From 27ec6bd89b4e4682833deaae69866e8ef254db60 Mon Sep 17 00:00:00 2001
From: Frank Li <Frank.Li@freescale.com>
Date: Thu, 15 Oct 2009 13:56:52 +0800
Subject: ENGR00117307 iMX23 reduce LCD driver strength to 8mA
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>
---
arch/arm/mach-stmp3xxx/stmp378x.c | 58 +++++++++++++++++++--------------------
1 file changed, 29 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-stmp3xxx/stmp378x.c b/arch/arm/mach-stmp3xxx/stmp378x.c
index 1cb07cdb48fb..a5d282c1519b 100644
--- a/arch/arm/mach-stmp3xxx/stmp378x.c
+++ b/arch/arm/mach-stmp3xxx/stmp378x.c
@@ -275,35 +275,35 @@ struct pin_group gpmi_pins = {
};
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 stmp378x_lcd_pins = {
--
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