/* * 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);