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 #include "lacie_v2-common.h"
  23
  24 /*****************************************************************************
  25  * 512KB SPI Flash on Boot Device (MACRONIX MX25L4005)
  26  ****************************************************************************/
  27
  28 static struct mtd_partition lacie_v2_flash_parts[] = {
  29         {
  30                 .name = "u-boot",
  31                 .size = MTDPART_SIZ_FULL,
  32                 .offset = 0,
  33                 .mask_flags = MTD_WRITEABLE, /* force read-only */
  34         },
  35 };
  36
  37 static const struct flash_platform_data lacie_v2_flash = {
  38         .type           = "mx25l4005a",
  39         .name           = "spi_flash",
  40         .parts          = lacie_v2_flash_parts,
  41         .nr_parts       = ARRAY_SIZE(lacie_v2_flash_parts),
  42 };
  43
  44 static struct spi_board_info __initdata lacie_v2_spi_slave_info[] = {
  45         {
  46                 .modalias       = "m25p80",
  47                 .platform_data  = &lacie_v2_flash,
  48                 .irq            = -1,
  49                 .max_speed_hz   = 20000000,
  50                 .bus_num        = 0,
  51                 .chip_select    = 0,
  52         },
  53 };
  54
  55 void __init lacie_v2_register_flash(void)
  56 {
  57         spi_register_board_info(lacie_v2_spi_slave_info,
  58                                 ARRAY_SIZE(lacie_v2_spi_slave_info));
  59         kirkwood_spi_init();
  60 }
  61
  62 /*****************************************************************************
  63  * I2C devices
  64  ****************************************************************************/
  65
  66 static struct at24_platform_data at24c04 = {
  67         .byte_len       = SZ_4K / 8,
  68         .page_size      = 16,
  69 };
  70
  71 /*
  72  * i2c addr | chip         | description
  73  * 0x50     | HT24LC04     | eeprom (512B)
  74  */
  75
  76 static struct i2c_board_info __initdata lacie_v2_i2c_info[] = {
  77         {
  78                 I2C_BOARD_INFO("24c04", 0x50),
  79                 .platform_data  = &at24c04,
  80         }
  81 };
  82
  83 void __init lacie_v2_register_i2c_devices(void)
  84 {
  85         kirkwood_i2c_init();
  86         i2c_register_board_info(0, lacie_v2_i2c_info,
  87                                 ARRAY_SIZE(lacie_v2_i2c_info));
  88 }
  89
  90 /*****************************************************************************
  91  * Hard Disk power
  92  ****************************************************************************/
  93
  94 static int __initdata lacie_v2_gpio_hdd_power[] = { 16, 17, 41, 42, 43 };
  95
  96 void __init lacie_v2_hdd_power_init(int hdd_num)
  97 {
  98         int i;
  99         int err;
 100
 101         /* Power up all hard disks. */
 102         for (i = 0; i < hdd_num; i++) {
 103                 err = gpio_request(lacie_v2_gpio_hdd_power[i], NULL);
 104                 if (err == 0) {
 105                         err = gpio_direction_output(
 106                                         lacie_v2_gpio_hdd_power[i], 1);
 107                         /* Free the HDD power GPIOs. This allow user-space to
 108                          * configure them via the gpiolib sysfs interface. */
 109                         gpio_free(lacie_v2_gpio_hdd_power[i]);
 110                 }
 111                 if (err)
 112                         pr_err("Failed to power up HDD%d\n", i + 1);
 113         }
 114 }