| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Michael Hennerich | 4542 | 97.24% | 2 | 10.53% |
| Jingoo Han | 89 | 1.91% | 6 | 31.58% |
| Wei Yongjun | 10 | 0.21% | 1 | 5.26% |
| Arnd Bergmann | 9 | 0.19% | 1 | 5.26% |
| Andrew Morton | 6 | 0.13% | 1 | 5.26% |
| Sam Ravnborg | 4 | 0.09% | 1 | 5.26% |
| Axel Lin | 3 | 0.06% | 2 | 10.53% |
| Kees Cook | 2 | 0.04% | 1 | 5.26% |
| Thomas Gleixner | 2 | 0.04% | 1 | 5.26% |
| Lars-Peter Clausen | 2 | 0.04% | 1 | 5.26% |
| Uwe Kleine-König | 1 | 0.02% | 1 | 5.26% |
| Wolfram Sang | 1 | 0.02% | 1 | 5.26% |
| Total | 4671 | 19 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Backlight driver for Analog Devices ADP8870 Backlight Devices * * Copyright 2009-2011 Analog Devices Inc. */ #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/pm.h> #include <linux/platform_device.h> #include <linux/i2c.h> #include <linux/fb.h> #include <linux/backlight.h> #include <linux/leds.h> #include <linux/workqueue.h> #include <linux/slab.h> #include <linux/platform_data/adp8870.h> #define ADP8870_EXT_FEATURES #define ADP8870_USE_LEDS #define ADP8870_MFDVID 0x00 /* Manufacturer and device ID */ #define ADP8870_MDCR 0x01 /* Device mode and status */ #define ADP8870_INT_STAT 0x02 /* Interrupts status */ #define ADP8870_INT_EN 0x03 /* Interrupts enable */ #define ADP8870_CFGR 0x04 /* Configuration register */ #define ADP8870_BLSEL 0x05 /* Sink enable backlight or independent */ #define ADP8870_PWMLED 0x06 /* PWM Enable Selection Register */ #define ADP8870_BLOFF 0x07 /* Backlight off timeout */ #define ADP8870_BLDIM 0x08 /* Backlight dim timeout */ #define ADP8870_BLFR 0x09 /* Backlight fade in and out rates */ #define ADP8870_BLMX1 0x0A /* Backlight (Brightness Level 1-daylight) maximum current */ #define ADP8870_BLDM1 0x0B /* Backlight (Brightness Level 1-daylight) dim current */ #define ADP8870_BLMX2 0x0C /* Backlight (Brightness Level 2-bright) maximum current */ #define ADP8870_BLDM2 0x0D /* Backlight (Brightness Level 2-bright) dim current */ #define ADP8870_BLMX3 0x0E /* Backlight (Brightness Level 3-office) maximum current */ #define ADP8870_BLDM3 0x0F /* Backlight (Brightness Level 3-office) dim current */ #define ADP8870_BLMX4 0x10 /* Backlight (Brightness Level 4-indoor) maximum current */ #define ADP8870_BLDM4 0x11 /* Backlight (Brightness Level 4-indoor) dim current */ #define ADP8870_BLMX5 0x12 /* Backlight (Brightness Level 5-dark) maximum current */ #define ADP8870_BLDM5 0x13 /* Backlight (Brightness Level 5-dark) dim current */ #define ADP8870_ISCLAW 0x1A /* Independent sink current fade law register */ #define ADP8870_ISCC 0x1B /* Independent sink current control register */ #define ADP8870_ISCT1 0x1C /* Independent Sink Current Timer Register LED[7:5] */ #define ADP8870_ISCT2 0x1D /* Independent Sink Current Timer Register LED[4:1] */ #define ADP8870_ISCF 0x1E /* Independent sink current fade register */ #define ADP8870_ISC1 0x1F /* Independent Sink Current LED1 */ #define ADP8870_ISC2 0x20 /* Independent Sink Current LED2 */ #define ADP8870_ISC3 0x21 /* Independent Sink Current LED3 */ #define ADP8870_ISC4 0x22 /* Independent Sink Current LED4 */ #define ADP8870_ISC5 0x23 /* Independent Sink Current LED5 */ #define ADP8870_ISC6 0x24 /* Independent Sink Current LED6 */ #define ADP8870_ISC7 0x25 /* Independent Sink Current LED7 (Brightness Level 1-daylight) */ #define ADP8870_ISC7_L2 0x26 /* Independent Sink Current LED7 (Brightness Level 2-bright) */ #define ADP8870_ISC7_L3 0x27 /* Independent Sink Current LED7 (Brightness Level 3-office) */ #define ADP8870_ISC7_L4 0x28 /* Independent Sink Current LED7 (Brightness Level 4-indoor) */ #define ADP8870_ISC7_L5 0x29 /* Independent Sink Current LED7 (Brightness Level 5-dark) */ #define ADP8870_CMP_CTL 0x2D /* ALS Comparator Control Register */ #define ADP8870_ALS1_EN 0x2E /* Main ALS comparator level enable */ #define ADP8870_ALS2_EN 0x2F /* Second ALS comparator level enable */ #define ADP8870_ALS1_STAT 0x30 /* Main ALS Comparator Status Register */ #define ADP8870_ALS2_STAT 0x31 /* Second ALS Comparator Status Register */ #define ADP8870_L2TRP 0x32 /* L2 comparator reference */ #define ADP8870_L2HYS 0x33 /* L2 hysteresis */ #define ADP8870_L3TRP 0x34 /* L3 comparator reference */ #define ADP8870_L3HYS 0x35 /* L3 hysteresis */ #define ADP8870_L4TRP 0x36 /* L4 comparator reference */ #define ADP8870_L4HYS 0x37 /* L4 hysteresis */ #define ADP8870_L5TRP 0x38 /* L5 comparator reference */ #define ADP8870_L5HYS 0x39 /* L5 hysteresis */ #define ADP8870_PH1LEVL 0x40 /* First phototransistor ambient light level-low byte register */ #define ADP8870_PH1LEVH 0x41 /* First phototransistor ambient light level-high byte register */ #define ADP8870_PH2LEVL 0x42 /* Second phototransistor ambient light level-low byte register */ #define ADP8870_PH2LEVH 0x43 /* Second phototransistor ambient light level-high byte register */ #define ADP8870_MANUFID 0x3 /* Analog Devices AD8870 Manufacturer and device ID */ #define ADP8870_DEVID(x) ((x) & 0xF) #define ADP8870_MANID(x) ((x) >> 4) /* MDCR Device mode and status */ #define D7ALSEN (1 << 7) #define INT_CFG (1 << 6) #define NSTBY (1 << 5) #define DIM_EN (1 << 4) #define GDWN_DIS (1 << 3) #define SIS_EN (1 << 2) #define CMP_AUTOEN (1 << 1) #define BLEN (1 << 0) /* ADP8870_ALS1_EN Main ALS comparator level enable */ #define L5_EN (1 << 3) #define L4_EN (1 << 2) #define L3_EN (1 << 1) #define L2_EN (1 << 0) #define CFGR_BLV_SHIFT 3 #define CFGR_BLV_MASK 0x7 #define ADP8870_FLAG_LED_MASK 0xFF #define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) #define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) #define ALS_CMPR_CFG_VAL(filt) ((0x7 & (filt)) << 1) struct adp8870_bl { struct i2c_client *client; struct backlight_device *bl; struct adp8870_led *led; struct adp8870_backlight_platform_data *pdata; struct mutex lock; unsigned long cached_daylight_max; int id; int revid; int current_brightness; }; struct adp8870_led { struct led_classdev cdev; struct work_struct work; struct i2c_client *client; enum led_brightness new_brightness; int id; int flags; }; static int adp8870_read(struct i2c_client *client, int reg, uint8_t *val) { int ret; ret = i2c_smbus_read_byte_data(client, reg); if (ret < 0) { dev_err(&client->dev, "failed reading at 0x%02x\n", reg); return ret; } *val = ret; return 0; } static int adp8870_write(struct i2c_client *client, u8 reg, u8 val) { int ret = i2c_smbus_write_byte_data(client, reg, val); if (ret) dev_err(&client->dev, "failed to write\n"); return ret; } static int adp8870_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) { struct adp8870_bl *data = i2c_get_clientdata(client); uint8_t reg_val; int ret; mutex_lock(&data->lock); ret = adp8870_read(client, reg, ®_val); if (!ret && ((reg_val & bit_mask) != bit_mask)) { reg_val |= bit_mask; ret = adp8870_write(client, reg, reg_val); } mutex_unlock(&data->lock); return ret; } static int adp8870_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) { struct adp8870_bl *data = i2c_get_clientdata(client); uint8_t reg_val; int ret; mutex_lock(&data->lock); ret = adp8870_read(client, reg, ®_val); if (!ret && (reg_val & bit_mask)) { reg_val &= ~bit_mask; ret = adp8870_write(client, reg, reg_val); } mutex_unlock(&data->lock); return ret; } /* * Independent sink / LED */ #if defined(ADP8870_USE_LEDS) static void adp8870_led_work(struct work_struct *work) { struct adp8870_led *led = container_of(work, struct adp8870_led, work); adp8870_write(led->client, ADP8870_ISC1 + led->id - 1, led->new_brightness >> 1); } static void adp8870_led_set(struct led_classdev *led_cdev, enum led_brightness value) { struct adp8870_led *led; led = container_of(led_cdev, struct adp8870_led, cdev); led->new_brightness = value; /* * Use workqueue for IO since I2C operations can sleep. */ schedule_work(&led->work); } static int adp8870_led_setup(struct adp8870_led *led) { struct i2c_client *client = led->client; int ret = 0; ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0); if (ret) return ret; ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1)); if (ret) return ret; if (led->id > 4) ret = adp8870_set_bits(client, ADP8870_ISCT1, (led->flags & 0x3) << ((led->id - 5) * 2)); else ret = adp8870_set_bits(client, ADP8870_ISCT2, (led->flags & 0x3) << ((led->id - 1) * 2)); return ret; } static int adp8870_led_probe(struct i2c_client *client) { struct adp8870_backlight_platform_data *pdata = dev_get_platdata(&client->dev); struct adp8870_bl *data = i2c_get_clientdata(client); struct adp8870_led *led, *led_dat; struct led_info *cur_led; int ret, i; led = devm_kcalloc(&client->dev, pdata->num_leds, sizeof(*led), GFP_KERNEL); if (led == NULL) return -ENOMEM; ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law); if (ret) return ret; ret = adp8870_write(client, ADP8870_ISCT1, (pdata->led_on_time & 0x3) << 6); if (ret) return ret; ret = adp8870_write(client, ADP8870_ISCF, FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); if (ret) return ret; for (i = 0; i < pdata->num_leds; ++i) { cur_led = &pdata->leds[i]; led_dat = &led[i]; led_dat->id = cur_led->flags & ADP8870_FLAG_LED_MASK; if (led_dat->id > 7 || led_dat->id < 1) { dev_err(&client->dev, "Invalid LED ID %d\n", led_dat->id); ret = -EINVAL; goto err; } if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { dev_err(&client->dev, "LED %d used by Backlight\n", led_dat->id); ret = -EBUSY; goto err; } led_dat->cdev.name = cur_led->name; led_dat->cdev.default_trigger = cur_led->default_trigger; led_dat->cdev.brightness_set = adp8870_led_set; led_dat->cdev.brightness = LED_OFF; led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; led_dat->client = client; led_dat->new_brightness = LED_OFF; INIT_WORK(&led_dat->work, adp8870_led_work); ret = led_classdev_register(&client->dev, &led_dat->cdev); if (ret) { dev_err(&client->dev, "failed to register LED %d\n", led_dat->id); goto err; } ret = adp8870_led_setup(led_dat); if (ret) { dev_err(&client->dev, "failed to write\n"); i++; goto err; } } data->led = led; return 0; err: for (i = i - 1; i >= 0; --i) { led_classdev_unregister(&led[i].cdev); cancel_work_sync(&led[i].work); } return ret; } static int adp8870_led_remove(struct i2c_client *client) { struct adp8870_backlight_platform_data *pdata = dev_get_platdata(&client->dev); struct adp8870_bl *data = i2c_get_clientdata(client); int i; for (i = 0; i < pdata->num_leds; i++) { led_classdev_unregister(&data->led[i].cdev); cancel_work_sync(&data->led[i].work); } return 0; } #else static int adp8870_led_probe(struct i2c_client *client) { return 0; } static int adp8870_led_remove(struct i2c_client *client) { return 0; } #endif static int adp8870_bl_set(struct backlight_device *bl, int brightness) { struct adp8870_bl *data = bl_get_data(bl); struct i2c_client *client = data->client; int ret = 0; if (data->pdata->en_ambl_sens) { if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) { /* Disable Ambient Light auto adjust */ ret = adp8870_clr_bits(client, ADP8870_MDCR, CMP_AUTOEN); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLMX1, brightness); if (ret) return ret; } else { /* * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust * restore daylight l1 sysfs brightness */ ret = adp8870_write(client, ADP8870_BLMX1, data->cached_daylight_max); if (ret) return ret; ret = adp8870_set_bits(client, ADP8870_MDCR, CMP_AUTOEN); if (ret) return ret; } } else { ret = adp8870_write(client, ADP8870_BLMX1, brightness); if (ret) return ret; } if (data->current_brightness && brightness == 0) ret = adp8870_set_bits(client, ADP8870_MDCR, DIM_EN); else if (data->current_brightness == 0 && brightness) ret = adp8870_clr_bits(client, ADP8870_MDCR, DIM_EN); if (!ret) data->current_brightness = brightness; return ret; } static int adp8870_bl_update_status(struct backlight_device *bl) { return adp8870_bl_set(bl, backlight_get_brightness(bl)); } static int adp8870_bl_get_brightness(struct backlight_device *bl) { struct adp8870_bl *data = bl_get_data(bl); return data->current_brightness; } static const struct backlight_ops adp8870_bl_ops = { .update_status = adp8870_bl_update_status, .get_brightness = adp8870_bl_get_brightness, }; static int adp8870_bl_setup(struct backlight_device *bl) { struct adp8870_bl *data = bl_get_data(bl); struct i2c_client *client = data->client; struct adp8870_backlight_platform_data *pdata = data->pdata; int ret = 0; ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); if (ret) return ret; ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); if (ret) return ret; if (pdata->en_ambl_sens) { data->cached_daylight_max = pdata->l1_daylight_max; ret = adp8870_write(client, ADP8870_BLMX2, pdata->l2_bright_max); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLDM2, pdata->l2_bright_dim); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLMX3, pdata->l3_office_max); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLDM3, pdata->l3_office_dim); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLMX4, pdata->l4_indoor_max); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLDM4, pdata->l4_indor_dim); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLMX5, pdata->l5_dark_max); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLDM5, pdata->l5_dark_dim); if (ret) return ret; ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); if (ret) return ret; ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); if (ret) return ret; ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); if (ret) return ret; ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); if (ret) return ret; ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); if (ret) return ret; ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); if (ret) return ret; ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); if (ret) return ret; ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); if (ret) return ret; ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | L3_EN | L2_EN); if (ret) return ret; ret = adp8870_write(client, ADP8870_CMP_CTL, ALS_CMPR_CFG_VAL(pdata->abml_filt)); if (ret) return ret; } ret = adp8870_write(client, ADP8870_CFGR, BL_CFGR_VAL(pdata->bl_fade_law, 0)); if (ret) return ret; ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, pdata->bl_fade_out)); if (ret) return ret; /* * ADP8870 Rev0 requires GDWN_DIS bit set */ ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | (data->revid == 0 ? GDWN_DIS : 0)); return ret; } static ssize_t adp8870_show(struct device *dev, char *buf, int reg) { struct adp8870_bl *data = dev_get_drvdata(dev); int error; uint8_t reg_val; mutex_lock(&data->lock); error = adp8870_read(data->client, reg, ®_val); mutex_unlock(&data->lock); if (error < 0) return error; return sprintf(buf, "%u\n", reg_val); } static ssize_t adp8870_store(struct device *dev, const char *buf, size_t count, int reg) { struct adp8870_bl *data = dev_get_drvdata(dev); unsigned long val; int ret; ret = kstrtoul(buf, 10, &val); if (ret) return ret; mutex_lock(&data->lock); adp8870_write(data->client, reg, val); mutex_unlock(&data->lock); return count; } static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLMX5); } static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLMX5); } static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, adp8870_bl_l5_dark_max_store); static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLMX4); } static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLMX4); } static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, adp8870_bl_l4_indoor_max_store); static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLMX3); } static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLMX3); } static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, adp8870_bl_l3_office_max_store); static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLMX2); } static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLMX2); } static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, adp8870_bl_l2_bright_max_store); static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLMX1); } static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct adp8870_bl *data = dev_get_drvdata(dev); int ret = kstrtoul(buf, 10, &data->cached_daylight_max); if (ret) return ret; return adp8870_store(dev, buf, count, ADP8870_BLMX1); } static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show, adp8870_bl_l1_daylight_max_store); static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLDM5); } static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLDM5); } static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show, adp8870_bl_l5_dark_dim_store); static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLDM4); } static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLDM4); } static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show, adp8870_bl_l4_indoor_dim_store); static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLDM3); } static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLDM3); } static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show, adp8870_bl_l3_office_dim_store); static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLDM2); } static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLDM2); } static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show, adp8870_bl_l2_bright_dim_store); static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev, struct device_attribute *attr, char *buf) { return adp8870_show(dev, buf, ADP8870_BLDM1); } static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { return adp8870_store(dev, buf, count, ADP8870_BLDM1); } static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show, adp8870_bl_l1_daylight_dim_store); #ifdef ADP8870_EXT_FEATURES static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adp8870_bl *data = dev_get_drvdata(dev); int error; uint8_t reg_val; uint16_t ret_val; mutex_lock(&data->lock); error = adp8870_read(data->client, ADP8870_PH1LEVL, ®_val); if (error < 0) { mutex_unlock(&data->lock); return error; } ret_val = reg_val; error = adp8870_read(data->client, ADP8870_PH1LEVH, ®_val); mutex_unlock(&data->lock); if (error < 0) return error; /* Return 13-bit conversion value for the first light sensor */ ret_val += (reg_val & 0x1F) << 8; return sprintf(buf, "%u\n", ret_val); } static DEVICE_ATTR(ambient_light_level, 0444, adp8870_bl_ambient_light_level_show, NULL); static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adp8870_bl *data = dev_get_drvdata(dev); int error; uint8_t reg_val; mutex_lock(&data->lock); error = adp8870_read(data->client, ADP8870_CFGR, ®_val); mutex_unlock(&data->lock); if (error < 0) return error; return sprintf(buf, "%u\n", ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); } static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct adp8870_bl *data = dev_get_drvdata(dev); unsigned long val; uint8_t reg_val; int ret; ret = kstrtoul(buf, 10, &val); if (ret) return ret; if (val == 0) { /* Enable automatic ambient light sensing */ adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); } else if ((val > 0) && (val < 6)) { /* Disable automatic ambient light sensing */ adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); /* Set user supplied ambient light zone */ mutex_lock(&data->lock); ret = adp8870_read(data->client, ADP8870_CFGR, ®_val); if (!ret) { reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); reg_val |= (val - 1) << CFGR_BLV_SHIFT; adp8870_write(data->client, ADP8870_CFGR, reg_val); } mutex_unlock(&data->lock); } return count; } static DEVICE_ATTR(ambient_light_zone, 0664, adp8870_bl_ambient_light_zone_show, adp8870_bl_ambient_light_zone_store); #endif static struct attribute *adp8870_bl_attributes[] = { &dev_attr_l5_dark_max.attr, &dev_attr_l5_dark_dim.attr, &dev_attr_l4_indoor_max.attr, &dev_attr_l4_indoor_dim.attr, &dev_attr_l3_office_max.attr, &dev_attr_l3_office_dim.attr, &dev_attr_l2_bright_max.attr, &dev_attr_l2_bright_dim.attr, &dev_attr_l1_daylight_max.attr, &dev_attr_l1_daylight_dim.attr, #ifdef ADP8870_EXT_FEATURES &dev_attr_ambient_light_level.attr, &dev_attr_ambient_light_zone.attr, #endif NULL }; static const struct attribute_group adp8870_bl_attr_group = { .attrs = adp8870_bl_attributes, }; static int adp8870_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct backlight_properties props; struct backlight_device *bl; struct adp8870_bl *data; struct adp8870_backlight_platform_data *pdata = dev_get_platdata(&client->dev); uint8_t reg_val; int ret; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); return -EIO; } if (!pdata) { dev_err(&client->dev, "no platform data?\n"); return -EINVAL; } ret = adp8870_read(client, ADP8870_MFDVID, ®_val); if (ret < 0) return -EIO; if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { dev_err(&client->dev, "failed to probe\n"); return -ENODEV; } data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; data->revid = ADP8870_DEVID(reg_val); data->client = client; data->pdata = pdata; data->id = id->driver_data; data->current_brightness = 0; i2c_set_clientdata(client, data); mutex_init(&data->lock); memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; bl = devm_backlight_device_register(&client->dev, dev_driver_string(&client->dev), &client->dev, data, &adp8870_bl_ops, &props); if (IS_ERR(bl)) { dev_err(&client->dev, "failed to register backlight\n"); return PTR_ERR(bl); } data->bl = bl; if (pdata->en_ambl_sens) { ret = sysfs_create_group(&bl->dev.kobj, &adp8870_bl_attr_group); if (ret) { dev_err(&client->dev, "failed to register sysfs\n"); return ret; } } ret = adp8870_bl_setup(bl); if (ret) { ret = -EIO; goto out; } backlight_update_status(bl); dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); if (pdata->num_leds) adp8870_led_probe(client); return 0; out: if (data->pdata->en_ambl_sens) sysfs_remove_group(&data->bl->dev.kobj, &adp8870_bl_attr_group); return ret; } static void adp8870_remove(struct i2c_client *client) { struct adp8870_bl *data = i2c_get_clientdata(client); adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); if (data->led) adp8870_led_remove(client); if (data->pdata->en_ambl_sens) sysfs_remove_group(&data->bl->dev.kobj, &adp8870_bl_attr_group); } #ifdef CONFIG_PM_SLEEP static int adp8870_i2c_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); return 0; } static int adp8870_i2c_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN); return 0; } #endif static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend, adp8870_i2c_resume); static const struct i2c_device_id adp8870_id[] = { { "adp8870", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, adp8870_id); static struct i2c_driver adp8870_driver = { .driver = { .name = KBUILD_MODNAME, .pm = &adp8870_i2c_pm_ops, }, .probe = adp8870_probe, .remove = adp8870_remove, .id_table = adp8870_id, }; module_i2c_driver(adp8870_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); MODULE_DESCRIPTION("ADP8870 Backlight driver");
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