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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.c153
1 files changed, 57 insertions, 96 deletions
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c
index 3e1c1135f6df..9c2677f0ef7d 100644
--- a/drivers/video/backlight/s6e63m0.c
+++ b/drivers/video/backlight/s6e63m0.c
@@ -9,28 +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"
@@ -43,8 +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;
@@ -57,7 +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,
@@ -76,7 +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,
@@ -90,7 +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,
@@ -119,7 +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,
@@ -318,47 +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
@@ -406,8 +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;
}
@@ -457,12 +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++) {
@@ -478,8 +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++) {
@@ -495,43 +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);
@@ -558,14 +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) {
@@ -573,13 +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;
}
@@ -588,9 +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)
@@ -760,7 +738,7 @@ static int s6e63m0_probe(struct spi_device *spi)
lcd->lcd_pd = spi->dev.platform_data;
if (!lcd->lcd_pd) {
dev_err(&spi->dev, "platform data is NULL.\n");
- return -EFAULT;
+ return -EINVAL;
}
ld = lcd_device_register("s6e63m0", &spi->dev, lcd, &s6e63m0_lcd_ops);
@@ -788,7 +766,7 @@ static int 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)
@@ -811,10 +789,11 @@ static int 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");
@@ -827,7 +806,7 @@ out_lcd_unregister:
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);
@@ -839,44 +818,26 @@ static int s6e63m0_remove(struct spi_device *spi)
}
#if defined(CONFIG_PM)
-static unsigned int before_power;
-
static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
{
- int ret = 0;
- struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
+ struct s6e63m0 *lcd = spi_get_drvdata(spi);
dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
- before_power = 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)
{
- 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;
+ struct s6e63m0 *lcd = spi_get_drvdata(spi);
- dev_dbg(&spi->dev, "before_power = %d\n", before_power);
+ lcd->power = FB_BLANK_POWERDOWN;
- ret = s6e63m0_power(lcd, before_power);
-
- return ret;
+ return s6e63m0_power(lcd, FB_BLANK_UNBLANK);
}
#else
#define s6e63m0_suspend NULL
@@ -886,7 +847,7 @@ static int s6e63m0_resume(struct spi_device *spi)
/* 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);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.