linux系统移植之LCD驱动移植

Host：Ubuntu-12.04

Target：Tiny6410

简介：移植LCD驱动程序，其实是copy啦~

移植LCD驱动的基本思路是拿来主义，最大感受是：被友臂的资料给坑了。一线触摸屏控制方式与其他方式有很大不同，内核资料提供的mini6410_backlight.c也不是真正的背光控制，真正的背光控制被mini6410_1wire_host.c劫持了。详细内容可以看这篇帖子http://www.arm9home.net/read.php?tid-14273.html。

总体过程可以分为以下几步：

1、修改mach-mini6410.c及相关头文件，添加fb信息。

2、拷贝与触摸屏相关的dev-ts-mini6410.c、ts.h、regs-adc.h、mini6410_1wire_host.c到相关目录。

3、完整拷贝友臂提供的linux-2.6.38源码下的drivers/video/samsung目录到新源码。

以下是patch记录。

diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig
index 5552e04..01ad86d 100644
--- a/arch/arm/mach-s3c64xx/Kconfig
+++ b/arch/arm/mach-s3c64xx/Kconfig
@@ -107,9 +107,9 @@ config MACH_MINI6410
  select S3C_DEV_USB_HOST
  select S3C_DEV_NAND
  select S3C_DEV_FB
+ select S3C_DEV_RTC
  select S3C64XX_SETUP_FB_24BPP
  select SAMSUNG_DEV_ADC
- select SAMSUNG_DEV_TS            /*一定要去掉，不然报错*/
  help
   Machine support for the FriendlyARM MINI6410
 
diff --git a/arch/arm/mach-s3c64xx/Makefile b/arch/arm/mach-s3c64xx/Makefile
index cfc0b99..c3523ee 100644
--- a/arch/arm/mach-s3c64xx/Makefile
+++ b/arch/arm/mach-s3c64xx/Makefile
@@ -61,3 +61,4 @@ obj-$(CONFIG_MACH_WLF_CRAGG_6410) += mach-crag6410.o mach-crag6410-module.o
 obj-y += dev-uart.o
 obj-y += dev-audio.o
 obj-$(CONFIG_S3C64XX_DEV_SPI) += dev-spi.o
+obj-$(CONFIG_TOUCHSCREEN_MINI6410) += dev-ts-mini6410.o         //添加部分

diff --git a/arch/arm/mach-s3c64xx/mach-mini6410.c b/arch/arm/mach-s3c64xx/mach-mini6410.c   //自行比对
index 1bc85c3..e432d74 100644
--- a/arch/arm/mach-s3c64xx/mach-mini6410.c
+++ b/arch/arm/mach-s3c64xx/mach-mini6410.c
@@ -23,6 +23,7 @@
 #include
 #include
 #include
+#include
 
 #include
 #include
@@ -32,6 +33,7 @@
 #include
 #include
 #include
+#include
 
 #include
 #include
@@ -40,7 +42,7 @@
 #include
 #include
 #include
-#include
+//#include
 #include
 
 #include

以下是直接copy 的文件。

diff --git a/arch/arm/mach-s3c64xx/dev-ts-mini6410.c

diff --git a/arch/arm/mach-s3c64xx/include/mach/gpio-bank-*.h    /*懒人原则，全部拷贝，从a-p*/

diff --git a/arch/arm/mach-s3c64xx/include/mach/regs-lcd.h

diff --git a/arch/arm/mach-s3c64xx/include/mach/regs-fb.h           /*不想看的话就把整个reg-x.h都拷贝过去吧*/

diff --git a/arch/arm/mach-s3c64xx/include/mach/ts.h 

diff --git a/arch/arm/plat-samsung/include/plat/regs-adc.h

diff --git a/drivers/input/touchscreen/mini6410-ts.c 

diff --git a/drivers/input/touchscreen/mini6410_1wire_host.c 

diff --git a/drivers/input/touchscreen/ts-if.c 

diff --git a/drivers/video/samsung/**     /*全部拷贝，并修改video目录下的Kconfig、Makefile文件*/

最后一步，配置内核，启动nfs，看到小企鹅。。