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标题: AM437X移植ads7846有中断，没事件，急急急在线等 [打印本页]

作者: xjtxzg 时间: 2019-5-24 10:11
标题: AM437X移植ads7846有中断，没事件，急急急在线等
root@am437x-evm:/dev/input# cat /proc/interrupts
.....
97: 1107 48322000.gpio 7 Edge ads7846
root@am437x-evm:/dev/input# cat /proc/bus/input/devices
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="ADS7846 Touchscreen"
P: Phys=spi1.0/input0
S: Sysfs=/devices/platform/44000000.ocp/481a2000.spi/spi_master/spi1/spi1.0/input/input0
U: Uniq=
H: Handlers=event0
B: PROP=0
B: EV=b
B: KEY=400 0 0 0 0 0 0 0 0 0 0
B: ABS=1000003

root@am437x-evm:/dev/input# cat event0

触摸屏幕，没有任何打印。。。。。。。。。。。。。。。。。。

作者: 梁淑怡-Tronlong 时间: 2019-5-24 11:37
您好，
1.请确认设备树文件已配置好Pinmux和节点。2.确认设备树文件已替换成功。
3.查看在文件系统/dev/input/目录下有没有产生eventX的节点。
再执行od -x /dev/input/eventX ,然后触摸LCD看是否有打印东西。有打印信息就表示配置正常。

作者: xjtxzg 时间: 2019-5-24 13:48
梁工您好
dts文件相关部分：
ads7846reg: ads7846-reg { /* 4 line touch screen driver */
      compatible = "regulator-fixed";
      regulator-name = "ads7846-reg";
      regulator-min-microvolt = <3300000>;
      regulator-max-microvolt = <3300000>;
};

#if 0
pixcir_ts_pins: pixcir_ts_pins {
      pinctrl-single,pins = <
         AM4372_IOPAD(0xa64, PIN_INPUT_PULLUP | MUX_MODE7)  /* spi2_d0.gpio3_22 */
      >;
};
#endif

spi2_pins: spi2_pins {          /*4 wire touch screen driver chip */
      pinctrl-single,pins = <
         AM4372_IOPAD(0xa60, INPUT_EN | MUX_MODE0)  /* mcspi2_sclk mode 0*/
         AM4372_IOPAD(0xa64, INPUT_EN | MUX_MODE0)  /* 268 mcspi2_d0 mode 0*/
         AM4372_IOPAD(0xa68, INPUT_EN | MUX_MODE0)  /* 264 mcspi2_d1 mode 0*/
         AM4372_IOPAD(0xa6c, PIN_OUTPUT_PULLUP | MUX_MODE0)  /* mcspi2_cs0 mode 0*/
      >;
};

ads7846_pins: ads7846_pins {
      pinctrl-single,pins = <
         AM4372_IOPAD(0xa5c, PIN_INPUT_PULLUP | MUX_MODE7)  /* spi4_cs0..gpio5_7 */
      >;
};

&spi2 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi2_pins>;

ads7846@0 {
      pinctrl-names = "default";
      pinctrl-0 = <&ads7846_pins>;

      compatible = "ti,ads7846";
      vcc-supply = <&ads7846reg>;

      reg = <0>;          /* CS0 */
      spi-max-frequency = <1500000>;

      interrupt-parent = <&gpio5>;
      interrupts = <7 0>;       /* gpio5_7 */
      pendown-gpio = <&gpio5 7 0>;

      ti,x-min = /bits/ 16 <0x0>;
      ti,x-max = /bits/ 16 <0x0fff>;
      ti,y-min = /bits/ 16 <0x0>;
      ti,y-max = /bits/ 16 <0x0fff>;

      ti,x-plate-ohms = /bits/ 16 <180>;
      ti,pressure-max = /bits/ 16 <255>;

      ti,debounce-max = /bits/ 16 <10>;
      ti,debounce-tol = /bits/ 16 <30>;
      ti,debounce-rep = /bits/ 16 <1>;

      ti,settle-delay-usec = /bits/ 16 <150>;
      ti,keep-vref-on = <1>;

      linux,wakeup;
};
};

作者: xjtxzg 时间: 2019-5-28 14:16

梁淑怡-Tronlong 发表于 2019-5-24 11:37
您好，
1.请确认设备树文件已配置好Pinmux和节点。2.确认设备树文件已替换成功。
3.查看在文件系统/dev ...

梁工您好
dts文件相关部分：
ads7846reg: ads7846-reg { /* 4 line touch screen driver */
      compatible = "regulator-fixed";
      regulator-name = "ads7846-reg";
      regulator-min-microvolt = <3300000>;
      regulator-max-microvolt = <3300000>;
};

#if 0
pixcir_ts_pins: pixcir_ts_pins {
      pinctrl-single,pins = <
         AM4372_IOPAD(0xa64, PIN_INPUT_PULLUP | MUX_MODE7)  /* spi2_d0.gpio3_22 */
      >;
};
#endif

spi2_pins: spi2_pins {          /*4 wire touch screen driver chip */
      pinctrl-single,pins = <
         AM4372_IOPAD(0xa60, INPUT_EN | MUX_MODE0)  /* mcspi2_sclk mode 0*/
         AM4372_IOPAD(0xa64, INPUT_EN | MUX_MODE0)  /* 268 mcspi2_d0 mode 0*/
         AM4372_IOPAD(0xa68, INPUT_EN | MUX_MODE0)  /* 264 mcspi2_d1 mode 0*/
         AM4372_IOPAD(0xa6c, PIN_OUTPUT_PULLUP | MUX_MODE0)  /* mcspi2_cs0 mode 0*/
      >;
};

ads7846_pins: ads7846_pins {
      pinctrl-single,pins = <
         AM4372_IOPAD(0xa5c, PIN_INPUT_PULLUP | MUX_MODE7)  /* spi4_cs0..gpio5_7 */
      >;
};

&spi2 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi2_pins>;

ads7846@0 {
      pinctrl-names = "default";
      pinctrl-0 = <&ads7846_pins>;

      compatible = "ti,ads7846";
      vcc-supply = <&ads7846reg>;

      reg = <0>;          /* CS0 */
      spi-max-frequency = <1500000>;

      interrupt-parent = <&gpio5>;
      interrupts = <7 0>;       /* gpio5_7 */
      pendown-gpio = <&gpio5 7 0>;

      ti,x-min = /bits/ 16 <0x0>;
      ti,x-max = /bits/ 16 <0x0fff>;
      ti,y-min = /bits/ 16 <0x0>;
      ti,y-max = /bits/ 16 <0x0fff>;

      ti,x-plate-ohms = /bits/ 16 <180>;
      ti,pressure-max = /bits/ 16 <255>;

      ti,debounce-max = /bits/ 16 <10>;
      ti,debounce-tol = /bits/ 16 <30>;
      ti,debounce-rep = /bits/ 16 <1>;

      ti,settle-delay-usec = /bits/ 16 <150>;
      ti,keep-vref-on = <1>;

      linux,wakeup;
};
};

作者: czs----Tronlong 时间: 2019-6-4 21:38
Dear ,

根据您的实际调试情况，需要修改设备树配置

ti，x-plate-ohms = / bits / 16 <180>;

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