The patch titled
atmel_lcdfb: suspend/resume support
has been added to the -mm tree. Its filename is
atmel_lcdfb-suspend-resume-support.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: atmel_lcdfb: suspend/resume support
From: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Teach atmel_lcdfb driver how to suspend/resume.
Note that the backlight control should probably do more of the same stuff:
turning off display power (more than just the backlight) and stopping the
clocks (and dma to drive the no-longer-seen display). No point in wasting
power to generate images that can't be observed, after all...
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Cc: Hans-Christian Egtvedt <hcegtvedt@xxxxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Andrew Victor <avictor.za@xxxxxxxxx>
Cc: "Antonino A. Daplas" <adaplas@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/video/atmel_lcdfb.c | 36 ++++++++++++++++++++++++++++++++--
include/video/atmel_lcdc.h | 1
2 files changed, 35 insertions(+), 2 deletions(-)
diff -puN drivers/video/atmel_lcdfb.c~atmel_lcdfb-suspend-resume-support drivers/video/atmel_lcdfb.c
--- a/drivers/video/atmel_lcdfb.c~atmel_lcdfb-suspend-resume-support
+++ a/drivers/video/atmel_lcdfb.c
@@ -909,10 +909,42 @@ static int __exit atmel_lcdfb_remove(str
return 0;
}
+#ifdef CONFIG_PM
+
+static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ struct fb_info *info = platform_get_drvdata(pdev);
+ struct atmel_lcdfb_info *sinfo = info->par;
+
+ sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
+ lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0);
+ if (sinfo->atmel_lcdfb_power_control)
+ sinfo->atmel_lcdfb_power_control(0);
+ atmel_lcdfb_stop_clock(sinfo);
+ return 0;
+}
+
+static int atmel_lcdfb_resume(struct platform_device *pdev)
+{
+ struct fb_info *info = platform_get_drvdata(pdev);
+ struct atmel_lcdfb_info *sinfo = info->par;
+
+ atmel_lcdfb_start_clock(sinfo);
+ if (sinfo->atmel_lcdfb_power_control)
+ sinfo->atmel_lcdfb_power_control(1);
+ lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon);
+ return 0;
+}
+
+#else
+#define atmel_lcdfb_suspend NULL
+#define atmel_lcdfb_resume NULL
+#endif
+
static struct platform_driver atmel_lcdfb_driver = {
.remove = __exit_p(atmel_lcdfb_remove),
-
-// FIXME need suspend, resume
+ .suspend = atmel_lcdfb_suspend,
+ .resume = atmel_lcdfb_resume,
.driver = {
.name = "atmel_lcdfb",
diff -puN include/video/atmel_lcdc.h~atmel_lcdfb-suspend-resume-support include/video/atmel_lcdc.h
--- a/include/video/atmel_lcdc.h~atmel_lcdfb-suspend-resume-support
+++ a/include/video/atmel_lcdc.h
@@ -39,6 +39,7 @@ struct atmel_lcdfb_info {
u8 bl_power;
#endif
bool lcdcon_is_backlight;
+ u8 saved_lcdcon;
u8 default_bpp;
unsigned int default_lcdcon2;
_
Patches currently in -mm which might be from dbrownell@xxxxxxxxxxxxxxxxxxxxx are
origin.patch
git-acpi.patch
git-arm-master.patch
git-avr32.patch
git-leds.patch
git-net.patch
spi-use-menuconfig-for-config_spi.patch
spi-pxa2xx_spi-sparse-fixes.patch
documentation-move-spidev_fdx-example-to-its-own-source-file.patch
spi-replace-remaining-__function__-occurrences.patch
rtc-avoid-legacy-drivers-with-generic-framework.patch
rtc-avoid-legacy-drivers-with-generic-framework-update.patch
kerneldoc-for-linux-clkh.patch
gpiolib-better-rmmod-infrastructure.patch
gpiolib-i2c-spi-drivers-handle-rmmod-better.patch
gpio-define-gpio_is_valid.patch
atmel_lcdfb-suspend-resume-support.patch
atmel_lcdfb-wiring-bgr-to-rgb-color-mode.patch
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