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git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/misc/status_led.c
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <status_led.h>
12 * The purpose of this code is to signal the operational status of a
13 * target which usually boots over the network; while running in
14 * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
15 * message has been received, the LED is turned off. The Linux
16 * kernel, once it is running, will start blinking the LED again,
17 * with another frequency.
20 /* ------------------------------------------------------------------------- */
29 led_dev_t led_dev
[] = {
35 #if defined(STATUS_LED_BIT1)
42 #if defined(STATUS_LED_BIT2)
49 #if defined(STATUS_LED_BIT3)
56 #if defined(STATUS_LED_BIT4)
63 #if defined(STATUS_LED_BIT5)
72 #define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
74 static int status_led_init_done
= 0;
76 void status_led_init(void)
81 for (i
= 0, ld
= led_dev
; i
< MAX_LED_DEV
; i
++, ld
++)
82 __led_init (ld
->mask
, ld
->state
);
83 status_led_init_done
= 1;
86 void status_led_tick (ulong timestamp
)
91 if (!status_led_init_done
)
94 for (i
= 0, ld
= led_dev
; i
< MAX_LED_DEV
; i
++, ld
++) {
96 if (ld
->state
!= STATUS_LED_BLINKING
)
99 if (++ld
->cnt
>= ld
->period
) {
100 __led_toggle (ld
->mask
);
101 ld
->cnt
-= ld
->period
;
107 void status_led_set (int led
, int state
)
111 if (led
< 0 || led
>= MAX_LED_DEV
)
114 if (!status_led_init_done
)
120 if (state
== STATUS_LED_BLINKING
) {
121 ld
->cnt
= 0; /* always start with full period */
122 state
= STATUS_LED_ON
; /* always start with LED _ON_ */
124 __led_set (ld
->mask
, state
);