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
55static 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
65static struct gpio_led_platform_data d2net_led_data = {
66 .num_leds = ARRAY_SIZE(d2net_leds),
67 .leds = d2net_leds,
68};
69
70static struct platform_device d2net_gpio_leds = {
71 .name = "leds-gpio",
72 .id = -1,
73 .dev = {
74 .platform_data = &d2net_led_data,
75 },
76};
77
78static 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
89static 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, label: "blue LED blink");
95 if (err == 0) {
96 err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, value: 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(table: &d2net_leds_gpio_table);
104 platform_device_register(&d2net_gpio_leds);
105}
106
107/*****************************************************************************
108 * General Setup
109 ****************************************************************************/
110
111void __init d2net_init(void)
112{
113 d2net_gpio_leds_init();
114
115 pr_notice("d2net: Flash write are not yet supported.\n");
116}
117

source code of linux/arch/arm/mach-orion5x/board-d2net.c