path: root/drivers/gpio/gpio-pca953x.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  PCA953x 4/8/16/24/40 bit I/O ports
 *
 *  Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
 *  Copyright (C) 2007 Marvell International Ltd.
 *
 *  Derived from drivers/i2c/chips/pca9539.c
 */

#include <linux/acpi.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_data/pca953x.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>

#include <asm/unaligned.h>

#define PCA953X_INPUT		0x00
#define PCA953X_OUTPUT		0x01
#define PCA953X_INVERT		0x02
#define PCA953X_DIRECTION	0x03

#define REG_ADDR_MASK		0x3f
#define REG_ADDR_EXT		0x40
#define REG_ADDR_AI		0x80

#define PCA957X_IN		0x00
#define PCA957X_INVRT		0x01
#define PCA957X_BKEN		0x02
#define PCA957X_PUPD		0x03
#define PCA957X_CFG		0x04
#define PCA957X_OUT		0x05
#define PCA957X_MSK		0x06
#define PCA957X_INTS		0x07

#define PCAL953X_OUT_STRENGTH	0x20
#define PCAL953X_IN_LATCH	0x22
#define PCAL953X_PULL_EN	0x23
#define PCAL953X_PULL_SEL	0x24
#define PCAL953X_INT_MASK	0x25
#define PCAL953X_INT_STAT	0x26
#define PCAL953X_OUT_CONF	0x27

#define PCAL6524_INT_EDGE	0x28
#define PCAL6524_INT_CLR	0x2a
#define PCAL6524_IN_STATUS	0x2b
#define PCAL6524_OUT_INDCONF	0x2c
#define PCAL6524_DEBOUNCE	0x2d

#define PCA_GPIO_MASK		0x00FF

#define PCAL_GPIO_MASK		0x1f
#define PCAL_PINCTRL_MASK	0x60

#define PCA_INT			0x0100
#define PCA_PCAL		0x0200
#define PCA_LATCH_INT		(PCA_PCAL | PCA_INT)
#define PCA953X_TYPE		0x1000
#define PCA957X_TYPE		0x2000
#define PCA_TYPE_MASK		0xF000

#define PCA_CHIP_TYPE(x)	((x) & PCA_TYPE_MASK)

static const struct i2c_device_id pca953x_id[] = {
	{ "pca6416", 16 | PCA953X_TYPE | PCA_INT, },
	{ "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
	{ "pca9534", 8  | PCA953X_TYPE | PCA_INT, },
	{ "pca9535", 16 | PCA953X_TYPE | PCA_INT, },
	{ "pca9536", 4  | PCA953X_TYPE, },
	{ "pca9537", 4  | PCA953X_TYPE | PCA_INT, },
	{ "pca9538", 8  | PCA953X_TYPE | PCA_INT, },
	{ "pca9539", 16 | PCA953X_TYPE | PCA_INT, },
	{ "pca9554", 8  | PCA953X_TYPE | PCA_INT, },
	{ "pca9555", 16 | PCA953X_TYPE | PCA_INT, },
	{ "pca9556", 8  | PCA953X_TYPE, },
	{ "pca9557", 8  | PCA953X_TYPE, },
	{ "pca9574", 8  | PCA957X_TYPE | PCA_INT, },
	{ "pca9575", 16 | PCA957X_TYPE | PCA_INT, },
	{ "pca9698", 40 | PCA953X_TYPE, },

	{ "pcal6416", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
	{ "pcal6524", 24 | PCA953X_TYPE | PCA_LATCH_INT, },
	{ "pcal9555a", 16 | PCA953X_TYPE | PCA_LATCH_INT, },

	{ "max7310", 8  | PCA953X_TYPE, },
	{ "max7312", 16 | PCA953X_TYPE | PCA_INT, },
	{ "max7313", 16 | PCA953X_TYPE | PCA_INT, },
	{ "max7315", 8  | PCA953X_TYPE | PCA_INT, },
	{ "max7318", 16 | PCA953X_TYPE | PCA_INT, },
	{ "pca6107", 8  | PCA953X_TYPE | PCA_INT, },
	{ "tca6408", 8  | PCA953X_TYPE | PCA_INT, },
	{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
	{ "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
	{ "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
	{ "tca9554", 8  | PCA953X_TYPE | PCA_INT, },
	{ "xra1202", 8  | PCA953X_TYPE },
	{ }
};
MODULE_DEVICE_TABLE(i2c, pca953x_id);

static const struct acpi_device_id pca953x_acpi_ids[] = {
	{ "INT3491", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
	{ }
};
MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);

#define MAX_BANK 5
#define BANK_SZ 8

#define NBANK(chip) DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ)

struct pca953x_reg_config {
	int direction;
	int output;
	int input;
	int invert;
};

static const struct pca953x_reg_config pca953x_regs = {
	.direction