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path: root/drivers/video/backlight
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-rw-r--r--drivers/video/backlight/aat2870_bl.c2
-rw-r--r--drivers/video/backlight/adp8860_bl.c4
-rw-r--r--drivers/video/backlight/adp8870_bl.c4
-rw-r--r--drivers/video/backlight/backlight.c30
-rw-r--r--drivers/video/backlight/corgi_lcd.c4
-rw-r--r--drivers/video/backlight/gpio_backlight.c58
-rw-r--r--drivers/video/backlight/hx8357.c4
-rw-r--r--drivers/video/backlight/ili922x.c4
-rw-r--r--drivers/video/backlight/ili9320.c4
-rw-r--r--drivers/video/backlight/l4f00242t03.c5
-rw-r--r--drivers/video/backlight/lm3533_bl.c5
-rw-r--r--drivers/video/backlight/lm3639_bl.c17
-rw-r--r--drivers/video/backlight/lms283gf05.c4
-rw-r--r--drivers/video/backlight/platform_lcd.c4
-rw-r--r--drivers/video/backlight/tps65217_bl.c5
15 files changed, 91 insertions, 63 deletions
diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index ee0c0a982e4e..ec5350f2c28a 100644
--- a/drivers/video/backlight/aat2870_bl.c
+++ b/drivers/video/backlight/aat2870_bl.c
@@ -149,8 +149,6 @@ static int aat2870_bl_probe(struct platform_device *pdev)
sizeof(struct aat2870_bl_driver_data),
GFP_KERNEL);
if (!aat2870_bl) {
- dev_err(&pdev->dev,
- "Failed to allocate memory for aat2870 backlight\n");
ret = -ENOMEM;
goto out;
}
diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
index 9d656717d0f7..be8d83deca7d 100644
--- a/drivers/video/backlight/adp8860_bl.c
+++ b/drivers/video/backlight/adp8860_bl.c
@@ -224,10 +224,8 @@ static int adp8860_led_probe(struct i2c_client *client)
led = devm_kzalloc(&client->dev, sizeof(*led) * pdata->num_leds,
GFP_KERNEL);
- if (led == NULL) {
- dev_err(&client->dev, "failed to alloc memory\n");
+ if (led == NULL)
return -ENOMEM;
- }
ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law);
ret = adp8860_write(client, ADP8860_ISCT1,
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
index 63707205326b..251af4d38d86 100644
--- a/drivers/video/backlight/adp8870_bl.c
+++ b/drivers/video/backlight/adp8870_bl.c
@@ -246,10 +246,8 @@ static int adp8870_led_probe(struct i2c_client *client)
led = devm_kzalloc(&client->dev, pdata->num_leds * sizeof(*led),
GFP_KERNEL);
- if (led == NULL) {
- dev_err(&client->dev, "failed to alloc memory\n");
+ if (led == NULL)
return -ENOMEM;
- }
ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law);
if (ret)
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 5d05555fe841..bd2172c2d650 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -34,13 +34,15 @@ static const char *const backlight_types[] = {
defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE))
/* This callback gets called when something important happens inside a
* framebuffer driver. We're looking if that important event is blanking,
- * and if it is, we're switching backlight power as well ...
+ * and if it is and necessary, we're switching backlight power as well ...
*/
static int fb_notifier_callback(struct notifier_block *self,
unsigned long event, void *data)
{
struct backlight_device *bd;
struct fb_event *evdata = data;
+ int node = evdata->info->node;
+ int fb_blank = 0;
/* If we aren't interested in this event, skip it immediately ... */
if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
@@ -51,12 +53,24 @@ static int fb_notifier_callback(struct notifier_block *self,
if (bd->ops)
if (!bd->ops->check_fb ||
bd->ops->check_fb(bd, evdata->info)) {
- bd->props.fb_blank = *(int *)evdata->data;
- if (bd->props.fb_blank == FB_BLANK_UNBLANK)
- bd->props.state &= ~BL_CORE_FBBLANK;
- else
- bd->props.state |= BL_CORE_FBBLANK;
- backlight_update_status(bd);
+ fb_blank = *(int *)evdata->data;
+ if (fb_blank == FB_BLANK_UNBLANK &&
+ !bd->fb_bl_on[node]) {
+ bd->fb_bl_on[node] = true;
+ if (!bd->use_count++) {
+ bd->props.state &= ~BL_CORE_FBBLANK;
+ bd->props.fb_blank = FB_BLANK_UNBLANK;
+ backlight_update_status(bd);
+ }
+ } else if (fb_blank != FB_BLANK_UNBLANK &&
+ bd->fb_bl_on[node]) {
+ bd->fb_bl_on[node] = false;
+ if (!(--bd->use_count)) {
+ bd->props.state |= BL_CORE_FBBLANK;
+ bd->props.fb_blank = fb_blank;
+ backlight_update_status(bd);
+ }
+ }
}
mutex_unlock(&bd->ops_lock);
return 0;
@@ -333,7 +347,7 @@ struct backlight_device *backlight_device_register(const char *name,
rc = device_register(&new_bd->dev);
if (rc) {
- kfree(new_bd);
+ put_device(&new_bd->dev);
return ERR_PTR(rc);
}
diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c
index db8db5fa6583..51d18d637e2b 100644
--- a/drivers/video/backlight/corgi_lcd.c
+++ b/drivers/video/backlight/corgi_lcd.c
@@ -543,10 +543,8 @@ static int corgi_lcd_probe(struct spi_device *spi)
}
lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL);
- if (!lcd) {
- dev_err(&spi->dev, "failed to allocate memory\n");
+ if (!lcd)
return -ENOMEM;
- }
lcd->spi_dev = spi;
diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c
index 81fb12770c2a..a2eba12e1cb7 100644
--- a/drivers/video/backlight/gpio_backlight.c
+++ b/drivers/video/backlight/gpio_backlight.c
@@ -13,6 +13,8 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <linux/platform_data/gpio_backlight.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -23,6 +25,7 @@ struct gpio_backlight {
int gpio;
int active;
+ int def_value;
};
static int gpio_backlight_update_status(struct backlight_device *bl)
@@ -60,6 +63,29 @@ static const struct backlight_ops gpio_backlight_ops = {
.check_fb = gpio_backlight_check_fb,
};
+static int gpio_backlight_probe_dt(struct platform_device *pdev,
+ struct gpio_backlight *gbl)
+{
+ struct device_node *np = pdev->dev.of_node;
+ enum of_gpio_flags gpio_flags;
+
+ gbl->gpio = of_get_gpio_flags(np, 0, &gpio_flags);
+
+ if (!gpio_is_valid(gbl->gpio)) {
+ if (gbl->gpio != -EPROBE_DEFER) {
+ dev_err(&pdev->dev,
+ "Error: The gpios parameter is missing or invalid.\n");
+ }
+ return gbl->gpio;
+ }
+
+ gbl->active = (gpio_flags & OF_GPIO_ACTIVE_LOW) ? 0 : 1;
+
+ gbl->def_value = of_property_read_bool(np, "default-on");
+
+ return 0;
+}
+
static int gpio_backlight_probe(struct platform_device *pdev)
{
struct gpio_backlight_platform_data *pdata =
@@ -67,10 +93,12 @@ static int gpio_backlight_probe(struct platform_device *pdev)
struct backlight_properties props;
struct backlight_device *bl;
struct gpio_backlight *gbl;
+ struct device_node *np = pdev->dev.of_node;
int ret;
- if (!pdata) {
- dev_err(&pdev->dev, "failed to find platform data\n");
+ if (!pdata && !np) {
+ dev_err(&pdev->dev,
+ "failed to find platform data or device tree node.\n");
return -ENODEV;
}
@@ -79,14 +107,22 @@ static int gpio_backlight_probe(struct platform_device *pdev)
return -ENOMEM;
gbl->dev = &pdev->dev;
- gbl->fbdev = pdata->fbdev;
- gbl->gpio = pdata->gpio;
- gbl->active = pdata->active_low ? 0 : 1;
+
+ if (np) {
+ ret = gpio_backlight_probe_dt(pdev, gbl);
+ if (ret)
+ return ret;
+ } else {
+ gbl->fbdev = pdata->fbdev;
+ gbl->gpio = pdata->gpio;
+ gbl->active = pdata->active_low ? 0 : 1;
+ gbl->def_value = pdata->def_value;
+ }
ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT |
(gbl->active ? GPIOF_INIT_LOW
: GPIOF_INIT_HIGH),
- pdata->name);
+ pdata ? pdata->name : "backlight");
if (ret < 0) {
dev_err(&pdev->dev, "unable to request GPIO\n");
return ret;
@@ -103,17 +139,25 @@ static int gpio_backlight_probe(struct platform_device *pdev)
return PTR_ERR(bl);
}
- bl->props.brightness = pdata->def_value;
+ bl->props.brightness = gbl->def_value;
backlight_update_status(bl);
platform_set_drvdata(pdev, bl);
return 0;
}
+#ifdef CONFIG_OF
+static struct of_device_id gpio_backlight_of_match[] = {
+ { .compatible = "gpio-backlight" },
+ { /* sentinel */ }
+};
+#endif
+
static struct platform_driver gpio_backlight_driver = {
.driver = {
.name = "gpio-backlight",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(gpio_backlight_of_match),
},
.probe = gpio_backlight_probe,
};
diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
index 985e854e244b..23f50b92a930 100644
--- a/drivers/video/backlight/hx8357.c
+++ b/drivers/video/backlight/hx8357.c
@@ -587,10 +587,8 @@ static int hx8357_probe(struct spi_device *spi)
int i, ret;
lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
- if (!lcd) {
- dev_err(&spi->dev, "Couldn't allocate lcd internal structure!\n");
+ if (!lcd)
return -ENOMEM;
- }
ret = spi_setup(spi);
if (ret < 0) {
diff --git a/drivers/video/backlight/ili922x.c b/drivers/video/backlight/ili922x.c
index 73464e4b4c74..ea67fe199e34 100644
--- a/drivers/video/backlight/ili922x.c
+++ b/drivers/video/backlight/ili922x.c
@@ -482,10 +482,8 @@ static int ili922x_probe(struct spi_device *spi)
u16 reg = 0;
ili = devm_kzalloc(&spi->dev, sizeof(*ili), GFP_KERNEL);
- if (!ili) {
- dev_err(&spi->dev, "cannot alloc priv data\n");
+ if (!ili)
return -ENOMEM;
- }
ili->spi = spi;
spi_set_drvdata(spi, ili);
diff --git a/drivers/video/backlight/ili9320.c b/drivers/video/backlight/ili9320.c
index e2b8b40a9bd9..2cf39e6d519d 100644
--- a/drivers/video/backlight/ili9320.c
+++ b/drivers/video/backlight/ili9320.c
@@ -219,10 +219,8 @@ int ili9320_probe_spi(struct spi_device *spi,
/* allocate and initialse our state */
ili = devm_kzalloc(&spi->dev, sizeof(struct ili9320), GFP_KERNEL);
- if (ili == NULL) {
- dev_err(dev, "no memory for device\n");
+ if (ili == NULL)
return -ENOMEM;
- }
ili->access.spi.id = ILI9320_SPI_IDCODE | ILI9320_SPI_ID(1);
diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c
index 63e763828e0e..5fa2649c9631 100644
--- a/drivers/video/backlight/l4f00242t03.c
+++ b/drivers/video/backlight/l4f00242t03.c
@@ -181,11 +181,8 @@ static int l4f00242t03_probe(struct spi_device *spi)
priv = devm_kzalloc(&spi->dev, sizeof(struct l4f00242t03_priv),
GFP_KERNEL);
-
- if (priv == NULL) {
- dev_err(&spi->dev, "No memory for this device.\n");
+ if (priv == NULL)
return -ENOMEM;
- }
spi_set_drvdata(spi, priv);
spi->bits_per_word = 9;
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 187d1c283c1d..cff1fbe89a1b 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -296,11 +296,8 @@ static int lm3533_bl_probe(struct platform_device *pdev)
}
bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL);
- if (!bl) {
- dev_err(&pdev->dev,
- "failed to allocate memory for backlight\n");
+ if (!bl)
return -ENOMEM;
- }
bl->lm3533 = lm3533;
bl->id = pdev->id;
diff --git a/drivers/video/backlight/lm3639_bl.c b/drivers/video/backlight/lm3639_bl.c
index 6fd60adf922e..5f36808d214f 100644
--- a/drivers/video/backlight/lm3639_bl.c
+++ b/drivers/video/backlight/lm3639_bl.c
@@ -349,8 +349,9 @@ static int lm3639_probe(struct i2c_client *client,
props.brightness = pdata->init_brt_led;
props.max_brightness = pdata->max_brt_led;
pchip->bled =
- backlight_device_register("lm3639_bled", pchip->dev, pchip,
- &lm3639_bled_ops, &props);
+ devm_backlight_device_register(pchip->dev, "lm3639_bled",
+ pchip->dev, pchip, &lm3639_bled_ops,
+ &props);
if (IS_ERR(pchip->bled)) {
dev_err(&client->dev, "fail : backlight register\n");
ret = PTR_ERR(pchip->bled);
@@ -360,7 +361,7 @@ static int lm3639_probe(struct i2c_client *client,
ret = device_create_file(&(pchip->bled->dev), &dev_attr_bled_mode);
if (ret < 0) {
dev_err(&client->dev, "failed : add sysfs entries\n");
- goto err_bled_mode;
+ goto err_out;
}
/* flash */
@@ -391,8 +392,6 @@ err_torch:
led_classdev_unregister(&pchip->cdev_flash);
err_flash:
device_remove_file(&(pchip->bled->dev), &dev_attr_bled_mode);
-err_bled_mode:
- backlight_device_unregister(pchip->bled);
err_out:
return ret;
}
@@ -407,10 +406,8 @@ static int lm3639_remove(struct i2c_client *client)
led_classdev_unregister(&pchip->cdev_torch);
if (&pchip->cdev_flash)
led_classdev_unregister(&pchip->cdev_flash);
- if (pchip->bled) {
+ if (pchip->bled)
device_remove_file(&(pchip->bled->dev), &dev_attr_bled_mode);
- backlight_device_unregister(pchip->bled);
- }
return 0;
}
@@ -432,6 +429,6 @@ static struct i2c_driver lm3639_i2c_driver = {
module_i2c_driver(lm3639_i2c_driver);
MODULE_DESCRIPTION("Texas Instruments Backlight+Flash LED driver for LM3639");
-MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
-MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
+MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
+MODULE_AUTHOR("Ldd Mlp <ldd-mlp@list.ti.com>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c
index de8832504f68..14590c54aedf 100644
--- a/drivers/video/backlight/lms283gf05.c
+++ b/drivers/video/backlight/lms283gf05.c
@@ -168,10 +168,8 @@ static int lms283gf05_probe(struct spi_device *spi)
st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state),
GFP_KERNEL);
- if (st == NULL) {
- dev_err(&spi->dev, "No memory for device state\n");
+ if (st == NULL)
return -ENOMEM;
- }
ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st,
&lms_ops);
diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c
index d01884d4f1bf..c3d2e209fc8f 100644
--- a/drivers/video/backlight/platform_lcd.c
+++ b/drivers/video/backlight/platform_lcd.c
@@ -94,10 +94,8 @@ static int platform_lcd_probe(struct platform_device *pdev)
plcd = devm_kzalloc(&pdev->dev, sizeof(struct platform_lcd),
GFP_KERNEL);
- if (!plcd) {
- dev_err(dev, "no memory for state\n");
+ if (!plcd)
return -ENOMEM;
- }
plcd->us = dev;
plcd->pdata = pdata;
diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c
index cbba37e6836e..595dcf561020 100644
--- a/drivers/video/backlight/tps65217_bl.c
+++ b/drivers/video/backlight/tps65217_bl.c
@@ -200,7 +200,6 @@ tps65217_bl_parse_dt(struct platform_device *pdev)
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
- dev_err(&pdev->dev, "failed to allocate platform data\n");
err = ERR_PTR(-ENOMEM);
goto err;
}
@@ -296,10 +295,8 @@ static int tps65217_bl_probe(struct platform_device *pdev)
tps65217_bl = devm_kzalloc(&pdev->dev, sizeof(*tps65217_bl),
GFP_KERNEL);
- if (tps65217_bl == NULL) {
- dev_err(&pdev->dev, "allocation of struct tps65217_bl failed\n");
+ if (tps65217_bl == NULL)
return -ENOMEM;
- }
tps65217_bl->tps = tps;
tps65217_bl->dev = &pdev->dev;
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-25 20:36:46 +0300