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// SPDX-License-Identifier: GPL-2.0-only
/*
* platform_max7315.c: max7315 platform data initialization file
*
* (C) Copyright 2013 Intel Corporation
* Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com>
*/
#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);
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