mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
0de6a80de1
The Kconfig currently controlling compilation of this code is: drivers/gpio/Kconfig:config GPIO_MC9S08DZ60 drivers/gpio/Kconfig: bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_i2c_driver() uses the same init level priority as builtin_i2c_driver() the init ordering remains unchanged with this commit. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. We also delete the MODULE_LICENSE tag etc. since all that information is already contained at the top of the file in the comments. Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Wu Guoxing <b39297@freescale.com> Cc: linux-gpio@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/*
|
|
* Copyright 2009-2012 Freescale Semiconductor, Inc. All Rights Reserved.
|
|
*
|
|
* Author: Wu Guoxing <b39297@freescale.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/gpio.h>
|
|
|
|
#define GPIO_GROUP_NUM 2
|
|
#define GPIO_NUM_PER_GROUP 8
|
|
#define GPIO_NUM (GPIO_GROUP_NUM*GPIO_NUM_PER_GROUP)
|
|
|
|
struct mc9s08dz60 {
|
|
struct i2c_client *client;
|
|
struct gpio_chip chip;
|
|
};
|
|
|
|
static void mc9s_gpio_to_reg_and_bit(int offset, u8 *reg, u8 *bit)
|
|
{
|
|
*reg = 0x20 + offset / GPIO_NUM_PER_GROUP;
|
|
*bit = offset % GPIO_NUM_PER_GROUP;
|
|
}
|
|
|
|
static int mc9s08dz60_get_value(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
u8 reg, bit;
|
|
s32 value;
|
|
struct mc9s08dz60 *mc9s = gpiochip_get_data(gc);
|
|
|
|
mc9s_gpio_to_reg_and_bit(offset, ®, &bit);
|
|
value = i2c_smbus_read_byte_data(mc9s->client, reg);
|
|
|
|
return (value >= 0) ? (value >> bit) & 0x1 : 0;
|
|
}
|
|
|
|
static int mc9s08dz60_set(struct mc9s08dz60 *mc9s, unsigned offset, int val)
|
|
{
|
|
u8 reg, bit;
|
|
s32 value;
|
|
|
|
mc9s_gpio_to_reg_and_bit(offset, ®, &bit);
|
|
value = i2c_smbus_read_byte_data(mc9s->client, reg);
|
|
if (value >= 0) {
|
|
if (val)
|
|
value |= 1 << bit;
|
|
else
|
|
value &= ~(1 << bit);
|
|
|
|
return i2c_smbus_write_byte_data(mc9s->client, reg, value);
|
|
} else
|
|
return value;
|
|
|
|
}
|
|
|
|
|
|
static void mc9s08dz60_set_value(struct gpio_chip *gc, unsigned offset, int val)
|
|
{
|
|
struct mc9s08dz60 *mc9s = gpiochip_get_data(gc);
|
|
|
|
mc9s08dz60_set(mc9s, offset, val);
|
|
}
|
|
|
|
static int mc9s08dz60_direction_output(struct gpio_chip *gc,
|
|
unsigned offset, int val)
|
|
{
|
|
struct mc9s08dz60 *mc9s = gpiochip_get_data(gc);
|
|
|
|
return mc9s08dz60_set(mc9s, offset, val);
|
|
}
|
|
|
|
static int mc9s08dz60_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct mc9s08dz60 *mc9s;
|
|
|
|
mc9s = devm_kzalloc(&client->dev, sizeof(*mc9s), GFP_KERNEL);
|
|
if (!mc9s)
|
|
return -ENOMEM;
|
|
|
|
mc9s->chip.label = client->name;
|
|
mc9s->chip.base = -1;
|
|
mc9s->chip.parent = &client->dev;
|
|
mc9s->chip.owner = THIS_MODULE;
|
|
mc9s->chip.ngpio = GPIO_NUM;
|
|
mc9s->chip.can_sleep = true;
|
|
mc9s->chip.get = mc9s08dz60_get_value;
|
|
mc9s->chip.set = mc9s08dz60_set_value;
|
|
mc9s->chip.direction_output = mc9s08dz60_direction_output;
|
|
mc9s->client = client;
|
|
i2c_set_clientdata(client, mc9s);
|
|
|
|
return devm_gpiochip_add_data(&client->dev, &mc9s->chip, mc9s);
|
|
}
|
|
|
|
static const struct i2c_device_id mc9s08dz60_id[] = {
|
|
{"mc9s08dz60", 0},
|
|
{},
|
|
};
|
|
|
|
static struct i2c_driver mc9s08dz60_i2c_driver = {
|
|
.driver = {
|
|
.name = "mc9s08dz60",
|
|
},
|
|
.probe = mc9s08dz60_probe,
|
|
.id_table = mc9s08dz60_id,
|
|
};
|
|
builtin_i2c_driver(mc9s08dz60_i2c_driver);
|