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Linux/AM4379: Enabling CLKOUT2

Part Number: AM4379
Other Parts Discussed in Thread: AM4372

Tool/software: Linux

Hi,

I am having custom board and i am using ti-processor-sdk-linux-rt-am437x-evm-04.02.00.09 . am437x-gp-evm.dtsour board has wlan (wg7831 module) connected over mmc3 interface  and it requires slow clock to be enabled from the processor C24 pin XDMA_EVENT_INTR1  . In muxmode 3 it is configured as CLKOUT2 .

I have done following changes in my dts i,e. am437x-gp-evm.dts in kernel

&am43xx_pinmux {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&clkout2_pin &wlan_pins_default &gpio_pins &ddr3_vtt_toggle_default &unused_pins &debugss_pins>;

 

clkout2_pin: clkout_pin {
pinctrl-single,pins = <
AM4372_IOPAD(0xa74, PIN_OUTPUT_PULLUP | MUX_MODE3) /* xdma_event_intr1.gpio5_6 CLKOUT2 */
>;
};

 

after this changes i don't see any clock generated from the processor.please let me know if i am missing any configuration in kernel or should i enable this clock in u-boot to enable 32khz clock on that pin.

Regards,

vimal