From patchwork Thu Dec 10 03:39:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 341394 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, 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 121C6C4361B for ; Thu, 10 Dec 2020 03:42:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C637123A7C for ; Thu, 10 Dec 2020 03:42:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730569AbgLJDmH (ORCPT ); Wed, 9 Dec 2020 22:42:07 -0500 Received: from esa2.hgst.iphmx.com ([68.232.143.124]:39110 "EHLO esa2.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729808AbgLJDmH (ORCPT ); Wed, 9 Dec 2020 22:42:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1607572447; x=1639108447; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9HLLil2FdLt0C+guCFzM2bWksJSdqkJONJJEOtFGzT0=; b=XHhJBFMfn1Djm3j1rFhWJjUmur/Pz8O3eRMetI/fJfDuefrYGjp+/77M 69jVffxNV3Pba4UIZ/HL3axqAj4bH/rVb228TkfnNo1tIk2fO1D7KZKeQ yCUI0oJVx30hbi7Qz1++cQtU2yi+j7bf8E814V9qMfaU43MbCB8eHyW07 OUj2v2RILNo0pHu2INOCH6cBC5pJ1pDQjIFbOIweIkYWycNdzLnXmdFhy 2UNmmYuH6IsH3XTPudw9a6NhcNFNj+5u3AwiFdpAXgyqXoHInD0MKnKiY Vfw7XktIL2caZf95Yzy4cd00IithHa4aQIyx5p6npnYxlh9/5AiCQvAzn Q==; IronPort-SDR: 4YLqGc8e3WNTYLKPZiN3Wt2adNmgI+Modes3HRohkDc06mUk0fvR6xNo1QvY2gN9FYMrZlSC5z ybKyykEnBot/DgzsFp3g5OYgXSnBsLe1K99B/pw2YvciQp62X41WBaqnAj5c6kOJ4casE8XKcS 0XQqFruSoL3kZQARjJmkFBnIRTj/2RYAv3PUwUGe4FUByFLNod/Cod/rYfZ6hmRxcK6aFOOiM5 sqJtY5p0v9y33weUnpAjW8v+BGz4Hn86mRyQkWnIYR+xgtTo61BjSWx90pb5xC213fr4g2BQb2 LUk= X-IronPort-AV: E=Sophos;i="5.78,407,1599494400"; d="scan'208";a="258551206" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 10 Dec 2020 11:51:29 +0800 IronPort-SDR: p/GOHRdVUZqBh4gjFXlkgxCv8y6uAPNo0wtygU5AcVKZ4G6iZYCpV+aE4rBg3cPSW35okltFJ1 ZFZe2pi1YrABVDHcziu8AgBfaoyP5RI/o= Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Dec 2020 19:24:17 -0800 IronPort-SDR: BAHjQF51I/YFIRYU2HoCyNga3bGD8LiSemXd3U7G2QfIuLZEOckCoh9X6FDJ5R2ziNZ2D9fk0M GuK/Bq/sVWCw== WDCIronportException: Internal Received: from wdapacbjl0003.my.asia.wdc.com (HELO twashi.fujisawa.hgst.com) ([10.84.71.173]) by uls-op-cesaip01.wdc.com with ESMTP; 09 Dec 2020 19:40:19 -0800 From: Damien Le Moal To: Palmer Dabbelt , linux-riscv@lists.infradead.org, Rob Herring , devicetree@vger.kernel.org, Stephen Boyd , linux-clk@vger.kernel.org, Linus Walleij , linux-gpio@vger.kernel.org, Philipp Zabel Cc: Sean Anderson Subject: [PATCH v7 04/22] riscv: Fix builtin DTB handling Date: Thu, 10 Dec 2020 12:39:45 +0900 Message-Id: <20201210034003.222297-5-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201210034003.222297-1-damien.lemoal@wdc.com> References: <20201210034003.222297-1-damien.lemoal@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org All SiPeed K210 MAIX boards have the exact same vendor, arch and implementation IDs, preventing differentiation to select the correct device tree to use through the SOC_BUILTIN_DTB_DECLARE() macro. This result in this macro to be useless and mandates changing the code of the sysctl driver to change the builtin device tree suitable for the target board. Fix this problem by removing the SOC_BUILTIN_DTB_DECLARE() macro since it is used only for the K210 support. The code searching the builtin DTBs using the vendor, arch an implementation IDs is also removed. Support for builtin DTB falls back to the simpler and more traditional handling of builtin DTB using the CONFIG_BUILTIN_DTB option, similarly to other architectures. Signed-off-by: Damien Le Moal --- arch/riscv/Kconfig.socs | 19 ++++++++++---- arch/riscv/boot/dts/Makefile | 2 +- arch/riscv/boot/dts/kendryte/Makefile | 5 ++-- arch/riscv/include/asm/soc.h | 38 --------------------------- arch/riscv/kernel/soc.c | 27 ------------------- arch/riscv/mm/init.c | 6 +---- drivers/soc/kendryte/k210-sysctl.c | 12 --------- 7 files changed, 19 insertions(+), 90 deletions(-) diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs index 8a55f6156661..0bc3e28581f2 100644 --- a/arch/riscv/Kconfig.socs +++ b/arch/riscv/Kconfig.socs @@ -32,9 +32,7 @@ config SOC_KENDRYTE help This enables support for Kendryte K210 SoC platform hardware. -config SOC_KENDRYTE_K210_DTB - def_bool y - depends on SOC_KENDRYTE_K210_DTB_BUILTIN +if SOC_KENDRYTE config SOC_KENDRYTE_K210_DTB_BUILTIN bool "Builtin device tree for the Kendryte K210" @@ -42,10 +40,21 @@ config SOC_KENDRYTE_K210_DTB_BUILTIN default y select OF select BUILTIN_DTB - select SOC_KENDRYTE_K210_DTB help - Builds a device tree for the Kendryte K210 into the Linux image. + Build a device tree for the Kendryte K210 into the Linux image. This option should be selected if no bootloader is being used. If unsure, say Y. +config SOC_KENDRYTE_K210_DTB_SOURCE + string "Source file for the Kendryte K210 builtin DTB" + depends on SOC_KENDRYTE + depends on SOC_KENDRYTE_K210_DTB_BUILTIN + default "k210" + help + Base name (without suffix, relative to arch/riscv/boot/dts/kendryte) + for the DTS file that will be used to produce the DTB linked into the + kernel. + +endif + endmenu diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile index ca1f8cbd78c0..21e3905f1c44 100644 --- a/arch/riscv/boot/dts/Makefile +++ b/arch/riscv/boot/dts/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 subdir-y += sifive -subdir-y += kendryte +subdir-$(CONFIG_SOC_KENDRYTE) += kendryte obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y)) diff --git a/arch/riscv/boot/dts/kendryte/Makefile b/arch/riscv/boot/dts/kendryte/Makefile index 1a88e616f18e..83636693166d 100644 --- a/arch/riscv/boot/dts/kendryte/Makefile +++ b/arch/riscv/boot/dts/kendryte/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -dtb-$(CONFIG_SOC_KENDRYTE_K210_DTB) += k210.dtb - +ifneq ($(CONFIG_SOC_KENDRYTE_K210_DTB_SOURCE),"") +dtb-y += $(strip $(shell echo $(CONFIG_SOC_KENDRYTE_K210_DTB_SOURCE))).dtb obj-$(CONFIG_SOC_KENDRYTE_K210_DTB_BUILTIN) += $(addsuffix .o, $(dtb-y)) +endif diff --git a/arch/riscv/include/asm/soc.h b/arch/riscv/include/asm/soc.h index 6c8363b1f327..f494066051a2 100644 --- a/arch/riscv/include/asm/soc.h +++ b/arch/riscv/include/asm/soc.h @@ -21,42 +21,4 @@ void soc_early_init(void); extern unsigned long __soc_early_init_table_start; extern unsigned long __soc_early_init_table_end; -/* - * Allows Linux to provide a device tree, which is necessary for SOCs that - * don't provide a useful one on their own. - */ -struct soc_builtin_dtb { - unsigned long vendor_id; - unsigned long arch_id; - unsigned long imp_id; - void *(*dtb_func)(void); -}; - -/* - * The argument name must specify a valid DTS file name without the dts - * extension. - */ -#define SOC_BUILTIN_DTB_DECLARE(name, vendor, arch, impl) \ - extern void *__dtb_##name##_begin; \ - \ - static __init __used \ - void *__soc_builtin_dtb_f__##name(void) \ - { \ - return (void *)&__dtb_##name##_begin; \ - } \ - \ - static const struct soc_builtin_dtb __soc_builtin_dtb__##name \ - __used __section("__soc_builtin_dtb_table") = \ - { \ - .vendor_id = vendor, \ - .arch_id = arch, \ - .imp_id = impl, \ - .dtb_func = __soc_builtin_dtb_f__##name, \ - } - -extern unsigned long __soc_builtin_dtb_table_start; -extern unsigned long __soc_builtin_dtb_table_end; - -void *soc_lookup_builtin_dtb(void); - #endif diff --git a/arch/riscv/kernel/soc.c b/arch/riscv/kernel/soc.c index c7b0a73e382e..a0516172a33c 100644 --- a/arch/riscv/kernel/soc.c +++ b/arch/riscv/kernel/soc.c @@ -26,30 +26,3 @@ void __init soc_early_init(void) } } } - -static bool soc_builtin_dtb_match(unsigned long vendor_id, - unsigned long arch_id, unsigned long imp_id, - const struct soc_builtin_dtb *entry) -{ - return entry->vendor_id == vendor_id && - entry->arch_id == arch_id && - entry->imp_id == imp_id; -} - -void * __init soc_lookup_builtin_dtb(void) -{ - unsigned long vendor_id, arch_id, imp_id; - const struct soc_builtin_dtb *s; - - __asm__ ("csrr %0, mvendorid" : "=r"(vendor_id)); - __asm__ ("csrr %0, marchid" : "=r"(arch_id)); - __asm__ ("csrr %0, mimpid" : "=r"(imp_id)); - - for (s = (void *)&__soc_builtin_dtb_table_start; - (void *)s < (void *)&__soc_builtin_dtb_table_end; s++) { - if (soc_builtin_dtb_match(vendor_id, arch_id, imp_id, s)) - return s->dtb_func(); - } - - return NULL; -} diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 8e577f14f120..c32ff32cf9ab 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -601,11 +601,7 @@ static void __init setup_vm_final(void) asmlinkage void __init setup_vm(uintptr_t dtb_pa) { #ifdef CONFIG_BUILTIN_DTB - dtb_early_va = soc_lookup_builtin_dtb(); - if (!dtb_early_va) { - /* Fallback to first available DTS */ - dtb_early_va = (void *) __dtb_start; - } + dtb_early_va = (void *) __dtb_start; #else dtb_early_va = (void *)dtb_pa; #endif diff --git a/drivers/soc/kendryte/k210-sysctl.c b/drivers/soc/kendryte/k210-sysctl.c index 707019223dd8..4608fbca20e1 100644 --- a/drivers/soc/kendryte/k210-sysctl.c +++ b/drivers/soc/kendryte/k210-sysctl.c @@ -246,15 +246,3 @@ static void __init k210_soc_early_init(const void *fdt) iounmap(regs); } SOC_EARLY_INIT_DECLARE(generic_k210, "kendryte,k210", k210_soc_early_init); - -#ifdef CONFIG_SOC_KENDRYTE_K210_DTB_BUILTIN -/* - * Generic entry for the default k210.dtb embedded DTB for boards with: - * - Vendor ID: 0x4B5 - * - Arch ID: 0xE59889E6A5A04149 (= "Canaan AI" in UTF-8 encoded Chinese) - * - Impl ID: 0x4D41495832303030 (= "MAIX2000") - * These values are reported by the SiPEED MAXDUINO, SiPEED MAIX GO and - * SiPEED Dan dock boards. - */ -SOC_BUILTIN_DTB_DECLARE(k210, 0x4B5, 0xE59889E6A5A04149, 0x4D41495832303030); -#endif