-it8761e.c by Denis Turischev * gpio-stmpe.c by Rabin Vincent - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License 2 as published - * by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -30,15 +19,19 @@ #include <linux/errno.h> #include <linux/ioport.h> #include <linux/slab.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> /* Chip Id numbers */ #define NO_DEV_ID 0xffff +#define IT8613_ID 0x8613 #define IT8620_ID 0x8620 #define IT8628_ID 0x8628 +#define IT8718_ID 0x8718 #define IT8728_ID 0x8728 #define IT8732_ID 0x8732 #define IT8761_ID 0x8761 +#define IT8772_ID 0x8772 +#define IT8786_ID 0x8786 /* IO Ports */ #define REG 0x2e @@ -54,13 +47,13 @@ /** * struct it87_gpio - it87-specific GPIO chip - * @chip the underlying gpio_chip structure - * @lock a lock to avoid races between operations - * @io_base base address for gpio ports - * @io_size size of the port rage starting from io_base. - * @output_base Super I/O register address for Output Enable register - * @simple_base Super I/O 'Simple I/O' Enable register - * @simple_size Super IO 'Simple I/O' Enable register size; this is + * @chip: the underlying gpio_chip structure + * @lock: a lock to avoid races between operations + * @io_base: base address for gpio ports + * @io_size: size of the port rage starting from io_base. + * @output_base: Super I/O register address for Output Enable register + * @simple_base: Super I/O 'Simple I/O' Enable register + * @simple_size: Super IO 'Simple I/O' Enable register size; this is * required because IT87xx chips might only provide Simple I/O * switches on a subset of lines, whereas the others keep the * same status all time. @@ -132,14 +125,6 @@ static inline int superio_inw(int reg) return val; } -static inline void superio_outw(int val, int reg) -{ - outb(reg++, REG); - outb(val >> 8, VAL); - outb(reg, REG); - outb(val, VAL); -} - static inline void superio_set_mask(int mask, int reg) { u8 curr_val = superio_inb(reg); @@ -228,8 +213,7 @@ exit: return rc; } -static void it87_gpio_set(struct gpio_chip *chip, - unsigned gpio_num, int val) +static int it87_gpio_set(struct gpio_chip *chip, unsigned int gpio_num, int val) { u8 mask, curr_vals; u16 reg; @@ -243,6 +227,8 @@ static void it87_gpio_set(struct gpio_chip *chip, outb(curr_vals | mask, reg); else outb(curr_vals & ~mask, reg); + + return 0; } static int it87_gpio_direction_out(struct gpio_chip *chip, @@ -264,7 +250,9 @@ static int it87_gpio_direction_out(struct gpio_chip *chip, /* set the output enable bit */ superio_set_mask(mask, group + it87_gpio->output_base); - it87_gpio_set(chip, gpio_num, val); + rc = it87_gpio_set(chip, gpio_num, val); + if (rc) + goto exit; superio_exit(); @@ -304,6 +292,14 @@ static int __init it87_gpio_init(void) it87_gpio->chip = it87_template_chip; switch (chip_type) { + case IT8613_ID: + gpio_ba_reg = 0x62; + it87_gpio->io_size = 8; /* it8613 only needs 6, use 8 for alignment */ + it87_gpio->output_base = 0xc8; + it87_gpio->simple_base = 0xc0; + it87_gpio->simple_size = 6; + it87_gpio->chip.ngpio = 64; /* has 48, use 64 for convenient calc */ + break; case IT8620_ID: case IT8628_ID: gpio_ba_reg = 0x62; @@ -312,8 +308,11 @@ static int __init it87_gpio_init(void) it87_gpio->simple_size = 0; it87_gpio->chip.ngpio = 64; break; + case IT8718_ID: case IT8728_ID: case IT8732_ID: + case IT8772_ID: + case IT8786_ID: gpio_ba_reg = 0x62; it87_gpio->io_size = 8; it87_gpio->output_base = 0xc8; @@ -411,6 +410,6 @@ static void __exit it87_gpio_exit(void) module_init(it87_gpio_init); module_exit(it87_gpio_exit); -MODULE_AUTHOR("Diego Elio Pettenò <flameeyes@flameeyes.eu>"); +MODULE_AUTHOR("Diego Elio Pettenò <flameeyes@flameeyes.eu>"); MODULE_DESCRIPTION("GPIO interface for IT87xx Super I/O chips"); MODULE_LICENSE("GPL"); |