From: Brad Larson <brad@pensando.io>
To: Rob Herring <robh@kernel.org>
Cc: Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mmc <linux-mmc@vger.kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Al Cooper <alcooperx@gmail.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
blarson@amd.com, Catalin Marinas <catalin.marinas@arm.com>,
Gabriel Somlo <gsomlo@gmail.com>,
gerg@linux-m68k.org, Krzysztof Kozlowski <krzk@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Lee Jones <lee.jones@linaro.org>, Mark Brown <broonie@kernel.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Pratyush Yadav <p.yadav@ti.com>,
Randy Dunlap <rdunlap@infradead.org>,
samuel@sholland.org, Serge Semin <fancer.lancer@gmail.com>,
suravee.suthikulpanit@amd.com,
Tom Lendacky <thomas.lendacky@amd.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Will Deacon <will@kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>
Subject: Re: [PATCH v5 06/15] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando Elba System Resource chip
Date: Sun, 3 Jul 2022 16:30:26 -0700 [thread overview]
Message-ID: <CAK9rFnzyKz3BHfMp8ENu+BxY4xyp3iNvnMW_M2KTPyPrfL_RNg@mail.gmail.com> (raw)
In-Reply-To: <20220614213036.GA2660642-robh@kernel.org>
Hi Rob,
On Tue, Jun 14, 2022 at 2:30 PM Rob Herring <robh@kernel.org> wrote:
>
> On Mon, Jun 13, 2022 at 12:56:49PM -0700, Brad Larson wrote:
> > From: Brad Larson <blarson@amd.com>
> >
> > Add support for the AMD Pensando Elba SoC System Resource chip
> > using the SPI interface. The Elba SR is a Multi-function Device
> > supporting device register access using CS0, smbus interface for
> > FRU and board peripherals using CS1, dual Lattice I2C masters for
> > transceiver management using CS2, and CS3 for flash access.
> >
> > Signed-off-by: Brad Larson <blarson@amd.com>
> > ---
> > .../bindings/mfd/amd,pensando-elbasr.yaml | 93 +++++++++++++++++++
> > 1 file changed, 93 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml b/Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml
> > new file mode 100644
> > index 000000000000..13356800b1cf
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml
> > @@ -0,0 +1,93 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/mfd/amd,pensando-elbasr.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: AMD Pensando Elba SoC Resource Controller bindings
> ...
> > +patternProperties:
> > + '^reset-controller@[a-f0-9]+$':
> > + $ref: ../reset/amd,pensando-elbasr-reset.yaml
>
> /schemas/reset/...
Changed it to
$ref: /schemas/reset/amd,pensando-elbasr-reset.yaml
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/reset/amd,pensando-elba-reset.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > + spi0 {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + num-cs = <4>;
> > +
> > + spi@0 {
> > + compatible = "amd,pensando-elbasr", "simple-mfd";
> > + reg = <0>;
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + spi-max-frequency = <12000000>;
> > +
> > + rstc: reset-controller@0 {
>
> Only one child does not make a MFD...
Looking over the approaches for other SoCs with an external
required controller (cpld, fpga) this appeared to be an
acceptable choice. This device is accessed by several
different utilities/programs via /dev/pensr0.x, CS0 registers
for a variety of control/status, CS1 designware i2c master/slave,
CS2 lattice dual i2c masters, and CS3 for flash.
> > + compatible = "amd,pensando-elbasr-reset";
> > + reg = <0>;
> > + #reset-cells = <1>;
> > + };
> > + };
> > +
> > + spi@1 {
> > + compatible = "amd,pensando-elbasr", "simple-mfd";
> > + reg = <1>;
> > + spi-max-frequency = <12000000>;
>
> 'simple-mfd' implies there are child nodes, but you have none. Is this
> complete?
This function is a designware i2c master/slave for board peripheral
access. Removed simple-mfd.
> > + };
> > +
> > + spi@2 {
> > + compatible = "amd,pensando-elbasr", "simple-mfd";
> > + reg = <2>;
> > + spi-max-frequency = <12000000>;
> > + interrupt-parent = <&porta>;
> > + interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
>
> This one has interrupt but the others don't?
Yes, this function is a Lattice dual I2C master for transceiver
management. The spi to i2c driver is not included in this patch set for
essential Elba SoC support. Removed simple-mfd.
Regards,
Brad
next prev parent reply other threads:[~2022-07-03 23:30 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-13 19:56 [PATCH v5 00/15] Support AMD Pensando Elba SoC Brad Larson
2022-06-13 19:56 ` [PATCH v5 01/15] dt-bindings: arm: add AMD Pensando boards Brad Larson
2022-06-14 21:16 ` Rob Herring
2022-06-20 12:48 ` Krzysztof Kozlowski
2022-06-13 19:56 ` [PATCH v5 02/15] dt-bindings: mmc: cdns: Add AMD Pensando Elba SoC binding Brad Larson
2022-06-14 21:22 ` Rob Herring
2022-07-03 23:08 ` Brad Larson
2022-06-20 12:50 ` Krzysztof Kozlowski
2022-07-03 23:11 ` Brad Larson
2022-06-13 19:56 ` [PATCH v5 03/15] dt-bindings: spi: cdns: Add compatible for AMD Pensando Elba SoC Brad Larson
2022-06-14 21:23 ` Rob Herring
2022-06-20 12:51 ` Krzysztof Kozlowski
2022-06-13 19:56 ` [PATCH v5 04/15] dt-bindings: spi: dw: Add AMD Pensando Elba SoC SPI Controller bindings Brad Larson
2022-06-14 21:23 ` Rob Herring
2022-06-20 19:30 ` Serge Semin
2022-06-20 19:46 ` Krzysztof Kozlowski
2022-06-20 20:04 ` Serge Semin
2022-06-21 7:00 ` Krzysztof Kozlowski
2022-06-21 10:11 ` Serge Semin
2022-07-03 23:58 ` Brad Larson
2022-07-04 13:18 ` Serge Semin
2022-06-13 19:56 ` [PATCH v5 05/15] dt-bindings: mfd: syscon: Add amd,pensando-elba-syscon compatible Brad Larson
2022-06-14 21:24 ` Rob Herring
2022-06-13 19:56 ` [PATCH v5 06/15] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando Elba System Resource chip Brad Larson
2022-06-14 21:30 ` Rob Herring
2022-07-03 23:30 ` Brad Larson [this message]
2022-06-20 12:56 ` Krzysztof Kozlowski
2022-07-03 23:41 ` Brad Larson
2022-07-05 9:46 ` Krzysztof Kozlowski
2022-06-13 19:56 ` [PATCH v5 07/15] dt-bindings: reset: amd,pensando-elbasr-reset: Add AMD Pensando SR Reset Controller bindings Brad Larson
2022-06-14 21:32 ` Rob Herring
2022-07-03 23:34 ` Brad Larson
2022-06-20 13:00 ` Krzysztof Kozlowski
2022-07-03 23:50 ` Brad Larson
2022-07-04 6:41 ` Krzysztof Kozlowski
2022-07-05 18:28 ` Brad Larson
2022-07-05 18:30 ` Krzysztof Kozlowski
2022-06-13 19:56 ` [PATCH v5 08/15] MAINTAINERS: Add entry for AMD PENSANDO Brad Larson
2022-06-13 19:56 ` [PATCH v5 09/15] arm64: Add config for AMD Pensando SoC platforms Brad Larson
2022-06-13 19:56 ` [PATCH v5 10/15] arm64: dts: Add AMD Pensando Elba SoC support Brad Larson
2022-06-14 22:44 ` Krzysztof Kozlowski
2022-07-03 23:15 ` Brad Larson
2022-06-13 19:56 ` [PATCH v5 11/15] spi: cadence-quadspi: Add compatible for AMD Pensando Elba SoC Brad Larson
2022-06-14 8:48 ` Pratyush Yadav
2022-07-03 21:05 ` Brad Larson
2022-06-14 12:01 ` Mark Brown
2022-07-03 21:09 ` Brad Larson
2022-06-13 19:56 ` [PATCH v5 12/15] spi: dw: Add support " Brad Larson
2022-06-14 11:10 ` Andy Shevchenko
2022-07-03 21:14 ` Brad Larson
2022-06-13 19:56 ` [PATCH v5 13/15] mmc: sdhci-cadence: Add AMD Pensando Elba SoC support Brad Larson
2022-06-14 11:19 ` Andy Shevchenko
2022-07-03 21:42 ` Brad Larson
2022-06-13 19:56 ` [PATCH v5 14/15] mfd: pensando-elbasr: Add AMD Pensando Elba System Resource chip Brad Larson
2022-06-14 11:42 ` Andy Shevchenko
2022-07-03 21:56 ` Brad Larson
2022-06-13 19:56 ` [PATCH v5 15/15] reset: elbasr: Add AMD Pensando Elba SR Reset Controller Brad Larson
2022-06-14 11:46 ` Andy Shevchenko
2022-07-03 22:06 ` Brad Larson
2022-06-14 14:49 ` Philipp Zabel
2022-07-03 22:03 ` Brad Larson
2022-06-14 21:34 ` Rob Herring
2022-07-03 23:24 ` Brad Larson
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