backlight: adp8860: add support for ADP8861 & ADP8863
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>hifive-unleashed-5.1
Michael Hennerich
Richard Purdie
parent
ed601fa467
commit
c7c06d8a95
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@ -275,13 +275,13 @@ config BACKLIGHT_ADP5520
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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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tristate "Backlight Driver for ADP8860/ADP8861/ADP8863 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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If you have a LCD backlight connected to the ADP8860, ADP8861 or
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ADP8863 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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@ -62,7 +62,9 @@
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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 ADP8861_MANUFID 0x4 /* Analog Devices ADP8861 Manufacturer ID */
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#define ADP8863_MANUFID 0x2 /* Analog Devices ADP8863 Manufacturer 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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@ -70,6 +72,7 @@
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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 GDWN_DIS (1 << 3)
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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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@ -86,6 +89,12 @@
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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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enum {
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adp8860,
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adp8861,
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adp8863
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};
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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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@ -105,6 +114,8 @@ struct adp8860_bl {
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int id;
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int revid;
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int current_brightness;
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unsigned en_ambl_sens:1;
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unsigned gdwn_dis:1;
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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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@ -121,7 +132,6 @@ static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val)
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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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@ -321,7 +331,7 @@ static int adp8860_bl_set(struct backlight_device *bl, int brightness)
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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 (data->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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@ -388,7 +398,7 @@ static int adp8860_bl_setup(struct backlight_device *bl)
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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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if (data->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);
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@ -413,7 +423,8 @@ static int adp8860_bl_setup(struct backlight_device *bl)
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ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in,
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pdata->bl_fade_out));
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ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY);
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ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY |
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(data->gdwn_dis ? GDWN_DIS : 0));
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return ret;
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}
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@ -663,19 +674,29 @@ static int __devinit adp8860_probe(struct i2c_client *client,
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return -EINVAL;
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}
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ret = adp8860_read(client, ADP8860_MFDVID, ®_val);
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if (ret < 0)
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return -EIO;
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if (ADP8860_MANID(reg_val) != ADP8860_MANUFID) {
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dev_err(&client->dev, "failed to probe\n");
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return -ENODEV;
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}
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (data == NULL)
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return -ENOMEM;
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ret = adp8860_read(client, ADP8860_MFDVID, ®_val);
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if (ret < 0)
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goto out2;
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switch (ADP8860_MANID(reg_val)) {
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case ADP8863_MANUFID:
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data->gdwn_dis = !!pdata->gdwn_dis;
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case ADP8860_MANUFID:
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data->en_ambl_sens = !!pdata->en_ambl_sens;
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break;
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case ADP8861_MANUFID:
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data->gdwn_dis = !!pdata->gdwn_dis;
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break;
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default:
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dev_err(&client->dev, "failed to probe\n");
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ret = -ENODEV;
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goto out2;
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}
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/* It's confirmed that the DEVID field is actually a REVID */
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data->revid = ADP8860_DEVID(reg_val);
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@ -703,7 +724,7 @@ static int __devinit adp8860_probe(struct i2c_client *client,
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data->bl = bl;
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if (pdata->en_ambl_sens)
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if (data->en_ambl_sens)
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ret = sysfs_create_group(&bl->dev.kobj,
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&adp8860_bl_attr_group);
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@ -720,7 +741,8 @@ static int __devinit adp8860_probe(struct i2c_client *client,
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backlight_update_status(bl);
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dev_info(&client->dev, "Rev.%d Backlight\n", data->revid);
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dev_info(&client->dev, "%s Rev.%d Backlight\n",
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client->name, data->revid);
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if (pdata->num_leds)
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adp8860_led_probe(client);
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@ -728,7 +750,7 @@ static int __devinit adp8860_probe(struct i2c_client *client,
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return 0;
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out:
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if (data->pdata->en_ambl_sens)
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if (data->en_ambl_sens)
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sysfs_remove_group(&data->bl->dev.kobj,
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&adp8860_bl_attr_group);
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out1:
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@ -749,7 +771,7 @@ static int __devexit adp8860_remove(struct i2c_client *client)
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if (data->led)
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adp8860_led_remove(client);
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if (data->pdata->en_ambl_sens)
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if (data->en_ambl_sens)
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sysfs_remove_group(&data->bl->dev.kobj,
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&adp8860_bl_attr_group);
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@ -780,7 +802,9 @@ static int adp8860_i2c_resume(struct i2c_client *client)
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#endif
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static const struct i2c_device_id adp8860_id[] = {
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{ "adp8860", 0 },
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{ "adp8860", adp8860 },
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{ "adp8861", adp8861 },
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{ "adp8863", adp8863 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adp8860_id);
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@ -132,6 +132,23 @@ struct adp8860_backlight_platform_data {
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u8 led_fade_out; /* LED Fade-Out Timer */
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u8 led_fade_law; /* fade-on/fade-off transfer characteristic */
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u8 led_on_time;
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/**
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* Gain down disable. Setting this option does not allow the
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* charge pump to switch to lower gains. NOT AVAILABLE on ADP8860
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* 1 = the charge pump doesn't switch down in gain until all LEDs are 0.
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* The charge pump switches up in gain as needed. This feature is
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* useful if the ADP8863 charge pump is used to drive an external load.
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* This feature must be used when utilizing small fly capacitors
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* (0402 or smaller).
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* 0 = the charge pump automatically switches up and down in gain.
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* This provides optimal efficiency, but is not suitable for driving
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* loads that are not connected through the ADP8863 diode drivers.
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* Additionally, the charge pump fly capacitors should be low ESR
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* and sized 0603 or greater.
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*/
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u8 gdwn_dis;
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};
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#endif /* __LINUX_I2C_ADP8860_H */
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