From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/gpio/gpio-tps6586x.c | 120 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 drivers/gpio/gpio-tps6586x.c (limited to 'drivers/gpio/gpio-tps6586x.c') diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c new file mode 100644 index 000000000..c5713524b --- /dev/null +++ b/drivers/gpio/gpio-tps6586x.c @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TI TPS6586x GPIO driver + * + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * Author: Laxman dewangan + * + * Based on tps6586x.c + * Copyright (c) 2010 CompuLab Ltd. + * Mike Rapoport + */ + +#include +#include +#include +#include +#include +#include +#include + +/* GPIO control registers */ +#define TPS6586X_GPIOSET1 0x5d +#define TPS6586X_GPIOSET2 0x5e + +struct tps6586x_gpio { + struct gpio_chip gpio_chip; + struct device *parent; +}; + +static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc); + uint8_t val; + int ret; + + ret = tps6586x_read(tps6586x_gpio->parent, TPS6586X_GPIOSET2, &val); + if (ret) + return ret; + + return !!(val & (1 << offset)); +} + +static void tps6586x_gpio_set(struct gpio_chip *gc, unsigned offset, + int value) +{ + struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc); + + tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET2, + value << offset, 1 << offset); +} + +static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset, + int value) +{ + struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc); + uint8_t val, mask; + + tps6586x_gpio_set(gc, offset, value); + + val = 0x1 << (offset * 2); + mask = 0x3 << (offset * 2); + + return tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET1, + val, mask); +} + +static int tps6586x_gpio_to_irq(struct gpio_chip *gc, unsigned offset) +{ + struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc); + + return tps6586x_irq_get_virq(tps6586x_gpio->parent, + TPS6586X_INT_PLDO_0 + offset); +} + +static int tps6586x_gpio_probe(struct platform_device *pdev) +{ + struct tps6586x_platform_data *pdata; + struct tps6586x_gpio *tps6586x_gpio; + + device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent)); + + pdata = dev_get_platdata(pdev->dev.parent); + tps6586x_gpio = devm_kzalloc(&pdev->dev, + sizeof(*tps6586x_gpio), GFP_KERNEL); + if (!tps6586x_gpio) + return -ENOMEM; + + tps6586x_gpio->parent = pdev->dev.parent; + + tps6586x_gpio->gpio_chip.owner = THIS_MODULE; + tps6586x_gpio->gpio_chip.label = pdev->name; + tps6586x_gpio->gpio_chip.parent = &pdev->dev; + tps6586x_gpio->gpio_chip.ngpio = 4; + tps6586x_gpio->gpio_chip.can_sleep = true; + + /* FIXME: add handling of GPIOs as dedicated inputs */ + tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output; + tps6586x_gpio->gpio_chip.set = tps6586x_gpio_set; + tps6586x_gpio->gpio_chip.get = tps6586x_gpio_get; + tps6586x_gpio->gpio_chip.to_irq = tps6586x_gpio_to_irq; + + if (pdata && pdata->gpio_base) + tps6586x_gpio->gpio_chip.base = pdata->gpio_base; + else + tps6586x_gpio->gpio_chip.base = -1; + + return devm_gpiochip_add_data(&pdev->dev, &tps6586x_gpio->gpio_chip, + tps6586x_gpio); +} + +static struct platform_driver tps6586x_gpio_driver = { + .driver.name = "tps6586x-gpio", + .probe = tps6586x_gpio_probe, +}; + +static int __init tps6586x_gpio_init(void) +{ + return platform_driver_register(&tps6586x_gpio_driver); +} +subsys_initcall(tps6586x_gpio_init); -- cgit v1.2.3