RE: [PATCH V2 4/5] dt-bindings: serial: Convert MXS auart to json-schema

[Anson Huang <anson.huang@nxp.com>]

Hi, Rob


> Subject: Re: [PATCH V2 4/5] dt-bindings: serial: Convert MXS auart to
> json-schema
> 
> On Wed, Aug 12, 2020 at 04:51:23PM +0800, Anson Huang wrote:
> > Convert the MXS auart binding to DT schema format using json-schema.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> > ---
> > changes since V1:
> > 	- update examples to align with i.MX23/i.MX28 clock bindings;
> > 	- add minItem to clocks/clock-names property as i.MX23/i.MX28 have
> optional clocks
> > 	  property with one item.
> > ---
> >  .../devicetree/bindings/serial/fsl-mxs-auart.txt   | 53 -------------
> >  .../devicetree/bindings/serial/fsl-mxs-auart.yaml  | 91
> > ++++++++++++++++++++++
> >  2 files changed, 91 insertions(+), 53 deletions(-)  delete mode
> > 100644 Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> >  create mode 100644
> > Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> > b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> > deleted file mode 100644
> > index 5c96d41..0000000
> > --- a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.txt
> > +++ /dev/null
> > @@ -1,53 +0,0 @@
> > -* Freescale MXS Application UART (AUART)
> > -
> > -Required properties for all SoCs:
> > -- compatible : Should be one of fallowing variants:
> > -	"fsl,imx23-auart" - Freescale i.MX23
> > -	"fsl,imx28-auart" - Freescale i.MX28
> > -	"alphascale,asm9260-auart" - Alphascale ASM9260
> > -- reg : Address and length of the register set for the device
> > -- interrupts : Should contain the auart interrupt numbers
> > -- dmas: DMA specifier, consisting of a phandle to DMA controller node
> > -  and AUART DMA channel ID.
> > -  Refer to dma.txt and fsl-mxs-dma.txt for details.
> > -- dma-names: "rx" for RX channel, "tx" for TX channel.
> > -
> > -Required properties for "alphascale,asm9260-auart":
> > -- clocks : the clocks feeding the watchdog timer. See
> > clock-bindings.txt
> > -- clock-names : should be set to
> > -	"mod" - source for tick counter.
> > -	"ahb" - ahb gate.
> > -
> > -Optional properties:
> > -- uart-has-rtscts : Indicate the UART has RTS and CTS lines
> > -  for hardware flow control,
> > -	it also means you enable the DMA support for this UART.
> > -- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for
> > RTS/CTS/DTR/DSR/RI/DCD
> > -  line respectively. It will use specified PIO instead of the
> > peripheral
> > -  function pin for the USART feature.
> > -  If unsure, don't specify this property.
> > -
> > -Example:
> > -auart0: serial@8006a000 {
> > -	compatible = "fsl,imx28-auart", "fsl,imx23-auart";
> > -	reg = <0x8006a000 0x2000>;
> > -	interrupts = <112>;
> > -	dmas = <&dma_apbx 8>, <&dma_apbx 9>;
> > -	dma-names = "rx", "tx";
> > -	cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
> > -	dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
> > -	dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
> > -};
> > -
> > -Note: Each auart port should have an alias correctly numbered in "aliases"
> > -node.
> > -
> > -Example:
> > -
> > -aliases {
> > -	serial0 = &auart0;
> > -	serial1 = &auart1;
> > -	serial2 = &auart2;
> > -	serial3 = &auart3;
> > -	serial4 = &auart4;
> > -};
> > diff --git
> > a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
> > b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
> > new file mode 100644
> > index 0000000..5c4fa75
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
> > @@ -0,0 +1,91 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fschemas%2Fserial%2Ffsl-mxs-auart.yaml%23&amp;data=02%7
> C0
> >
> +1%7CAnson.Huang%40nxp.com%7Cab0ecefb1f8a405a777608d8431ceba7%
> 7C686ea1
> >
> +d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637333138774276608&amp;
> sdata=0eW
> > +q1Lnvv2PJcAlS2IThb6DYy9x55jopNRcz%2Fa5YGgc%3D&amp;reserved=0
> > +$schema:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=02%7C01%7CAns
> on.Hua
> >
> +ng%40nxp.com%7Cab0ecefb1f8a405a777608d8431ceba7%7C686ea1d3bc2
> b4c6fa92
> >
> +cd99c5c301635%7C0%7C0%7C637333138774286606&amp;sdata=77AsG1n
> Q%2BFl9x0
> > +XStFm6xHXXAO4MNVrkLgezkHni57Y%3D&amp;reserved=0
> > +
> > +title: Freescale MXS Application UART (AUART)
> > +
> > +maintainers:
> > +  - Kumar Gala <galak@codeaurora.org>
> 
> Why is Kumar maintainer and that's a really old email address?

I finally found the fist patch of this binding doc, Kumar ONLY did the moving of the file to different
folder, I will update the mainatainer to Fabio in V3.

commit 1ea6607d4cdc917987e7e6cfaafc4a630d97a297
Author: Fabio Estevam <fabio.estevam@freescale.com>
Date:   Mon Jun 18 10:06:09 2012 -0300

    serial: mxs-auart: Allow device tree probing

    Allow device tree probing.

    Cc: Grant Likely <grant.likely@secretlab.ca>
    Cc: Rob Herring <rob.herring@calxeda.com>
    Cc: Alan Cox <alan@linux.intel.com>
    Cc: <linux-serial@vger.kernel.org>
    Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
    Signed-off-by: Subodh Nijsure <snijsure@grid-net.com>
    Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Thanks,
Anson