09 --＞ OpenWRT 的 linux内核patch方法，添加5G模块驱动
一、新建补丁文件
1.准备内核源码树
使用如下命令
make target/linux/clean V=s QUILT=1
make targe/linux/prepare V=s QUILT=1
2.进入kernel源码树目录
/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200$ ls
arch certs CREDITS Documentation firmware include ipc Kconfig lib Makefile net README scripts sound usr
block COPYING crypto drivers fs init Kbuild kernel MAINTAINERS mm patches samples security tools virt
3.更新内核补丁文件
linux-4.14.200$ quilt push -a
Applying patch generic-backport/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch
patching file scripts/ld-version.sh
Applying patch generic-backport/011-kbuild-export-SUBARCH.patch
patching file Makefile
Applying patch generic-backport/012-kbuild-add-macro-for-controlling-warnings-to-linux-c.patch
patching file include/linux/compiler-gcc.h
patching file include/linux/compiler_types.h
Applying patch generic-backport/013-disable-Wattribute-alias-warning-for-SYSCALL_DEFINEx.patch
patching file include/linux/compat.h
4. 创建新patch、修改内核驱动
以修改SIM8200 的 5G模块驱动为例
# 查看最新补丁文件号
linux-4.14.200$ quilt top
platform/825-tmu-support-layerscape.patch
# 创建新 '补丁文件'
linux-4.14.200$ quilt new platform/826-ls10xx-usb-serial-option.patch
# 添加补丁文件、修订的文件
linux-4.14.200$ quilt add drivers/usb/serial/option.c
# 编辑文件、增删改的内容都会记录近 补丁文件中,编辑后直接保存退出。
linux-4.14.200$ vim drivers/usb/serial/option.c 补充修改内容
# 查看补丁文件内容
linux-4.14.200$ quilt diff
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -85,6 +85,7 @@ static void option_instat_callback(struc
#define HUAWEI_PRODUCT_K3765 0x1465
#define HUAWEI_PRODUCT_K4605 0x14C6
#define HUAWEI_PRODUCT_E173S6 0x1C07
+#define HUAWEI_PRODUCT_ME906S 0x15c1
#define QUANTA_VENDOR_ID 0x0408
#define QUANTA_PRODUCT_Q101 0xEA02
@@ -348,6 +349,7 @@ static void option_instat_callback(struc
#define ALINK_VENDOR_ID 0x1e0e
#define SIMCOM_PRODUCT_SIM7100E 0x9001 /* Yes, ALINK_VENDOR_ID */
+#define SIMCOM_PRODUCT_SIM8200 0x9011 /* SIMCOM 7600,8200 serial */
#define ALINK_PRODUCT_PH300 0x9100
#define ALINK_PRODUCT_3GU 0x9200
5. 更新 patch文件
此操作等于保存 新生成的 patch 文件。
linux-4.14.200$ quilt refresh
Refreshed patch 1000-ls10xx-usb-serial-option.patch
6.保存patch文件到buildroot
linux-4.14.200$ cd ../../../../
robot@ubuntu:~/OpenWrt/LS1046A-19.07$ make target/linux/update V=s
make[1]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07'
make[2]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
make[3]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
if [ -s "/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/series" ]; then (cd "/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200"; if quilt --quiltrc=- next >/dev/null 2>&1; then quilt --quiltrc=- push -a; else quilt --quiltrc=- top >/dev/null 2>&1; fi ); fi
'/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/platform/825-tmu-support-layerscape.patch' -> '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape/patches-4.14/825-tmu-support-layerscape.patch'
# 新产生补丁包路径及名称
'/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/platform/826-ls10xx-usb-serial-option.patch' -> '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape/patches-4.14/***826-ls10xx-usb-serial-option.patch***'
make[3]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
make[2]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
二、修改补丁文件
当文件需要再次修改文件时，如何修改补丁文件呢？如下所示，文本中有注释描述。
# (1). 进入内核目录、查看需要修改的补丁文件
linux-4.14.200$ quilt top
# (2). 更换不同的补丁文件、pop 补丁文件
linux-4.14.200$ quilt pop //弹出最后一个补丁文件
File series fully applied, ends at patch platform/826-ls10xx-usb-serial-option.patch
# (3). 更换不同的补丁文件、push 补丁文件
linux-4.14.200$ quilt push
# (4). 直接编辑文件内容、增设改内容都会记录到补丁文件
linux-4.14.200$ vim drivers/usb/serial/option.c
# (5). 查看补丁文件更新内容
linux-4.14.200$ quilt diff
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -85,6 +85,7 @@ static void option_instat_callback(struc
#define HUAWEI_PRODUCT_K3765 0x1465
#define HUAWEI_PRODUCT_K4605 0x14C6
#define HUAWEI_PRODUCT_E173S6 0x1C07
+#define HUAWEI_PRODUCT_ME906S 0x15C1
#define QUANTA_VENDOR_ID 0x0408
#define QUANTA_PRODUCT_Q101 0xEA02
@@ -348,6 +349,7 @@ static void option_instat_callback(struc
#define ALINK_VENDOR_ID 0x1e0e
#define SIMCOM_PRODUCT_SIM7100E 0x9001 /* Yes, ALINK_VENDOR_ID */
+#define SIMCOM_PRODUCT_SIM8200 0x9011 /* simcom 7600 & 8200 product id */
#define ALINK_PRODUCT_PH300 0x9100
#define ALINK_PRODUCT_3GU 0x9200
@@ -628,6 +630,8 @@ static const struct usb_device_id option
.driver_info = RSVD(1) },
{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K4605, 0xff, 0xff, 0xff),
.driver_info = RSVD(1) | RSVD(2) },
+ { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_ME906S, 0xff, 0xff, 0xff),
+ .driver_info = RSVD(1) | RSVD(2) },
{ USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0xff, 0xff) },
{ USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x01, 0x01) },
{ USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x01, 0x02) },
@@ -1824,7 +1828,7 @@ static const struct usb_device_id option
{ USB_DEVICE(ALINK_VENDOR_ID, SIMCOM_PRODUCT_SIM7100E),
.driver_info = RSVD(5) | RSVD(6) },
{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) }, /* Simcom SIM7500/SIM7600 MBIM mode */
- { USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff), /* Simcom SIM7500/SIM7600 RNDIS mode */
+ { USB_DEVICE_INTERFACE_CLASS(0x1e0e, SIMCOM_PRODUCT_SIM8200, 0xff), /* Simcom SIM7500/SIM7600 RNDIS mode */
.driver_info = RSVD(7) },
{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) }, /* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) }, /* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
# (6) 更新、保持补丁文件
linux-4.14.200$ quilt refresh
Warning: trailing whitespace in line 634 of drivers/usb/serial/option.c
Refreshed patch platform/826-ls10xx-usb-serial-option.patch
# (7) 更新补丁文件内核补丁包中。 目录:target/linux/layerscape
/OpenWrt/LS1046A-19.07$ make target/linux/refresh V=s
make[1]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07'
make[2]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
make[3]: Entering directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
Applying patch generic-backport/010-Kbuild-don-t-hardcode-path-to-awk-in-scripts-ld-vers.patch
patching file scripts/ld-version.sh
'/home/robot/OpenWrt/LS1046A-19.07/build_dir/target-aarch64_generic_glibc/linux-layerscape_armv8_64b/linux-4.14.200/patches/platform/826-ls10xx-usb-serial-option.patch' -> '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape/patches-4.14/826-ls10xx-usb-serial-option.patch'
make[3]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux/layerscape'
make[2]: Leaving directory '/home/robot/OpenWrt/LS1046A-19.07/target/linux'
time: target/linux/refresh#51.70#18.13#65.19
三、 编译内核、验证修改内容
robot@ubuntu:~/OpenWrt/LS1046A-19.07$ make target/linux/compile
time: target/linux/prereq#0.08#0.01#0.10
make[1] target/linux/compile
make[2] -C target/linux compile
robot@ubuntu:~/OpenWrt/LS1046A-19.07$ make target/linux/install
make[1] target/linux/install
make[2] -C target/linux install
8.验证5G驱动程序
在这里插入代码片