u-boot/include/led.h
Simon Glass 401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00

121 lines
2.6 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __LED_H
#define __LED_H
struct udevice;
/**
* struct led_uc_plat - Platform data the uclass stores about each device
*
* @label: LED label
*/
struct led_uc_plat {
const char *label;
};
/**
* struct led_uc_priv - Private data the uclass stores about each device
*
* @period_ms: Flash period in milliseconds
*/
struct led_uc_priv {
int period_ms;
};
enum led_state_t {
LEDST_OFF = 0,
LEDST_ON = 1,
LEDST_TOGGLE,
#ifdef CONFIG_LED_BLINK
LEDST_BLINK,
#endif
LEDST_COUNT,
};
struct led_ops {
/**
* set_state() - set the state of an LED
*
* @dev: LED device to change
* @state: LED state to set
* @return 0 if OK, -ve on error
*/
int (*set_state)(struct udevice *dev, enum led_state_t state);
/**
* led_get_state() - get the state of an LED
*
* @dev: LED device to change
* @return LED state led_state_t, or -ve on error
*/
enum led_state_t (*get_state)(struct udevice *dev);
#ifdef CONFIG_LED_BLINK
/**
* led_set_period() - set the blink period of an LED
*
* Thie records the period if supported, or returns -ENOSYS if not.
* To start the LED blinking, use set_state().
*
* @dev: LED device to change
* @period_ms: LED blink period in milliseconds
* @return 0 if OK, -ve on error
*/
int (*set_period)(struct udevice *dev, int period_ms);
#endif
};
#define led_get_ops(dev) ((struct led_ops *)(dev)->driver->ops)
/**
* led_get_by_label() - Find an LED device by label
*
* @label: LED label to look up
* @devp: Returns the associated device, if found
* @return 0 if found, -ENODEV if not found, other -ve on error
*/
int led_get_by_label(const char *label, struct udevice **devp);
/**
* led_set_state() - set the state of an LED
*
* @dev: LED device to change
* @state: LED state to set
* @return 0 if OK, -ve on error
*/
int led_set_state(struct udevice *dev, enum led_state_t state);
/**
* led_get_state() - get the state of an LED
*
* @dev: LED device to change
* @return LED state led_state_t, or -ve on error
*/
enum led_state_t led_get_state(struct udevice *dev);
/**
* led_set_period() - set the blink period of an LED
*
* @dev: LED device to change
* @period_ms: LED blink period in milliseconds
* @return 0 if OK, -ve on error
*/
int led_set_period(struct udevice *dev, int period_ms);
/**
* led_default_state() - set the default state for all the LED
*
* This enables all leds which have default state.
* see Documentation/devicetree/bindings/leds/common.txt
*
*/
int led_default_state(void);
#endif