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v3.15
  1/*
  2 * Access to GPOs on TWL6040 chip
  3 *
  4 * Copyright (C) 2012 Texas Instruments, Inc.
  5 *
  6 * Authors:
  7 *	Sergio Aguirre <saaguirre@ti.com>
  8 *	Peter Ujfalusi <peter.ujfalusi@ti.com>
  9 *
 10 * This program is free software; you can redistribute it and/or modify
 11 * it under the terms of the GNU General Public License as published by
 12 * the Free Software Foundation; either version 2 of the License, or
 13 * (at your option) any later version.
 14 *
 15 * This program is distributed in the hope that it will be useful,
 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18 * GNU General Public License for more details.
 19 *
 20 * You should have received a copy of the GNU General Public License
 21 * along with this program; if not, write to the Free Software
 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 23 */
 24
 25#include <linux/module.h>
 26#include <linux/init.h>
 27#include <linux/kthread.h>
 28#include <linux/irq.h>
 29#include <linux/gpio.h>
 30#include <linux/platform_device.h>
 31#include <linux/of.h>
 32
 33#include <linux/mfd/twl6040.h>
 34
 35static struct gpio_chip twl6040gpo_chip;
 36
 37static int twl6040gpo_get(struct gpio_chip *chip, unsigned offset)
 38{
 39	struct twl6040 *twl6040 = dev_get_drvdata(chip->dev->parent);
 40	int ret = 0;
 41
 42	ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
 43	if (ret < 0)
 44		return ret;
 45
 46	return (ret >> offset) & 1;
 47}
 48
 49static int twl6040gpo_direction_out(struct gpio_chip *chip, unsigned offset,
 50				    int value)
 51{
 52	/* This only drives GPOs, and can't change direction */
 53	return 0;
 54}
 55
 56static void twl6040gpo_set(struct gpio_chip *chip, unsigned offset, int value)
 57{
 58	struct twl6040 *twl6040 = dev_get_drvdata(chip->dev->parent);
 59	int ret;
 60	u8 gpoctl;
 61
 62	ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
 63	if (ret < 0)
 64		return;
 65
 66	if (value)
 67		gpoctl = ret | (1 << offset);
 68	else
 69		gpoctl = ret & ~(1 << offset);
 70
 71	twl6040_reg_write(twl6040, TWL6040_REG_GPOCTL, gpoctl);
 72}
 73
 74static struct gpio_chip twl6040gpo_chip = {
 75	.label			= "twl6040",
 76	.owner			= THIS_MODULE,
 77	.get			= twl6040gpo_get,
 78	.direction_output	= twl6040gpo_direction_out,
 79	.set			= twl6040gpo_set,
 80	.can_sleep		= true,
 81};
 82
 83/*----------------------------------------------------------------------*/
 84
 85static int gpo_twl6040_probe(struct platform_device *pdev)
 86{
 87	struct device *twl6040_core_dev = pdev->dev.parent;
 88	struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev);
 89	int ret;
 90
 91	twl6040gpo_chip.base = -1;
 92
 93	if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0)
 94		twl6040gpo_chip.ngpio = 3; /* twl6040 have 3 GPO */
 95	else
 96		twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */
 97
 98	twl6040gpo_chip.dev = &pdev->dev;
 99#ifdef CONFIG_OF_GPIO
100	twl6040gpo_chip.of_node = twl6040_core_dev->of_node;
101#endif
102
103	ret = gpiochip_add(&twl6040gpo_chip);
104	if (ret < 0) {
105		dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
106		twl6040gpo_chip.ngpio = 0;
107	}
108
109	return ret;
110}
111
112static int gpo_twl6040_remove(struct platform_device *pdev)
113{
114	return gpiochip_remove(&twl6040gpo_chip);
115}
116
117/* Note:  this hardware lives inside an I2C-based multi-function device. */
118MODULE_ALIAS("platform:twl6040-gpo");
119
120static struct platform_driver gpo_twl6040_driver = {
121	.driver = {
122		.name	= "twl6040-gpo",
123		.owner	= THIS_MODULE,
124	},
125	.probe		= gpo_twl6040_probe,
126	.remove		= gpo_twl6040_remove,
127};
128
129module_platform_driver(gpo_twl6040_driver);
130
131MODULE_AUTHOR("Texas Instruments, Inc.");
132MODULE_DESCRIPTION("GPO interface for TWL6040");
133MODULE_LICENSE("GPL");
v4.6
  1/*
  2 * Access to GPOs on TWL6040 chip
  3 *
  4 * Copyright (C) 2012 Texas Instruments, Inc.
  5 *
  6 * Authors:
  7 *	Sergio Aguirre <saaguirre@ti.com>
  8 *	Peter Ujfalusi <peter.ujfalusi@ti.com>
  9 *
 10 * This program is free software; you can redistribute it and/or modify
 11 * it under the terms of the GNU General Public License as published by
 12 * the Free Software Foundation; either version 2 of the License, or
 13 * (at your option) any later version.
 14 *
 15 * This program is distributed in the hope that it will be useful,
 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18 * GNU General Public License for more details.
 19 *
 20 * You should have received a copy of the GNU General Public License
 21 * along with this program; if not, write to the Free Software
 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 23 */
 24
 25#include <linux/module.h>
 26#include <linux/init.h>
 27#include <linux/kthread.h>
 28#include <linux/irq.h>
 29#include <linux/gpio.h>
 30#include <linux/platform_device.h>
 31#include <linux/of.h>
 32
 33#include <linux/mfd/twl6040.h>
 34
 35static struct gpio_chip twl6040gpo_chip;
 36
 37static int twl6040gpo_get(struct gpio_chip *chip, unsigned offset)
 38{
 39	struct twl6040 *twl6040 = dev_get_drvdata(chip->parent->parent);
 40	int ret = 0;
 41
 42	ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
 43	if (ret < 0)
 44		return ret;
 45
 46	return (ret >> offset) & 1;
 47}
 48
 49static int twl6040gpo_direction_out(struct gpio_chip *chip, unsigned offset,
 50				    int value)
 51{
 52	/* This only drives GPOs, and can't change direction */
 53	return 0;
 54}
 55
 56static void twl6040gpo_set(struct gpio_chip *chip, unsigned offset, int value)
 57{
 58	struct twl6040 *twl6040 = dev_get_drvdata(chip->parent->parent);
 59	int ret;
 60	u8 gpoctl;
 61
 62	ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
 63	if (ret < 0)
 64		return;
 65
 66	if (value)
 67		gpoctl = ret | (1 << offset);
 68	else
 69		gpoctl = ret & ~(1 << offset);
 70
 71	twl6040_reg_write(twl6040, TWL6040_REG_GPOCTL, gpoctl);
 72}
 73
 74static struct gpio_chip twl6040gpo_chip = {
 75	.label			= "twl6040",
 76	.owner			= THIS_MODULE,
 77	.get			= twl6040gpo_get,
 78	.direction_output	= twl6040gpo_direction_out,
 79	.set			= twl6040gpo_set,
 80	.can_sleep		= true,
 81};
 82
 83/*----------------------------------------------------------------------*/
 84
 85static int gpo_twl6040_probe(struct platform_device *pdev)
 86{
 87	struct device *twl6040_core_dev = pdev->dev.parent;
 88	struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev);
 89	int ret;
 90
 91	twl6040gpo_chip.base = -1;
 92
 93	if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0)
 94		twl6040gpo_chip.ngpio = 3; /* twl6040 have 3 GPO */
 95	else
 96		twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */
 97
 98	twl6040gpo_chip.parent = &pdev->dev;
 99#ifdef CONFIG_OF_GPIO
100	twl6040gpo_chip.of_node = twl6040_core_dev->of_node;
101#endif
102
103	ret = devm_gpiochip_add_data(&pdev->dev, &twl6040gpo_chip, NULL);
104	if (ret < 0) {
105		dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
106		twl6040gpo_chip.ngpio = 0;
107	}
108
109	return ret;
110}
111
 
 
 
 
 
112/* Note:  this hardware lives inside an I2C-based multi-function device. */
113MODULE_ALIAS("platform:twl6040-gpo");
114
115static struct platform_driver gpo_twl6040_driver = {
116	.driver = {
117		.name	= "twl6040-gpo",
 
118	},
119	.probe		= gpo_twl6040_probe,
 
120};
121
122module_platform_driver(gpo_twl6040_driver);
123
124MODULE_AUTHOR("Texas Instruments, Inc.");
125MODULE_DESCRIPTION("GPO interface for TWL6040");
126MODULE_LICENSE("GPL");