I created an overlay that utilizes a pca9544 i2c multiplexer and it finally
works.
I found this in
linux-4.1.13-ti-r35\Documentation\devicetree\bindings\i2c\i2c-mux-pca954x.txt
*Optional Properties: - reset-gpios: Reference to the GPIO connected to the
reset input.*And in
linux-4.1.13-ti-r35\Documentation\devicetree\bindings\i2c\i2c-mux-gpio.txt
they have it used within the example as follows
* i2cmux { compatible = "i2c-mux-gpio"; #address-cells =
<1>; #size-cells = <0>; mux-gpios = <&gpio1 22 0 &gpio1 23
0>; i2c-parent = <&i2c1>; i2c@1 { reg = <1>;
#address-cells = <1>; #size-cells = <0>;
ssd1307: oled@3c { compatible = "solomon,ssd1307fb-i2c";
reg = <0x3c>; pwms = <&pwm 4 3000>;
reset-gpios = <&gpio2 7 1>; reset-active-low;
}; };*Issue is I cannot compile my overlay IF the line *reset-gpios
= <&gpio1 18 0> *is present,
I've also tried adding this to my &am33xx_pinmux fragment:
*gpio50: gpio50{ pinctrl-single,pins = <0x048 0x17>; /*
Define gpio50, set fast, pull-up, Mode 7 */ };*and changing the line in
question to:
*reset-gpios = <&gpio50>*I've also seen it written as "reset-gpio ="
without the s but that also fails.
Currently I can get around not having a reset by having my bootscript
toggle that GPIO on boot but without the script, I cannot get it to work.
I don't understand if I am suppose to "include" or reference anything
within my dts in order to use certain syntax and I have no idea how to do
it.
So I'd like two questions answered if possible,
*1) What am I doing wrong by adding that line2) How do I compile a dts with
"includes"?*Thank you in advance.
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