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ARM: pxa: magician: Optimize powerup delays for Samsung LCD

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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>
This commit is contained in:
Petr Cvek 2015-09-28 23:16:14 +02:00 committed by Robert Jarzmik
parent 6001ae70ea
commit fa5407ad9c
1 changed files with 6 additions and 8 deletions
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14
arch/arm/mach-pxa/magician.c
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@ -299,21 +299,19 @@ static void samsung_lcd_power(int on, struct fb_var_screeninfo *si)
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