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path: root/drivers/video/backlight/s6e63m0.c
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Diffstat (limited to 'drivers/video/backlight/s6e63m0.c')
-rw-r--r--drivers/video/backlight/s6e63m0.c235
1 files changed, 88 insertions, 147 deletions
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c
index 5927db0da99..2d6d48196c6 100644
--- a/drivers/video/backlight/s6e63m0.c
+++ b/drivers/video/backlight/s6e63m0.c
@@ -9,27 +9,19 @@
* 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.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-#include <linux/wait.h>
-#include <linux/fb.h>
+#include <linux/backlight.h>
#include <linux/delay.h>
+#include <linux/fb.h>
#include <linux/gpio.h>
-#include <linux/spi/spi.h>
-#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/lcd.h>
-#include <linux/backlight.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/wait.h>
#include "s6e63m0_gamma.h"
@@ -42,8 +34,6 @@
#define MIN_BRIGHTNESS 0
#define MAX_BRIGHTNESS 10
-#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
-
struct s6e63m0 {
struct device *dev;
struct spi_device *spi;
@@ -56,7 +46,7 @@ struct s6e63m0 {
struct lcd_platform_data *lcd_pd;
};
-static const unsigned short SEQ_PANEL_CONDITION_SET[] = {
+static const unsigned short seq_panel_condition_set[] = {
0xF8, 0x01,
DATA_ONLY, 0x27,
DATA_ONLY, 0x27,
@@ -75,7 +65,7 @@ static const unsigned short SEQ_PANEL_CONDITION_SET[] = {
ENDDEF, 0x0000
};
-static const unsigned short SEQ_DISPLAY_CONDITION_SET[] = {
+static const unsigned short seq_display_condition_set[] = {
0xf2, 0x02,
DATA_ONLY, 0x03,
DATA_ONLY, 0x1c,
@@ -89,7 +79,7 @@ static const unsigned short SEQ_DISPLAY_CONDITION_SET[] = {
ENDDEF, 0x0000
};
-static const unsigned short SEQ_GAMMA_SETTING[] = {
+static const unsigned short seq_gamma_setting[] = {
0xfa, 0x00,
DATA_ONLY, 0x18,
DATA_ONLY, 0x08,
@@ -118,7 +108,7 @@ static const unsigned short SEQ_GAMMA_SETTING[] = {
ENDDEF, 0x0000
};
-static const unsigned short SEQ_ETC_CONDITION_SET[] = {
+static const unsigned short seq_etc_condition_set[] = {
0xf6, 0x00,
DATA_ONLY, 0x8c,
DATA_ONLY, 0x07,
@@ -317,47 +307,47 @@ static const unsigned short SEQ_ETC_CONDITION_SET[] = {
ENDDEF, 0x0000
};
-static const unsigned short SEQ_ACL_ON[] = {
+static const unsigned short seq_acl_on[] = {
/* ACL on */
0xc0, 0x01,
ENDDEF, 0x0000
};
-static const unsigned short SEQ_ACL_OFF[] = {
+static const unsigned short seq_acl_off[] = {
/* ACL off */
0xc0, 0x00,
ENDDEF, 0x0000
};
-static const unsigned short SEQ_ELVSS_ON[] = {
+static const unsigned short seq_elvss_on[] = {
/* ELVSS on */
0xb1, 0x0b,
ENDDEF, 0x0000
};
-static const unsigned short SEQ_ELVSS_OFF[] = {
+static const unsigned short seq_elvss_off[] = {
/* ELVSS off */
0xb1, 0x0a,
ENDDEF, 0x0000
};
-static const unsigned short SEQ_STAND_BY_OFF[] = {
+static const unsigned short seq_stand_by_off[] = {
0x11, COMMAND_ONLY,
ENDDEF, 0x0000
};
-static const unsigned short SEQ_STAND_BY_ON[] = {
+static const unsigned short seq_stand_by_on[] = {
0x10, COMMAND_ONLY,
ENDDEF, 0x0000
};
-static const unsigned short SEQ_DISPLAY_ON[] = {
+static const unsigned short seq_display_on[] = {
0x29, COMMAND_ONLY,
ENDDEF, 0x0000
@@ -405,8 +395,9 @@ static int s6e63m0_panel_send_sequence(struct s6e63m0 *lcd,
ret = s6e63m0_spi_write(lcd, wbuf[i], wbuf[i+1]);
if (ret)
break;
- } else
- udelay(wbuf[i+1]*1000);
+ } else {
+ msleep(wbuf[i+1]);
+ }
i += 2;
}
@@ -456,12 +447,12 @@ static int s6e63m0_ldi_init(struct s6e63m0 *lcd)
{
int ret, i;
const unsigned short *init_seq[] = {
- SEQ_PANEL_CONDITION_SET,
- SEQ_DISPLAY_CONDITION_SET,
- SEQ_GAMMA_SETTING,
- SEQ_ETC_CONDITION_SET,
- SEQ_ACL_ON,
- SEQ_ELVSS_ON,
+ seq_panel_condition_set,
+ seq_display_condition_set,
+ seq_gamma_setting,
+ seq_etc_condition_set,
+ seq_acl_on,
+ seq_elvss_on,
};
for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
@@ -477,8 +468,8 @@ static int s6e63m0_ldi_enable(struct s6e63m0 *lcd)
{
int ret = 0, i;
const unsigned short *enable_seq[] = {
- SEQ_STAND_BY_OFF,
- SEQ_DISPLAY_ON,
+ seq_stand_by_off,
+ seq_display_on,
};
for (i = 0; i < ARRAY_SIZE(enable_seq); i++) {
@@ -494,43 +485,39 @@ static int s6e63m0_ldi_disable(struct s6e63m0 *lcd)
{
int ret;
- ret = s6e63m0_panel_send_sequence(lcd, SEQ_STAND_BY_ON);
+ ret = s6e63m0_panel_send_sequence(lcd, seq_stand_by_on);
return ret;
}
+static int s6e63m0_power_is_on(int power)
+{
+ return power <= FB_BLANK_NORMAL;
+}
+
static int s6e63m0_power_on(struct s6e63m0 *lcd)
{
int ret = 0;
- struct lcd_platform_data *pd = NULL;
- struct backlight_device *bd = NULL;
+ struct lcd_platform_data *pd;
+ struct backlight_device *bd;
pd = lcd->lcd_pd;
- if (!pd) {
- dev_err(lcd->dev, "platform data is NULL.\n");
- return -EFAULT;
- }
-
bd = lcd->bd;
- if (!bd) {
- dev_err(lcd->dev, "backlight device is NULL.\n");
- return -EFAULT;
- }
if (!pd->power_on) {
dev_err(lcd->dev, "power_on is NULL.\n");
- return -EFAULT;
+ return -EINVAL;
} else {
pd->power_on(lcd->ld, 1);
- mdelay(pd->power_on_delay);
+ msleep(pd->power_on_delay);
}
if (!pd->reset) {
dev_err(lcd->dev, "reset is NULL.\n");
- return -EFAULT;
+ return -EINVAL;
} else {
pd->reset(lcd->ld);
- mdelay(pd->reset_delay);
+ msleep(pd->reset_delay);
}
ret = s6e63m0_ldi_init(lcd);
@@ -557,14 +544,10 @@ static int s6e63m0_power_on(struct s6e63m0 *lcd)
static int s6e63m0_power_off(struct s6e63m0 *lcd)
{
- int ret = 0;
- struct lcd_platform_data *pd = NULL;
+ int ret;
+ struct lcd_platform_data *pd;
pd = lcd->lcd_pd;
- if (!pd) {
- dev_err(lcd->dev, "platform data is NULL.\n");
- return -EFAULT;
- }
ret = s6e63m0_ldi_disable(lcd);
if (ret) {
@@ -572,13 +555,9 @@ static int s6e63m0_power_off(struct s6e63m0 *lcd)
return -EIO;
}
- mdelay(pd->power_off_delay);
+ msleep(pd->power_off_delay);
- if (!pd->power_on) {
- dev_err(lcd->dev, "power_on is NULL.\n");
- return -EFAULT;
- } else
- pd->power_on(lcd->ld, 0);
+ pd->power_on(lcd->ld, 0);
return 0;
}
@@ -587,9 +566,9 @@ static int s6e63m0_power(struct s6e63m0 *lcd, int power)
{
int ret = 0;
- if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
+ if (s6e63m0_power_is_on(power) && !s6e63m0_power_is_on(lcd->power))
ret = s6e63m0_power_on(lcd);
- else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
+ else if (!s6e63m0_power_is_on(power) && s6e63m0_power_is_on(lcd->power))
ret = s6e63m0_power_off(lcd);
if (!ret)
@@ -689,7 +668,7 @@ static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev,
struct backlight_device *bd = NULL;
int brightness, rc;
- rc = strict_strtoul(buf, 0, (unsigned long *)&lcd->gamma_mode);
+ rc = kstrtouint(buf, 0, &lcd->gamma_mode);
if (rc < 0)
return rc;
@@ -724,7 +703,7 @@ static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev,
struct s6e63m0 *lcd = dev_get_drvdata(dev);
char temp[3];
- sprintf(temp, "%d\n", lcd->gamma_table_count);
+ sprintf(temp, "%u\n", lcd->gamma_table_count);
strcpy(buf, temp);
return strlen(buf);
@@ -732,14 +711,15 @@ static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev,
static DEVICE_ATTR(gamma_table, 0444,
s6e63m0_sysfs_show_gamma_table, NULL);
-static int __devinit s6e63m0_probe(struct spi_device *spi)
+static int s6e63m0_probe(struct spi_device *spi)
{
int ret = 0;
struct s6e63m0 *lcd = NULL;
struct lcd_device *ld = NULL;
struct backlight_device *bd = NULL;
+ struct backlight_properties props;
- lcd = kzalloc(sizeof(struct s6e63m0), GFP_KERNEL);
+ lcd = devm_kzalloc(&spi->dev, sizeof(struct s6e63m0), GFP_KERNEL);
if (!lcd)
return -ENOMEM;
@@ -749,34 +729,35 @@ static int __devinit s6e63m0_probe(struct spi_device *spi)
ret = spi_setup(spi);
if (ret < 0) {
dev_err(&spi->dev, "spi setup failed.\n");
- goto out_free_lcd;
+ return ret;
}
lcd->spi = spi;
lcd->dev = &spi->dev;
- lcd->lcd_pd = (struct lcd_platform_data *)spi->dev.platform_data;
+ lcd->lcd_pd = dev_get_platdata(&spi->dev);
if (!lcd->lcd_pd) {
dev_err(&spi->dev, "platform data is NULL.\n");
- goto out_free_lcd;
+ return -EINVAL;
}
- ld = lcd_device_register("s6e63m0", &spi->dev, lcd, &s6e63m0_lcd_ops);
- if (IS_ERR(ld)) {
- ret = PTR_ERR(ld);
- goto out_free_lcd;
- }
+ ld = devm_lcd_device_register(&spi->dev, "s6e63m0", &spi->dev, lcd,
+ &s6e63m0_lcd_ops);
+ if (IS_ERR(ld))
+ return PTR_ERR(ld);
lcd->ld = ld;
- bd = backlight_device_register("s6e63m0bl-bl", &spi->dev, lcd,
- &s6e63m0_backlight_ops, NULL);
- if (IS_ERR(bd)) {
- ret = PTR_ERR(bd);
- goto out_lcd_unregister;
- }
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.type = BACKLIGHT_RAW;
+ props.max_brightness = MAX_BRIGHTNESS;
+
+ bd = devm_backlight_device_register(&spi->dev, "s6e63m0bl-bl",
+ &spi->dev, lcd, &s6e63m0_backlight_ops,
+ &props);
+ if (IS_ERR(bd))
+ return PTR_ERR(bd);
- bd->props.max_brightness = MAX_BRIGHTNESS;
bd->props.brightness = MAX_BRIGHTNESS;
lcd->bd = bd;
@@ -785,7 +766,7 @@ static int __devinit s6e63m0_probe(struct spi_device *spi)
* know that.
*/
lcd->gamma_table_count =
- sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int));
+ sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int *));
ret = device_create_file(&(spi->dev), &dev_attr_gamma_mode);
if (ret < 0)
@@ -808,85 +789,58 @@ static int __devinit s6e63m0_probe(struct spi_device *spi)
lcd->power = FB_BLANK_POWERDOWN;
s6e63m0_power(lcd, FB_BLANK_UNBLANK);
- } else
+ } else {
lcd->power = FB_BLANK_UNBLANK;
+ }
- dev_set_drvdata(&spi->dev, lcd);
+ spi_set_drvdata(spi, lcd);
dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n");
return 0;
-
-out_lcd_unregister:
- lcd_device_unregister(ld);
-out_free_lcd:
- kfree(lcd);
- return ret;
}
-static int __devexit s6e63m0_remove(struct spi_device *spi)
+static int s6e63m0_remove(struct spi_device *spi)
{
- struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+ struct s6e63m0 *lcd = spi_get_drvdata(spi);
s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
device_remove_file(&spi->dev, &dev_attr_gamma_table);
device_remove_file(&spi->dev, &dev_attr_gamma_mode);
- backlight_device_unregister(lcd->bd);
- lcd_device_unregister(lcd->ld);
- kfree(lcd);
return 0;
}
-#if defined(CONFIG_PM)
-unsigned int before_power;
-
-static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int s6e63m0_suspend(struct device *dev)
{
- int ret = 0;
- struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
-
- dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+ struct s6e63m0 *lcd = dev_get_drvdata(dev);
- before_power = lcd->power;
+ dev_dbg(dev, "lcd->power = %d\n", lcd->power);
/*
* when lcd panel is suspend, lcd panel becomes off
* regardless of status.
*/
- ret = s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
-
- return ret;
+ return s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
}
-static int s6e63m0_resume(struct spi_device *spi)
+static int s6e63m0_resume(struct device *dev)
{
- int ret = 0;
- struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
-
- /*
- * after suspended, if lcd panel status is FB_BLANK_UNBLANK
- * (at that time, before_power is FB_BLANK_UNBLANK) then
- * it changes that status to FB_BLANK_POWERDOWN to get lcd on.
- */
- if (before_power == FB_BLANK_UNBLANK)
- lcd->power = FB_BLANK_POWERDOWN;
-
- dev_dbg(&spi->dev, "before_power = %d\n", before_power);
+ struct s6e63m0 *lcd = dev_get_drvdata(dev);
- ret = s6e63m0_power(lcd, before_power);
+ lcd->power = FB_BLANK_POWERDOWN;
- return ret;
+ return s6e63m0_power(lcd, FB_BLANK_UNBLANK);
}
-#else
-#define s6e63m0_suspend NULL
-#define s6e63m0_resume NULL
#endif
+static SIMPLE_DEV_PM_OPS(s6e63m0_pm_ops, s6e63m0_suspend, s6e63m0_resume);
+
/* Power down all displays on reboot, poweroff or halt. */
static void s6e63m0_shutdown(struct spi_device *spi)
{
- struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+ struct s6e63m0 *lcd = spi_get_drvdata(spi);
s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
}
@@ -894,28 +848,15 @@ static void s6e63m0_shutdown(struct spi_device *spi)
static struct spi_driver s6e63m0_driver = {
.driver = {
.name = "s6e63m0",
- .bus = &spi_bus_type,
.owner = THIS_MODULE,
+ .pm = &s6e63m0_pm_ops,
},
.probe = s6e63m0_probe,
- .remove = __devexit_p(s6e63m0_remove),
+ .remove = s6e63m0_remove,
.shutdown = s6e63m0_shutdown,
- .suspend = s6e63m0_suspend,
- .resume = s6e63m0_resume,
};
-static int __init s6e63m0_init(void)
-{
- return spi_register_driver(&s6e63m0_driver);
-}
-
-static void __exit s6e63m0_exit(void)
-{
- spi_unregister_driver(&s6e63m0_driver);
-}
-
-module_init(s6e63m0_init);
-module_exit(s6e63m0_exit);
+module_spi_driver(s6e63m0_driver);
MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
MODULE_DESCRIPTION("S6E63M0 LCD Driver");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:37:37 +0000