ARM: pxa: magician: Optimize powerup delays for Samsung LCD
Delays for the Samsung LCD are greater than needed. These values were
extracted from a datasheet.
Signed-off-by: Petr Cvek <petr.cvek@tul.cz>
Acked-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index f52351a..4846f5a 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -299,21 +299,19 @@
gpio_set_value(GPIO75_MAGICIAN_SAMSUNG_POWER, 1);
else
gpio_set_value(EGPIO_MAGICIAN_LCD_POWER, 1);
- mdelay(10);
+ mdelay(6);
gpio_set_value(GPIO106_MAGICIAN_LCD_DCDC_NRESET, 1);
- mdelay(10);
+ mdelay(6); /* Avdd -> Voff >5ms */
gpio_set_value(GPIO104_MAGICIAN_LCD_VOFF_EN, 1);
- mdelay(30);
+ mdelay(16); /* Voff -> Von >(5+10)ms */
gpio_set_value(GPIO105_MAGICIAN_LCD_VON_EN, 1);
- mdelay(10);
} else {
- mdelay(10);
gpio_set_value(GPIO105_MAGICIAN_LCD_VON_EN, 0);
- mdelay(30);
+ mdelay(16);
gpio_set_value(GPIO104_MAGICIAN_LCD_VOFF_EN, 0);
- mdelay(10);
+ mdelay(6);
gpio_set_value(GPIO106_MAGICIAN_LCD_DCDC_NRESET, 0);
- mdelay(10);
+ mdelay(6);
if (system_rev < 3)
gpio_set_value(GPIO75_MAGICIAN_SAMSUNG_POWER, 0);
else