Hi, On Mon, Oct 09, 2017 at 11:39:02AM +0200, Lars Poeschel wrote: > On Sun, Oct 8, 2017 at 01:58:52 CEST Linus Walleij wrote: > > CCing-in Sebastian Reichel who did the move to pinctrl and pinctrl support as > well. > > > On Thu, Oct 5, 2017 at 9:50 AM, Lars Poeschel <[email protected]> wrote: > > > The mcp23s08 driver was moved from gpio to pinctrl. This moves it's > > > devicetree binding doc as well. So driver and binding doc are in sync > > > again. > > > > > > Signed-off-by: Lars Poeschel <[email protected]> > > > > Are there no new references to the generic pin control binding > > needed as well? > > Well, yes there is one: As far as I can see it supports the bias-pull-up > property. > My first intention was to have the doc as we have it in the right place, but > you are right: It needs an update as well. I can do this, but Sebastian, > please keep an eye on that. > > As there are already patches depending on this patch (https://marc.info/? > l=linux-gpio&m=150726650325394&w=4) I would suggest, that you pull in this > patch as is and I do the little update on the doc as a seperate patch.
Yes, the driver supports being used as pin controller with the
"bias-pull-up;" property now. For example I use this with a RPi
to enable pull-ups for all pins:
gpio21: gpio@21 {
compatible = "microchip,mcp23017";
gpio-controller;
#gpio-cells = <0x2>;
reg = <0x21>;
interrupt-parent = <&socgpio>;
interrupts = <0x17 0x8>;
interrupt-names = "mcp23017@21 irq";
interrupt-controller;
#interrupt-cells = <0x2>;
microchip,irq-mirror;
pinctrl-names = "default";
pinctrl-0 = <&i2cgpio0irq &gpio21pullups>;
gpio21pullups: pinmux {
pins = "gpio0", "gpio1", "gpio2", "gpio3",
"gpio4", "gpio5", "gpio6", "gpio7",
"gpio8", "gpio9", "gpio10", "gpio11",
"gpio12", "gpio13", "gpio14", "gpio15";
bias-pull-up;
};
};
-- Sebastian
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