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器件型号：DRA821U Thread 中讨论的其他器件：J7200XSOMXEVM
工具与软件：
大家好、团队成员：
我们 已根据 J7200XSOMXEVM 参考设计设计设计了定制电路板。
我们正在使用 PROCESSOR-SDK-LINUX-RT J7200(10.00.07.03)为定制电路板开发软件。
定制电路板的 MCU_CPSW 具有以下配置。
要启用 MCU_CLKOUT0时钟输出、将 CTRL_MMR_CFG0_MCU_CLKOUT0_CTRL 寄存器(0x40F08010)的位4设置为1。
但是、MCU_CLKOUT0时钟不输出。
[设备树]
&wkup_pmx2 {
...
ethernet_pins_default: ethernet-pins_default-pins {
pinctrl-single,pins = <
J721E_WKUP_IOPAD(0x00, PIN_INPUT, 1) /* (D11) MCU_RGMII1_TX_CTL.MCU_RMII1_CRS_DV */
J721E_WKUP_IOPAD(0x04, PIN_INPUT, 1) /* (A11) MCU_RGMII1_RX_CTL.MCU_RMII1_RX_ER */
J721E_WKUP_IOPAD(0x10, PIN_OUTPUT, 1) /* (B11) MCU_RGMII1_TD1.MCU_RMII1_TXD1 */
J721E_WKUP_IOPAD(0x14, PIN_OUTPUT, 1) /* (D10) MCU_RGMII1_TD0.MCU_RMII1_TXD0 */
J721E_WKUP_IOPAD(0x18, PIN_OUTPUT, 1) /* (A12) MCU_RGMII1_TXC.MCU_RMII1_TX_EN */
J721E_WKUP_IOPAD(0x1c, PIN_INPUT, 1) /* (B10) MCU_RGMII1_RXC.MCU_RMII1_REF_CLK */
J721E_WKUP_IOPAD(0x28, PIN_INPUT, 1) /* (B9) MCU_RGMII1_RD1.MCU_RMII1_RXD1 */
J721E_WKUP_IOPAD(0x2c, PIN_INPUT, 1) /* (A9) MCU_RGMII1_RD0.MCU_RMII1_RXD0 */
>;
};
dp83822_mdio_pins_default: dp83822-mdio-default-pins {
pinctrl-single,pins = <
J721E_WKUP_IOPAD(0x34, PIN_OUTPUT, 0) /* (D9) MCU_MDIO0_MDC */
J721E_WKUP_IOPAD(0x30, PIN_INPUT, 0) /* (C9) MCU_MDIO0_MDIO */
>;
};
mcu_clkout_pins_default: mcu-clkout-default-pins {
pinctrl-single,pins = <
J721E_WKUP_IOPAD(0x83, PIN_OUTPUT, 6) /* (C16) WKUP_GPIO0_11.MCU_CLKOUT0 */
>;
};
...
};
...
&mcu_cpsw {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <ðernet_pins_default>, <&dp83822_mdio_pins_default>;
};
&davinci_mdio {
status = "okay";
phy0: ethernet-phy@0 {
reg = <0>;
rx-internal-delay-ps = <1>;
tx-internal-delay-ps = <1>;
};
};
&cpsw_port1 {
status = "okay";
phy-mode = "rmii";
phy-handle = <&phy0>;
};
...
[CTRL_MMR_CFG0_MCU_CLKOUT0_CTRL]
~# devmem2 0x40F08010 /dev/mem opened. Memory mapped at address 0xffff93904000. Read at address 0x40F08010 (0xffff93904010): 0x00000000 ~# devmem2 0x40F08010 w 0x10 /dev/mem opened. Memory mapped at address 0xffffafc80000. Read at address 0x40F08010 (0xffffafc80010): 0x00000000 Write at address 0x40F08010 (0xffffafc80010): 0x00000010, readback 0x00000010 ~# devmem2 0x40F08010 /dev/mem opened. Memory mapped at address 0xffff9e1f4000. Read at address 0x40F08010 (0xffff9e1f4010): 0x00000010
我们如何启用 MCU_CLKOUT0时钟输出？
此外、是否可以在器件树设置中将 CTRL_MMR_CFG0_MCU_CLKOUT0_CTRL 的第4位设置为1？
此致、
Mizutani
