Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm/mach-orion5x/board-d2net.c
26292 views
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 <[email protected]>

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
}

117


118