Linux/AM4378: GPIO output configuration

Tool/software: Linux

Dear,

Our board is broadly based on AM437X-gp-evm and SDK is 4.02. I have connected general purpose pin to enable/ disable for my uart chip.

I want to make gpio5_28  & gpio5_29 pins high. Here is my dts entry related to my need.

&gpio5 {
pinctrl-names = "default";
pinctrl-0 = <&gpio5_pins_default>;
status = "okay";

p28 {
gpio-hog;
gpios = <28 GPIO_ACTIVE_HIGH>;
output-high;
lines-name = "rs232-2-TX-Enable";
};
p29 {
gpio-hog;
gpios = <29 GPIO_ACTIVE_HIGH>;
output-high;
lines-name = "rs232-1-TX-Enable";
};
};

gpio5_pins_default: gpio5_pins_default {
pinctrl-single,pins = <
0x250 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (P25) spi4_sclk.gpio5[4] */
0x254 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (R24) spi4_d0.gpio5[5] */
0x258 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (P24) spi4_d1.gpio5[6] */
0x25c ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (N25) spi4_cs0.gpio5[7] */
0x238 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (D25) gpio5_8.gpio5[8] */
0x23c ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (F24) gpio5_9.gpio5[9] */
0x244 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (F23) gpio5_11.gpio5[11] */
/*extra 3 digital input entry for adding 8 gpi */
0x24c ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* (E24) gpio5_13.gpio5[13] */
0x208 ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* (AE18) cam0_data0.gpio5[19] */
0x20c ( PIN_INPUT_PULLUP | MUX_MODE7 ) /* (AB18) cam0_data1.gpio5[20] */
/* 4 output pin for rs485 direction control */
0x270 ( PIN_OUTPUT_PULLUP | MUX_MODE9 ) /* (D24) xdma_event_intr0.gpio5[28] */
0x274 ( PIN_OUTPUT_PULLUP | MUX_MODE9 ) /* (C24) xdma_event_intr1.gpio5[29] */
0x230 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (H22) uart3_ctsn.gpio5[0] */
0x234 ( PIN_OUTPUT_PULLUP | MUX_MODE7 ) /* (K24) uart3_rtsn.gpio5[1] */
>;
};

How do i make gpio pin HIGH or LOW?

Regards,

Winiston.P