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Use the fine-grained, generic PWM platform driver for backlight.

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Update PWM driver to support the notifier from the MTL017 driver
such that when the LVDS is off, the backlight turns off too.
This commit is contained in:
Matt Sealey
2010-09-10 18:29:25 -05:00
parent 86bb4ecfc1
commit 56ef1445b1
3 changed files with 24 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/configs/mx51_efikasb_defconfig
View File

@@ -1,9 +1,10 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.31.14
# Fri Sep 10 11:05:25 2010
# Fri Sep 10 18:26:57 2010
#
CONFIG_ARM=y
CONFIG_HAVE_PWM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_GENERIC_GPIO=y
CONFIG_GENERIC_TIME=y
@@ -220,7 +221,7 @@ CONFIG_MACH_MX51_EFIKASB=y
CONFIG_MXC_TZIC=y
CONFIG_ISP1504_MXC=y
# CONFIG_MXC_IRQ_PRIOR is not set
# CONFIG_MXC_PWM is not set
CONFIG_MXC_PWM=y
CONFIG_MXC_DVFS_PER=y
#
@@ -1239,8 +1240,8 @@ CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_GENERIC is not set
CONFIG_BACKLIGHT_MXC=y
CONFIG_BACKLIGHT_MXC_EFIKASB=y
CONFIG_BACKLIGHT_PWM=y
# CONFIG_BACKLIGHT_MXC is not set
#
# Display device support
@@ -1564,6 +1565,7 @@ CONFIG_LEDS_GPIO_PLATFORM=y
# CONFIG_LEDS_LP3944 is not set
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_DAC124S085 is not set
# CONFIG_LEDS_PWM is not set
# CONFIG_LEDS_BD2802 is not set
#

7
arch/arm/mach-mx5/mx51_efikasb.c
View File

@@ -354,10 +354,6 @@ static struct mxc_lcd_platform_data lvds_data = {
.lvds_enable = mxc_lvds_enable,
};
static struct platform_device mxcbl_device = {
.name = "mxc_efikasb_bl",
};
static struct platform_device mxc_led_device = {
.name = "efikasb_leds",
.id = 1,
@@ -748,7 +744,6 @@ static void __init mxc_board_init(void)
mxc_register_device(&mxc_dvfs_per_device, &dvfs_per_data);
mxc_register_device(&mxc_iim_device, NULL);
mxc_register_device(&mxc_pwm1_device, NULL);
mxc_register_device(&mxc_pwm_backlight_device, &mxc_pwm_backlight_data);
mxc_register_device(&mxc_ssi1_device, NULL);
mxc_register_device(&mxc_ssi2_device, NULL);
@@ -756,7 +751,7 @@ static void __init mxc_board_init(void)
mxc_register_device(&mxc_alsa_spdif_device, &mxc_spdif_data);
mxc_init_fb();
mxc_register_device(&mxcbl_device, NULL);
mxc_register_device(&mxc_pwm_backlight_device, &mxc_pwm_backlight_data);
mxc_register_device(&mxc_led_device, NULL);
mx51_efikasb_init_mc13892();

17
drivers/video/backlight/pwm_bl.c
View File

@@ -20,6 +20,23 @@
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#if defined(CONFIG_FB_MXC_MTL017)
static BLOCKING_NOTIFIER_HEAD(backlight_notifier_list);
int register_backlight_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_register(&backlight_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(register_backlight_notifier);
int unregister_backlight_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(&backlight_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(unregister_backlight_notifier);
#endif
struct pwm_bl_data {
struct pwm_device *pwm;
unsigned int period;