Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Laurent Pinchart | 802 | 93.58% | 1 | 10.00% |
Linus Walleij | 34 | 3.97% | 1 | 10.00% |
Jingoo Han | 10 | 1.17% | 2 | 20.00% |
Thomas Zimmermann | 4 | 0.47% | 2 | 20.00% |
Sam Ravnborg | 3 | 0.35% | 1 | 10.00% |
Thomas Gleixner | 2 | 0.23% | 1 | 10.00% |
Uwe Kleine-König | 2 | 0.23% | 2 | 20.00% |
Total | 857 | 10 |
// SPDX-License-Identifier: GPL-2.0-only /* * ROHM Semiconductor BD6107 LED Driver * * Copyright (C) 2013 Ideas on board SPRL * * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> */ #include <linux/backlight.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/fb.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/platform_data/bd6107.h> #include <linux/slab.h> #define BD6107_PSCNT1 0x00 #define BD6107_PSCNT1_PSCNTREG2 (1 << 2) #define BD6107_PSCNT1_PSCNTREG1 (1 << 0) #define BD6107_REGVSET 0x02 #define BD6107_REGVSET_REG1VSET_2_85V (1 << 2) #define BD6107_REGVSET_REG1VSET_2_80V (0 << 2) #define BD6107_LEDCNT1 0x03 #define BD6107_LEDCNT1_LEDONOFF2 (1 << 1) #define BD6107_LEDCNT1_LEDONOFF1 (1 << 0) #define BD6107_PORTSEL 0x04 #define BD6107_PORTSEL_LEDM(n) (1 << (n)) #define BD6107_RGB1CNT1 0x05 #define BD6107_RGB1CNT2 0x06 #define BD6107_RGB1CNT3 0x07 #define BD6107_RGB1CNT4 0x08 #define BD6107_RGB1CNT5 0x09 #define BD6107_RGB1FLM 0x0a #define BD6107_RGB2CNT1 0x0b #define BD6107_RGB2CNT2 0x0c #define BD6107_RGB2CNT3 0x0d #define BD6107_RGB2CNT4 0x0e #define BD6107_RGB2CNT5 0x0f #define BD6107_RGB2FLM 0x10 #define BD6107_PSCONT3 0x11 #define BD6107_SMMONCNT 0x12 #define BD6107_DCDCCNT 0x13 #define BD6107_IOSEL 0x14 #define BD6107_OUT1 0x15 #define BD6107_OUT2 0x16 #define BD6107_MASK1 0x17 #define BD6107_MASK2 0x18 #define BD6107_FACTOR1 0x19 #define BD6107_FACTOR2 0x1a #define BD6107_CLRFACT1 0x1b #define BD6107_CLRFACT2 0x1c #define BD6107_STATE1 0x1d #define BD6107_LSIVER 0x1e #define BD6107_GRPSEL 0x1f #define BD6107_LEDCNT2 0x20 #define BD6107_LEDCNT3 0x21 #define BD6107_MCURRENT 0x22 #define BD6107_MAINCNT1 0x23 #define BD6107_MAINCNT2 0x24 #define BD6107_SLOPECNT 0x25 #define BD6107_MSLOPE 0x26 #define BD6107_RGBSLOPE 0x27 #define BD6107_TEST 0x29 #define BD6107_SFTRST 0x2a #define BD6107_SFTRSTGD 0x2b struct bd6107 { struct i2c_client *client; struct backlight_device *backlight; struct bd6107_platform_data *pdata; struct gpio_desc *reset; }; static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data) { return i2c_smbus_write_byte_data(bd->client, reg, data); } static int bd6107_backlight_update_status(struct backlight_device *backlight) { struct bd6107 *bd = bl_get_data(backlight); int brightness = backlight_get_brightness(backlight); if (brightness) { bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) | BD6107_PORTSEL_LEDM(1) | BD6107_PORTSEL_LEDM(0)); bd6107_write(bd, BD6107_MAINCNT1, brightness); bd6107_write(bd, BD6107_LEDCNT1, BD6107_LEDCNT1_LEDONOFF1); } else { /* Assert the reset line (gpiolib will handle active low) */ gpiod_set_value(bd->reset, 1); msleep(24); gpiod_set_value(bd->reset, 0); } return 0; } static int bd6107_backlight_check_fb(struct backlight_device *backlight, struct fb_info *info) { struct bd6107 *bd = bl_get_data(backlight); return !bd->pdata->dev || bd->pdata->dev == info->device; } static const struct backlight_ops bd6107_backlight_ops = { .options = BL_CORE_SUSPENDRESUME, .update_status = bd6107_backlight_update_status, .check_fb = bd6107_backlight_check_fb, }; static int bd6107_probe(struct i2c_client *client) { struct bd6107_platform_data *pdata = dev_get_platdata(&client->dev); struct backlight_device *backlight; struct backlight_properties props; struct bd6107 *bd; int ret; if (pdata == NULL) { dev_err(&client->dev, "No platform data\n"); return -EINVAL; } if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_warn(&client->dev, "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); return -EIO; } bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL); if (!bd) return -ENOMEM; bd->client = client; bd->pdata = pdata; /* * Request the reset GPIO line with GPIOD_OUT_HIGH meaning asserted, * so in the machine descriptor table (or other hardware description), * the line should be flagged as active low so this will assert * the reset. */ bd->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(bd->reset)) { dev_err(&client->dev, "unable to request reset GPIO\n"); ret = PTR_ERR(bd->reset); return ret; } memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.max_brightness = 128; props.brightness = clamp_t(unsigned int, pdata->def_value, 0, props.max_brightness); backlight = devm_backlight_device_register(&client->dev, dev_name(&client->dev), &bd->client->dev, bd, &bd6107_backlight_ops, &props); if (IS_ERR(backlight)) { dev_err(&client->dev, "failed to register backlight\n"); return PTR_ERR(backlight); } backlight_update_status(backlight); i2c_set_clientdata(client, backlight); return 0; } static void bd6107_remove(struct i2c_client *client) { struct backlight_device *backlight = i2c_get_clientdata(client); backlight->props.brightness = 0; backlight_update_status(backlight); } static const struct i2c_device_id bd6107_ids[] = { { "bd6107", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, bd6107_ids); static struct i2c_driver bd6107_driver = { .driver = { .name = "bd6107", }, .probe = bd6107_probe, .remove = bd6107_remove, .id_table = bd6107_ids, }; module_i2c_driver(bd6107_driver); MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver"); MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); MODULE_LICENSE("GPL");
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