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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-kirkwood/lacie_v2-common.c
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/*

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 * arch/arm/mach-kirkwood/lacie_v2-common.c

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 *

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 * This file is licensed under the terms of the GNU General Public

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 * License version 2.  This program is licensed "as is" without any

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 * warranty of any kind, whether express or implied.

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 */

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#include <linux/kernel.h>

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#include <linux/init.h>

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#include <linux/mtd/physmap.h>

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#include <linux/spi/flash.h>

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#include <linux/spi/spi.h>

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#include <linux/i2c.h>

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#include <linux/i2c/at24.h>

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#include <linux/gpio.h>

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#include <asm/mach/time.h>

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#include <mach/kirkwood.h>

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#include <mach/irqs.h>

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#include <plat/time.h>

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#include "common.h"

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/*****************************************************************************

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 * 512KB SPI Flash on Boot Device (MACRONIX MX25L4005)

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 ****************************************************************************/

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static struct mtd_partition lacie_v2_flash_parts[] = {

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	{

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		.name = "u-boot",

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		.size = MTDPART_SIZ_FULL,

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		.offset = 0,

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		.mask_flags = MTD_WRITEABLE, /* force read-only */

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	},

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};

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static const struct flash_platform_data lacie_v2_flash = {

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	.type		= "mx25l4005a",

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	.name		= "spi_flash",

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	.parts		= lacie_v2_flash_parts,

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	.nr_parts	= ARRAY_SIZE(lacie_v2_flash_parts),

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};

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static struct spi_board_info __initdata lacie_v2_spi_slave_info[] = {

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	{

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		.modalias	= "m25p80",

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		.platform_data	= &lacie_v2_flash,

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		.irq		= -1,

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		.max_speed_hz	= 20000000,

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		.bus_num	= 0,

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		.chip_select	= 0,

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	},

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};

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void __init lacie_v2_register_flash(void)

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{

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	spi_register_board_info(lacie_v2_spi_slave_info,

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				ARRAY_SIZE(lacie_v2_spi_slave_info));

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	kirkwood_spi_init();

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}

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/*****************************************************************************

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 * I2C devices

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 ****************************************************************************/

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static struct at24_platform_data at24c04 = {

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	.byte_len	= SZ_4K / 8,

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	.page_size	= 16,

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};

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/*

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 * i2c addr | chip         | description

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 * 0x50     | HT24LC04     | eeprom (512B)

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 */

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static struct i2c_board_info __initdata lacie_v2_i2c_info[] = {

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	{

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		I2C_BOARD_INFO("24c04", 0x50),

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		.platform_data  = &at24c04,

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	}

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};

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void __init lacie_v2_register_i2c_devices(void)

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{

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	kirkwood_i2c_init();

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	i2c_register_board_info(0, lacie_v2_i2c_info,

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				ARRAY_SIZE(lacie_v2_i2c_info));

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}

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/*****************************************************************************

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 * Hard Disk power

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 ****************************************************************************/

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static int __initdata lacie_v2_gpio_hdd_power[] = { 16, 17, 41, 42, 43 };

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void __init lacie_v2_hdd_power_init(int hdd_num)

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{

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	int i;

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	int err;

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	/* Power up all hard disks. */

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	for (i = 0; i < hdd_num; i++) {

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		err = gpio_request(lacie_v2_gpio_hdd_power[i], NULL);

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		if (err == 0) {

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			err = gpio_direction_output(

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					lacie_v2_gpio_hdd_power[i], 1);

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			/* Free the HDD power GPIOs. This allow user-space to

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			 * configure them via the gpiolib sysfs interface. */

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			gpio_free(lacie_v2_gpio_hdd_power[i]);

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		}

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		if (err)

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			pr_err("Failed to power up HDD%d\n", i + 1);

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	}

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}

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