cb a20 android 下spi设备的结点名字是什么？

醉月

由于想玩玩CB2的SPI，就使用这里的源码：
http://forum.cubietech.com/forum.php?mod=viewthread&tid=1306

我在kernel的driver里面通过  make ARCH=arm menuconfig 打开了  spi   以及 sun7i_spi的驱动，然后编译进内核

修改sys_config.fex如下：
vim ./tools/pack/chips/sun7i/configs/android/sugar-cubieboard2/sys_config.fex
------------------

1. 246 ;-------------------------------------------------------------------------------
   
2. 247 ;spi configuration
   
3. 248 ;-------------------------------------------------------------------------------
   
4. 249 [spi0_para]
   
5. 250 spi_used            = 1
   
6. 251 spi_cs_bitmap       = 1
   
7. 252 spi_cs0             = port:PI10<2><default><default><default>
   
8. 253 spi_sclk            = port:PI11<2><default><default><default>
   
9. 254 spi_mosi            = port:PI12<2><default><default><default>
   
10. 255 spi_miso            = port:PI13<2><default><default><default>
    
11. 
    
12. 287 ;---------------------------
    
13. 288 [spi_devices]
    
14. 289 spi_dev_num = 1
    
15. 290
    
16. 291 [spi_board0]
    
17. 292 modalias = "spidev"
    
18. 293 max_speed_hz = 12000000
    
19. 294 bus_num = 1
    
20. 295 chip_select = 1
    
21. 296 mode = 0
    
22. 297 full_duplex = 1
    
23. 298 ;manual_cs = 0
    
24. 
    

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然后extrasp  并  pack  生成可烧写的 img,烧录进cubieboard2板子里，
在ubuntu 下 adb shell上去，进入 /dev 目录下，ls 并没有发现我心目中的 spi的名字，比如 "spixxxx"之类的，请问我这个spi成功了吗？成功了，那么它应该像串口那样生产"ttySx"那样的名字啊，请问它是什么名字呢？
如果没成功，那是不是我的配置有什么错误？
求指点下，谢谢！


ps:已经有  spi-sun7i.c的文件了，我想驱动是没问题了，那到底是什么问题导致了这个情况呢？迷茫中...


谢谢！

wolf

linux .config文件添加:
CONFIG_SPI_SUN7I=y
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
CONFIG_EXPERIMENTAL=y
CONFIG_SPI_SPIDEV=y

编译,就会看到 /dev/spidev0.0

醉月

wolf 发表于 2014-1-17 11:37
linux .config文件添加:
CONFIG_SPI_SUN7I=y
CONFIG_SPI=y

我能直接在driver/spi/Kconfig 里面进行修改吗？  我看了下这个Kconfig文件是这么写的

1. config SPI_SUN7I
   
2.         tristate "SUN7I SPI Controller"
   
3.         depends on ARCH_SUN7I
   
4.         help
   
5.                 Allwinner Soc SPI controller, present on SUN7I chips.
   
6. 
   
7. config SUN7I_SPI_NDMA
   
8.     bool "SUN7I SPI Normal DMA mode select"
   
9.     depends on SPI_SUN7I
   
10.     help
    
11.         This selects SPI DMA mode with DMA transfer
    
12.         Y select NDMA mode and N select DDMA mode
    
13. 
    
14. config SUN7I_SPI_NORFLASH
    
15.     bool "SUN7I SPI Norflash"
    
16.     depends on SPI_SUN7I
    
17.     help
    
18.         This selects norflash support.
    

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wolf

醉月 发表于 2014-1-17 13:11
我能直接在driver/spi/Kconfig 里面进行修改吗？  我看了下这个Kconfig文件是这么写的 ...

这个我不知道,没研究过, 我就是在linux3.4 下面的 .config改的.

如果在Kconfig里面做的话, 应该配成固定的选项吧.

醉月

wolf 发表于 2014-1-17 16:54
这个我不知道,没研究过, 我就是在linux3.4 下面的 .config改的.

如果在Kconfig里面做的话, 应该配成固定 ...

好的，谢谢！

Jimmyxu

请问一下：为何我的编译会有这么多错误？

drivers/spi/spi-sun7i.c: In function ‘sun7i_spi_set_gpio’:
drivers/spi/spi-sun7i.c:1241:13: error: implicit declaration of function ‘gpio_request_ex’ [-Werror=implicit-function-declaration]
drivers/spi/spi-sun7i.c:1295:13: error: implicit declaration of function ‘gpio_release’ [-Werror=implicit-function-declaration]
drivers/spi/spi-sun7i.c: At top level:
drivers/spi/spi-sun7i.c:1748:18: error: ‘SW_INT_IRQNO_SPI00’ undeclared here (not in a function)
drivers/spi/spi-sun7i.c:1800:18: error: ‘SW_INT_IRQNO_SPI01’ undeclared here (not in a function)
drivers/spi/spi-sun7i.c:1800:9: error: initializer element is not constant
drivers/spi/spi-sun7i.c:1800:9: error: (near initialization for ‘sun7i_spi1_resources[3].start’)
drivers/spi/spi-sun7i.c:1801:9: error: initializer element is not constant
drivers/spi/spi-sun7i.c:1801:9: error: (near initialization for ‘sun7i_spi1_resources[3].end’)
drivers/spi/spi-sun7i.c:1846:18: error: ‘SW_INT_IRQNO_SPI02’ undeclared here (not in a function)
drivers/spi/spi-sun7i.c:1846:9: error: initializer element is not constant
drivers/spi/spi-sun7i.c:1846:9: error: (near initialization for ‘sun7i_spi2_resources[3].start’)
drivers/spi/spi-sun7i.c:1847:9: error: initializer element is not constant
drivers/spi/spi-sun7i.c:1847:9: error: (near initialization for ‘sun7i_spi2_resources[3].end’)
drivers/spi/spi-sun7i.c:1898:18: error: ‘SW_INT_IRQNO_SPI3’ undeclared here (not in a function)
drivers/spi/spi-sun7i.c:1898:9: error: initializer element is not constant
drivers/spi/spi-sun7i.c:1898:9: error: (near initialization for ‘sun7i_spi3_resources[3].start’)
drivers/spi/spi-sun7i.c:1899:9: error: initializer element is not constant
drivers/spi/spi-sun7i.c:1899:9: error: (near initialization for ‘sun7i_spi3_resources[3].end’)
drivers/spi/spi-sun7i.c: In function ‘sun7i_spi_register_spidev’:
drivers/spi/spi-sun7i.c:1930:5: error: implicit declaration of function ‘script_parser_fetch’ [-Werror=implicit-function-declaration]
drivers/spi/spi-sun7i.c:1931:15: error: ‘SCRIPT_PARSER_OK’ undeclared (first use in this function)
drivers/spi/spi-sun7i.c:1931:15: note: each undeclared identifier is reported only once for each function it appears in
drivers/spi/spi-sun7i.c:1931:12: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c:1951:16: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c:1956:16: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c:1961:16: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c:1966:16: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c:1971:16: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c:1976:10: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c: In function ‘sun7i_spi_get_cfg_csbitmap’:
drivers/spi/spi-sun7i.c:2021:15: error: ‘SCRIPT_PARSER_OK’ undeclared (first use in this function)
drivers/spi/spi-sun7i.c:2021:12: warning: comparison between pointer and integer [enabled by default]
drivers/spi/spi-sun7i.c: At top level:
drivers/spi/spi-sun7i.c:2068:20: warning: ‘sun7i_spi_norflash’ defined but not used [-Wunused-function]
cc1: some warnings being treated as errors
make[2]: *** [drivers/spi/spi-sun7i.o] Error 1

Jimmyxu

Jimmyxu 发表于 2014-7-9 16:28
请问一下：为何我的编译会有这么多错误？

drivers/spi/spi-sun7i.c: In function ‘sun7i_spi_set_gpio’: ...

原来我的kernel是3.3.0的版本，arch/arm/下没有plat-sun7i这个folder，少了几个.h所以编译会找不到！！