&pio {
uart2_pins_ctsrts: uart2-ctsrts {
pins = "PA#", "PA#"; // replace # with number of the CTS/DTS pin
function = "uart2";
};
};
Where are you referencing those strings from (both "PA#" and "uart2")?
Tried looking at both the pinctrl-bindings as well as sunxi pinctrl.
*
http://elixir.free-electrons.com/linux/v4.13/source/Documentation/devicetree/bindings/pinctrl/allwinner,sunxi-pinctrl.txt
*
http://elixir.free-electrons.com/linux/v4.13/source/Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
Also I seem to have inherited device tree with:
allwinner,function:
Am I interpreting this correctly that this has been deprecated for the
generic
pinctrl bindings and should be renamed?
On Thursday, November 16, 2017 at 8:38:40 PM UTC+1, Ondřej Jirman wrote:
>
> Hi,
>
> for flow control, you need to configure relevant flow control pins for
> uart2 function too too. Perhaps DTS and CTS?
>
> Add:
>
> &pio {
>
> uart2_pins_ctsrts: uart2-ctsrts {
> pins = "PA#", "PA#"; // replace # with number of the CTS/DTS pin
> function = "uart2";
>
> };
>
> You can check pinctrl code for H3 for what functions are available on what
> pins.
>
> And then modify:
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins &uart2_pins_ctsrts>;
> status = "okay";
> };
>
>
> This will configure pins for both listed function definitions.
>
> regards,
> o.
>
> [email protected] <javascript:> píše v Čt 16. 11. 2017 v 08:34 -0800:
>
> Hi,
> I'm trying to enable uart2 for a connection with bluetooth on a H3 based
> board <http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO>
> It lays on a custom pcb connected through the exposed headers.
>
> For that we have a custom device tree:
>
> https://github.com/getsenic/senic-os-linux/blob/senic/4.13/arch/arm/boot/dts/sun8i-h3-senic-hub.dts
> modified just to add some extra switches.
>
> I'm trying to now enable the uart2 with flow control which is needed for
> connection the H3 with
> a bluetooth module.
>
> My first try was to extend the device tree with what is working for the
> debug uart:
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins>;
> status = "okay";
> };
>
> however that seems to end up with errors:
>
> [ 0.849626] dw-apb-uart 1c28800.serial: Error applying setting, reverse
> things back
> [ 0.857292] dw-apb-uart: probe of 1c28800.serial failed with error -22
>
> Searching for uart2 in the exteneded device tree results in:
>
> uart2: serial@01c28800 {
> compatible = "snps,dw-apb-uart";
> reg = <0x01c28800 0x400>;
> interrupts = <0 2 4>;
> reg-shift = <2>;
> reg-io-width = <4>;
> clocks = <&ccu 64>;
> resets = <&ccu 51>;
> dmas = <&dma 8>, <&dma 8>;
> dma-names = "rx", "tx";
> status = "disabled";
> };
>
> pio: pinctrl@01c20800 {
> reg = <0x01c20800 0x400>;
> interrupts = <0 11 4>,
> <0 17 4>;
> clocks = <&ccu 54>, <&osc24M>, <&osc32k>;
> clock-names = "apb", "hosc", "losc";
> gpio-controller;
> #gpio-cells = <3>;
> interrupt-controller;
> #interrupt-cells = <3>;
>
> .... OTHER ENTRIES
>
> uart2_pins: uart2 {
> pins = "PA0", "PA1";
> function = "uart2";
> };
> };
>
> and finally the one that I've entered in the device
> tree we introduced:
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins>;
> status = "okay";
> };
>
> Any directions on how to proceed next?
>
> Be Well,
> Alan
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "linux-sunxi" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected] <javascript:>.
> For more options, visit https://groups.google.com/d/optout.
>
>
On Thursday, November 16, 2017 at 8:38:40 PM UTC+1, Ondřej Jirman wrote:
>
> Hi,
>
> for flow control, you need to configure relevant flow control pins for
> uart2 function too too. Perhaps DTS and CTS?
>
> Add:
>
> &pio {
>
> uart2_pins_ctsrts: uart2-ctsrts {
> pins = "PA#", "PA#"; // replace # with number of the CTS/DTS pin
> function = "uart2";
>
> };
>
> You can check pinctrl code for H3 for what functions are available on what
> pins.
>
> And then modify:
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins &uart2_pins_ctsrts>;
> status = "okay";
> };
>
>
> This will configure pins for both listed function definitions.
>
> regards,
> o.
>
> [email protected] <javascript:> píše v Čt 16. 11. 2017 v 08:34 -0800:
>
> Hi,
> I'm trying to enable uart2 for a connection with bluetooth on a H3 based
> board <http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO>
> It lays on a custom pcb connected through the exposed headers.
>
> For that we have a custom device tree:
>
> https://github.com/getsenic/senic-os-linux/blob/senic/4.13/arch/arm/boot/dts/sun8i-h3-senic-hub.dts
> modified just to add some extra switches.
>
> I'm trying to now enable the uart2 with flow control which is needed for
> connection the H3 with
> a bluetooth module.
>
> My first try was to extend the device tree with what is working for the
> debug uart:
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins>;
> status = "okay";
> };
>
> however that seems to end up with errors:
>
> [ 0.849626] dw-apb-uart 1c28800.serial: Error applying setting, reverse
> things back
> [ 0.857292] dw-apb-uart: probe of 1c28800.serial failed with error -22
>
> Searching for uart2 in the exteneded device tree results in:
>
> uart2: serial@01c28800 {
> compatible = "snps,dw-apb-uart";
> reg = <0x01c28800 0x400>;
> interrupts = <0 2 4>;
> reg-shift = <2>;
> reg-io-width = <4>;
> clocks = <&ccu 64>;
> resets = <&ccu 51>;
> dmas = <&dma 8>, <&dma 8>;
> dma-names = "rx", "tx";
> status = "disabled";
> };
>
> pio: pinctrl@01c20800 {
> reg = <0x01c20800 0x400>;
> interrupts = <0 11 4>,
> <0 17 4>;
> clocks = <&ccu 54>, <&osc24M>, <&osc32k>;
> clock-names = "apb", "hosc", "losc";
> gpio-controller;
> #gpio-cells = <3>;
> interrupt-controller;
> #interrupt-cells = <3>;
>
> .... OTHER ENTRIES
>
> uart2_pins: uart2 {
> pins = "PA0", "PA1";
> function = "uart2";
> };
> };
>
> and finally the one that I've entered in the device
> tree we introduced:
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins>;
> status = "okay";
> };
>
> Any directions on how to proceed next?
>
> Be Well,
> Alan
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "linux-sunxi" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected] <javascript:>.
> For more options, visit https://groups.google.com/d/optout.
>
>
--
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