Hi,
I've written a pinconf + pinmux driver for the pxa2xx architectures. Before
posting it I wanted to see the integration of the gpio driver and the pincontrol
one.
My trouble is that the gpio-pxa.c gpio driver adds one gpiochip for each bank,
ie. for pxa27x we have the output in [1], ie 4 gpiochips of 32 gpios each.
But the trick is that a single devicetree node triggers the creation of the 4
gpio chips :
gpio: gpio@40e00000 {
compatible = "mrvl,pxa-gpio";
#address-cells = <0x1>;
#size-cells = <0x1>;
reg = <0x40e00000 0x10000>;
gpio-controller;
#gpio-cells = <0x2>;
interrupts = <10>;
interrupt-names = "gpio_mux";
interrupt-controller;
#interrupt-cells = <0x2>;
ranges;
gcb0: gpio@40e00000 {
reg = <0x40e00000 0x4>;
};
gcb1: gpio@40e00004 {
reg = <0x40e00004 0x4>;
};
gcb2: gpio@40e00008 {
reg = <0x40e00008 0x4>;
};
gcb3: gpio@40e0000c {
reg = <0x40e0000c 0x4>;
};
};
Now if I put a line like this (knowing the pinctrl has 128 pins) :
gpio-ranges = <&pinctrl 0 0 128>;
It will add :
- map pins 0..127 to gpio 0..31 on gpiochip0
- map pins 0..127 to gpio 32..63 on gpiochip1
- etc ...
Now the question, is there a way to fix this without changing the gpio-pxa
driver to add only 1 gpiochip ?
Cheers.
--
Robert
[1] $ cat /sys/kernel/debug/gpio
GPIOs 0-31, gpio-0:
gpio-0 (GPIO Key Power ) in lo
gpio-10 (? ) out hi
gpio-12 (HP jack detect ) in lo
gpio-22 (? ) out hi
gpio-23 (sysfs ) out hi
gpio-24 (sysfs ) out lo
gpio-26 (sysfs ) out lo
gpio-27 (sysfs ) out lo
GPIOs 32-63, gpio-1:
gpio-56 (mt9m111 #OE ) in hi
GPIOs 64-95, gpio-2:
gpio-77 (sysfs ) out hi
gpio-82 (? ) out hi
gpio-83 (sysfs ) out hi
gpio-86 (sysfs ) out hi
gpio-88 (sysfs ) out hi
gpio-90 (sysfs ) out hi
gpio-93 (Volume Up Key ) in lo
gpio-94 (Volume Down Key ) in lo
GPIOs 96-120, gpio-3:
gpio-97 (? ) out lo
gpio-98 (? ) out hi
gpio-106 (sysfs ) out lo
gpio-107 (sysfs ) out lo
gpio-114 (sysfs ) out hi
gpio-115 (? ) out hi
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