AM5718 cofig interrupt

chaya bay

I need gpio5_1 to be interrupt for my keypad

i want to config it in dts and to use "gpio-keys" as the driver for this interrupt .

i added in am571x-idk.dts that path of code:

&gpio5 {
keypad_interrupt: gpio_keys {
compatible = "gpio-keys";
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&gpio5>;

keypad_button@1 {
label = "Keypad Button";
gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
linux,code = "KEY_ENTER";

gpio-key,wakeup;
};
};
};

but in kernel i dont see in file system that path:
* There are 4 attributes under /sys/devices/platform/gpio-keys/ (from gpio_keys.c)

in the defconfig file i have

CONFIG_KEYBOARD_GPIO=y

what is the problem?

over 1 year ago

0 Josue Zamitiz-Ayala over 1 year ago

TI__Mastermind 31645 points

Hello Chaya,

Please see if the below threads help you get further:
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/729711/linux-am5728-gpio-configuration
e2e.ti.com/.../linux-am5728-device-tree-node-interrupt-in-am5728-evm

-Josue

0 chaya bay over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 20 points

Hi,

thanks for the answer ,

I was read the files you senf me ,

now i need more help

in dra-l4.dtsi i have :

target-module@5b000 { /* 0x4805b000, ap 19 1e.0 */
compatible = "ti,sysc-omap2", "ti,sysc";
reg = <0x5b000 0x4>,
<0x5b010 0x4>,
<0x5b114 0x4>;
reg-names = "rev", "sysc", "syss";
ti,sysc-mask = <(SYSC_OMAP2_ENAWAKEUP |
SYSC_OMAP2_SOFTRESET |
SYSC_OMAP2_AUTOIDLE)>;
ti,sysc-sidle = <SYSC_IDLE_FORCE>,
<SYSC_IDLE_NO>,
<SYSC_IDLE_SMART>,
<SYSC_IDLE_SMART_WKUP>;
ti,syss-mask = <1>;
/* Domains (P, C): l4per_pwrdm, l4per_clkdm */
clocks = <&l4per_clkctrl DRA7_L4PER_GPIO5_CLKCTRL 0>,
<&l4per_clkctrl DRA7_L4PER_GPIO5_CLKCTRL 8>;
clock-names = "fck", "dbclk";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x5b000 0x1000>;

gpio5: gpio@0 {
compatible = "ti,omap4-gpio";
reg = <0x0 0x200>;
interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;

};
};

now i added in the dts file

&gpio5 {
gpio-keys {
compatible = "gpio-keys";
#address-cells = <1>;
#size-cells = <0>;
autorepeat;

user1 {
gpios = <&gpio5 28 GPIO_ACTIVE_LOW>;
label = "Up";
linux,code = <KEY_UP>;
};
};
};

i saw in my target that lin:

i didnt understand what is that line:

linux,code = <KEY_UP>;

i have keypad with 12 buttons they have one interrupt in gpio5_1 that interrupts them .

can you help me?

0 Josue Zamitiz-Ayala over 1 year ago in reply to chaya bay

TI__Mastermind 31645 points

Hello Chaya,

I will be out of the office until 11/28 due to holiday.

I appreciate your patience.

-Josue

0 Josue Zamitiz-Ayala over 1 year ago in reply to Josue Zamitiz-Ayala

TI__Mastermind 31645 points

Hello Chaya,

See this file: https://www.kernel.org/doc/Documentation/devicetree/bindings/input/gpio-keys.txt
Specifically:

Each button (key) is represented as a sub-node of "gpio-keys":
Subnode properties:

	- gpios: OF device-tree gpio specification.
	- interrupts: the interrupt line for that input.
	- label: Descriptive name of the key.
	- linux,code: Keycode to emit.

See https://github.com/torvalds/linux/blob/master/include/uapi/linux/input-event-codes.h for the different key codes.

This use case is not a part of our standard offering for AM57x, therefore I suggest you google guides on enabling a keyboard/keypad for your application.

Regards,

Josue

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AM5718 cofig interrupt