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Message-ID: <20210304080355.cc37g7jagswro3dg@mobilestation>
Date: Thu, 4 Mar 2021 11:03:55 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: Brad Larson <brad@...sando.io>
Cc: linux-arm-kernel@...ts.infradead.org, arnd@...db.de,
linus.walleij@...aro.org, bgolaszewski@...libre.com,
broonie@...nel.org, adrian.hunter@...el.com,
ulf.hansson@...aro.org, olof@...om.net, linux-gpio@...r.kernel.org,
linux-spi@...r.kernel.org, linux-mmc@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/8] arm64: dts: Add Pensando Elba SoC support
On Wed, Mar 03, 2021 at 07:41:40PM -0800, Brad Larson wrote:
> Add Pensando common and Elba SoC specific device nodes
> and corresponding binding documentation.
This also needs to be split up into sub-patches seeing these are
unrelated changes like device bindings update, new platform DT file.
Note text-based bindings are deprecated in favor of the DT schemas.
Also note dts needs to pass dtbs_check validation. So all new HW/DT
nodes need to be reflected in the DT-schemas. See [1] for details.
[1] Documentation/devicetree/writing-schema.rst
>
> Signed-off-by: Brad Larson <brad@...sando.io>
> ---
> .../bindings/gpio/pensando,elba-spics.txt | 24 ++
> .../devicetree/bindings/mmc/cdns,sdhci.yaml | 2 +-
> .../bindings/spi/cadence-quadspi.txt | 1 +
> .../devicetree/bindings/vendor-prefixes.yaml | 2 +
> arch/arm64/boot/dts/Makefile | 1 +
> arch/arm64/boot/dts/pensando/Makefile | 6 +
> arch/arm64/boot/dts/pensando/elba-16core.dtsi | 171 ++++++++++
> .../boot/dts/pensando/elba-asic-common.dtsi | 113 +++++++
> arch/arm64/boot/dts/pensando/elba-asic.dts | 8 +
> .../boot/dts/pensando/elba-flash-parts.dtsi | 80 +++++
> arch/arm64/boot/dts/pensando/elba.dtsi | 310 ++++++++++++++++++
> 11 files changed, 717 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/gpio/pensando,elba-spics.txt
> create mode 100644 arch/arm64/boot/dts/pensando/Makefile
> create mode 100644 arch/arm64/boot/dts/pensando/elba-16core.dtsi
> create mode 100644 arch/arm64/boot/dts/pensando/elba-asic-common.dtsi
> create mode 100644 arch/arm64/boot/dts/pensando/elba-asic.dts
> create mode 100644 arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi
> create mode 100644 arch/arm64/boot/dts/pensando/elba.dtsi
>
> diff --git a/Documentation/devicetree/bindings/gpio/pensando,elba-spics.txt b/Documentation/devicetree/bindings/gpio/pensando,elba-spics.txt
> new file mode 100644
> index 000000000000..30f5f3275238
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/pensando,elba-spics.txt
> @@ -0,0 +1,24 @@
> +Pensando Elba SPI Chip Select Driver
> +
> +The Pensando Elba ASIC provides four SPI bus chip selects
> +
> +Required properties:
> +- compatible: Should be "pensando,elba-spics"
> +- reg: Address range of spics controller
> +- gpio-controller: Marks the device node as gpio controller
> +- #gpio-cells: Must be 2
> +
> +Example:
> +-------
> +spics: spics@...c2468 {
> + compatible = "pensando,elba-spics";
> + reg = <0x0 0x307c2468 0x0 0x4>;
> + gpio-controller;
> + #gpio-cells = <2>;
> +};
> +
> +&spi0 {
> + num-cs = <4>;
> + cs-gpios = <&spics 0 0>, <&spics 1 0>, <&porta 1 0>, <&porta 7 0>;
> + ...
> +}
> diff --git a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> index af7442f73881..645ae696ba24 100644
> --- a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> +++ b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
> @@ -122,7 +122,7 @@ unevaluatedProperties: false
> examples:
> - |
> emmc: mmc@...00000 {
> - compatible = "socionext,uniphier-sd4hc", "cdns,sd4hc";
> + compatible = "socionext,uniphier-sd4hc", "cdns,sd4hc", "pensando,elba-emmc";
Alas it's not enough. New HW compatible strings shall be defined in the
binding schema.
> reg = <0x5a000000 0x400>;
> interrupts = <0 78 4>;
> clocks = <&clk 4>;
> diff --git a/Documentation/devicetree/bindings/spi/cadence-quadspi.txt b/Documentation/devicetree/bindings/spi/cadence-quadspi.txt
> index 8ace832a2d80..dbb346b2b1d7 100644
> --- a/Documentation/devicetree/bindings/spi/cadence-quadspi.txt
> +++ b/Documentation/devicetree/bindings/spi/cadence-quadspi.txt
> @@ -6,6 +6,7 @@ Required properties:
> For TI 66AK2G SoC - "ti,k2g-qspi", "cdns,qspi-nor".
> For TI AM654 SoC - "ti,am654-ospi", "cdns,qspi-nor".
> For Intel LGM SoC - "intel,lgm-qspi", "cdns,qspi-nor".
> + For Pensando SoC - "pensando,cdns-qspi".
What about converting this file to DT-schema and adding new HW
bindings in there?
> - reg : Contains two entries, each of which is a tuple consisting of a
> physical address and length. The first entry is the address and
> length of the controller register set. The second entry is the
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index f6064d84a424..9a21d780c5e1 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -850,6 +850,8 @@ patternProperties:
> description: Parallax Inc.
> "^pda,.*":
> description: Precision Design Associates, Inc.
> + "^pensando,.*":
> + description: Pensando Systems Inc.
> "^pericom,.*":
> description: Pericom Technology Inc.
> "^pervasive,.*":
> diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
> index f1173cd93594..c85db0a097fe 100644
> --- a/arch/arm64/boot/dts/Makefile
> +++ b/arch/arm64/boot/dts/Makefile
> @@ -19,6 +19,7 @@ subdir-y += marvell
> subdir-y += mediatek
> subdir-y += microchip
> subdir-y += nvidia
> +subdir-y += pensando
> subdir-y += qcom
> subdir-y += realtek
> subdir-y += renesas
> diff --git a/arch/arm64/boot/dts/pensando/Makefile b/arch/arm64/boot/dts/pensando/Makefile
> new file mode 100644
> index 000000000000..0c2c0961e64a
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_ARCH_PENSANDO_ELBA_SOC) += elba-asic.dtb
> +
> +always-y := $(dtb-y)
> +subdir-y := $(dts-dirs)
> +clean-files := *.dtb
> diff --git a/arch/arm64/boot/dts/pensando/elba-16core.dtsi b/arch/arm64/boot/dts/pensando/elba-16core.dtsi
> new file mode 100644
> index 000000000000..b0386864cfec
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-16core.dtsi
> @@ -0,0 +1,171 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/ {
> + cpus {
> + #address-cells = <2>;
> + #size-cells = <0>;
> +
> + cpu-map {
> + cluster0 {
> + core0 { cpu = <&cpu0>; };
> + core1 { cpu = <&cpu1>; };
> + core2 { cpu = <&cpu2>; };
> + core3 { cpu = <&cpu3>; };
> + };
> + cluster1 {
> + core0 { cpu = <&cpu4>; };
> + core1 { cpu = <&cpu5>; };
> + core2 { cpu = <&cpu6>; };
> + core3 { cpu = <&cpu7>; };
> + };
> + cluster2 {
> + core0 { cpu = <&cpu8>; };
> + core1 { cpu = <&cpu9>; };
> + core2 { cpu = <&cpu10>; };
> + core3 { cpu = <&cpu11>; };
> + };
> + cluster3 {
> + core0 { cpu = <&cpu12>; };
> + core1 { cpu = <&cpu13>; };
> + core2 { cpu = <&cpu14>; };
> + core3 { cpu = <&cpu15>; };
> + };
> + };
> +
> + // CLUSTER 0
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x0>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_0>;
> + };
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x1>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_0>;
> + };
> + cpu2: cpu@2 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x2>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_0>;
> + };
> + cpu3: cpu@3 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x3>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_0>;
> + };
> +
> + l2_0: l2-cache0 {
> + compatible = "cache";
> + };
> +
> + // CLUSTER 1
> + cpu4: cpu@100 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x100>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_1>;
> + };
> + cpu5: cpu@101 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x101>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_1>;
> + };
> + cpu6: cpu@102 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x102>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_1>;
> + };
> + cpu7: cpu@103 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x103>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_1>;
> + };
> +
> + l2_1: l2-cache1 {
> + compatible = "cache";
> + };
> +
> + // CLUSTER 2
> + cpu8: cpu@200 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x200>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_2>;
> + };
> + cpu9: cpu@201 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x201>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_2>;
> + };
> + cpu10: cpu@202 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x202>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_2>;
> + };
> + cpu11: cpu@203 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x203>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_2>;
> + };
> +
> + l2_2: l2-cache2 {
> + compatible = "cache";
> + };
> +
> + // CLUSTER 3
> + cpu12: cpu@300 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x300>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_3>;
> + };
> + cpu13: cpu@301 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x301>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_3>;
> + };
> + cpu14: cpu@302 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x302>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_3>;
> + };
> + cpu15: cpu@303 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a72", "arm,armv8";
> + reg = <0 0x303>;
> + enable-method = "spin-table";
> + next-level-cache = <&l2_3>;
> + };
> +
> + l2_3: l2-cache3 {
> + compatible = "cache";
> + };
> + };
> +};
> diff --git a/arch/arm64/boot/dts/pensando/elba-asic-common.dtsi b/arch/arm64/boot/dts/pensando/elba-asic-common.dtsi
> new file mode 100644
> index 000000000000..9623df208131
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-asic-common.dtsi
> @@ -0,0 +1,113 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/ {
> + model = "Elba ASIC Board";
> +
> + aliases {
> + serial0 = &uart0;
> + spi0 = &spi0;
> + spi1 = &qspi;
> + };
> +
> + chosen {
> + stdout-path = "serial0:19200n8";
Baudrate of 19200? So sad.(
> + };
> +};
> +
> +&ahb_clk {
> + clock-frequency = <400000000>;
> +};
> +
> +&emmc_clk {
> + clock-frequency = <200000000>;
> +};
> +
> +&flash_clk {
> + clock-frequency = <400000000>;
> +};
> +
> +&ref_clk {
> + clock-frequency = <156250000>;
> +};
> +
> +&qspi {
> + status = "okay";
> + flash0: mt25q@0 {
> + compatible = "jdec,spi-nor";
> + reg = <0>;
> + spi-max-frequency = <40000000>;
> + spi-rx-bus-width = <2>;
> + m25p,fast-read;
> + cdns,read-delay = <0>;
> + cdns,tshsl-ns = <0>;
> + cdns,tsd2d-ns = <0>;
> + cdns,tchsh-ns = <0>;
> + cdns,tslch-ns = <0>;
> + };
> +};
> +
> +&gpio0 {
> + status = "ok";
> +};
> +
> +&emmc {
> + bus-width = <8>;
> + status = "ok";
> +};
> +
> +&wdt0 {
> + status = "okay";
> +};
> +
> +&i2c0 {
> + clock-frequency = <100000>;
> + status = "okay";
> + tmp451@4c {
> + compatible = "ti,tmp451";
> + reg = <0x4c>;
> + };
> + tps53659@62 {
> + compatible = "ti,tps53659";
> + reg = <0x62>;
> + };
> + pcf85263@51 {
> + compatible = "nxp,pcf85263";
> + reg = <0x51>;
> + };
> +};
> +
> +&spi0 {
> + num-cs = <4>;
> + cs-gpios = <&spics 0 0>, <&spics 1 0>, <&porta 1 0>, <&porta 7 0>;
Oh, you've got four peripheral SPI devices connected with only two native CS
available. Hmm, then I don't really know a better way, but just to forget about
the native DW APB CS functionality and activate the direct driving of
all the CS-pins at the moment of the DW APB SPI controller probe
procedure. Then indeed you'll need a custom CS function defined in the DW APB
SPI driver to handle that.
> + status = "okay";
> + spi@0 {
> + compatible = "pensando,cpld";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + spi-max-frequency = <12000000>;
> + reg = <0>;
> + };
> + spi@1 {
> + compatible = "pensando,cpld";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + spi-max-frequency = <12000000>;
> + reg = <1>;
> + };
> + spi@2 {
> + compatible = "pensando,cpld-rd1173";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + spi-max-frequency = <12000000>;
> + reg = <2>;
> + interrupt-parent = <&porta>;
> + interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> + };
> + spi@3 {
> + compatible = "pensando,cpld";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + spi-max-frequency = <12000000>;
> + reg = <3>;
> + };
> +};
> diff --git a/arch/arm64/boot/dts/pensando/elba-asic.dts b/arch/arm64/boot/dts/pensando/elba-asic.dts
> new file mode 100644
> index 000000000000..411c48457006
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-asic.dts
> @@ -0,0 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/dts-v1/;
> +
> +#include "elba.dtsi"
> +#include "elba-16core.dtsi"
> +#include "elba-asic-common.dtsi"
> +#include "elba-flash-parts.dtsi"
> diff --git a/arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi b/arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi
> new file mode 100644
> index 000000000000..1983de1a8403
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba-flash-parts.dtsi
> @@ -0,0 +1,80 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +&flash0 {
> + partitions {
> + compatible = "fixed-partitions";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + partition@0 {
> + label = "flash";
> + reg = <0x00010000 0x0fff0000>;
> + };
> + partition@...00 {
> + label = "golduenv";
> + reg = <0x000f0000 0x00010000>;
> + };
> + partition@...000 {
> + label = "boot0";
> + reg = <0x00100000 0x00080000>;
> + };
> + partition@...000 {
> + label = "golduboot";
> + reg = <0x00180000 0x00200000>;
> + };
> + partition@...000 {
> + label = "goldfw";
> + reg = <0x00400000 0x03c00000>;
> + };
> + partition@...0000 {
> + label = "fwmap";
> + reg = <0x04010000 0x00020000>;
> + };
> + partition@...0000 {
> + label = "fwsel";
> + reg = <0x04030000 0x00020000>;
> + };
> + partition@...0000 {
> + label = "bootlog";
> + reg = <0x04090000 0x00020000>;
> + };
> + partition@...0000 {
> + label = "panicbuf";
> + reg = <0x040b0000 0x00020000>;
> + };
> + partition@...0000 {
> + label = "uservars";
> + reg = <0x040d0000 0x00020000>;
> + };
> + partition@...0000 {
> + label = "uboota";
> + reg = <0x04200000 0x00400000>;
> + };
> + partition@...0000 {
> + label = "ubootb";
> + reg = <0x04600000 0x00400000>;
> + };
> + partition@...0000 {
> + label = "mainfwa";
> + reg = <0x04a00000 0x01000000>;
> + };
> + partition@...0000 {
> + label = "mainfwb";
> + reg = <0x05a00000 0x01000000>;
> + };
> + partition@...0000 {
> + label = "diagfw";
> + reg = <0x08000000 0x07fe0000>;
> + };
> + partition@...0000 {
> + label = "ubootenv";
> + reg = <0x0ffe0000 0x00010000>;
> + };
> + };
> +};
> +
> +&soc {
> + panicdump@...b0000 {
> + compatible = "pensando,capri-crash";
> + reg = <0x0 0x740b0000 0x0 0x00020000>;
> + };
> +};
> diff --git a/arch/arm64/boot/dts/pensando/elba.dtsi b/arch/arm64/boot/dts/pensando/elba.dtsi
> new file mode 100644
> index 000000000000..72245e279483
> --- /dev/null
> +++ b/arch/arm64/boot/dts/pensando/elba.dtsi
> @@ -0,0 +1,310 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2019-2021, Pensando Systems Inc.
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include "dt-bindings/interrupt-controller/arm-gic.h"
> +
> +/ {
> + compatible = "pensando,elba";
> +
> + interrupt-parent = <&gic>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + clocks {
> + ahb_clk: oscillator0 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + };
> + emmc_clk: oscillator2 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + };
> + flash_clk: oscillator3 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + };
> + ref_clk: oscillator4 {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + };
> + };
> +
> + timer {
> + compatible = "arm,armv8-timer";
> + interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(1) |
> + IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(1) |
> + IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(1) |
> + IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(1) |
> + IRQ_TYPE_LEVEL_LOW)>;
> + };
> +
> + pmu {
> + compatible = "arm,cortex-a72-pmu";
> + interrupts = <GIC_PPI 7 (GIC_CPU_MASK_SIMPLE(1) |
> + IRQ_TYPE_LEVEL_LOW)>;
> + };
> +
> + /* Common UIO device for MSI drivers */
> + uio_penmsi {
> + compatible = "pensando,uio_penmsi";
> + name = "uio_penmsi";
> + };
> +
> +
> + soc: soc {
> + compatible = "simple-bus";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + gic: interrupt-controller@...000 {
> + compatible = "arm,gic-v3";
> + #interrupt-cells = <3>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> + interrupt-controller;
> + reg = <0x0 0x800000 0x0 0x200000>, // GICD
> + <0x0 0xa00000 0x0 0x200000>; // GICR
> + interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +
> + its: interrupt-controller@...000 {
> + compatible = "arm,gic-v3-its";
> + msi-controller;
> + #msi-cells = <1>;
> + reg = <0x0 0x820000 0x0 0x10000>;
> + socionext,synquacer-pre-its =
> + <0xc00000 0x1000000>;
> + };
> + };
> +
> + /*
> + * Until we know the interrupt domain following this, we
> + * are forced to use this is the place where interrupts from
> + * PCI converge. In the ideal case, we use one domain higher,
> + * where the PCI-ness has been shed.
> + */
> + pxc0_intr: intc@...02200 {
> + compatible = "pensando,soc-ictlr-csrintr";
> + interrupt-controller;
> + reg = <0x0 0x20102200 0x0 0x4>;
> + #interrupt-cells = <3>;
> + interrupt-parent = <&gic>;
> + interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "pxc0_intr";
> + };
> +
> + uart0: serial@...0 {
> + device_type = "serial";
> + compatible = "ns16550a";
> + reg = <0x0 0x4800 0x0 0x100>;
> + clocks = <&ref_clk>;
> + interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + };
> +
> + qspi: spi@...0 {
> + compatible = "pensando,cdns-qspi";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x0 0x2400 0x0 0x400>,
> + <0x0 0x7fff0000 0x0 0x1000>;
> + interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&flash_clk>;
> + cdns,fifo-depth = <1024>;
> + cdns,fifo-width = <4>;
> + cdns,trigger-address = <0x7fff0000>;
> + status = "disabled";
> + };
> +
> + gpio0: gpio@...0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "snps,dw-apb-gpio";
> + reg = <0x0 0x4000 0x0 0x78>;
> + status = "disabled";
> +
> + porta: gpio-controller@0 {
> + compatible = "snps,dw-apb-gpio-port";
> + reg = <0>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + ngpios = <8>;
> + interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-controller;
> + interrupt-parent = <&gic>;
> + #interrupt-cells = <2>;
> + };
> + portb: gpio-controller@1 {
> + compatible = "snps,dw-apb-gpio-port";
> + reg = <1>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + ngpios = <8>;
> + };
> + };
> +
> + i2c0: i2c@400 {
> + compatible = "snps,designware-i2c";
> + reg = <0x0 0x400 0x0 0x100>;
> + clocks = <&ahb_clk>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + i2c-sda-hold-time-ns = <480>;
> + snps,sda-timeout-ms = <750>;
> + interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> + status = "disabled";
> + };
> +
> + /* UIO device using interrupt line PCIEMAC */
> + pciemac@...02200 {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + #interrupt-cells = <3>;
> +
> + compatible = "pensando,uio_pciemac";
> + register-type = "csr-interrupt";
> + interrupt-parent = <&pxc0_intr>;
> + interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
> + reg = <0x0 0x20102200 0x0 0x10>; /* pxc0_intr */
> +
> + enable_csr_paddr = <0x0 0x20102200 0x0 0x10>;
> + enable_mask = <(1 << 0)>;
> + };
> +
> + /* MSI UIO device 1 */
> + uio_penmsi1@...000 {
> + compatible = "pensando,uio_penmsi1";
> + reg = <0x0 0x520000 0x0 0x10000>;
> + msi-parent = <&its 0xa>;
> + num-interrupts = <16>; /* # MSI interrupts to get */
> + };
> +
> + spics: spics@...c2468 {
> + compatible = "pensando,elba-spics";
> + reg = <0x0 0x307c2468 0x0 0x4>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + };
So that GPIO-controller is just a single register which provides a way
to toggle the DW APB SPI CS-mode together with their output value.
If so and seeing there are a few more tiny spaces of config
registers added to eMMC, PCI, etc DT node, I suppose all of them
belong to some bigger config space of the SoC. Thus I'd suggest to at
least implement them as part of a System Controller DT node. Then use
that device service to switch on/off corresponding functionality.
See [2] and the rest of added to the kernel DTS files with
syscon-nodes for example.
[2] Documentation/devicetree/bindings/mfd/syscon.yaml
-Sergey
> +
> + spi0: spi@...0 {
> + compatible = "pensando,elba-spi";
> + reg = <0x0 0x2800 0x0 0x100>;
> + clocks = <&ahb_clk>;
> + interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + num-cs = <2>;
> + status = "disabled";
> + };
> +
> + wdt0: watchdog@...0 {
> + compatible = "snps,dw-wdt";
> + reg = <0x0 0x1400 0x0 0x100>;
> + clocks = <&ahb_clk>;
> + interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
> + status = "disabled";
> + };
> + wdt1: watchdog@...0 {
> + compatible = "snps,dw-wdt";
> + reg = <0x0 0x1800 0x0 0x100>;
> + clocks = <&ahb_clk>;
> + interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
> + status = "disabled";
> + };
> + wdt2: watchdog@...0 {
> + compatible = "snps,dw-wdt";
> + reg = <0x0 0x1c00 0x0 0x100>;
> + clocks = <&ahb_clk>;
> + interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> + status = "disabled";
> + };
> + wdt3: watchdog@...0 {
> + compatible = "snps,dw-wdt";
> + reg = <0x0 0x2000 0x0 0x100>;
> + clocks = <&ahb_clk>;
> + interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> + status = "disabled";
> + };
> +
> + emmc: sdio-host-chip@...40000 {
> + compatible = "pensando,elba-emmc";
> + clocks = <&emmc_clk>;
> + interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> + reg = <0x0 0x30440000 0x0 0x10000
> + 0x0 0x30480044 0x0 0x4>;
> + cdns,phy-input-delay-sd-highspeed = <0x4>;
> + cdns,phy-input-delay-legacy = <0x4>;
> + cdns,phy-input-delay-sd-uhs-sdr50 = <0x6>;
> + cdns,phy-input-delay-sd-uhs-ddr50 = <0x16>;
> + cdns,mmc-ddr-1_8v;
> + status = "disabled";
> + } ;
> +
> + pcie@...c2480 {
> + compatible = "pensando,pcie";
> + reg = <0x0 0x307c2480 0x0 0x4 /* MS CFG_WDT */
> + 0x0 0x00001400 0x0 0x10 /* WDT0 */
> + 0x0 0x20000000 0x0 0x00380000>; /* PXB Base */
> + };
> +
> + panic: panicdump@0 {
> + compatible = "pensando,pen-crash";
> + status = "disabled";
> + };
> +
> + bsm@...c2080 {
> + compatible = "pensando,bsm";
> + reg = <0x0 0x307c2080 0x0 0x4>;
> + };
> + };
> + mnet0: mnet0 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x0>;
> + };
> + mnet1: mnet1 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x1>;
> + };
> + mnet2: mnet2 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x2>;
> + };
> + mnet3: mnet3 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x3>;
> + };
> + mnet4: mnet4 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x4>;
> + };
> + mnet5: mnet5 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x5>;
> + };
> + mnet6: mnet6 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x6>;
> + };
> + mnet7: mnet7 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x7>;
> + };
> + mnet8: mnet8 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x8>;
> + };
> + mnet9: mnet9 {
> + compatible = "pensando,mnet";
> + msi-parent = <&its 0x9>;
> + };
> +};
> --
> 2.17.1
>
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