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-rw-r--r--arch/arm/mach-s3c2442/mach-gta02.c81
-rw-r--r--drivers/mfd/pcf50633-core.c11
-rw-r--r--drivers/video/backlight/Kconfig7
-rw-r--r--drivers/video/backlight/Makefile1
-rw-r--r--drivers/video/backlight/pcf50633-backlight.c185
-rw-r--r--include/linux/mfd/pcf50633/backlight.h44
-rw-r--r--include/linux/mfd/pcf50633/core.h4
7 files changed, 258 insertions, 75 deletions
diff --git a/arch/arm/mach-s3c2442/mach-gta02.c b/arch/arm/mach-s3c2442/mach-gta02.c
index c9ea3511870..d367b6f7e5d 100644
--- a/arch/arm/mach-s3c2442/mach-gta02.c
+++ b/arch/arm/mach-s3c2442/mach-gta02.c
@@ -50,7 +50,6 @@
#include <linux/io.h>
#include <linux/i2c.h>
-#include <linux/backlight.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/pcf50633/core.h>
@@ -58,6 +57,7 @@
#include <linux/mfd/pcf50633/adc.h>
#include <linux/mfd/pcf50633/gpio.h>
#include <linux/mfd/pcf50633/pmic.h>
+#include <linux/mfd/pcf50633/backlight.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
@@ -468,6 +468,12 @@ static struct regulator_consumer_supply ldo6_consumers[] = {
};
#endif
+static struct pcf50633_bl_platform_data gta02_backlight_data = {
+ .default_brightness = 0x3f,
+ .default_brightness_limit = 0,
+ .ramp_time = 3,
+};
+
struct pcf50633_platform_data gta02_pcf_pdata = {
.resumers = {
[0] = PCF50633_INT1_USBINS |
@@ -485,6 +491,8 @@ struct pcf50633_platform_data gta02_pcf_pdata = {
.chg_ref_current_ma = 1000,
+ .backlight_data = &gta02_backlight_data,
+
.reg_init_data = {
[PCF50633_REGULATOR_AUTO] = {
.constraints = {
@@ -747,67 +755,6 @@ const static struct s3c2410_ts_mach_info gta02_ts_cfg = {
};
-static void gta02_bl_set_intensity(int intensity)
-{
- struct pcf50633 *pcf = gta02_pcf;
- int old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
-
- /* We map 8-bit intensity to 6-bit intensity in hardware. */
- intensity >>= 2;
-
- /*
- * This can happen during, eg, print of panic on blanked console,
- * but we can't service i2c without interrupts active, so abort.
- */
- if (in_atomic()) {
- printk(KERN_ERR "gta02_bl_set_intensity called while atomic\n");
- return;
- }
-
- old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
- if (intensity == old_intensity)
- return;
-
- /* We can't do this anywhere else. */
- pcf50633_reg_write(pcf, PCF50633_REG_LEDDIM, 5);
-
- if (!(pcf50633_reg_read(pcf, PCF50633_REG_LEDENA) & 3))
- old_intensity = 0;
-
- /*
- * The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
- * if seen, you have to re-enable the LED unit.
- */
- if (!intensity || !old_intensity)
- pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0);
-
- /* Illegal to set LEDOUT to 0. */
- if (!intensity)
- pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
- else
- pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
- intensity);
-
- if (intensity)
- pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 2);
-
-}
-
-static struct generic_bl_info gta02_bl_info = {
- .name = "gta02-bl",
- .max_intensity = 0xff,
- .default_intensity = 0xff,
- .set_bl_intensity = gta02_bl_set_intensity,
-};
-
-static struct platform_device gta02_bl_dev = {
- .name = "generic-bl",
- .id = 1,
- .dev = {
- .platform_data = &gta02_bl_info,
- },
-};
-
/* USB */
static struct s3c2410_hcd_info gta02_usb_info = {
.port[0] = {
@@ -881,15 +828,7 @@ static struct platform_device gta02_leds_device = {
/* JBT6k74 display controller */
static void gta02_jbt6k74_probe_completed(struct device *dev)
{
- struct pcf50633 *pcf = gta02_pcf;
- /* Switch on backlight. Qi does not do it for us */
- pcf50633_reg_write(pcf, PCF50633_REG_LEDOUT, 0x01);
- pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0x00);
- pcf50633_reg_write(pcf, PCF50633_REG_LEDDIM, 0x01);
- pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0x01);
-
- gta02_bl_dev.dev.parent = dev;
- platform_device_register(&gta02_bl_dev);
+ pcf50633_bl_set_brightness_limit(gta02_pcf, 0x3f);
}
const struct jbt6k74_platform_data jbt6k74_pdata = {
diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index 1d5e5212d81..41ac3a52df1 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -353,18 +353,18 @@ static void pcf50633_irq_worker(struct work_struct *work)
if (pcf_int[0] & (PCF50633_INT1_USBINS | PCF50633_INT1_USBREM)) {
chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
if (chgstat & (0x3 << 4))
- pcf_int[0] &= ~(1 << PCF50633_INT1_USBREM);
+ pcf_int[0] &= ~PCF50633_INT1_USBREM;
else
- pcf_int[0] &= ~(1 << PCF50633_INT1_USBINS);
+ pcf_int[0] &= ~PCF50633_INT1_USBINS;
}
/* Make sure only one of ADPINS or ADPREM is set */
if (pcf_int[0] & (PCF50633_INT1_ADPINS | PCF50633_INT1_ADPREM)) {
chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
if (chgstat & (0x3 << 4))
- pcf_int[0] &= ~(1 << PCF50633_INT1_ADPREM);
+ pcf_int[0] &= ~PCF50633_INT1_ADPREM;
else
- pcf_int[0] &= ~(1 << PCF50633_INT1_ADPINS);
+ pcf_int[0] &= ~PCF50633_INT1_ADPINS;
}
dev_dbg(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x "
@@ -619,6 +619,9 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
&pcf->mbc_pdev);
pcf50633_client_dev_register(pcf, "pcf50633-adc",
&pcf->adc_pdev);
+ pcf50633_client_dev_register(pcf, "pcf50633-backlight",
+ &pcf->bl_pdev);
+
for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
struct platform_device *pdev;
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 0eb77333c83..3e9923c1735 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -243,3 +243,10 @@ config BACKLIGHT_SAHARA
help
If you have a Tabletkiosk Sahara Touch-iT, say y to enable the
backlight driver.
+
+config BACKLIGHT_PCF50633
+ tristate "Backlight driver for NXP PCF50533 MFD"
+ depends on MFD_PCF50633
+ help
+ If you have a backlight driven by a NXP PCF50633 MFD, say Y here to
+ enable its driver.
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 13db30f415f..63de1884d90 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -25,4 +25,5 @@ obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o
obj-$(CONFIG_BACKLIGHT_MBP_NVIDIA) += mbp_nvidia_bl.o
obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o
obj-$(CONFIG_BACKLIGHT_SAHARA) += kb3886_bl.o
+obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o
diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c
new file mode 100644
index 00000000000..10b9c31bc43
--- /dev/null
+++ b/drivers/video/backlight/pcf50633-backlight.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ * PCF50633 backlight device driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/mfd/pcf50633/backlight.h>
+
+struct pcf50633_bl {
+ struct pcf50633 *pcf;
+ struct backlight_device *bl;
+
+ unsigned int brightness;
+ unsigned int brightness_limit;
+};
+
+/*
+ * pcf50633_bl_set_brightness_limit
+ *
+ * Update the brightness limit for the pc50633 backlight. The actuall brightness
+ * will not go above the limit. This is useful to limit power drain for example
+ * on low battery.
+ *
+ * @dev: Pointer to a pcf50633 device
+ * @limit: The brightness limit. Valid values are 0-63
+ */
+int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit)
+{
+ struct pcf50633_bl *pcf_bl = platform_get_drvdata(pcf->bl_pdev);
+
+ if (!pcf_bl)
+ return -ENODEV;
+
+ pcf_bl->brightness_limit = limit & 0x3f;
+ backlight_update_status(pcf_bl->bl);
+
+ return 0;
+}
+
+static int pcf50633_bl_update_status(struct backlight_device *bl)
+{
+ struct pcf50633_bl *pcf_bl = bl_get_data(bl);
+ unsigned int new_brightness;
+
+
+ if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK) ||
+ bl->props.power != FB_BLANK_UNBLANK)
+ new_brightness = 0;
+ else if (bl->props.brightness < pcf_bl->brightness_limit)
+ new_brightness = bl->props.brightness;
+ else
+ new_brightness = pcf_bl->brightness_limit;
+
+
+ if (pcf_bl->brightness == new_brightness)
+ return 0;
+
+ if (new_brightness) {
+ pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDOUT,
+ new_brightness);
+ if (!pcf_bl->brightness)
+ pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 1);
+ } else {
+ pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDENA, 0);
+ }
+
+ pcf_bl->brightness = new_brightness;
+
+ return 0;
+}
+
+static int pcf50633_bl_get_brightness(struct backlight_device *bl)
+{
+ struct pcf50633_bl *pcf_bl = bl_get_data(bl);
+ return pcf_bl->brightness;
+}
+
+static struct backlight_ops pcf50633_bl_ops = {
+ .get_brightness = pcf50633_bl_get_brightness,
+ .update_status = pcf50633_bl_update_status,
+ .options = BL_CORE_SUSPENDRESUME,
+};
+
+static int __devinit pcf50633_bl_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct pcf50633_bl *pcf_bl;
+ struct pcf50633_platform_data *pcf50633_data = pdev->dev.parent->platform_data;
+ struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data;
+
+ pcf_bl = kzalloc(sizeof(*pcf_bl), GFP_KERNEL);
+ if (!pcf_bl)
+ return -ENOMEM;
+
+ pcf_bl->pcf = dev_to_pcf50633(pdev->dev.parent);
+
+ pcf_bl->bl = backlight_device_register(pdev->name, &pdev->dev, pcf_bl,
+ &pcf50633_bl_ops);
+
+ if (IS_ERR(pcf_bl->bl)) {
+ ret = PTR_ERR(pcf_bl->bl);
+ goto err_free;
+ }
+
+ platform_set_drvdata(pdev, pcf_bl);
+
+ pcf_bl->bl->props.max_brightness = 0x3f;
+ pcf_bl->bl->props.power = FB_BLANK_UNBLANK;
+
+ if (pdata) {
+ pcf_bl->bl->props.brightness = pdata->default_brightness;
+ pcf_bl->brightness_limit = pdata->default_brightness_limit;
+ } else {
+ pcf_bl->bl->props.brightness = 0x3f;
+ pcf_bl->brightness_limit = 0x3f;
+ }
+
+ pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time);
+
+ /* Should be different from props.brightness, so we don't
+ * update_status early the first time it's called */
+ pcf_bl->brightness = pcf_bl->bl->props.brightness + 1;
+
+ backlight_update_status(pcf_bl->bl);
+
+ return 0;
+
+err_free:
+ kfree(pcf_bl);
+
+ return ret;
+}
+
+static int __devexit pcf50633_bl_remove(struct platform_device *pdev)
+{
+ struct pcf50633_bl *pcf_bl = platform_get_drvdata(pdev);
+
+ backlight_device_unregister(pcf_bl->bl);
+
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(pcf_bl);
+
+ return 0;
+}
+
+static struct platform_driver pcf50633_bl_driver = {
+ .probe = pcf50633_bl_probe,
+ .remove = __devexit_p(pcf50633_bl_remove),
+ .driver = {
+ .name = "pcf50633-backlight",
+ },
+};
+
+static int __init pcf50633_bl_init(void)
+{
+ return platform_driver_register(&pcf50633_bl_driver);
+}
+module_init(pcf50633_bl_init);
+
+static void __exit pcf50633_bl_exit(void)
+{
+ platform_driver_unregister(&pcf50633_bl_driver);
+}
+module_exit(pcf50633_bl_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("PCF50633 backlight driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50633-backlight");
diff --git a/include/linux/mfd/pcf50633/backlight.h b/include/linux/mfd/pcf50633/backlight.h
new file mode 100644
index 00000000000..9d3646af056
--- /dev/null
+++ b/include/linux/mfd/pcf50633/backlight.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ * PCF50633 backlight device driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef __LINUX_MFD_PCF50633_BACKLIGHT
+#define __LINUX_MFD_PCF50633_BACKLIGHT
+
+/*
+* @default_brightness: Brightness to be used after the driver has been
+ probed. Valid range 0-63.
+* @default_brightness_limit: Brightness limit to be used after the driver has
+* been probed. This is usfull when it is not known
+* how much power is available for the backlight
+* during probe. Valid range 0-63
+* @ramp_time: When changing the backlights brightness the change
+* is not instant, instead it fades smooth from one
+* state to another. This value specifies how long the
+* fade should take. The lower the value the higher
+* the fade time. Valid range 0-255
+*/
+struct pcf50633_bl_platform_data {
+ unsigned int default_brightness;
+ unsigned int default_brightness_limit;
+ uint8_t ramp_time;
+};
+
+
+struct pcf50633;
+
+int pcf50633_bl_set_brightness_limit(struct pcf50633 *pcf, unsigned int limit);
+
+#endif
+
diff --git a/include/linux/mfd/pcf50633/core.h b/include/linux/mfd/pcf50633/core.h
index e304238dbc5..42f9af553ed 100644
--- a/include/linux/mfd/pcf50633/core.h
+++ b/include/linux/mfd/pcf50633/core.h
@@ -18,6 +18,7 @@
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/power_supply.h>
+#include <linux/mfd/pcf50633/backlight.h>
struct pcf50633;
@@ -38,6 +39,8 @@ struct pcf50633_platform_data {
void (*force_shutdown)(struct pcf50633 *);
u8 resumers[5];
+
+ struct pcf50633_bl_platform_data *backlight_data;
};
struct pcf50633_irq {
@@ -147,6 +150,7 @@ struct pcf50633 {
struct platform_device *mbc_pdev;
struct platform_device *adc_pdev;
struct platform_device *input_pdev;
+ struct platform_device *bl_pdev;
struct platform_device *regulator_pdev[PCF50633_NUM_REGULATORS];
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 08:37:09 +0000