From patchwork Tue Jan 19 09:21:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bert Vermeulen X-Patchwork-Id: 12029911 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2828C433DB for ; Tue, 19 Jan 2021 14:25:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C48DC206E9 for ; Tue, 19 Jan 2021 14:25:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2395368AbhASORx (ORCPT ); Tue, 19 Jan 2021 09:17:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732588AbhASJWb (ORCPT ); Tue, 19 Jan 2021 04:22:31 -0500 Received: from yawp.biot.com (yawp.biot.com [IPv6:2a01:4f8:10a:8e::fce2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE182C0613D3 for ; Tue, 19 Jan 2021 01:21:46 -0800 (PST) Received: from debian-spamd by yawp.biot.com with sa-checked (Exim 4.93) (envelope-from ) id 1l1nCq-00EDvk-Rb for linux-mips@vger.kernel.org; Tue, 19 Jan 2021 10:21:45 +0100 Received: from [2a02:578:460c:1:ae1f:6bff:fed1:9ca8] (helo=sumner.biot.com) by yawp.biot.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1l1nCQ-00EDs6-UH; Tue, 19 Jan 2021 10:21:19 +0100 Received: from bert by sumner.biot.com with local (Exim 4.93) (envelope-from ) id 1l1nCQ-000mDN-FT; Tue, 19 Jan 2021 10:21:18 +0100 From: Bert Vermeulen To: Thomas Bogendoerfer , Rob Herring , linux-mips@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Sander Vanheule , John Crispin , Birger Koblitz Cc: Bert Vermeulen Subject: [PATCH v4 2/5] Add support for Realtek RTL838x/RTL839x switch SoCs Date: Tue, 19 Jan 2021 10:21:06 +0100 Message-Id: <20210119092109.185282-3-bert@biot.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210119092109.185282-1-bert@biot.com> References: <20210119092109.185282-1-bert@biot.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org The RTL838x/839x family of SoCs are Realtek switches with an embedded MIPS core. * RTL838x - 500MHz 4kce single core - 1Gbit ports and L2 features * RTL839x - 700MHz 34Kc single core - 1Gbit ports and L2 features These switches, depending on the exact part number, will have anywhere between 8 and 52 ports. The MIPS core is wired to a switch cpu port which has a tagging feature allowing us to make use of the DSA subsystem. The SoCs are somewhat basic in certain areas, getting better with more advanced features on newer series. The switch functionality is MMIO-mapped via a large MFD region. The SoCs have the following peripherals * ethernet * switch * uart - ns16550a * spi-flash interface * gpio * wdt * led The code was derived from various vendor SDKs based on Linux v2.6 kernels. This patchset allows us to boot RTL838x/RTL839x units with basic support. Most of the other drivers are already written and functional, and work to get them upstream is already in progress. Signed-off-by: Birger Koblitz Signed-off-by: Bert Vermeulen Signed-off-by: John Crispin Signed-off-by: Sander Vanheule --- arch/mips/boot/dts/Makefile | 1 + arch/mips/boot/dts/realtek/rtl838x.dtsi | 21 +++++++++ arch/mips/boot/dts/realtek/rtl83xx.dtsi | 59 +++++++++++++++++++++++++ 3 files changed, 81 insertions(+) create mode 100644 arch/mips/boot/dts/realtek/rtl838x.dtsi create mode 100644 arch/mips/boot/dts/realtek/rtl83xx.dtsi diff --git a/arch/mips/boot/dts/Makefile b/arch/mips/boot/dts/Makefile index 0259238d7a2e..60bd7d2a9ad8 100644 --- a/arch/mips/boot/dts/Makefile +++ b/arch/mips/boot/dts/Makefile @@ -14,6 +14,7 @@ subdir-$(CONFIG_FIT_IMAGE_FDT_NI169445) += ni subdir-$(CONFIG_MACH_PIC32) += pic32 subdir-$(CONFIG_ATH79) += qca subdir-$(CONFIG_RALINK) += ralink +subdir-$(CONFIG_MACH_REALTEK_RTL) += realtek subdir-$(CONFIG_FIT_IMAGE_FDT_XILFPGA) += xilfpga obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y)) diff --git a/arch/mips/boot/dts/realtek/rtl838x.dtsi b/arch/mips/boot/dts/realtek/rtl838x.dtsi new file mode 100644 index 000000000000..6cc4ff5c0d19 --- /dev/null +++ b/arch/mips/boot/dts/realtek/rtl838x.dtsi @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause + +/ { + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + compatible = "mips,mips4KEc"; + reg = <0>; + clocks = <&baseclk 0>; + clock-names = "cpu"; + }; + }; + + baseclk: baseclk { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <500000000>; + }; +}; diff --git a/arch/mips/boot/dts/realtek/rtl83xx.dtsi b/arch/mips/boot/dts/realtek/rtl83xx.dtsi new file mode 100644 index 000000000000..de65a111b626 --- /dev/null +++ b/arch/mips/boot/dts/realtek/rtl83xx.dtsi @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause + +/ { + #address-cells = <1>; + #size-cells = <1>; + + aliases { + serial0 = &uart0; + serial1 = &uart1; + }; + + cpuintc: cpuintc { + compatible = "mti,cpu-interrupt-controller"; + #address-cells = <0>; + #interrupt-cells = <1>; + interrupt-controller; + }; + + soc: soc { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x18000000 0x10000>; + + uart0: uart@2000 { + compatible = "ns16550a"; + reg = <0x2000 0x100>; + + clock-frequency = <200000000>; + + interrupt-parent = <&cpuintc>; + interrupts = <31>; + + reg-io-width = <1>; + reg-shift = <2>; + fifo-size = <1>; + no-loopback-test; + + status = "disabled"; + }; + + uart1: uart@2100 { + compatible = "ns16550a"; + reg = <0x2100 0x100>; + + clock-frequency = <200000000>; + + interrupt-parent = <&cpuintc>; + interrupts = <30>; + + reg-io-width = <1>; + reg-shift = <2>; + fifo-size = <1>; + no-loopback-test; + + status = "disabled"; + }; + }; +};