linux_dsm_epyc7002/arch/mips/alchemy/gpr/platform.c

/*
 * GPR board platform device registration
 *
 * Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>

#include <asm/mach-au1x00/au1000.h>

/*
 * Watchdog
 */
static struct resource gpr_wdt_resource[] = {
	[0] = {
		.start	= 1,
		.end	= 1,
		.name	= "gpr-adm6320-wdt",
		.flags	= IORESOURCE_IRQ,
	}
};

static struct platform_device gpr_wdt_device = {
	.name = "adm6320-wdt",
	.id = 0,
	.num_resources = ARRAY_SIZE(gpr_wdt_resource),
	.resource = gpr_wdt_resource,
};

/*
 * FLASH
 *
 * 0x00000000-0x00200000 : "kernel"
 * 0x00200000-0x00a00000 : "rootfs"
 * 0x01d00000-0x01f00000 : "config"
 * 0x01c00000-0x01d00000 : "yamon"
 * 0x01d00000-0x01d40000 : "yamon env vars"
 * 0x00000000-0x00a00000 : "kernel+rootfs"
 */
static struct mtd_partition gpr_mtd_partitions[] = {
	{
		.name	= "kernel",
		.size	= 0x00200000,
		.offset	= 0,
	},
	{
		.name	= "rootfs",
		.size	= 0x00800000,
		.offset	= MTDPART_OFS_APPEND,
		.mask_flags = MTD_WRITEABLE,
	},
	{
		.name	= "config",
		.size	= 0x00200000,
		.offset	= 0x01d00000,
	},
	{
		.name	= "yamon",
		.size	= 0x00100000,
		.offset	= 0x01c00000,
	},
	{
		.name	= "yamon env vars",
		.size	= 0x00040000,
		.offset	= MTDPART_OFS_APPEND,
	},
	{
		.name	= "kernel+rootfs",
		.size	= 0x00a00000,
		.offset	= 0,
	},
};

static struct physmap_flash_data gpr_flash_data = {
	.width		= 4,
	.nr_parts	= ARRAY_SIZE(gpr_mtd_partitions),
	.parts		= gpr_mtd_partitions,
};

static struct resource gpr_mtd_resource = {
	.start	= 0x1e000000,
	.end	= 0x1fffffff,
	.flags	= IORESOURCE_MEM,
};

static struct platform_device gpr_mtd_device = {
	.name		= "physmap-flash",
	.dev		= {
		.platform_data	= &gpr_flash_data,
	},
	.num_resources	= 1,
	.resource	= &gpr_mtd_resource,
};

/*
 * LEDs
 */
static struct gpio_led gpr_gpio_leds[] = {
	{	/* green */
		.name			= "gpr:green",
		.gpio			= 4,
		.active_low		= 1,
	},
	{	/* red */
		.name			= "gpr:red",
		.gpio			= 5,
		.active_low		= 1,
	}
};

static struct gpio_led_platform_data gpr_led_data = {
	.num_leds = ARRAY_SIZE(gpr_gpio_leds),
	.leds = gpr_gpio_leds,
};

static struct platform_device gpr_led_devices = {
	.name = "leds-gpio",
	.id = -1,
	.dev = {
		.platform_data = &gpr_led_data,
	}
};

/*
 * I2C
 */
static struct i2c_gpio_platform_data gpr_i2c_data = {
	.sda_pin		= 209,
	.sda_is_open_drain	= 1,
	.scl_pin		= 210,
	.scl_is_open_drain	= 1,
	.udelay			= 2,		/* ~100 kHz */
	.timeout		= HZ,
 };

static struct platform_device gpr_i2c_device = {
	.name			= "i2c-gpio",
	.id			= -1,
	.dev.platform_data	= &gpr_i2c_data,
};

static struct i2c_board_info gpr_i2c_info[] __initdata = {
	{
		I2C_BOARD_INFO("lm83", 0x18),
		.type = "lm83"
	}
};

static struct platform_device *gpr_devices[] __initdata = {
	&gpr_wdt_device,
	&gpr_mtd_device,
	&gpr_i2c_device,
	&gpr_led_devices,
};

static int __init gpr_dev_init(void)
{
	i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));

	return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
}
device_initcall(gpr_dev_init);