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 <linux/gpio/machine.h>
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/pci.h>
  21 #include <plat/orion-gpio.h>
  22 #include "common.h"
  23 #include "orion5x.h"
  24
  25 /*****************************************************************************
  26  * LaCie d2 Network Info
  27  ****************************************************************************/
  28
  29 /*****************************************************************************
  30  * GPIO LED's
  31  ****************************************************************************/
  32
  33 /*
  34  * The blue front LED is wired to the CPLD and can blink in relation with the
  35  * SATA activity.
  36  *
  37  * The following array detail the different LED registers and the combination
  38  * of their possible values:
  39  *
  40  * led_off   | blink_ctrl | SATA active | LED state
  41  *           |            |             |
  42  *    1      |     x      |      x      |  off
  43  *    0      |     0      |      0      |  off
  44  *    0      |     1      |      0      |  blink (rate 300ms)
  45  *    0      |     x      |      1      |  on
  46  *
  47  * Notes: The blue and the red front LED's can't be on at the same time.
  48  *        Red LED have priority.
  49  */
  50
  51 #define D2NET_GPIO_RED_LED              6
  52 #define D2NET_GPIO_BLUE_LED_BLINK_CTRL  16
  53 #define D2NET_GPIO_BLUE_LED_OFF         23
  54
  55 static struct gpio_led d2net_leds[] = {
  56         {
  57                 .name = "d2net:blue:sata",
  58                 .default_trigger = "default-on",
  59         },
  60         {
  61                 .name = "d2net:red:fail",
  62         },
  63 };
  64
  65 static struct gpio_led_platform_data d2net_led_data = {
  66         .num_leds = ARRAY_SIZE(d2net_leds),
  67         .leds = d2net_leds,
  68 };
  69
  70 static struct platform_device d2net_gpio_leds = {
  71         .name           = "leds-gpio",
  72         .id             = -1,
  73         .dev            = {
  74                 .platform_data  = &d2net_led_data,
  75         },
  76 };
  77
  78 static struct gpiod_lookup_table d2net_leds_gpio_table = {
  79         .dev_id = "leds-gpio",
  80         .table = {
  81                 GPIO_LOOKUP_IDX("orion_gpio0", D2NET_GPIO_BLUE_LED_OFF, NULL,
  82                                 0, GPIO_ACTIVE_LOW),
  83                 GPIO_LOOKUP_IDX("orion_gpio0", D2NET_GPIO_RED_LED, NULL,
  84                                 1, GPIO_ACTIVE_HIGH),
  85                 { },
  86         },
  87 };
  88
  89 static void __init d2net_gpio_leds_init(void)
  90 {
  91         int err;
  92
  93         /* Configure register blink_ctrl to allow SATA activity LED blinking. */
  94         err = gpio_request(D2NET_GPIO_BLUE_LED_BLINK_CTRL, "blue LED blink");
  95         if (err == 0) {
  96                 err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, 1);
  97                 if (err)
  98                         gpio_free(D2NET_GPIO_BLUE_LED_BLINK_CTRL);
  99         }
 100         if (err)
 101                 pr_err("d2net: failed to configure blue LED blink GPIO\n");
 102
 103         gpiod_add_lookup_table(&d2net_leds_gpio_table);
 104         platform_device_register(&d2net_gpio_leds);
 105 }
 106
 107 /*****************************************************************************
 108  * General Setup
 109  ****************************************************************************/
 110
 111 void __init d2net_init(void)
 112 {
 113         d2net_gpio_leds_init();
 114
 115         pr_notice("d2net: Flash write are not yet supported.\n");
 116 }