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linux/drivers/mfd/wm8350-gpio.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* wm8350-core.c -- Device access for Wolfson WM8350
*
* Copyright 2007, 2008 Wolfson Microelectronics PLC.
*
* Author: Liam Girdwood
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/mfd/wm8350/gpio.h>
#include <linux/mfd/wm8350/pmic.h>
static int gpio_set_dir(struct wm8350 *wm8350, int gpio, int dir)
{
int ret;
wm8350_reg_unlock(wm8350);
if (dir == WM8350_GPIO_DIR_OUT)
ret = wm8350_clear_bits(wm8350,
WM8350_GPIO_CONFIGURATION_I_O,
1 << gpio);
else
ret = wm8350_set_bits(wm8350,
WM8350_GPIO_CONFIGURATION_I_O,
1 << gpio);
wm8350_reg_lock(wm8350);
return ret;
}
static int wm8350_gpio_set_debounce(struct wm8350 *wm8350, int gpio, int db)
{
if (db == WM8350_GPIO_DEBOUNCE_ON)
return wm8350_set_bits(wm8350, WM8350_GPIO_DEBOUNCE,
1 << gpio);
else
return wm8350_clear_bits(wm8350,
WM8350_GPIO_DEBOUNCE, 1 << gpio);
}
static int gpio_set_func(struct wm8350 *wm8350, int gpio, int func)
{
u16 reg;
wm8350_reg_unlock(wm8350);
switch (gpio) {
case 0:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
& ~WM8350_GP0_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
reg | ((func & 0xf) << 0));
break;
case 1:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
& ~WM8350_GP1_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
reg | ((func & 0xf) << 4));
break;
case 2:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
& ~WM8350_GP2_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
reg | ((func & 0xf) << 8));
break;
case 3:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_1)
& ~WM8350_GP3_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_1,
reg | ((func & 0xf) << 12));
break;
case 4:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
& ~WM8350_GP4_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
reg | ((func & 0xf) << 0));
break;
case 5:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
& ~WM8350_GP5_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
reg | ((func & 0xf) << 4));
break;
case 6:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
& ~WM8350_GP6_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
reg | ((func & 0xf) << 8));
break;
case 7:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_2)
& ~WM8350_GP7_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_2,
reg | ((func & 0xf) << 12));
break;
case 8:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
& ~WM8350_GP8_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
reg | ((func & 0xf) << 0));
break;
case 9:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
& ~WM8350_GP9_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
reg | ((func & 0xf) << 4));
break;
case 10:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
& ~WM8350_GP10_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
reg | ((func & 0xf) << 8));
break;
case 11:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_3)
& ~WM8350_GP11_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_3,
reg | ((func & 0xf) << 12));
break;
case 12:
reg = wm8350_reg_read(wm8350, WM8350_GPIO_FUNCTION_SELECT_4)
& ~WM8350_GP12_FN_MASK;
wm8350_reg_write(wm8350, WM8350_GPIO_FUNCTION_SELECT_4,
reg | ((func & 0xf) << 0));
break;
default:
wm8350_reg_lock(wm8350);
return -EINVAL;
}
wm8350_reg_lock(wm8350);
return 0;
}
static int gpio_set_pull_up(struct wm8350 *wm8350, int gpio, int up)
{
if (up)
return wm8350_set_bits(wm8350,
WM8350_GPIO_PIN_PULL_UP_CONTROL,
1 << gpio);
else
return wm8350_clear_bits(wm8350,
WM8350_GPIO_PIN_PULL_UP_CONTROL,
1 << gpio);
}
static int gpio_set_pull_down(struct wm8350 *wm8350, int gpio, int down)
{
if (down)
return wm8350_set_bits(wm8350,
WM8350_GPIO_PULL_DOWN_CONTROL,
1 << gpio);
else
return wm8350_clear_bits(wm8350,
WM8350_GPIO_PULL_DOWN_CONTROL,
1 << gpio);
}
static int gpio_set_polarity(struct wm8350 *wm8350, int gpio, int pol)
{
if (pol == WM8350_GPIO_ACTIVE_HIGH)
return wm8350_set_bits(wm8350,
WM8350_GPIO_PIN_POLARITY_TYPE,
1 << gpio);
else
return wm8350_clear_bits(wm8350,
WM8350_GPIO_PIN_POLARITY_TYPE,
1 << gpio);
}
static int gpio_set_invert(struct wm8350 *wm8350, int gpio, int invert)
{
if (invert == WM8350_GPIO_INVERT_ON)
return wm8350_set_bits(wm8350, WM8350_GPIO_INT_MODE, 1 << gpio);
else
return wm8350_clear_bits(wm8350,
WM8350_GPIO_INT_MODE, 1 << gpio);
}
int wm8350_gpio_config(struct wm8350 *wm8350, int gpio, int dir, int func,
int pol, int pull, int invert, int debounce)
{
/* make sure we never pull up and down at the same time */
if (pull == WM8350_GPIO_PULL_NONE) {
if (gpio_set_pull_up(wm8350, gpio, 0))
goto err;
if (gpio_set_pull_down(wm8350, gpio, 0))
goto err;
} else if (pull == WM8350_GPIO_PULL_UP) {
if (gpio_set_pull_down(wm8350, gpio, 0))
goto err;
if (gpio_set_pull_up(wm8350, gpio, 1))
goto err;
} else if (pull == WM8350_GPIO_PULL_DOWN) {
if (gpio_set_pull_up(wm8350, gpio, 0))
goto err;
if (gpio_set_pull_down(wm8350, gpio, 1))
goto err;
}
if (gpio_set_invert(wm8350, gpio, invert))
goto err;
if (gpio_set_polarity(wm8350, gpio, pol))
goto err;
if (wm8350_gpio_set_debounce(wm8350, gpio, debounce))
goto err;
if (gpio_set_dir(wm8350, gpio, dir))
goto err;
return gpio_set_func(wm8350, gpio, func);
err:
return -EIO;
}
EXPORT_SYMBOL_GPL(wm8350_gpio_config);
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