^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * TI TPS6586x GPIO driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Laxman dewangan <ldewangan@nvidia.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Based on tps6586x.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (c) 2010 CompuLab Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Mike Rapoport <mike@compulab.co.il>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/tps6586x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* GPIO control registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define TPS6586X_GPIOSET1 0x5d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define TPS6586X_GPIOSET2 0x5e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct tps6586x_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct gpio_chip gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct device *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) uint8_t val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ret = tps6586x_read(tps6586x_gpio->parent, TPS6586X_GPIOSET2, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return !!(val & (1 << offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static void tps6586x_gpio_set(struct gpio_chip *gc, unsigned offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) value << offset, 1 << offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) uint8_t val, mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) tps6586x_gpio_set(gc, offset, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) val = 0x1 << (offset * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) mask = 0x3 << (offset * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) val, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int tps6586x_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return tps6586x_irq_get_virq(tps6586x_gpio->parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) TPS6586X_INT_PLDO_0 + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static int tps6586x_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct tps6586x_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct tps6586x_gpio *tps6586x_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) pdata = dev_get_platdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) tps6586x_gpio = devm_kzalloc(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) sizeof(*tps6586x_gpio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (!tps6586x_gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) tps6586x_gpio->parent = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) tps6586x_gpio->gpio_chip.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) tps6586x_gpio->gpio_chip.label = pdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) tps6586x_gpio->gpio_chip.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) tps6586x_gpio->gpio_chip.ngpio = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) tps6586x_gpio->gpio_chip.can_sleep = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* FIXME: add handling of GPIOs as dedicated inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) tps6586x_gpio->gpio_chip.set = tps6586x_gpio_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) tps6586x_gpio->gpio_chip.get = tps6586x_gpio_get;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) tps6586x_gpio->gpio_chip.to_irq = tps6586x_gpio_to_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #ifdef CONFIG_OF_GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (pdata && pdata->gpio_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) tps6586x_gpio->gpio_chip.base = pdata->gpio_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) tps6586x_gpio->gpio_chip.base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = devm_gpiochip_add_data(&pdev->dev, &tps6586x_gpio->gpio_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) tps6586x_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) platform_set_drvdata(pdev, tps6586x_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static struct platform_driver tps6586x_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .driver.name = "tps6586x-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .probe = tps6586x_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static int __init tps6586x_gpio_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return platform_driver_register(&tps6586x_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) subsys_initcall(tps6586x_gpio_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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