linux/include/linux/leds-bd2802.h
Linus Walleij 4c3718f9d6 leds: bd2802: Convert to use GPIO descriptors
The Rohm BD2802 have no in-kernel users so we can drop the
GPIO number from the platform data and require users to
provide the GPIO line using machine descriptors.

As the descriptors come with inherent polarity inversion
semantics, we invert the calls to set the GPIO line such
that 0 means "unasserted" and 1 means "asserted".

Put a note in the driver that machine descriptor tables
will need to specify that the line is active low.

Cc: Kim Kyuwon <chammoru@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-12-21 20:09:54 +01:00

22 lines
476 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* leds-bd2802.h - RGB LED Driver
*
* Copyright (C) 2009 Samsung Electronics
* Kim Kyuwon <q1.kim@samsung.com>
*
* Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
*/
#ifndef _LEDS_BD2802_H_
#define _LEDS_BD2802_H_
struct bd2802_led_platform_data{
u8 rgb_time;
};
#define RGB_TIME(slopedown, slopeup, waveform) \
((slopedown) << 6 | (slopeup) << 4 | (waveform))
#endif /* _LEDS_BD2802_H_ */