Signed-off-by: Vasily Khoruzhick <anarsoul@xxxxxxxxx>
---
drivers/video/backlight/lms283gf05.c | 42 ++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c
index ea43f22..ed15752 100644
--- a/drivers/video/backlight/lms283gf05.c
+++ b/drivers/video/backlight/lms283gf05.c
@@ -22,6 +22,7 @@
struct lms283gf05_state {
struct spi_device *spi;
struct lcd_device *ld;
+ unsigned int power;
};
struct lms283gf05_seq {
@@ -130,6 +131,8 @@ static int lms283gf05_power_set(struct lcd_device *ld, int power)
struct spi_device *spi = st->spi;
struct lms283gf05_pdata *pdata = spi->dev.platform_data;
+ st->power = power;
+
if (power <= FB_BLANK_NORMAL) {
if (pdata)
lms283gf05_reset(pdata->reset_gpio,
@@ -193,6 +196,43 @@ static int __devinit lms283gf05_probe(struct spi_device *spi)
return 0;
}
+#if defined(CONFIG_PM)
+static unsigned int before_power;
+
+static int lms283gf05_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+ int ret = 0;
+ struct lms283gf05_state *state = dev_get_drvdata(&spi->dev);
+
+ dev_dbg(&spi->dev, "lcd->power = %d\n", state->power);
+
+ before_power = state->power;
+
+ /*
+ * when lcd panel is suspend, lcd panel becomes off
+ * regardless of status.
+ */
+ ret = lms283gf05_power_set(state->ld, FB_BLANK_POWERDOWN);
+
+ return ret;
+}
+
+static int lms283gf05_resume(struct spi_device *spi)
+{
+ int ret = 0;
+ struct lms283gf05_state *state = dev_get_drvdata(&spi->dev);
+
+ dev_dbg(&spi->dev, "before_power = %d\n", before_power);
+
+ ret = lms283gf05_power_set(state->ld, before_power);
+
+ return ret;
+}
+#else
+#define lms283gf05_suspend NULL
+#define lms283gf05_resume NULL
+#endif
+
static int __devexit lms283gf05_remove(struct spi_device *spi)
{
struct lms283gf05_state *st = dev_get_drvdata(&spi->dev);
@@ -209,6 +249,8 @@ static struct spi_driver lms283gf05_driver = {
},
.probe = lms283gf05_probe,
.remove = __devexit_p(lms283gf05_remove),
+ .suspend = lms283gf05_suspend,
+ .resume = lms283gf05_resume,
};
module_spi_driver(lms283gf05_driver);
--
1.7.12.4
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