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ENGR00117307 iMX23 reduce LCD driver strength to 8mA

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Changing the LCD pin drive strengths to 8mA reduces
the amount of overshoot in half (15% and 50%) and
does not significantly change the rise and fall time
characteristics of the digital LCD signals

Signed-off-by: Frank Li <Frank.Li@freescale.com>
This commit is contained in:
Frank Li
2009-10-15 13:56:52 +08:00
committed by Matt Sealey
parent 43a06f54b9
commit 1992994612
1 changed files with 29 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
arch/arm/mach-stmp378x/stmp378x_devb.c
View File

@@ -267,35 +267,35 @@ static struct gpmi_platform_data gpmi_partitions = {
};
static struct pin_desc lcd_hx8238a_desc[] = {
{ PINID_LCD_D00, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D01, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D02, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D03, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D04, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D05, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D06, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D07, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D08, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D09, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D10, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D11, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D12, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D13, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D14, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D15, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D16, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D17, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_RESET, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_VSYNC, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_HSYNC, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_ENABLE, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_DOTCK, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_D13, PIN_FUN2, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_D12, PIN_FUN2, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_D11, PIN_FUN2, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_D10, PIN_FUN2, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_D09, PIN_FUN2, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_D08, PIN_FUN2, PIN_12MA, PIN_3_3V, 0 },
{ PINID_LCD_D00, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D01, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D02, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D03, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D04, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D05, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D06, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D07, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D08, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D09, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D10, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D11, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D12, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D13, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D14, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D15, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D16, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_D17, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_RESET, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_VSYNC, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_HSYNC, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_ENABLE, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_LCD_DOTCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_GPMI_D13, PIN_FUN2, PIN_8MA, PIN_3_3V, 0 },
{ PINID_GPMI_D12, PIN_FUN2, PIN_8MA, PIN_3_3V, 0 },
{ PINID_GPMI_D11, PIN_FUN2, PIN_8MA, PIN_3_3V, 0 },
{ PINID_GPMI_D10, PIN_FUN2, PIN_8MA, PIN_3_3V, 0 },
{ PINID_GPMI_D09, PIN_FUN2, PIN_8MA, PIN_3_3V, 0 },
{ PINID_GPMI_D08, PIN_FUN2, PIN_8MA, PIN_3_3V, 0 },
};
struct pin_group lcd_pins = {