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d9d87d90cc
The conversion of all GPIO drivers to using the .set_rv() and .set_multiple_rv() callbacks from struct gpio_chip (which - unlike their predecessors - return an integer and allow the controller drivers to indicate failures to users) is now complete and the legacy ones have been removed. Rename the new callbacks back to their original names in one sweeping change. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Access to GPOs on TWL6040 chip
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*
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* Copyright (C) 2012 Texas Instruments, Inc.
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*
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* Authors:
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* Sergio Aguirre <saaguirre@ti.com>
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* Peter Ujfalusi <peter.ujfalusi@ti.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kthread.h>
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#include <linux/irq.h>
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#include <linux/gpio/driver.h>
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#include <linux/platform_device.h>
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#include <linux/bitops.h>
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#include <linux/of.h>
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#include <linux/mfd/twl6040.h>
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static int twl6040gpo_get(struct gpio_chip *chip, unsigned offset)
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{
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struct twl6040 *twl6040 = gpiochip_get_data(chip);
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int ret = 0;
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ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
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if (ret < 0)
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return ret;
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return !!(ret & BIT(offset));
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}
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static int twl6040gpo_get_direction(struct gpio_chip *chip, unsigned offset)
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{
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return GPIO_LINE_DIRECTION_OUT;
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}
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static int twl6040gpo_set(struct gpio_chip *chip, unsigned int offset,
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int value)
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{
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struct twl6040 *twl6040 = gpiochip_get_data(chip);
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int ret;
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u8 gpoctl;
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ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
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if (ret < 0)
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return ret;
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if (value)
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gpoctl = ret | BIT(offset);
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else
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gpoctl = ret & ~BIT(offset);
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return twl6040_reg_write(twl6040, TWL6040_REG_GPOCTL, gpoctl);
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}
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static int twl6040gpo_direction_out(struct gpio_chip *chip, unsigned int offset,
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int value)
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{
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/* This only drives GPOs, and can't change direction */
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return twl6040gpo_set(chip, offset, value);
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}
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static struct gpio_chip twl6040gpo_chip = {
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.label = "twl6040",
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.owner = THIS_MODULE,
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.get = twl6040gpo_get,
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.direction_output = twl6040gpo_direction_out,
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.get_direction = twl6040gpo_get_direction,
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.set = twl6040gpo_set,
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.can_sleep = true,
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};
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/*----------------------------------------------------------------------*/
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static int gpo_twl6040_probe(struct platform_device *pdev)
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{
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struct device *twl6040_core_dev = pdev->dev.parent;
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struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev);
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int ret;
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device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
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twl6040gpo_chip.base = -1;
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if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0)
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twl6040gpo_chip.ngpio = 3; /* twl6040 have 3 GPO */
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else
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twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */
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twl6040gpo_chip.parent = &pdev->dev;
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ret = devm_gpiochip_add_data(&pdev->dev, &twl6040gpo_chip, twl6040);
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if (ret < 0) {
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dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
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twl6040gpo_chip.ngpio = 0;
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}
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return ret;
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}
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/* Note: this hardware lives inside an I2C-based multi-function device. */
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MODULE_ALIAS("platform:twl6040-gpo");
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static struct platform_driver gpo_twl6040_driver = {
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.driver = {
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.name = "twl6040-gpo",
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},
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.probe = gpo_twl6040_probe,
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};
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module_platform_driver(gpo_twl6040_driver);
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MODULE_AUTHOR("Texas Instruments, Inc.");
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MODULE_DESCRIPTION("GPO interface for TWL6040");
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MODULE_LICENSE("GPL");
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