From patchwork Fri May 14 19:22:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 439259 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 418EEC43470 for ; Fri, 14 May 2021 19:28:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17D6261461 for ; Fri, 14 May 2021 19:28:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232535AbhENT3v (ORCPT ); Fri, 14 May 2021 15:29:51 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:59886 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S231703AbhENT3v (ORCPT ); Fri, 14 May 2021 15:29:51 -0400 X-IronPort-AV: E=Sophos;i="5.82,300,1613401200"; d="scan'208";a="81147966" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 15 May 2021 04:23:36 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 611F44010906; Sat, 15 May 2021 04:23:32 +0900 (JST) From: Lad Prabhakar To: Geert Uytterhoeven , Rob Herring , Magnus Damm , Michael Turquette , Stephen Boyd , Greg Kroah-Hartman , Catalin Marinas , Will Deacon , Jiri Slaby , Philipp Zabel , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Biju Das , Lad Prabhakar , Prabhakar Subject: [PATCH 07/16] soc: renesas: Add support to read LSI DEVID register Date: Fri, 14 May 2021 20:22:09 +0100 Message-Id: <20210514192218.13022-8-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210514192218.13022-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20210514192218.13022-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Add support for reading the LSI DEVID register which is present on RZ/G2{L,LC,UL} SoC's. Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das --- drivers/soc/renesas/renesas-soc.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c index 0f8eff4a641a..d73389670eef 100644 --- a/drivers/soc/renesas/renesas-soc.c +++ b/drivers/soc/renesas/renesas-soc.c @@ -64,7 +64,7 @@ static const struct renesas_family fam_shmobile __initconst __maybe_unused = { struct renesas_soc { const struct renesas_family *family; - u8 id; + u32 id; }; static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = { @@ -348,6 +348,25 @@ static int __init renesas_soc_init(void) goto done; } + np = of_find_compatible_node(NULL, NULL, "renesas,devid"); + if (np) { + chipid = of_iomap(np, 0); + of_node_put(np); + + if (chipid) { + product = readl(chipid); + iounmap(chipid); + + if (soc->id && (product & 0xfffffff) != soc->id) { + pr_warn("SoC mismatch (product = 0x%x)\n", + product); + return -ENODEV; + } + } + + goto done; + } + /* Try PRR first, then hardcoded fallback */ np = of_find_compatible_node(NULL, NULL, "renesas,prr"); if (np) {