arch/arm/mach-orion5x/board-d2net.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arch/arm/mach-orion5x/board-d2net.c
   4  *
   5  * LaCie d2Network and Big Disk Network NAS setup
   6  *
   7  * Copyright (C) 2009 Simon Guinot <sguinot@lacie.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/pci.h>
  14 #include <linux/irq.h>
  15 #include <linux/leds.h>
  16 #include <linux/gpio.h>
  17 #include <asm/mach-types.h>
  18 #include <asm/mach/arch.h>
  19 #include <asm/mach/pci.h>
  20 #include <plat/orion-gpio.h>
  21 #include "common.h"
  22 #include "orion5x.h"
  23
  24 /*****************************************************************************
  25  * LaCie d2 Network Info
  26  ****************************************************************************/
  27
  28 /*****************************************************************************
  29  * GPIO LED's
  30  ****************************************************************************/
  31
  32 /*
  33  * The blue front LED is wired to the CPLD and can blink in relation with the
  34  * SATA activity.
  35  *
  36  * The following array detail the different LED registers and the combination
  37  * of their possible values:
  38  *
  39  * led_off   | blink_ctrl | SATA active | LED state
  40  *           |            |             |
  41  *    1      |     x      |      x      |  off
  42  *    0      |     0      |      0      |  off
  43  *    0      |     1      |      0      |  blink (rate 300ms)
  44  *    0      |     x      |      1      |  on
  45  *
  46  * Notes: The blue and the red front LED's can't be on at the same time.
  47  *        Red LED have priority.
  48  */
  49
  50 #define D2NET_GPIO_RED_LED              6
  51 #define D2NET_GPIO_BLUE_LED_BLINK_CTRL  16
  52 #define D2NET_GPIO_BLUE_LED_OFF         23
  53
  54 static struct gpio_led d2net_leds[] = {
  55         {
  56                 .name = "d2net:blue:sata",
  57                 .default_trigger = "default-on",
  58                 .gpio = D2NET_GPIO_BLUE_LED_OFF,
  59                 .active_low = 1,
  60         },
  61         {
  62                 .name = "d2net:red:fail",
  63                 .gpio = D2NET_GPIO_RED_LED,
  64         },
  65 };
  66
  67 static struct gpio_led_platform_data d2net_led_data = {
  68         .num_leds = ARRAY_SIZE(d2net_leds),
  69         .leds = d2net_leds,
  70 };
  71
  72 static struct platform_device d2net_gpio_leds = {
  73         .name           = "leds-gpio",
  74         .id             = -1,
  75         .dev            = {
  76                 .platform_data  = &d2net_led_data,
  77         },
  78 };
  79
  80 static void __init d2net_gpio_leds_init(void)
  81 {
  82         int err;
  83
  84         /* Configure register blink_ctrl to allow SATA activity LED blinking. */
  85         err = gpio_request(D2NET_GPIO_BLUE_LED_BLINK_CTRL, "blue LED blink");
  86         if (err == 0) {
  87                 err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, 1);
  88                 if (err)
  89                         gpio_free(D2NET_GPIO_BLUE_LED_BLINK_CTRL);
  90         }
  91         if (err)
  92                 pr_err("d2net: failed to configure blue LED blink GPIO\n");
  93
  94         platform_device_register(&d2net_gpio_leds);
  95 }
  96
  97 /*****************************************************************************
  98  * General Setup
  99  ****************************************************************************/
 100
 101 void __init d2net_init(void)
 102 {
 103         d2net_gpio_leds_init();
 104
 105         pr_notice("d2net: Flash write are not yet supported.\n");
 106 }