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backlight: new driver for the ADP8860 backlight parts
The ADP8860 combines a programmable backlight LED charge pump driver with automatic phototransistor control. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Michael Hennerich
Richard Purdie
parent
9844ce0501
commit
82fd53b7f7
@ -264,6 +264,18 @@ config BACKLIGHT_ADP5520
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To compile this driver as a module, choose M here: the module will
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be called adp5520_bl.
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config BACKLIGHT_ADP8860
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tristate "Backlight Driver for ADP8860 using WLED"
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depends on BACKLIGHT_CLASS_DEVICE && I2C
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select NEW_LEDS
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select LEDS_CLASS
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help
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If you have a LCD backlight connected to the ADP8860,
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say Y here to enable this driver.
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To compile this driver as a module, choose M here: the module will
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be called adp8860_bl.
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config BACKLIGHT_88PM860X
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tristate "Backlight Driver for 88PM8606 using WLED"
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depends on MFD_88PM860X
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@ -30,5 +30,6 @@ obj-$(CONFIG_BACKLIGHT_SAHARA) += kb3886_bl.o
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obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o
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obj-$(CONFIG_BACKLIGHT_ADX) += adx_bl.o
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obj-$(CONFIG_BACKLIGHT_ADP5520) += adp5520_bl.o
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obj-$(CONFIG_BACKLIGHT_ADP8860) += adp8860_bl.o
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obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
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809
drivers/video/backlight/adp8860_bl.c
Normal file
809
drivers/video/backlight/adp8860_bl.c
Normal file
@ -0,0 +1,809 @@
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/*
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* Backlight driver for Analog Devices ADP8860 Backlight Devices
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*
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* Copyright 2009-2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/pm.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/fb.h>
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#include <linux/backlight.h>
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#include <linux/leds.h>
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#include <linux/workqueue.h>
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#include <linux/i2c/adp8860.h>
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#define ADP8860_EXT_FEATURES
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#define ADP8860_USE_LEDS
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#define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */
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#define ADP8860_MDCR 0x01 /* Device mode and status */
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#define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */
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#define ADP8860_INTR_EN 0x03 /* Interrupts enable */
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#define ADP8860_CFGR 0x04 /* Configuration register */
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#define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */
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#define ADP8860_BLOFF 0x06 /* Backlight off timeout */
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#define ADP8860_BLDIM 0x07 /* Backlight dim timeout */
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#define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */
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#define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */
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#define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */
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#define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */
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#define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */
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#define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */
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#define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */
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#define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */
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#define ADP8860_ISCC 0x10 /* Independent sink current control register */
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#define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */
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#define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */
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#define ADP8860_ISCF 0x13 /* Independent sink current fade register */
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#define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */
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#define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */
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#define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */
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#define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */
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#define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */
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#define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */
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#define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */
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#define ADP8860_CCFG 0x1B /* Comparator configuration */
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#define ADP8860_CCFG2 0x1C /* Second comparator configuration */
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#define ADP8860_L2_TRP 0x1D /* L2 comparator reference */
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#define ADP8860_L2_HYS 0x1E /* L2 hysteresis */
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#define ADP8860_L3_TRP 0x1F /* L3 comparator reference */
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#define ADP8860_L3_HYS 0x20 /* L3 hysteresis */
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#define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */
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#define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */
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#define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */
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#define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */
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#define ADP8860_MANUFID 0x0 /* Analog Devices ADP8860 Manufacturer ID */
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#define ADP8860_DEVICEID 0x7 /* Analog Devices ADP8860 Device ID */
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#define ADP8860_DEVID(x) ((x) & 0xF)
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#define ADP8860_MANID(x) ((x) >> 4)
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/* MDCR Device mode and status */
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#define INT_CFG (1 << 6)
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#define NSTBY (1 << 5)
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#define DIM_EN (1 << 4)
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#define SIS_EN (1 << 2)
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#define CMP_AUTOEN (1 << 1)
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#define BLEN (1 << 0)
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/* ADP8860_CCFG Main ALS comparator level enable */
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#define L3_EN (1 << 1)
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#define L2_EN (1 << 0)
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#define CFGR_BLV_SHIFT 3
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#define CFGR_BLV_MASK 0x3
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#define ADP8860_FLAG_LED_MASK 0xFF
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#define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4))
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#define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1))
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#define ALS_CCFG_VAL(filt) ((0x7 & filt) << 5)
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struct adp8860_led {
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struct led_classdev cdev;
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struct work_struct work;
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struct i2c_client *client;
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enum led_brightness new_brightness;
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int id;
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int flags;
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};
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struct adp8860_bl {
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struct i2c_client *client;
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struct backlight_device *bl;
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struct adp8860_led *led;
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struct adp8860_backlight_platform_data *pdata;
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struct mutex lock;
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unsigned long cached_daylight_max;
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int id;
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int revid;
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int current_brightness;
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};
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static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
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return ret;
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}
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*val = (uint8_t)ret;
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return 0;
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}
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static int adp8860_write(struct i2c_client *client, u8 reg, u8 val)
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{
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return i2c_smbus_write_byte_data(client, reg, val);
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}
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static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
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{
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struct adp8860_bl *data = i2c_get_clientdata(client);
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uint8_t reg_val;
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int ret;
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mutex_lock(&data->lock);
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ret = adp8860_read(client, reg, ®_val);
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if (!ret && ((reg_val & bit_mask) == 0)) {
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reg_val |= bit_mask;
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ret = adp8860_write(client, reg, reg_val);
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}
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mutex_unlock(&data->lock);
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return ret;
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}
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static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
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{
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struct adp8860_bl *data = i2c_get_clientdata(client);
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uint8_t reg_val;
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int ret;
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mutex_lock(&data->lock);
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ret = adp8860_read(client, reg, ®_val);
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if (!ret && (reg_val & bit_mask)) {
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reg_val &= ~bit_mask;
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ret = adp8860_write(client, reg, reg_val);
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}
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mutex_unlock(&data->lock);
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return ret;
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}
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/*
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* Independent sink / LED
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*/
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#if defined(ADP8860_USE_LEDS)
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static void adp8860_led_work(struct work_struct *work)
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{
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struct adp8860_led *led = container_of(work, struct adp8860_led, work);
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adp8860_write(led->client, ADP8860_ISC1 - led->id + 1,
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led->new_brightness >> 1);
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}
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static void adp8860_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct adp8860_led *led;
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led = container_of(led_cdev, struct adp8860_led, cdev);
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led->new_brightness = value;
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schedule_work(&led->work);
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}
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static int adp8860_led_setup(struct adp8860_led *led)
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{
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struct i2c_client *client = led->client;
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int ret = 0;
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ret = adp8860_write(client, ADP8860_ISC1 - led->id + 1, 0);
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ret |= adp8860_set_bits(client, ADP8860_ISCC, 1 << (led->id - 1));
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if (led->id > 4)
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ret |= adp8860_set_bits(client, ADP8860_ISCT1,
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(led->flags & 0x3) << ((led->id - 5) * 2));
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else
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ret |= adp8860_set_bits(client, ADP8860_ISCT2,
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(led->flags & 0x3) << ((led->id - 1) * 2));
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return ret;
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}
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static int __devinit adp8860_led_probe(struct i2c_client *client)
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{
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struct adp8860_backlight_platform_data *pdata =
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client->dev.platform_data;
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struct adp8860_bl *data = i2c_get_clientdata(client);
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struct adp8860_led *led, *led_dat;
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struct led_info *cur_led;
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int ret, i;
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led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
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if (led == NULL) {
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dev_err(&client->dev, "failed to alloc memory\n");
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return -ENOMEM;
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}
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ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law);
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ret = adp8860_write(client, ADP8860_ISCT1,
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(pdata->led_on_time & 0x3) << 6);
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ret |= adp8860_write(client, ADP8860_ISCF,
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FADE_VAL(pdata->led_fade_in, pdata->led_fade_out));
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if (ret) {
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dev_err(&client->dev, "failed to write\n");
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goto err_free;
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}
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for (i = 0; i < pdata->num_leds; ++i) {
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cur_led = &pdata->leds[i];
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led_dat = &led[i];
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led_dat->id = cur_led->flags & ADP8860_FLAG_LED_MASK;
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if (led_dat->id > 7 || led_dat->id < 1) {
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dev_err(&client->dev, "Invalid LED ID %d\n",
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led_dat->id);
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goto err;
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}
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if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) {
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dev_err(&client->dev, "LED %d used by Backlight\n",
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led_dat->id);
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goto err;
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}
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led_dat->cdev.name = cur_led->name;
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led_dat->cdev.default_trigger = cur_led->default_trigger;
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led_dat->cdev.brightness_set = adp8860_led_set;
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led_dat->cdev.brightness = LED_OFF;
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led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT;
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led_dat->client = client;
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led_dat->new_brightness = LED_OFF;
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INIT_WORK(&led_dat->work, adp8860_led_work);
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ret = led_classdev_register(&client->dev, &led_dat->cdev);
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if (ret) {
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dev_err(&client->dev, "failed to register LED %d\n",
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led_dat->id);
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goto err;
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}
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ret = adp8860_led_setup(led_dat);
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if (ret) {
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dev_err(&client->dev, "failed to write\n");
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i++;
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goto err;
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}
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}
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data->led = led;
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return 0;
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err:
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for (i = i - 1; i >= 0; --i) {
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led_classdev_unregister(&led[i].cdev);
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cancel_work_sync(&led[i].work);
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}
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err_free:
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kfree(led);
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return ret;
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}
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static int __devexit adp8860_led_remove(struct i2c_client *client)
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{
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struct adp8860_backlight_platform_data *pdata =
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client->dev.platform_data;
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struct adp8860_bl *data = i2c_get_clientdata(client);
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int i;
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for (i = 0; i < pdata->num_leds; i++) {
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led_classdev_unregister(&data->led[i].cdev);
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cancel_work_sync(&data->led[i].work);
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}
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kfree(data->led);
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return 0;
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}
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#else
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static int __devinit adp8860_led_probe(struct i2c_client *client)
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{
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return 0;
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}
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static int __devexit adp8860_led_remove(struct i2c_client *client)
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{
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return 0;
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}
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#endif
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static int adp8860_bl_set(struct backlight_device *bl, int brightness)
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{
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struct adp8860_bl *data = bl_get_data(bl);
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struct i2c_client *client = data->client;
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int ret = 0;
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if (data->pdata->en_ambl_sens) {
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if ((brightness > 0) && (brightness < ADP8860_MAX_BRIGHTNESS)) {
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/* Disable Ambient Light auto adjust */
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ret |= adp8860_clr_bits(client, ADP8860_MDCR,
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CMP_AUTOEN);
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ret |= adp8860_write(client, ADP8860_BLMX1, brightness);
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} else {
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/*
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* MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
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* restore daylight l1 sysfs brightness
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*/
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ret |= adp8860_write(client, ADP8860_BLMX1,
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data->cached_daylight_max);
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ret |= adp8860_set_bits(client, ADP8860_MDCR,
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CMP_AUTOEN);
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}
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} else
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ret |= adp8860_write(client, ADP8860_BLMX1, brightness);
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if (data->current_brightness && brightness == 0)
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ret |= adp8860_set_bits(client,
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ADP8860_MDCR, DIM_EN);
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else if (data->current_brightness == 0 && brightness)
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ret |= adp8860_clr_bits(client,
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ADP8860_MDCR, DIM_EN);
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if (!ret)
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data->current_brightness = brightness;
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return ret;
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}
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static int adp8860_bl_update_status(struct backlight_device *bl)
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{
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int brightness = bl->props.brightness;
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if (bl->props.power != FB_BLANK_UNBLANK)
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brightness = 0;
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if (bl->props.fb_blank != FB_BLANK_UNBLANK)
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brightness = 0;
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return adp8860_bl_set(bl, brightness);
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}
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static int adp8860_bl_get_brightness(struct backlight_device *bl)
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{
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struct adp8860_bl *data = bl_get_data(bl);
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return data->current_brightness;
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}
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static const struct backlight_ops adp8860_bl_ops = {
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.update_status = adp8860_bl_update_status,
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.get_brightness = adp8860_bl_get_brightness,
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};
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static int adp8860_bl_setup(struct backlight_device *bl)
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{
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struct adp8860_bl *data = bl_get_data(bl);
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struct i2c_client *client = data->client;
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struct adp8860_backlight_platform_data *pdata = data->pdata;
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int ret = 0;
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ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign);
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ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max);
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ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim);
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if (pdata->en_ambl_sens) {
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data->cached_daylight_max = pdata->l1_daylight_max;
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ret |= adp8860_write(client, ADP8860_BLMX2,
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pdata->l2_office_max);
|
||||
ret |= adp8860_write(client, ADP8860_BLDM2,
|
||||
pdata->l2_office_dim);
|
||||
ret |= adp8860_write(client, ADP8860_BLMX3,
|
||||
pdata->l3_dark_max);
|
||||
ret |= adp8860_write(client, ADP8860_BLDM3,
|
||||
pdata->l3_dark_dim);
|
||||
|
||||
ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip);
|
||||
ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst);
|
||||
ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip);
|
||||
ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst);
|
||||
ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN |
|
||||
ALS_CCFG_VAL(pdata->abml_filt));
|
||||
}
|
||||
|
||||
ret |= adp8860_write(client, ADP8860_CFGR,
|
||||
BL_CFGR_VAL(pdata->bl_fade_law, 0));
|
||||
|
||||
ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in,
|
||||
pdata->bl_fade_out));
|
||||
|
||||
ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t adp8860_show(struct device *dev, char *buf, int reg)
|
||||
{
|
||||
struct adp8860_bl *data = dev_get_drvdata(dev);
|
||||
int error;
|
||||
uint8_t reg_val;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
error = adp8860_read(data->client, reg, ®_val);
|
||||
mutex_unlock(&data->lock);
|
||||
|
||||
if (error < 0)
|
||||
return error;
|
||||
|
||||
return sprintf(buf, "%u\n", reg_val);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_store(struct device *dev, const char *buf,
|
||||
size_t count, int reg)
|
||||
{
|
||||
struct adp8860_bl *data = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
int ret;
|
||||
|
||||
ret = strict_strtoul(buf, 10, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
adp8860_write(data->client, reg, val);
|
||||
mutex_unlock(&data->lock);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp8860_show(dev, buf, ADP8860_BLMX3);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
return adp8860_store(dev, buf, count, ADP8860_BLMX3);
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show,
|
||||
adp8860_bl_l3_dark_max_store);
|
||||
|
||||
static ssize_t adp8860_bl_l2_office_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp8860_show(dev, buf, ADP8860_BLMX2);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l2_office_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
return adp8860_store(dev, buf, count, ADP8860_BLMX2);
|
||||
}
|
||||
static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show,
|
||||
adp8860_bl_l2_office_max_store);
|
||||
|
||||
static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp8860_show(dev, buf, ADP8860_BLMX1);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct adp8860_bl *data = dev_get_drvdata(dev);
|
||||
|
||||
strict_strtoul(buf, 10, &data->cached_daylight_max);
|
||||
return adp8860_store(dev, buf, count, ADP8860_BLMX1);
|
||||
}
|
||||
static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show,
|
||||
adp8860_bl_l1_daylight_max_store);
|
||||
|
||||
static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp8860_show(dev, buf, ADP8860_BLDM3);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
return adp8860_store(dev, buf, count, ADP8860_BLDM3);
|
||||
}
|
||||
static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show,
|
||||
adp8860_bl_l3_dark_dim_store);
|
||||
|
||||
static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp8860_show(dev, buf, ADP8860_BLDM2);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
return adp8860_store(dev, buf, count, ADP8860_BLDM2);
|
||||
}
|
||||
static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show,
|
||||
adp8860_bl_l2_office_dim_store);
|
||||
|
||||
static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
return adp8860_show(dev, buf, ADP8860_BLDM1);
|
||||
}
|
||||
|
||||
static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
return adp8860_store(dev, buf, count, ADP8860_BLDM1);
|
||||
}
|
||||
static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show,
|
||||
adp8860_bl_l1_daylight_dim_store);
|
||||
|
||||
#ifdef ADP8860_EXT_FEATURES
|
||||
static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct adp8860_bl *data = dev_get_drvdata(dev);
|
||||
int error;
|
||||
uint8_t reg_val;
|
||||
uint16_t ret_val;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val);
|
||||
ret_val = reg_val;
|
||||
error |= adp8860_read(data->client, ADP8860_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,
|
||||
adp8860_bl_ambient_light_level_show, NULL);
|
||||
|
||||
static ssize_t adp8860_bl_ambient_light_zone_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct adp8860_bl *data = dev_get_drvdata(dev);
|
||||
int error;
|
||||
uint8_t reg_val;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
error = adp8860_read(data->client, ADP8860_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 adp8860_bl_ambient_light_zone_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct adp8860_bl *data = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
uint8_t reg_val;
|
||||
int ret;
|
||||
|
||||
ret = strict_strtoul(buf, 10, &val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (val == 0) {
|
||||
/* Enable automatic ambient light sensing */
|
||||
adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN);
|
||||
} else if ((val > 0) && (val < 6)) {
|
||||
/* Disable automatic ambient light sensing */
|
||||
adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN);
|
||||
|
||||
/* Set user supplied ambient light zone */
|
||||
mutex_lock(&data->lock);
|
||||
adp8860_read(data->client, ADP8860_CFGR, ®_val);
|
||||
reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
|
||||
reg_val |= val << CFGR_BLV_SHIFT;
|
||||
adp8860_write(data->client, ADP8860_CFGR, reg_val);
|
||||
mutex_unlock(&data->lock);
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
static DEVICE_ATTR(ambient_light_zone, 0664,
|
||||
adp8860_bl_ambient_light_zone_show,
|
||||
adp8860_bl_ambient_light_zone_store);
|
||||
#endif
|
||||
|
||||
static struct attribute *adp8860_bl_attributes[] = {
|
||||
&dev_attr_l3_dark_max.attr,
|
||||
&dev_attr_l3_dark_dim.attr,
|
||||
&dev_attr_l2_office_max.attr,
|
||||
&dev_attr_l2_office_dim.attr,
|
||||
&dev_attr_l1_daylight_max.attr,
|
||||
&dev_attr_l1_daylight_dim.attr,
|
||||
#ifdef ADP8860_EXT_FEATURES
|
||||
&dev_attr_ambient_light_level.attr,
|
||||
&dev_attr_ambient_light_zone.attr,
|
||||
#endif
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group adp8860_bl_attr_group = {
|
||||
.attrs = adp8860_bl_attributes,
|
||||
};
|
||||
|
||||
static int __devinit adp8860_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct backlight_device *bl;
|
||||
struct adp8860_bl *data;
|
||||
struct adp8860_backlight_platform_data *pdata =
|
||||
client->dev.platform_data;
|
||||
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 = adp8860_read(client, ADP8860_MFDVID, ®_val);
|
||||
if (ret < 0)
|
||||
return -EIO;
|
||||
|
||||
if (ADP8860_MANID(reg_val) != ADP8860_MANUFID) {
|
||||
dev_err(&client->dev, "failed to probe\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
||||
if (data == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
/* It's confirmed that the DEVID field is actually a REVID */
|
||||
|
||||
data->revid = ADP8860_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);
|
||||
|
||||
bl = backlight_device_register(dev_driver_string(&client->dev),
|
||||
&client->dev, data, &adp8860_bl_ops);
|
||||
if (IS_ERR(bl)) {
|
||||
dev_err(&client->dev, "failed to register backlight\n");
|
||||
ret = PTR_ERR(bl);
|
||||
goto out2;
|
||||
}
|
||||
|
||||
bl->props.max_brightness =
|
||||
bl->props.brightness = ADP8860_MAX_BRIGHTNESS;
|
||||
|
||||
data->bl = bl;
|
||||
|
||||
if (pdata->en_ambl_sens)
|
||||
ret = sysfs_create_group(&bl->dev.kobj,
|
||||
&adp8860_bl_attr_group);
|
||||
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "failed to register sysfs\n");
|
||||
goto out1;
|
||||
}
|
||||
|
||||
ret = adp8860_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)
|
||||
adp8860_led_probe(client);
|
||||
|
||||
return 0;
|
||||
|
||||
out:
|
||||
if (data->pdata->en_ambl_sens)
|
||||
sysfs_remove_group(&data->bl->dev.kobj,
|
||||
&adp8860_bl_attr_group);
|
||||
out1:
|
||||
backlight_device_unregister(bl);
|
||||
out2:
|
||||
i2c_set_clientdata(client, NULL);
|
||||
kfree(data);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit adp8860_remove(struct i2c_client *client)
|
||||
{
|
||||
struct adp8860_bl *data = i2c_get_clientdata(client);
|
||||
|
||||
adp8860_clr_bits(client, ADP8860_MDCR, NSTBY);
|
||||
|
||||
if (data->led)
|
||||
adp8860_led_remove(client);
|
||||
|
||||
if (data->pdata->en_ambl_sens)
|
||||
sysfs_remove_group(&data->bl->dev.kobj,
|
||||
&adp8860_bl_attr_group);
|
||||
|
||||
backlight_device_unregister(data->bl);
|
||||
i2c_set_clientdata(client, NULL);
|
||||
kfree(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message)
|
||||
{
|
||||
adp8860_clr_bits(client, ADP8860_MDCR, NSTBY);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int adp8860_i2c_resume(struct i2c_client *client)
|
||||
{
|
||||
adp8860_set_bits(client, ADP8860_MDCR, NSTBY);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define adp8860_i2c_suspend NULL
|
||||
#define adp8860_i2c_resume NULL
|
||||
#endif
|
||||
|
||||
static const struct i2c_device_id adp8860_id[] = {
|
||||
{ "adp8860", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, adp8860_id);
|
||||
|
||||
static struct i2c_driver adp8860_driver = {
|
||||
.driver = {
|
||||
.name = KBUILD_MODNAME,
|
||||
},
|
||||
.probe = adp8860_probe,
|
||||
.remove = __devexit_p(adp8860_remove),
|
||||
.suspend = adp8860_i2c_suspend,
|
||||
.resume = adp8860_i2c_resume,
|
||||
.id_table = adp8860_id,
|
||||
};
|
||||
|
||||
static int __init adp8860_init(void)
|
||||
{
|
||||
return i2c_add_driver(&adp8860_driver);
|
||||
}
|
||||
module_init(adp8860_init);
|
||||
|
||||
static void __exit adp8860_exit(void)
|
||||
{
|
||||
i2c_del_driver(&adp8860_driver);
|
||||
}
|
||||
module_exit(adp8860_exit);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
||||
MODULE_DESCRIPTION("ADP8860 Backlight driver");
|
||||
MODULE_ALIAS("i2c:adp8860-backlight");
|
||||
137
include/linux/i2c/adp8860.h
Normal file
137
include/linux/i2c/adp8860.h
Normal file
@ -0,0 +1,137 @@
|
||||
/*
|
||||
* Definitions and platform data for Analog Devices
|
||||
* Backlight drivers ADP8860
|
||||
*
|
||||
* Copyright 2009-2010 Analog Devices Inc.
|
||||
*
|
||||
* Licensed under the GPL-2 or later.
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_I2C_ADP8860_H
|
||||
#define __LINUX_I2C_ADP8860_H
|
||||
|
||||
#include <linux/leds.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#define ID_ADP8860 8860
|
||||
|
||||
#define ADP8860_MAX_BRIGHTNESS 0x7F
|
||||
#define FLAG_OFFT_SHIFT 8
|
||||
|
||||
/*
|
||||
* LEDs subdevice platform data
|
||||
*/
|
||||
|
||||
#define ADP8860_LED_DIS_BLINK (0 << FLAG_OFFT_SHIFT)
|
||||
#define ADP8860_LED_OFFT_600ms (1 << FLAG_OFFT_SHIFT)
|
||||
#define ADP8860_LED_OFFT_1200ms (2 << FLAG_OFFT_SHIFT)
|
||||
#define ADP8860_LED_OFFT_1800ms (3 << FLAG_OFFT_SHIFT)
|
||||
|
||||
#define ADP8860_LED_ONT_200ms 0
|
||||
#define ADP8860_LED_ONT_600ms 1
|
||||
#define ADP8860_LED_ONT_800ms 2
|
||||
#define ADP8860_LED_ONT_1200ms 3
|
||||
|
||||
#define ADP8860_LED_D7 (7)
|
||||
#define ADP8860_LED_D6 (6)
|
||||
#define ADP8860_LED_D5 (5)
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#define ADP8860_LED_D4 (4)
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#define ADP8860_LED_D3 (3)
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#define ADP8860_LED_D2 (2)
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#define ADP8860_LED_D1 (1)
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/*
|
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* Backlight subdevice platform data
|
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*/
|
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|
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#define ADP8860_BL_D7 (1 << 6)
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#define ADP8860_BL_D6 (1 << 5)
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#define ADP8860_BL_D5 (1 << 4)
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#define ADP8860_BL_D4 (1 << 3)
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#define ADP8860_BL_D3 (1 << 2)
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#define ADP8860_BL_D2 (1 << 1)
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#define ADP8860_BL_D1 (1 << 0)
|
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#define ADP8860_FADE_T_DIS 0 /* Fade Timer Disabled */
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||||
#define ADP8860_FADE_T_300ms 1 /* 0.3 Sec */
|
||||
#define ADP8860_FADE_T_600ms 2
|
||||
#define ADP8860_FADE_T_900ms 3
|
||||
#define ADP8860_FADE_T_1200ms 4
|
||||
#define ADP8860_FADE_T_1500ms 5
|
||||
#define ADP8860_FADE_T_1800ms 6
|
||||
#define ADP8860_FADE_T_2100ms 7
|
||||
#define ADP8860_FADE_T_2400ms 8
|
||||
#define ADP8860_FADE_T_2700ms 9
|
||||
#define ADP8860_FADE_T_3000ms 10
|
||||
#define ADP8860_FADE_T_3500ms 11
|
||||
#define ADP8860_FADE_T_4000ms 12
|
||||
#define ADP8860_FADE_T_4500ms 13
|
||||
#define ADP8860_FADE_T_5000ms 14
|
||||
#define ADP8860_FADE_T_5500ms 15 /* 5.5 Sec */
|
||||
|
||||
#define ADP8860_FADE_LAW_LINEAR 0
|
||||
#define ADP8860_FADE_LAW_SQUARE 1
|
||||
#define ADP8860_FADE_LAW_CUBIC1 2
|
||||
#define ADP8860_FADE_LAW_CUBIC2 3
|
||||
|
||||
#define ADP8860_BL_AMBL_FILT_80ms 0 /* Light sensor filter time */
|
||||
#define ADP8860_BL_AMBL_FILT_160ms 1
|
||||
#define ADP8860_BL_AMBL_FILT_320ms 2
|
||||
#define ADP8860_BL_AMBL_FILT_640ms 3
|
||||
#define ADP8860_BL_AMBL_FILT_1280ms 4
|
||||
#define ADP8860_BL_AMBL_FILT_2560ms 5
|
||||
#define ADP8860_BL_AMBL_FILT_5120ms 6
|
||||
#define ADP8860_BL_AMBL_FILT_10240ms 7 /* 10.24 sec */
|
||||
|
||||
/*
|
||||
* Blacklight current 0..30mA
|
||||
*/
|
||||
#define ADP8860_BL_CUR_mA(I) ((I * 127) / 30)
|
||||
|
||||
/*
|
||||
* L2 comparator current 0..1106uA
|
||||
*/
|
||||
#define ADP8860_L2_COMP_CURR_uA(I) ((I * 255) / 1106)
|
||||
|
||||
/*
|
||||
* L3 comparator current 0..138uA
|
||||
*/
|
||||
#define ADP8860_L3_COMP_CURR_uA(I) ((I * 255) / 138)
|
||||
|
||||
struct adp8860_backlight_platform_data {
|
||||
u8 bl_led_assign; /* 1 = Backlight 0 = Individual LED */
|
||||
|
||||
u8 bl_fade_in; /* Backlight Fade-In Timer */
|
||||
u8 bl_fade_out; /* Backlight Fade-Out Timer */
|
||||
u8 bl_fade_law; /* fade-on/fade-off transfer characteristic */
|
||||
|
||||
u8 en_ambl_sens; /* 1 = enable ambient light sensor */
|
||||
u8 abml_filt; /* Light sensor filter time */
|
||||
|
||||
u8 l1_daylight_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
|
||||
u8 l1_daylight_dim; /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
|
||||
u8 l2_office_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
|
||||
u8 l2_office_dim; /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
|
||||
u8 l3_dark_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
|
||||
u8 l3_dark_dim; /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
|
||||
|
||||
u8 l2_trip; /* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
|
||||
u8 l2_hyst; /* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
|
||||
u8 l3_trip; /* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
|
||||
u8 l3_hyst; /* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
|
||||
|
||||
/**
|
||||
* Independent Current Sinks / LEDS
|
||||
* Sinks not assigned to the Backlight can be exposed to
|
||||
* user space using the LEDS CLASS interface
|
||||
*/
|
||||
|
||||
int num_leds;
|
||||
struct led_info *leds;
|
||||
u8 led_fade_in; /* LED Fade-In Timer */
|
||||
u8 led_fade_out; /* LED Fade-Out Timer */
|
||||
u8 led_fade_law; /* fade-on/fade-off transfer characteristic */
|
||||
u8 led_on_time;
|
||||
};
|
||||
|
||||
#endif /* __LINUX_I2C_ADP8860_H */
|
||||
Loading…
Reference in New Issue
Block a user