Difference between revisions of "SPI/zh"

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(updated by API)
(updated by API)
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−
[[SPI |English]]
+
[[SPI/zh|查看中文]]
  
 
==S5P4418==
 
==S5P4418==
Line 7: Line 7:
 
另外，arch/arm/plat-s5p4418/asb/device.c 有 spi2 的支持，修改时可参考; <br />
 
另外，arch/arm/plat-s5p4418/asb/device.c 有 spi2 的支持，修改时可参考; <br />
  
 +
==H5==
 +
===SPI Flash===
 +
FriendlyElec H5的Linux-4.14内核集成了"mxicy,mx25l12805d"的SPI Flash驱动，使用的是SPI0，但是默认并没有使能，相关的dts配置如下:
 +
<syntaxhighlight lang="text">
 +
$ vi linux/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi.dtsi
 +
&spi0 {
 +
...
 +
spiflash: spiflash@0 {
 +
#address-cells = <1>;
 +
#size-cells = <1>;
 +
compatible = "mxicy,mx25l12805d";
 +
reg = <0>;
 +
status = "disabled";
  
−
==H5/H3/H2+==
+
spi-max-frequency = <50000000>;
 +
mode = <0>;
 +
 
 +
partition@0 {
 +
reg = <0x0 0x1000000>;
 +
label = "spi-flash";
 +
};
 +
};
 +
    ...
 +
</syntaxhighlight>
 +
 
 +
可以在npi-config里将其使能，如下:
 +
<syntaxhighlight lang="text">
 +
$ npi-config
 +
6 Advanced Options| Configure advanced setting
 +
A5 SPI| Enable/Disable SPI
 +
spi0 Enable/Disable spi0[enabled]
 +
spidev0.0| SPI0 char device
 +
spi-2.8'tft| Matrix-2'8_SPI_Key_TFT
 +
spi-flash| SPI0 flash(X)
 +
</syntaxhighlight>
 +
设置完毕后需要重启系统。<br>
 +
{{Linux-SPIFlash/zh}}
 +
 
 +
 
 +
==H3/H2+==
 
===SPI Flash===
 
===SPI Flash===
−
<syntaxhighlight lang="html4strict">
+
FriendlyElec H3/H2+的Linux-4.14内核集成了"mxicy,mx25l12805d"的SPI Flash驱动，使用的是SPI0，但是默认并没有使能，相关的dts配置如下:
 +
<syntaxhighlight lang="text">
 +
$ vi linux/arch/arm/boot/dts/sun8i-h3-nanopi.dtsi
 +
&spi0 {
 +
...
 +
spiflash: spiflash@0 {
 +
#address-cells = <1>;
 +
#size-cells = <1>;
 +
compatible = "mxicy,mx25l12805d";
 +
reg = <0>;
 +
status = "disabled";
 +
 
 +
spi-max-frequency = <50000000>;
 +
mode = <0>;
 +
 
 +
partition@0 {
 +
reg = <0x0 0x1000000>;
 +
label = "spi-flash";
 +
};
 +
};
 +
    ...
 +
</syntaxhighlight>
 +
 
 +
可以在npi-config里将其使能，如下:
 +
<syntaxhighlight lang="text">
 
$ npi-config
 
$ npi-config
−
6 Advanced Options|     Configure advanced setting
+
6 Advanced Options| Configure advanced setting
−
A5 SPI|             Enable/Disable SPI
+
A5 SPI| Enable/Disable SPI
 
spi0 Enable/Disable spi0[enabled]
 
spi0 Enable/Disable spi0[enabled]
−
spidev0.0|   SPI0 char device
+
spidev0.0| SPI0 char device
 
spi-2.8'tft| Matrix-2'8_SPI_Key_TFT
 
spi-2.8'tft| Matrix-2'8_SPI_Key_TFT
−
spi-flash|   SPI0 flash(X)
+
spi-flash| SPI0 flash(X)
 
</syntaxhighlight>
 
</syntaxhighlight>
−
FriendlyElec H5/H3/H2+的Linux-4.14内核集成了"mxicy,mx25l12805d"的SPI Flash驱动，但是默认并没有使能，选择'spi-flash'后即可将其使能, 设置完毕后需要重启系统。<br>
+
设置完毕后需要重启系统。<br>
 
{{Linux-SPIFlash/zh}}
 
{{Linux-SPIFlash/zh}}

Revision as of 04:24, 15 January 2019

查看中文

1 S5P4418

1.1 Q: S5P4418的/dev目录下只有一个spidev0.0这个设备节点, 怎么添加spidev1.0

对于3.4内核来说，4418 需要修改 arch/arm/plat-s5p4418/nanopi2/device.c;
想要增加一路的话，可先搜索 CONFIG_SPI_SPIDEV , 然后参考已有代码增加另一路的支持;
另外，arch/arm/plat-s5p4418/asb/device.c 有 spi2 的支持，修改时可参考;

2 H5

2.1 SPI Flash

FriendlyElec H5的Linux-4.14内核集成了"mxicy,mx25l12805d"的SPI Flash驱动，使用的是SPI0，但是默认并没有使能，相关的dts配置如下: 

$ vi linux/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi.dtsi
&spi0 {
	...
	spiflash: spiflash@0 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "mxicy,mx25l12805d";
		reg = <0>;
		status = "disabled";
 
		spi-max-frequency = <50000000>;
		mode = <0>;
 
		partition@0 {
			reg = <0x0 0x1000000>;
			label = "spi-flash";
		};
	};
    ...

可以在npi-config里将其使能，如下: 

$ npi-config
	6 Advanced Options| Configure advanced setting
		A5 SPI| Enable/Disable SPI
			spi0 Enable/Disable spi0[enabled]
				spidev0.0| SPI0 char device
				spi-2.8'tft| Matrix-2'8_SPI_Key_TFT
				spi-flash| SPI0 flash(X)

设置完毕后需要重启系统。
启动Linux系统时，看到类似下面的启动信息则说明SPI Flash被成功检测到了:

m25p80 spi0.0: mx25l12805d (16384 Kbytes)
1 ofpart partitions found on MTD device spi0.0
Creating 1 MTD partitions on "spi0.0":
0x000000000000-0x000001000000 : "spi-flash"

SPI Flash在Linux系统下的使用方法如下:

$ cat /sys/class/mtd/mtd0/size          # 以byte为单位
$ cat /sys/class/block/mtdblock0/size   # 以sector(512 byte)为单位
$ apt-get install mtd-utils 
$ flash_eraseall -j /dev/mtd0           # 格式成jffs2的格式
$ mount -t jffs2 /dev/mtdblock0 /mnt    
$ mkfs.ext4 /dev/mtdblock0              # 也格式化为ext4
$ mount -t ext4 /dev/mtdblock0 /mnt


3 H3/H2+

3.1 SPI Flash

FriendlyElec H3/H2+的Linux-4.14内核集成了"mxicy,mx25l12805d"的SPI Flash驱动，使用的是SPI0，但是默认并没有使能，相关的dts配置如下: 

$ vi linux/arch/arm/boot/dts/sun8i-h3-nanopi.dtsi
&spi0 {
	...
	spiflash: spiflash@0 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "mxicy,mx25l12805d";
		reg = <0>;
		status = "disabled";
 
		spi-max-frequency = <50000000>;
		mode = <0>;
 
		partition@0 {
			reg = <0x0 0x1000000>;
			label = "spi-flash";
		};
	};
    ...

可以在npi-config里将其使能，如下: 

$ npi-config
	6 Advanced Options| Configure advanced setting
		A5 SPI| Enable/Disable SPI
			spi0 Enable/Disable spi0[enabled]
				spidev0.0| SPI0 char device
				spi-2.8'tft| Matrix-2'8_SPI_Key_TFT
				spi-flash| SPI0 flash(X)

设置完毕后需要重启系统。
启动Linux系统时，看到类似下面的启动信息则说明SPI Flash被成功检测到了:

m25p80 spi0.0: mx25l12805d (16384 Kbytes)
1 ofpart partitions found on MTD device spi0.0
Creating 1 MTD partitions on "spi0.0":
0x000000000000-0x000001000000 : "spi-flash"

SPI Flash在Linux系统下的使用方法如下:

$ cat /sys/class/mtd/mtd0/size          # 以byte为单位
$ cat /sys/class/block/mtdblock0/size   # 以sector(512 byte)为单位
$ apt-get install mtd-utils 
$ flash_eraseall -j /dev/mtd0           # 格式成jffs2的格式
$ mount -t jffs2 /dev/mtdblock0 /mnt    
$ mkfs.ext4 /dev/mtdblock0              # 也格式化为ext4
$ mount -t ext4 /dev/mtdblock0 /mnt
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