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标题: AM5728 SPI4驱动问题 [打印本页]

作者: zhao279 时间: 2018-8-11 17:39
标题: AM5728 SPI4驱动问题
您好：目前调试am5728的spi2跟spi4的驱动，spi2已经通信正常，但是spi4能看到设备的驱动 spidev3.0 ，也可以读写，但是就是硬件引脚没有时钟也没有数据，spi4我使用的引脚是[attach]3377[/attach]，设备树主要是在am57xx-beagle-x15-common.dtsi，增加
spi2_pins: spi2_pins {
  pinctrl-single,pins = <
DRA7XX_CORE_IOPAD(0x37c0, (PIN_INPUT_PULLUP | MUX_MODE0))       /* CTRL_CORE_PAD_SPI2_SCLK (A26) */
DRA7XX_CORE_IOPAD(0x37c4, (PIN_INPUT_PULLUP | MUX_MODE0)) /* CTRL_CORE_PAD_SPI2_D1 (B22) */
DRA7XX_CORE_IOPAD(0x37c8, (PIN_OUTPUT_PULLUP | MUX_MODE0))       /* CTRL_CORE_PAD_SPI2_D0 (G17) */
DRA7XX_CORE_IOPAD(0x37cc, (PIN_OUTPUT_PULLUP | MUX_MODE0)) /*  CTRL_CORE_PAD_SPI2_CS0 (B24) */
  >;
};

spi4_pins: spi4_pins {
  pinctrl-single,pins = <
DRA7XX_CORE_IOPAD(0x3460, (PIN_INPUT_PULLUP | MUX_MODE8))       /*  CTRL_CORE_PAD_GPMC_A8 (G1) */
DRA7XX_CORE_IOPAD(0x3464, (PIN_INPUT_PULLUP | MUX_MODE8))       /* CTRL_CORE_PAD_GPMC_A9 (G6) */
DRA7XX_CORE_IOPAD(0x3468, (PIN_OUTPUT_PULLUP | MUX_MODE8))       /* CTRL_CORE_PAD_GPMC_A10 (F3) */
DRA7XX_CORE_IOPAD(0x346c, (PIN_OUTPUT_PULLUP | MUX_MODE8)) /* CTRL_CORE_PAD_GPMC_A11 (F2) */
  >;
};

&mcspi2 {
pinctrl-names = "default";
pinctrl-0 = <&spi2_pins>;
ti,pindir-d0-out-d1-in;
status = "okay";
spi2@0 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "rohm,dh2228fv";
reg = <0>;
spi-max-frequency = <48000000>;
spi-cpha;
};
};
&mcspi4 {
pinctrl-names = "default";
pinctrl-0 = <&spi4_pins>;
ti,pindir-d0-out-d1-in;
status = "okay";
spi4@0 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "rohm,dh2228fv";
reg = <0>;
spi-max-frequency = <48000000>;
spi-cpha;
};
};

同样的配置，spi2已经正常，spi4始终不行，您核心板上面spi4引脚的默认配置是什么？或者我哪里设置有问题呢？十分感谢

作者: zhao279 时间: 2018-8-12 12:41
问题找到了。引脚复用地址不对，谢谢

作者: czs----Tronlong 时间: 2018-8-12 16:40
感谢您的分享！

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