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Message-ID: <20191117104726.2b1fccb8@why>
Date: Sun, 17 Nov 2019 10:47:26 +0000
From: Marc Zyngier <maz@...terjones.org>
To: Andreas Färber <afaerber@...e.de>
Cc: linux-realtek-soc@...ts.infradead.org,
Mark Rutland <mark.rutland@....com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Rob Herring <robh+dt@...nel.org>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 3/8] ARM: dts: Prepare Realtek RTD1195 and MeLE X1000
On Sun, 17 Nov 2019 08:21:04 +0100
Andreas Färber <afaerber@...e.de> wrote:
Hi Andreas,
> Add Device Trees for Realtek RTD1195 SoC and MeLE X1000 TV box.
>
> Reuse the existing RTD1295 watchdog compatible for now.
>
> Reviewed-by: Rob Herring <robh@...nel.org>
> [AF: Fixed r-bus size, fixed GIC CPU mask, updated memreserve]
> Signed-off-by: Andreas Färber <afaerber@...e.de>
> ---
> v2 -> v3:
> * Fixed r-bus size in /soc ranges from 0x1000000 to 0x70000 (James)
> * Adjusted /memreserve/ to close gap from 0xa800 to 0xc000 for full 0x100000
> * Changed arch timer from GIC_CPU_MASK_RAW(0xf) to GIC_CPU_MASK_SIMPLE(2)
> squashed from RTD1395 v1 series
>
> v1 -> v2:
> * Dropped /memreserve/ and reserved-memory nodes for peripherals and NOR (Rob)
> * Carved them out from memory reg instead (Rob)
> * Converted some /memreserve/s to reserved-memory nodes
>
> arch/arm/boot/dts/Makefile | 2 +
> arch/arm/boot/dts/rtd1195-mele-x1000.dts | 31 ++++++++
> arch/arm/boot/dts/rtd1195.dtsi | 127 +++++++++++++++++++++++++++++++
> 3 files changed, 160 insertions(+)
> create mode 100644 arch/arm/boot/dts/rtd1195-mele-x1000.dts
> create mode 100644 arch/arm/boot/dts/rtd1195.dtsi
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 08011dc8c7a6..4853a13c8cf2 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -865,6 +865,8 @@ dtb-$(CONFIG_ARCH_QCOM) += \
> dtb-$(CONFIG_ARCH_RDA) += \
> rda8810pl-orangepi-2g-iot.dtb \
> rda8810pl-orangepi-i96.dtb
> +dtb-$(CONFIG_ARCH_REALTEK) += \
> + rtd1195-mele-x1000.dtb
> dtb-$(CONFIG_ARCH_REALVIEW) += \
> arm-realview-pb1176.dtb \
> arm-realview-pb11mp.dtb \
> diff --git a/arch/arm/boot/dts/rtd1195-mele-x1000.dts b/arch/arm/boot/dts/rtd1195-mele-x1000.dts
> new file mode 100644
> index 000000000000..834b430e6250
> --- /dev/null
> +++ b/arch/arm/boot/dts/rtd1195-mele-x1000.dts
> @@ -0,0 +1,31 @@
> +// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
> +/*
> + * Copyright (c) 2017-2019 Andreas Färber
> + */
> +
> +/dts-v1/;
> +
> +#include "rtd1195.dtsi"
> +
> +/ {
> + compatible = "mele,x1000", "realtek,rtd1195";
> + model = "MeLE X1000";
> +
> + aliases {
> + serial0 = &uart0;
> + };
> +
> + chosen {
> + stdout-path = "serial0:115200n8";
> + };
> +
> + memory@0 {
> + device_type = "memory";
> + reg = <0x0 0x18000000>,
> + <0x19100000 0x26f00000>;
> + };
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/rtd1195.dtsi b/arch/arm/boot/dts/rtd1195.dtsi
> new file mode 100644
> index 000000000000..4e3866fe8f6e
> --- /dev/null
> +++ b/arch/arm/boot/dts/rtd1195.dtsi
> @@ -0,0 +1,127 @@
> +// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
> +/*
> + * Copyright (c) 2017-2019 Andreas Färber
> + */
> +
> +/memreserve/ 0x00000000 0x0000a800; /* boot code */
> +/memreserve/ 0x0000a800 0x000f5800;
> +/memreserve/ 0x17fff000 0x00001000;
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> + compatible = "realtek,rtd1195";
> + interrupt-parent = <&gic>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a7";
> + reg = <0x0>;
> + clock-frequency = <1000000000>;
> + };
> +
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a7";
> + reg = <0x1>;
> + clock-frequency = <1000000000>;
> + };
> + };
> +
> + reserved-memory {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> +
> + rpc_comm: rpc@...0 {
> + reg = <0x0000b000 0x1000>;
> + };
> +
> + audio@...0000 {
> + reg = <0x01b00000 0x400000>;
> + };
> +
> + rpc_ringbuf: rpc@...e000 {
> + reg = <0x01ffe000 0x4000>;
> + };
> +
> + secure@...00000 {
> + reg = <0x10000000 0x100000>;
> + no-map;
> + };
> + };
> +
> + arm-pmu {
> + compatible = "arm,cortex-a7-pmu";
> + interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-affinity = <&cpu0>, <&cpu1>;
> + };
> +
> + timer {
> + compatible = "arm,armv7-timer";
> + interrupts = <GIC_PPI 13
> + (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 14
> + (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 11
> + (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
> + <GIC_PPI 10
> + (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>;
> + clock-frequency = <27000000>;
This is 2019, and yet it feels like 2011. This should be setup in the
bootloader, not in DT...
> + };
> +
> + osc27M: osc {
> + compatible = "fixed-clock";
> + clock-frequency = <27000000>;
> + #clock-cells = <0>;
> + clock-output-names = "osc27M";
> + };
> +
> + soc {
> + compatible = "simple-bus";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0x18000000 0x18000000 0x00070000>,
> + <0x18100000 0x18100000 0x01000000>,
> + <0x40000000 0x40000000 0xc0000000>;
> +
> + wdt: watchdog@...07680 {
> + compatible = "realtek,rtd1295-watchdog";
> + reg = <0x18007680 0x100>;
> + clocks = <&osc27M>;
> + };
> +
> + uart0: serial@...07800 {
> + compatible = "snps,dw-apb-uart";
> + reg = <0x18007800 0x400>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + clock-frequency = <27000000>;
> + status = "disabled";
> + };
> +
> + uart1: serial@...1b200 {
> + compatible = "snps,dw-apb-uart";
> + reg = <0x1801b200 0x100>;
> + reg-shift = <2>;
> + reg-io-width = <4>;
> + clock-frequency = <27000000>;
> + status = "disabled";
> + };
> +
> + gic: interrupt-controller@...11000 {
> + compatible = "arm,cortex-a7-gic";
> + reg = <0xff011000 0x1000>,
> + <0xff012000 0x2000>;
> + interrupt-controller;
> + #interrupt-cells = <3>;
You know what I'm going to say: GICH and GIV are missing, as well as
the maintenance interrupt. This is all bog-standard HW (most probably a
GIC400), so there is no reason for this information not to be present.
M.
--
Without deviation from the norm, progress is not possible.
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