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

   1 /*
   2  * arch/arm/mach-kirkwood/lacie_v2-common.c
   3  *
   4  * This file is licensed under the terms of the GNU General Public
   5  * License version 2.  This program is licensed "as is" without any
   6  * warranty of any kind, whether express or implied.
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/mtd/physmap.h>
  12 #include <linux/spi/flash.h>
  13 #include <linux/spi/spi.h>
  14 #include <linux/i2c.h>
  15 #include <linux/i2c/at24.h>
  16 #include <linux/gpio.h>
  17 #include <asm/mach/time.h>
  18 #include <mach/kirkwood.h>
  19 #include <mach/irqs.h>
  20 #include <plat/time.h>
  21 #include "common.h"
  22
  23 /*****************************************************************************
  24  * 512KB SPI Flash on Boot Device (MACRONIX MX25L4005)
  25  ****************************************************************************/
  26
  27 static struct mtd_partition lacie_v2_flash_parts[] = {
  28         {
  29                 .name = "u-boot",
  30                 .size = MTDPART_SIZ_FULL,
  31                 .offset = 0,
  32                 .mask_flags = MTD_WRITEABLE, /* force read-only */
  33         },
  34 };
  35
  36 static const struct flash_platform_data lacie_v2_flash = {
  37         .type           = "mx25l4005a",
  38         .name           = "spi_flash",
  39         .parts          = lacie_v2_flash_parts,
  40         .nr_parts       = ARRAY_SIZE(lacie_v2_flash_parts),
  41 };
  42
  43 static struct spi_board_info __initdata lacie_v2_spi_slave_info[] = {
  44         {
  45                 .modalias       = "m25p80",
  46                 .platform_data  = &lacie_v2_flash,
  47                 .irq            = -1,
  48                 .max_speed_hz   = 20000000,
  49                 .bus_num        = 0,
  50                 .chip_select    = 0,
  51         },
  52 };
  53
  54 void __init lacie_v2_register_flash(void)
  55 {
  56         spi_register_board_info(lacie_v2_spi_slave_info,
  57                                 ARRAY_SIZE(lacie_v2_spi_slave_info));
  58         kirkwood_spi_init();
  59 }
  60
  61 /*****************************************************************************
  62  * I2C devices
  63  ****************************************************************************/
  64
  65 static struct at24_platform_data at24c04 = {
  66         .byte_len       = SZ_4K / 8,
  67         .page_size      = 16,
  68 };
  69
  70 /*
  71  * i2c addr | chip         | description
  72  * 0x50     | HT24LC04     | eeprom (512B)
  73  */
  74
  75 static struct i2c_board_info __initdata lacie_v2_i2c_info[] = {
  76         {
  77                 I2C_BOARD_INFO("24c04", 0x50),
  78                 .platform_data  = &at24c04,
  79         }
  80 };
  81
  82 void __init lacie_v2_register_i2c_devices(void)
  83 {
  84         kirkwood_i2c_init();
  85         i2c_register_board_info(0, lacie_v2_i2c_info,
  86                                 ARRAY_SIZE(lacie_v2_i2c_info));
  87 }
  88
  89 /*****************************************************************************
  90  * Hard Disk power
  91  ****************************************************************************/
  92
  93 static int __initdata lacie_v2_gpio_hdd_power[] = { 16, 17, 41, 42, 43 };
  94
  95 void __init lacie_v2_hdd_power_init(int hdd_num)
  96 {
  97         int i;
  98         int err;
  99
 100         /* Power up all hard disks. */
 101         for (i = 0; i < hdd_num; i++) {
 102                 err = gpio_request(lacie_v2_gpio_hdd_power[i], NULL);
 103                 if (err == 0) {
 104                         err = gpio_direction_output(
 105                                         lacie_v2_gpio_hdd_power[i], 1);
 106                         /* Free the HDD power GPIOs. This allow user-space to
 107                          * configure them via the gpiolib sysfs interface. */
 108                         gpio_free(lacie_v2_gpio_hdd_power[i]);
 109                 }
 110                 if (err)
 111                         pr_err("Failed to power up HDD%d\n", i + 1);
 112         }
 113 }