/*
|
* platform_max7315.c: max7315 platform data initialization file
|
*
|
* (C) Copyright 2013 Intel Corporation
|
* Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.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; version 2
|
* of the License.
|
*/
|
|
#include <linux/init.h>
|
#include <linux/gpio.h>
|
#include <linux/i2c.h>
|
#include <linux/platform_data/pca953x.h>
|
#include <asm/intel-mid.h>
|
|
#define MAX7315_NUM 2
|
|
static void __init *max7315_platform_data(void *info)
|
{
|
static struct pca953x_platform_data max7315_pdata[MAX7315_NUM];
|
static int nr;
|
struct pca953x_platform_data *max7315 = &max7315_pdata[nr];
|
struct i2c_board_info *i2c_info = info;
|
int gpio_base, intr;
|
char base_pin_name[SFI_NAME_LEN + 1];
|
char intr_pin_name[SFI_NAME_LEN + 1];
|
|
if (nr == MAX7315_NUM) {
|
pr_err("too many max7315s, we only support %d\n",
|
MAX7315_NUM);
|
return NULL;
|
}
|
/* we have several max7315 on the board, we only need load several
|
* instances of the same pca953x driver to cover them
|
*/
|
strcpy(i2c_info->type, "max7315");
|
if (nr++) {
|
snprintf(base_pin_name, sizeof(base_pin_name),
|
"max7315_%d_base", nr);
|
snprintf(intr_pin_name, sizeof(intr_pin_name),
|
"max7315_%d_int", nr);
|
} else {
|
strcpy(base_pin_name, "max7315_base");
|
strcpy(intr_pin_name, "max7315_int");
|
}
|
|
gpio_base = get_gpio_by_name(base_pin_name);
|
intr = get_gpio_by_name(intr_pin_name);
|
|
if (gpio_base < 0)
|
return NULL;
|
max7315->gpio_base = gpio_base;
|
if (intr != -1) {
|
i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;
|
max7315->irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;
|
} else {
|
i2c_info->irq = -1;
|
max7315->irq_base = -1;
|
}
|
return max7315;
|
}
|
|
static const struct devs_id max7315_dev_id __initconst = {
|
.name = "i2c_max7315",
|
.type = SFI_DEV_TYPE_I2C,
|
.delay = 1,
|
.get_platform_data = &max7315_platform_data,
|
};
|
|
static const struct devs_id max7315_2_dev_id __initconst = {
|
.name = "i2c_max7315_2",
|
.type = SFI_DEV_TYPE_I2C,
|
.delay = 1,
|
.get_platform_data = &max7315_platform_data,
|
};
|
|
sfi_device(max7315_dev_id);
|
sfi_device(max7315_2_dev_id);
|
