uio_dmem_genirq驱动程序向后兼容 uio_pdrv_genirq司机，但加上它dynamically allocates continuous memory .必须如何定义设备树条目才能加载 dmem 驱动程序？ pdrv 版本的工作配置包括以下设备树条目:
spw0@7aa00000 {
compatible = "generic-uio";
reg = <0x7aa00000 0x10000>;
interrupts = <0x0 0x1D 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
并将 bootargs 更改为 console=ttyPS0,115200 root=/dev/mmcblk0p1 rw rootwait earlyprintk uio_pdrv_genirq.of_id=generic-uio。
我当前的 dmem 版本配置如下所示，但不加载 uio 驱动程序，尽管它被编译到内核中。这是 /lib/modules/4.4.0-xilinx/modules.builtin
kernel/drivers/uio/uio.ko
kernel/drivers/uio/uio_pdrv_genirq.ko
kernel/drivers/uio/uio_dmem_genirq.ko
用于尝试和配置驱动程序的两种不同风格是:
spw0@7aa00000 {
compatible = "generic-uio";
reg = <0x7aa00000 0x10000>;
uio,number-of-dynamic-regions = <1>;
uio,dynamic-regions-sizes = <0x4000>;
interrupts = <0x0 0x1D 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw1@7aa00000 {
compatible = "generic-uio";
num_dynamic_regions = <2>;
dynamic_region_sizes = <0x8000>;
interrupts = <0x0 0x1E 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
并且 bootargs 更新为 console=ttyPS0,115200 root=/dev/mmcblk0p1 rw rootwait earlyprintk uio_dmem_genirq.of_id=generic-uio。
最佳答案
这是一个适合我的设备树文件。它可能在这里或那里有一个奇怪的配置，如果您不得不更改某些内容，我们将不胜感激。
/dts-v1/;
/ {
#address-cells = <0x1>;
#size-cells = <0x1>;
compatible = "xlnx,zynq-7000";
model = "uart0";
chosen {
bootargs = "console=ttyPS0,115200 earlyprintk";
};
aliases {
serial0 = "/amba/serial@e0000000";
ethernet0 = "/amba/ethernet@e000b000";
spi0 = "/amba/spi@e000d000";
};
memory {
device_type = "memory";
reg = <0x0 0x40000000>;
};
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
spw_dma@3E000000 {
reg = <0x3E000000 0x2000000>;
};
};
cpus {
#address-cells = <0x1>;
#size-cells = <0x0>;
cpu@0 {
compatible = "arm,cortex-a9";
device_type = "cpu";
reg = <0x0>;
clocks = <0x1 0x3>;
clock-latency = <0x3e8>;
cpu0-supply = <0x2>;
operating-points = <0xa2c2a 0xf4240 0x51615 0xf4240>;
};
cpu@1 {
compatible = "arm,cortex-a9";
device_type = "cpu";
reg = <0x1>;
clocks = <0x1 0x3>;
};
};
pmu {
compatible = "arm,cortex-a9-pmu";
interrupts = <0x0 0x5 0x4 0x0 0x6 0x4>;
interrupt-parent = <0x3>;
reg = <0xf8891000 0x1000 0xf8893000 0x1000>;
};
fixedregulator@0 {
compatible = "regulator-fixed";
regulator-name = "VCCPINT";
regulator-min-microvolt = <0xf4240>;
regulator-max-microvolt = <0xf4240>;
regulator-boot-on;
regulator-always-on;
linux,phandle = <0x2>;
phandle = <0x2>;
};
amba {
compatible = "simple-bus";
#address-cells = <0x1>;
#size-cells = <0x1>;
interrupt-parent = <0x3>;
ranges;
spw0@7aa00000 {
compatible = "generic-uio";
reg = <0x7aa00000 0x10000>;
uio,number-of-dynamic-regions = <1>;
uio,dynamic-regions-sizes = <0x4000>;
interrupts = <0x0 0x1D 0x0>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw1@7aa00000 {
compatible = "generic-uio";
uio,number-of-dynamic-regions = <2>;
uio,dynamic-regions-sizes = <0x8000>;
interrupts = <0x0 0x1E 0x0>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw2@7aa00000 {
compatible = "generic-uio";
reg = <0x3d000000 0x10000>;
interrupts = <0x0 0x1F 0x0>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw3@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x20 0x0>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw4@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x21 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw5@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x22 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw6@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x23 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw7@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x24 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw8@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x34 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw9@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x35 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw10@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x36 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw11@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x37 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw12@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x38 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw13@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x39 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw14@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x3A 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
spw15@7aa00000 {
compatible = "generic-uio";
interrupts = <0x0 0x3B 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1>;
};
adc@f8007100 {
compatible = "xlnx,zynq-xadc-1.00.a";
reg = <0xf8007100 0x20>;
interrupts = <0x0 0x7 0x4>;
interrupt-parent = <0x3>;
clocks = <0x1 0xc>;
};
can@e0008000 {
compatible = "xlnx,zynq-can-1.0";
status = "disabled";
clocks = <0x1 0x13 0x1 0x24>;
clock-names = "can_clk", "pclk";
reg = <0xe0008000 0x1000>;
interrupts = <0x0 0x1c 0x4>;
interrupt-parent = <0x3>;
tx-fifo-depth = <0x40>;
rx-fifo-depth = <0x40>;
};
can@e0009000 {
compatible = "xlnx,zynq-can-1.0";
status = "disabled";
clocks = <0x1 0x14 0x1 0x25>;
clock-names = "can_clk", "pclk";
reg = <0xe0009000 0x1000>;
interrupts = <0x0 0x33 0x4>;
interrupt-parent = <0x3>;
tx-fifo-depth = <0x40>;
rx-fifo-depth = <0x40>;
};
gpio@e000a000 {
compatible = "xlnx,zynq-gpio-1.0";
#gpio-cells = <0x2>;
clocks = <0x1 0x2a>;
gpio-controller;
interrupt-parent = <0x3>;
interrupts = <0x0 0x14 0x4>;
reg = <0xe000a000 0x1000>;
emio-gpio-width = <0x40>;
gpio-mask-high = <0x0>;
gpio-mask-low = <0x5600>;
};
i2c@e0004000 {
compatible = "cdns,i2c-r1p10";
status = "okay";
clocks = <0x1 0x26>;
interrupt-parent = <0x3>;
interrupts = <0x0 0x19 0x4>;
reg = <0xe0004000 0x1000>;
#address-cells = <0x1>;
#size-cells = <0x0>;
clock-frequency = <0x61a80>;
};
i2c@e0005000 {
compatible = "cdns,i2c-r1p10";
status = "okay";
clocks = <0x1 0x27>;
interrupt-parent = <0x3>;
interrupts = <0x0 0x30 0x4>;
reg = <0xe0005000 0x1000>;
#address-cells = <0x1>;
#size-cells = <0x0>;
clock-frequency = <0x61a80>;
};
interrupt-controller@f8f01000 {
compatible = "arm,cortex-a9-gic";
#interrupt-cells = <0x3>;
interrupt-controller;
reg = <0xf8f01000 0x1000 0xf8f00100 0x100>;
num_cpus = <0x2>;
num_interrupts = <0x60>;
linux,phandle = <0x3>;
phandle = <0x3>;
};
cache-controller@f8f02000 {
compatible = "arm,pl310-cache";
reg = <0xf8f02000 0x1000>;
interrupts = <0x0 0x2 0x4>;
arm,data-latency = <0x3 0x2 0x2>;
arm,tag-latency = <0x2 0x2 0x2>;
cache-unified;
cache-level = <0x2>;
};
memory-controller@f8006000 {
compatible = "xlnx,zynq-ddrc-a05";
reg = <0xf8006000 0x1000>;
};
ocmc@f800c000 {
compatible = "xlnx,zynq-ocmc-1.0";
interrupt-parent = <0x3>;
interrupts = <0x0 0x3 0x4>;
reg = <0xf800c000 0x1000>;
};
serial@e0000000 {
compatible = "xlnx,xuartps", "cdns,uart-r1p8";
status = "okay";
clocks = <0x1 0x17 0x1 0x28>;
clock-names = "uart_clk", "pclk";
reg = <0xe0000000 0x1000>;
interrupts = <0x0 0x1b 0x4>;
current-speed = <0x1c200>;
device_type = "serial";
port-number = <0x0>;
};
serial@e0001000 {
compatible = "xlnx,xuartps", "cdns,uart-r1p8";
status = "disabled";
clocks = <0x1 0x18 0x1 0x29>;
clock-names = "uart_clk", "pclk";
reg = <0xe0001000 0x1000>;
interrupts = <0x0 0x32 0x4>;
};
spi@e0006000 {
compatible = "xlnx,zynq-spi-r1p6";
reg = <0xe0006000 0x1000>;
status = "okay";
interrupt-parent = <0x3>;
interrupts = <0x0 0x1a 0x4>;
clocks = <0x1 0x19 0x1 0x22>;
clock-names = "ref_clk", "pclk";
#address-cells = <0x1>;
#size-cells = <0x0>;
is-decoded-cs = <0x0>;
num-cs = <0x3>;
};
spi@e0007000 {
compatible = "xlnx,zynq-spi-r1p6";
reg = <0xe0007000 0x1000>;
status = "okay";
interrupt-parent = <0x3>;
interrupts = <0x0 0x31 0x4>;
clocks = <0x1 0x1a 0x1 0x23>;
clock-names = "ref_clk", "pclk";
#address-cells = <0x1>;
#size-cells = <0x0>;
is-decoded-cs = <0x0>;
num-cs = <0x3>;
};
spi@e000d000 {
clock-names = "ref_clk", "pclk";
clocks = <0x1 0xa 0x1 0x2b>;
compatible = "xlnx,zynq-qspi-1.0";
status = "okay";
interrupt-parent = <0x3>;
interrupts = <0x0 0x13 0x4>;
reg = <0xe000d000 0x1000>;
#address-cells = <0x1>;
#size-cells = <0x0>;
is-dual = <0x0>;
num-cs = <0x1>;
flash@0 {
compatible = "micron,n25q128";
reg = <0x0>;
#address-cells = <0x1>;
#size-cells = <0x1>;
spi-max-frequency = <0x2faf080>;
partition@0x00000000 {
label = "boot";
reg = <0x0 0x500000>;
};
partition@0x00500000 {
label = "bootenv";
reg = <0x500000 0x20000>;
};
partition@0x00520000 {
label = "kernel";
reg = <0x520000 0xa80000>;
};
partition@0x00fa0000 {
label = "spare";
reg = <0xfa0000 0x0>;
};
};
};
memory-controller@e000e000 {
#address-cells = <0x1>;
#size-cells = <0x1>;
status = "disabled";
clock-names = "memclk", "aclk";
clocks = <0x1 0xb 0x1 0x2c>;
compatible = "arm,pl353-smc-r2p1";
interrupt-parent = <0x3>;
interrupts = <0x0 0x12 0x4>;
ranges;
reg = <0xe000e000 0x1000>;
flash@e1000000 {
status = "disabled";
compatible = "arm,pl353-nand-r2p1";
reg = <0xe1000000 0x1000000>;
#address-cells = <0x1>;
#size-cells = <0x1>;
};
flash@e2000000 {
status = "disabled";
compatible = "cfi-flash";
reg = <0xe2000000 0x2000000>;
#address-cells = <0x1>;
#size-cells = <0x1>;
};
};
ethernet@e000b000 {
compatible = "cdns,gem";
reg = <0xe000b000 0x1000>;
status = "okay";
interrupts = <0x0 0x16 0x4>;
clocks = <0x1 0x1e 0x1 0x1e 0x1 0xd>;
clock-names = "pclk", "hclk", "tx_clk";
#address-cells = <0x1>;
#size-cells = <0x0>;
phy-mode = "rgmii-id";
xlnx,ptp-enet-clock = <0x69f6bcb>;
local-mac-address = [00 0a 35 00 1e 53];
};
ethernet@e000c000 {
compatible = "cdns,gem";
reg = <0xe000c000 0x1000>;
status = "disabled";
interrupts = <0x0 0x2d 0x4>;
clocks = <0x1 0x1f 0x1 0x1f 0x1 0xe>;
clock-names = "pclk", "hclk", "tx_clk";
#address-cells = <0x1>;
#size-cells = <0x0>;
};
sdhci@e0100000 {
compatible = "arasan,sdhci-8.9a";
status = "okay";
clock-names = "clk_xin", "clk_ahb";
clocks = <0x1 0x15 0x1 0x20>;
interrupt-parent = <0x3>;
interrupts = <0x0 0x18 0x4>;
reg = <0xe0100000 0x1000>;
xlnx,has-cd = <0x1>;
xlnx,has-power = <0x0>;
xlnx,has-wp = <0x1>;
};
sdhci@e0101000 {
compatible = "arasan,sdhci-8.9a";
status = "okay";
clock-names = "clk_xin", "clk_ahb";
clocks = <0x1 0x16 0x1 0x21>;
interrupt-parent = <0x3>;
interrupts = <0x0 0x2f 0x4>;
reg = <0xe0101000 0x1000>;
xlnx,has-cd = <0x1>;
xlnx,has-power = <0x0>;
xlnx,has-wp = <0x1>;
};
slcr@f8000000 {
#address-cells = <0x1>;
#size-cells = <0x1>;
compatible = "xlnx,zynq-slcr", "syscon", "simple-bus";
reg = <0xf8000000 0x1000>;
ranges;
linux,phandle = <0x4>;
phandle = <0x4>;
clkc@100 {
#clock-cells = <0x1>;
compatible = "xlnx,ps7-clkc";
fclk-enable = <0x3>;
clock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x", "cpu_3or2x", "cpu_2x", "cpu_1x", "ddr2x", "ddr3x", "dci", "lqspi", "smc", "pcap", "gem0", "gem1", "fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1", "sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1", "dma", "usb0_aper", "usb1_aper", "gem0_aper", "gem1_aper", "sdio0_aper", "sdio1_aper", "spi0_aper", "spi1_aper", "can0_aper", "can1_aper", "i2c0_aper", "i2c1_aper", "uart0_aper", "uart1_aper", "gpio_aper", "lqspi_aper", "smc_aper", "swdt", "dbg_trc", "dbg_apb";
reg = <0x100 0x100>;
ps-clk-frequency = <0x1fca055>;
linux,phandle = <0x1>;
phandle = <0x1>;
};
pinctrl@700 {
compatible = "xlnx,pinctrl-zynq";
reg = <0x700 0x200>;
syscon = <0x4>;
};
};
dmac@f8003000 {
compatible = "arm,pl330", "arm,primecell";
reg = <0xf8003000 0x1000>;
interrupt-parent = <0x3>;
interrupt-names = "abort", "dma0", "dma1", "dma2", "dma3", "dma4", "dma5", "dma6", "dma7";
interrupts = <0x0 0xd 0x4 0x0 0xe 0x4 0x0 0xf 0x4 0x0 0x10 0x4 0x0 0x11 0x4 0x0 0x28 0x4 0x0 0x29 0x4 0x0 0x2a 0x4 0x0 0x2b 0x4>;
#dma-cells = <0x1>;
#dma-channels = <0x8>;
#dma-requests = <0x4>;
clocks = <0x1 0x1b>;
clock-names = "apb_pclk";
};
devcfg@f8007000 {
clock-names = "ref_clk", "fclk0", "fclk1", "fclk2", "fclk3";
clocks = <0x1 0xc 0x1 0xf 0x1 0x10 0x1 0x11 0x1 0x12>;
compatible = "xlnx,zynq-devcfg-1.0";
interrupt-parent = <0x3>;
interrupts = <0x0 0x8 0x4>;
reg = <0xf8007000 0x100>;
syscon = <0x4>;
};
timer@f8f00200 {
compatible = "arm,cortex-a9-global-timer";
reg = <0xf8f00200 0x20>;
interrupts = <0x1 0xb 0x301>;
interrupt-parent = <0x3>;
clocks = <0x1 0x4>;
};
timer@f8001000 {
interrupt-parent = <0x3>;
interrupts = <0x0 0xa 0x4 0x0 0xb 0x4 0x0 0xc 0x4>;
compatible = "cdns,ttc";
clocks = <0x1 0x6>;
reg = <0xf8001000 0x1000>;
};
timer@f8002000 {
interrupt-parent = <0x3>;
interrupts = <0x0 0x25 0x4 0x0 0x26 0x4 0x0 0x27 0x4>;
compatible = "cdns,ttc";
clocks = <0x1 0x6>;
reg = <0xf8002000 0x1000>;
};
timer@f8f00600 {
interrupt-parent = <0x3>;
interrupts = <0x1 0xd 0x301>;
compatible = "arm,cortex-a9-twd-timer";
reg = <0xf8f00600 0x20>;
clocks = <0x1 0x4>;
};
usb@e0002000 {
compatible = "xlnx,zynq-usb-2.20a", "chipidea,usb2";
status = "okay";
clocks = <0x1 0x1c>;
interrupt-parent = <0x3>;
interrupts = <0x0 0x15 0x4>;
reg = <0xe0002000 0x1000>;
phy_type = "ulpi";
dr_mode = "host";
};
usb@e0003000 {
compatible = "xlnx,zynq-usb-2.20a", "chipidea,usb2";
status = "disabled";
clocks = <0x1 0x1d>;
interrupt-parent = <0x3>;
interrupts = <0x0 0x2c 0x4>;
reg = <0xe0003000 0x1000>;
phy_type = "ulpi";
};
watchdog@f8005000 {
clocks = <0x1 0x2d>;
compatible = "cdns,wdt-r1p2";
interrupt-parent = <0x3>;
interrupts = <0x0 0x9 0x1>;
reg = <0xf8005000 0x1000>;
reset-on-timeout;
timeout-sec = <0x2>;
};
};
};
另外，要将uio驱动编译进内核还需要添加如下文件enable-uio.cfg
CONFIG_UIO=y
CONFIG_UIO_PDRV_GENIRQ=y
CONFIG_UIO_DMEM_GENIRQ=y
内核 bootargs 必须包含最后一部分
bootargs=console=ttyPS0,115200 root=/dev/mmcblk0p1 rw rootwait earlyprintk uio_pdrv_genirq.of_id=generic-uio
注意:我的配置引用了 uio_dmem_genirq，但它似乎不起作用。我的解决方法是使用 reserved-memory 条目，但我没有明确验证它
关于linux - 应如何通过设备树配置 uio_dmem_genirq 驱动程序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48538357/