^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * 74xx MMIO GPIO driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define MMIO_74XX_DIR_IN (0 << 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define MMIO_74XX_DIR_OUT (1 << 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define MMIO_74XX_BIT_CNT(x) ((x) & 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct mmio_74xx_gpio_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct gpio_chip gc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static const struct of_device_id mmio_74xx_gpio_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .compatible = "ti,741g125",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) .data = (const void *)(MMIO_74XX_DIR_IN | 1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .compatible = "ti,742g125",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .data = (const void *)(MMIO_74XX_DIR_IN | 2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .compatible = "ti,74125",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .data = (const void *)(MMIO_74XX_DIR_IN | 4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .compatible = "ti,74365",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .data = (const void *)(MMIO_74XX_DIR_IN | 6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .compatible = "ti,74244",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .data = (const void *)(MMIO_74XX_DIR_IN | 8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .compatible = "ti,741624",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .data = (const void *)(MMIO_74XX_DIR_IN | 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .compatible = "ti,741g74",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .data = (const void *)(MMIO_74XX_DIR_OUT | 1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .compatible = "ti,7474",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .data = (const void *)(MMIO_74XX_DIR_OUT | 2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .compatible = "ti,74175",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .data = (const void *)(MMIO_74XX_DIR_OUT | 4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .compatible = "ti,74174",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .data = (const void *)(MMIO_74XX_DIR_OUT | 6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .compatible = "ti,74273",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .data = (const void *)(MMIO_74XX_DIR_OUT | 8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .compatible = "ti,7416374",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .data = (const void *)(MMIO_74XX_DIR_OUT | 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) MODULE_DEVICE_TABLE(of, mmio_74xx_gpio_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int mmio_74xx_get_direction(struct gpio_chip *gc, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct mmio_74xx_gpio_priv *priv = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (priv->flags & MMIO_74XX_DIR_OUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return GPIO_LINE_DIRECTION_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return GPIO_LINE_DIRECTION_IN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static int mmio_74xx_dir_in(struct gpio_chip *gc, unsigned int gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct mmio_74xx_gpio_priv *priv = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return (priv->flags & MMIO_74XX_DIR_OUT) ? -ENOTSUPP : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static int mmio_74xx_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct mmio_74xx_gpio_priv *priv = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (priv->flags & MMIO_74XX_DIR_OUT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) gc->set(gc, gpio, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return -ENOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int mmio_74xx_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct mmio_74xx_gpio_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) void __iomem *dat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) priv->flags = (uintptr_t)of_device_get_match_data(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) dat = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (IS_ERR(dat))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return PTR_ERR(dat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) err = bgpio_init(&priv->gc, &pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) DIV_ROUND_UP(MMIO_74XX_BIT_CNT(priv->flags), 8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) dat, NULL, NULL, NULL, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) priv->gc.direction_input = mmio_74xx_dir_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) priv->gc.direction_output = mmio_74xx_dir_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) priv->gc.get_direction = mmio_74xx_get_direction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) priv->gc.ngpio = MMIO_74XX_BIT_CNT(priv->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) priv->gc.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) platform_set_drvdata(pdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return devm_gpiochip_add_data(&pdev->dev, &priv->gc, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static struct platform_driver mmio_74xx_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .name = "74xx-mmio-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .of_match_table = mmio_74xx_gpio_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .probe = mmio_74xx_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) module_platform_driver(mmio_74xx_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) MODULE_DESCRIPTION("74xx MMIO GPIO driver");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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