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/* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Code Aurora Forum nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* Alternatively, provided that this notice is retained in full, this software
* may be relicensed by the recipient under the terms of the GNU General Public
* License version 2 ("GPL") and only version 2, in which case the provisions of
* the GPL apply INSTEAD OF those given above. If the recipient relicenses the
* software under the GPL, then the identification text in the MODULE_LICENSE
* macro must be changed to reflect "GPLv2" instead of "Dual BSD/GPL". Once a
* recipient changes the license terms to the GPL, subsequent recipients shall
* not relicense under alternate licensing terms, including the BSD or dual
* BSD/GPL terms. In addition, the following license statement immediately
* below and between the words START and END shall also then apply when this
* software is relicensed under the GPL:
*
* START
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 and only version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* END
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* Qualcomm PMIC8058 GPIO driver
*
*/
#include <linux/gpio.h>
#include <linux/mfd/pmic8058.h>
#include "gpio_chip.h"
#define PM8058_GPIO_TO_INT(n) (PMIC8058_IRQ_BASE + (n))
static int pm8058_gpio_configure(struct gpio_chip *chip,
unsigned int gpio,
unsigned long flags)
{
int rc = 0, direction;
gpio -= chip->start;
if (flags & (GPIOF_INPUT | GPIOF_DRIVE_OUTPUT)) {
direction = 0;
if (flags & GPIOF_INPUT)
direction |= PM_GPIO_DIR_IN;
if (flags & GPIOF_DRIVE_OUTPUT)
direction |= PM_GPIO_DIR_OUT;
if (flags & (GPIOF_OUTPUT_LOW | GPIOF_OUTPUT_HIGH)) {
if (flags & GPIOF_OUTPUT_HIGH)
rc = pm8058_gpio_set(gpio, 1);
else
rc = pm8058_gpio_set(gpio, 0);
if (rc) {
pr_err("%s: FAIL pm8058_gpio_set(): rc=%d.\n",
__func__, rc);
goto bail_out;
}
}
rc = pm8058_gpio_set_direction(gpio, direction);
if (rc)
pr_err("%s: FAIL pm8058_gpio_config(): rc=%d.\n",
__func__, rc);
}
bail_out:
return rc;
}
static int pm8058_gpio_get_irq_num(struct gpio_chip *chip,
unsigned int gpio,
unsigned int *irqp,
unsigned long *irqnumflagsp)
{
gpio -= chip->start;
*irqp = PM8058_GPIO_TO_INT(gpio);
if (irqnumflagsp)
*irqnumflagsp = 0;
return 0;
}
static int pm8058_gpio_read(struct gpio_chip *chip, unsigned n)
{
n -= chip->start;
return pm8058_gpio_get(n);
}
static int pm8058_gpio_write(struct gpio_chip *chip, unsigned n, unsigned on)
{
n -= chip->start;
return pm8058_gpio_set(n, on);
}
struct msm_gpio_chip pm8058_gpio_chip = {
.chip = {
.start = NR_GPIO_IRQS,
.end = NR_GPIO_IRQS + NR_PMIC8058_GPIO_IRQS - 1,
.configure = pm8058_gpio_configure,
.get_irq_num = pm8058_gpio_get_irq_num,
.read = pm8058_gpio_read,
.write = pm8058_gpio_write,
}
};
static int __init pm8058_gpio_init(void)
{
int rc;
rc = register_gpio_chip(&pm8058_gpio_chip.chip);
pr_info("%s: register_gpio_chip(): rc=%d\n", __func__, rc);
return rc;
}
device_initcall(pm8058_gpio_init);
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