Hi all, this is my first post, I have a question about dts implementation
for my BananaPi m2 ultra. I was looking for hints in previous posts, and
other places, with no luck. Sorry if it´s a begginer question.
I´m trying to modify my dts file to add support for GPIO (no through
gpio-leds, direct GPIO support). My scenario is:
HW: BananaPi-m2-ultra
O.S.: Armbian.
kernel version: 4.19.36-sunxi
I added a child node to the standard pinctrl descrpition:
pio: pinctrl@1c20800 {
compatible = "allwinner,sun8i-r40-pinctrl";
reg = <0x1c20800 0x400>;
interrupts = <0x0 0x1c 0x4>;
clocks = <0x7 0x4f 0x2 0x4>;
clock-names = "apb", "hosc", "losc";
gpio-controller;
interrupt-controller;
#interrupt-cells = <0x3>;
#gpio-cells = <0x3>;
pinctrl-names = "default";
pinctrl-0 = <0x13>;
phandle = >0xd>;
clk-out-a-pin {
pins = "PI12";
function = "clk_out_a";
drive = <0x0>;
pull = <0x0>;
phandle = <0x13>;
};
/* A lot of child node */
/* My child node */
myCustomOutput {
allwinner,pins = "PH3";
allwinner,function = "myOutput";
allwinner,drive = "1"; /* 20mA capable output */
};
}; /* End of pio */
So, when I want to implement the client node for myCustomOutputs I don't
figure what the value for compatible property must to be.
At root level, I want to write:
myOutput {
compatible = "?????"; /* What value must be here */
gpios = <0x7 0x3 GPIO_ACTIVE_HIGH>;
};
Could please somebody point me in the right direction?
Thanks in advance!
Mariano
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