linux/drivers/video/backlight/arcxcnn_bl.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Backlight driver for ArcticSand ARC_X_C_0N_0N Devices
 *
 * Copyright 2016 ArcticSand, Inc.
 * Author : Brian Dodge <[email protected]>
 */

#include <linux/backlight.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>

enum arcxcnn_chip_id { … };

/**
 * struct arcxcnn_platform_data
 * @name		: Backlight driver name (NULL will use default)
 * @initial_brightness	: initial value of backlight brightness
 * @leden		: initial LED string enables, upper bit is global on/off
 * @led_config_0	: fading speed (period between intensity steps)
 * @led_config_1	: misc settings, see datasheet
 * @dim_freq		: pwm dimming frequency if in pwm mode
 * @comp_config		: misc config, see datasheet
 * @filter_config	: RC/PWM filter config, see datasheet
 * @trim_config		: full scale current trim, see datasheet
 */
struct arcxcnn_platform_data { … };

#define ARCXCNN_CMD …
#define ARCXCNN_CMD_STDBY …
#define ARCXCNN_CMD_RESET …
#define ARCXCNN_CMD_BOOST …
#define ARCXCNN_CMD_OVP_MASK …
#define ARCXCNN_CMD_OVP_XXV …
#define ARCXCNN_CMD_OVP_20V …
#define ARCXCNN_CMD_OVP_24V …
#define ARCXCNN_CMD_OVP_31V …
#define ARCXCNN_CMD_EXT_COMP …

#define ARCXCNN_CONFIG …
#define ARCXCNN_STATUS1 …
#define ARCXCNN_STATUS2 …
#define ARCXCNN_FADECTRL …
#define ARCXCNN_ILED_CONFIG …
#define ARCXCNN_ILED_DIM_PWM …
#define ARCXCNN_ILED_DIM_INT …
#define ARCXCNN_LEDEN …
#define ARCXCNN_LEDEN_ISETEXT …
#define ARCXCNN_LEDEN_MASK …
#define ARCXCNN_LEDEN_BITS …
#define ARCXCNN_LEDEN_LED1 …
#define ARCXCNN_LEDEN_LED2 …
#define ARCXCNN_LEDEN_LED3 …
#define ARCXCNN_LEDEN_LED4 …
#define ARCXCNN_LEDEN_LED5 …
#define ARCXCNN_LEDEN_LED6 …

#define ARCXCNN_WLED_ISET_LSB …
#define ARCXCNN_WLED_ISET_LSB_SHIFT …
#define ARCXCNN_WLED_ISET_MSB …

#define ARCXCNN_DIMFREQ …
#define ARCXCNN_COMP_CONFIG …
#define ARCXCNN_FILT_CONFIG …
#define ARCXCNN_IMAXTUNE …
#define ARCXCNN_ID_MSB …
#define ARCXCNN_ID_LSB …

#define MAX_BRIGHTNESS …
#define INIT_BRIGHT …

struct arcxcnn { … };

static int arcxcnn_update_field(struct arcxcnn *lp, u8 reg, u8 mask, u8 data)
{ … }

static int arcxcnn_set_brightness(struct arcxcnn *lp, u32 brightness)
{ … }

static int arcxcnn_bl_update_status(struct backlight_device *bl)
{ … }

static const struct backlight_ops arcxcnn_bl_ops = …;

static int arcxcnn_backlight_register(struct arcxcnn *lp)
{ … }

static void arcxcnn_parse_dt(struct arcxcnn *lp)
{ … }

static int arcxcnn_probe(struct i2c_client *cl)
{ … }

static void arcxcnn_remove(struct i2c_client *cl)
{ … }

static const struct of_device_id arcxcnn_dt_ids[] = …;
MODULE_DEVICE_TABLE(of, arcxcnn_dt_ids);

static const struct i2c_device_id arcxcnn_ids[] = …;
MODULE_DEVICE_TABLE(i2c, arcxcnn_ids);

static struct i2c_driver arcxcnn_driver = …;
module_i2c_driver(…) …;

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;