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linux-sunxi-3.4-ITEADDevelopingRecord.md

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linux-sunxi/sunxi-3.4 ITEAD Developing Record

Author: Wu Pengfei<[email protected]>
Date: 9/25/2014 10:56:59 AM

Assumption

Record Start {

First commit version 3.4.79+ for ITEAD:

git log

Last commit:

commit b6eb2b9b770537ff320c52342174d2bed56b574d
Author: Luc Verhaegen <[email protected]>
Date:   Thu Jan 9 22:05:38 2014 +0100

    sunxi:nand: add support for samsung K9GBG08U0M
    
    This data was taken from a newer version of libnand, which is only
    available as a binary blob. The flags gave me a bit of trouble, but
    i verified that all of the ones in the current libnand are still
    being used the same way in the new libnand.
    
    Works as well as could be expected :)
    
    Signed-off-by: Luc Verhaegen <[email protected]>

1. Using config of ITEAD:

Copy files below to tree/ :

ITEAD-OS_A10_201405121918_defconfig
ITEAD-OS_A20_201405130901_defconfig

2. Replace linux logo with ITEAD logo

First, make logo.ppm from logo.png

File png2ppm224.sh, a script , can make logo.ppm from logo.png. The content of cat png2ppm224.sh is:

#!/bin/bash

ITEAD_LOGO_NAME=${1/.png/}

pngtopnm ${ITEAD_LOGO_NAME}.png > ${ITEAD_LOGO_NAME}.pnm 
pnmquant 224 ${ITEAD_LOGO_NAME}.pnm > ${ITEAD_LOGO_NAME}224.pnm 
pnmtoplainpnm ${ITEAD_LOGO_NAME}224.pnm > ${ITEAD_LOGO_NAME}224.ppm

rm -f ${ITEAD_LOGO_NAME}.pnm  ${ITEAD_LOGO_NAME}224.pnm 

echo ${ITEAD_LOGO_NAME}224.ppm generated successfully !!!

Note: You should run the script with sudo ./png2ppm224.sh logo.png .

Second, replace dervers/video/logo/logo_linux_clut224.ppm with our logo.ppm

cp ../../bin/logo/logo_linux_clut224.ppm drivers/video/logo/

3. Commit and Create Tag

git add *
git commit -a -m "First commit of ITEAD: Add config files and replace logo by Wu Pengfei"
git tag -a vITEAD-3.4.79+ -m "commit[e75ce8566de810fabfe109c7c877c7cde57364b6]"

4. 打I2S驱动补丁并更新内核到3.4.103

下载补丁文件：

网址：http://www.cubieforums.com/index.php?topic=1413.msg13540#msg13540
文件：0001-I2S-module-rework.patch

打补丁

在 vITEAD-3.4.79+ 打补丁并提交得到 vITEAD-OS-3.4.79+_with_I2S_patch

patch -p1 < ../0001-I2S-module-rework.patch

更新内核版本

从linux-sunxi更新sunxi-3.4到最新版3.4.103。

修改配置文件，将i2s驱动编译进内核

基于 ITEAD-OS_A20_201405130901_defconfig 将配置选项 SND_SUNXI_SOC_I2S_INTERFACE 配置为y

Symbol: SND_SUNXI_SOC_I2S_INTERFACE [=m]                                                                                     |  
  | Type  : tristate                                                                                                             |  
  | Prompt: SoC i2s interface for the AllWinner sun4i, sun5i and sun7i chips                                                     |  
  |   Defined at sound/soc/sunxi/i2s/Kconfig:1                                                                                   |  
  |   Depends on: SOUND [=y] && !M68K && !UML && SND [=y] && SND_SOC [=y] && SOUND_SUNXI [=y] && (ARCH_SUN4I [=n] || ARCH_SUN5I  |  
  |   Location:                                                                                                                  |  
  |     -> Device Drivers                                                                                                        |  
  |       -> Sound card support (SOUND [=y])                                                                                     |  
  |         -> Advanced Linux Sound Architecture (SND [=y])                                                                      |  
  |           -> ALSA for SoC audio support (SND_SOC [=y])                                                                       |  
  |             -> SOUND driver for sunxi (SOUND_SUNXI [=y])

保存.config为 ITEAD-OS_A20_20141029_defconfig 且提交为 vITEAD-OS-3.4.103 。

5. 将nand驱动编译进内核[日期：11/4/2014 10:29:33 AM]

基于 ITEAD-OS_A20_20141029_defconfig 将nand驱动编译进内核，将配置文件保存为 ITEAD-OS_A20_20141104_defconfig。

提交记录为：

commit 4e7a8ea2a94f879fd79c7e9fb21338f7b1487464
Author: shennongmin <[email protected]>
Date:   Tue Nov 4 10:25:07 2014 +0800

    Add ITEAD-OS_A20_20141104_defconfig: buildin nand driver.

#Record End }