Well, to summarize you have to compile the kernel 4.4: in the menu of the
configuration, you switch to omap-serial.c
<http://elixir.free-electrons.com/linux/v4.4.79/source/drivers/tty/serial/omap-serial.c>
with CONFIG_SERIAL_OMAP
and on the device tree you have to put something like :
&am33xx_pinmux {
....
uart1_pins: pinmux_uart1_pins {
pinctrl-single,pins = <
AM33XX_IOPAD(0x980, PIN_INPUT | MUX_MODE0) /* P9.26 uart1_rxd.uart1_rxd
INPUT OK*/
AM33XX_IOPAD(0x984, PIN_OUTPUT | MUX_MODE0) /* P9.24 uart1_txd.uart1_txd
OUTPUT OK*/
AM33XX_IOPAD(0x9a4, PIN_OUTPUT | MUX_MODE7) /* TX enable GPIO 3_19 OK*/
AM33XX_IOPAD(0x848, PIN_OUTPUT | MUX_MODE7) /* RX enable P9.14 GPIO 1_18
mode 7 OK*/
>;
};
.....
};
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&uart1_pins>;
status = "okay";
rts-gpio = <&gpio3 19 GPIO_ACTIVE_HIGH>; // 3_19
cts-gpio = <&gpio1 18 GPIO_ACTIVE_HIGH>; // 1_18
rs485-rts-active-high;
rs485-rts-delay = <0 0>;
linux,rs485-enabled-at-boot-time;
};
Enjoy !
Micka,
Le mer. 2 août 2017 à 17:33, Angelo Fares Menhem <[email protected]> a
écrit :
> Eldo
>
> Attached are the prints of my chat wit Michael Musset.
>
> Please follow his instructions.
>
> He kindly offered to help us via email.
>
> If necessary send him a message copying me.
>
> Regards
>
>
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