Configuring gpio-keys

Hi everyone,

I'm trying to configure the SW1, SW2, SW3, SW4 and SW5 of my PicoZed FMC Carrier FMC V2. But it doesn't work and right know I'm stucked. This is part of my device tree dts file where I configure this pins:

...

amba_pl {

#address-cells = <0x1>;

#size-cells = <0x1>;

compatible = "simple-bus";

ranges;

...

ps7_gpio_buttons: gpio@41210000 {

#gpio-cells = <0x2>;

compatible = "xlnx,xps-gpio-1.00.a";

gpio-controller;

reg = <0x41210000 0x10000>;

xlnx,all-inputs = <0x1>;

xlnx,all-inputs-2 = <0x0>;

xlnx,all-outputs = <0x0>;

xlnx,all-outputs-2 = <0x0>;

xlnx,dout-default = <0x0>;

xlnx,dout-default-2 = <0x0>;

xlnx,gpio-width = <0x5>;

xlnx,gpio2-width = <0x20>;

xlnx,interrupt-present = <0x0>;

xlnx,is-dual = <0x0>;

xlnx,tri-default = <0xffffffff>;

xlnx,tri-default-2 = <0xffffffff>;

};

...

keypad {

compatible = "gpio-keys";

#address-cells = <1>;

#size-cells = <0>;

sw1 {

label = "sw1";

gpios = <&ps7_gpio_buttons 0 0>;

linux,code = <100>; /* up */

};

sw2 {

label = "sw2";

gpios = <&ps7_gpio_buttons 1 0>;

linux,code = <101>; /* down */

};

sw3 {

label = "sw3";

gpios = <&ps7_gpio_buttons 2 0>;

linux,code = <102>; /* right */

};

sw4 {

label = "sw4";

pios = <&ps7_gpio_buttons 3 0>;

linux,code = <103>; /* left */

};

sw5 {

label = "sw5";

gpios = <&ps7_gpio_buttons 4 0>;

linux,code = <104>; /* center */

...

I can see the associated gpio in /sys/class/gpio897

But I've got this error and it doesn't work:

gpio-keys keypad: Unable to get irq number for GPIO 897, error -6

Could anyone help me?

Best regards.

Parents

0 oscargomezf over 8 years ago

Hi everyone,

I've tried to do the same but using a GPIO from PS, the PS_MIO51 due to the fact the picoZed FMC Carrier V2 has a SW called SW6, and it's very easy to try it. This is my device tree:
...
ps7_gpios: gpio@e000a000 {
compatible = "xlnx,zynq-gpio-1.0";
#gpio-cells = <0x2>;
#interrupt-cells = <0x2>;
clocks = <0x1 0x2a>;
  gpio-controller;
interrupt-controller;
interrupt-parent = <0x3>;
interrupts = <0x0 0x14 0x4>;
reg = <0xe000a000 0x1000>;
  emio-gpio-width = <0x40>;
gpio-mask-high = <0x0>;
  gpio-mask-low = <0x5600>;
  linux,phandle = <0x5>;
phandle = <0x5>;
};
...
keypad {
sw6 {
label = "sw6";
  gpios = <&ps7_gpios 51 0>;
linux,code = <150>; /* SW6: PS_PB */
};
};
...
And it works perfectly, I can see the file event0:
root@picoted:/dev/input# ls -l
crw-rw---- 1 root root 13, 64 Jan 1 00:00 event0
crw-rw---- 1 root root 13, 63 Jan 1 00:00 mice

And I can see thw SW6 interrupt in the file /proc/interrupts:
root@picoted:/dev/input# cat /proc/interrupts
CPU0 CPU1
16: 1 0 GIC 27 Edge gt
17: 0 0 GIC 43 Level ttc_clockevent
18: 2436 4051 GIC 29 Edge twd
21: 43 0 GIC 39 Level f8007100.adc
74: 53 0 zynq-gpio 51 Edge sw6
141: 0 0 GIC 57 Level cdns-i2c
142: 0 0 GIC 80 Level cdns-i2c
144: 0 0 GIC 35 Level f800c000.ocmc
145: 761 0 GIC 82 Level xuartps
146: 0 0 GIC 51 Level e000d000.spi
147: 554 0 GIC 54 Level eth0
148: 75 0 GIC 56 Level mmc0
149: 0 0 GIC 45 Level f8003000.dmac
150: 0 0 GIC 46 Level f8003000.dmac
151: 0 0 GIC 47 Level f8003000.dmac
152: 0 0 GIC 48 Level f8003000.dmac
153: 0 0 GIC 49 Level f8003000.dmac
154: 0 0 GIC 72 Level f8003000.dmac
155: 0 0 GIC 73 Level f8003000.dmac
156: 0 0 GIC 74 Level f8003000.dmac
157: 0 0 GIC 75 Level f8003000.dmac
158: 0 0 GIC 40 Level f8007000.devcfg
165: 0 0 GIC 41 Edge f8005000.watchdog
IPI1: 0 0 Timer broadcast interrupts
IPI2: 843 1413 Rescheduling interrupts
IPI3: 0 0 Function call interrupts
IPI4: 24 24 Single function call interrupts
IPI5: 0 0 CPU stop interrupts
IPI6: 0 0 IRQ work interrupts
IPI7: 0 0 completion interrupts
Err: 0

So I think it's something related to the type of GPIO used, PS (Processing System) vs PL (Programmble Logic).

Any suggestion?

Best regards.
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0 oscargomezf over 8 years ago

Hi everyone,

I've tried to do the same but using a GPIO from PS, the PS_MIO51 due to the fact the picoZed FMC Carrier V2 has a SW called SW6, and it's very easy to try it. This is my device tree:
...
ps7_gpios: gpio@e000a000 {
compatible = "xlnx,zynq-gpio-1.0";
#gpio-cells = <0x2>;
#interrupt-cells = <0x2>;
clocks = <0x1 0x2a>;
  gpio-controller;
interrupt-controller;
interrupt-parent = <0x3>;
interrupts = <0x0 0x14 0x4>;
reg = <0xe000a000 0x1000>;
  emio-gpio-width = <0x40>;
gpio-mask-high = <0x0>;
  gpio-mask-low = <0x5600>;
  linux,phandle = <0x5>;
phandle = <0x5>;
};
...
keypad {
sw6 {
label = "sw6";
  gpios = <&ps7_gpios 51 0>;
linux,code = <150>; /* SW6: PS_PB */
};
};
...
And it works perfectly, I can see the file event0:
root@picoted:/dev/input# ls -l
crw-rw---- 1 root root 13, 64 Jan 1 00:00 event0
crw-rw---- 1 root root 13, 63 Jan 1 00:00 mice

And I can see thw SW6 interrupt in the file /proc/interrupts:
root@picoted:/dev/input# cat /proc/interrupts
CPU0 CPU1
16: 1 0 GIC 27 Edge gt
17: 0 0 GIC 43 Level ttc_clockevent
18: 2436 4051 GIC 29 Edge twd
21: 43 0 GIC 39 Level f8007100.adc
74: 53 0 zynq-gpio 51 Edge sw6
141: 0 0 GIC 57 Level cdns-i2c
142: 0 0 GIC 80 Level cdns-i2c
144: 0 0 GIC 35 Level f800c000.ocmc
145: 761 0 GIC 82 Level xuartps
146: 0 0 GIC 51 Level e000d000.spi
147: 554 0 GIC 54 Level eth0
148: 75 0 GIC 56 Level mmc0
149: 0 0 GIC 45 Level f8003000.dmac
150: 0 0 GIC 46 Level f8003000.dmac
151: 0 0 GIC 47 Level f8003000.dmac
152: 0 0 GIC 48 Level f8003000.dmac
153: 0 0 GIC 49 Level f8003000.dmac
154: 0 0 GIC 72 Level f8003000.dmac
155: 0 0 GIC 73 Level f8003000.dmac
156: 0 0 GIC 74 Level f8003000.dmac
157: 0 0 GIC 75 Level f8003000.dmac
158: 0 0 GIC 40 Level f8007000.devcfg
165: 0 0 GIC 41 Edge f8005000.watchdog
IPI1: 0 0 Timer broadcast interrupts
IPI2: 843 1413 Rescheduling interrupts
IPI3: 0 0 Function call interrupts
IPI4: 24 24 Single function call interrupts
IPI5: 0 0 CPU stop interrupts
IPI6: 0 0 IRQ work interrupts
IPI7: 0 0 completion interrupts
Err: 0

So I think it's something related to the type of GPIO used, PS (Processing System) vs PL (Programmble Logic).

Any suggestion?

Best regards.
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