From nobody Mon May 11 08:31:21 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D4B5C433EF for ; Sat, 9 Apr 2022 17:34:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242922AbiDIRgN (ORCPT ); Sat, 9 Apr 2022 13:36:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240267AbiDIRgK (ORCPT ); Sat, 9 Apr 2022 13:36:10 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 908A085664 for ; Sat, 9 Apr 2022 10:34:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1649525624; bh=+GAhbPxfW2Aqj/rt34ikPXdWtTV7OOaFom8Nfhzgoyk=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=cZ0qM2fkhqlxFrTaWR8JONXMKHXoOwusfnWuTU86fMw4FbTHD6roJ1F/qyMGSHQvt RMVl/ESbu/tRdrcmbHzIRFx4RPCMHwsVf+mic5mtYY4RFvvtHOccas3szbd2n5zg76 6IVRl95cK8TLrB+3Yyy9vdWNERfzA5eoJl2yk3bc= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([78.35.207.192]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MlNpH-1oOAh32mKb-00ll5P; Sat, 09 Apr 2022 19:33:44 +0200 From: =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= To: openbmc@lists.ozlabs.org Cc: Joel Stanley , =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= , Nicolas Ferre , Conor Dooley , Linus Walleij , Hector Martin , Arnd Bergmann , linux-kernel@vger.kernel.org Subject: [PATCH v2] soc: nuvoton: Add SoC info driver for WPCM450 Date: Sat, 9 Apr 2022 19:33:11 +0200 Message-Id: <20220409173319.2491196-1-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:Stl/Z8Ym+Qu+nNhKiC6mlRhOFmcxDG/eLHNcDsHGXOPdQUo5eOF M5LLIjkpUyk19lyoE46jOn4rNx3W8PqLz/yY8wVSGIoaDIF3mWfNiTCZi9IFoxhan8TTyoi qvr1u2zKOyN/vL9yAW3Es+r4fZ4zm+FhcF9qQPfBO4IeakYIa1JEmOxWeWFTfeppe4gBDD/ H+aWzstAJ7WujA1RX9Juw== X-UI-Out-Filterresults: notjunk:1;V03:K0:fk1wO4UE7sc=:+kVJM4EGswCLlDFJRozLAP mU7Urkc5/dM43l46/JnVSBDNMVAx44bUEw7NbBu3/N4PmPn3X2eVUPcIcFIIcldBD1nz3KuJ+ WFCyemS7c03hXUbppv9beZ47CHPA7WtOuo/2nJj0G/ahvlDRo46VZdI50zmrDUfMpbcts0xRr dGync+OaH6WiUl39lUTYRCmT+5mPPgtGocpmhfX0NpOAsATn5S2YRUzEW8tcvqxQr5yazz9WJ TnWRcgo9ykVyHbmGoJpzJ7+uO8q2vWohsK+AoYLhfL5n6NxxKJf77IJDy4u6ViWgR89np2UYR qSHm6+w+y0CxhTHhMcipxAi116xitvJvoV2spZA3ui8KS/00h63JFg8fA/8NuD1oH1ji2rlPr nkaRR2I4MjEFf8yTaCKjxVsKoT/dWkihZIP+7hmWLpHYYleao1E4VjRQADnn3vwt9Qt+Q/klB oo/Yy47qxnjICeZw3t58SeyVNc1RMHNb0lWZrboAxA5xoCgICETcFP6eJ6df0FKsxBJ+UQtkb JFV20T6TDkuVYnTqBok7WSy1w+r3qqaJ42Q6iTeBiDAa2+F6orfy4pmqJyxue+XB1p4BInotO yatz1FNuVAU72Srt77ZFfAXBNrEkVauC5SIyZho/XePOyNXLMomy21saErv1YDrum00sO1fai 0e108Dz0WSIk3i1wQHdCfGauzcMDoV2k5Vyiy3YgozM47X2RUoQfR85msUgRVzq/bUihDKfNK qnqks57H3Pg/weRd7Z6aT8aYssq25BkBL9lXScpZgz1EEXnlD+1+YsBq9DIRNbvqQRYVF9ZKD dg5Yb+tGtAAwwmNq3+yS5P3ssoyoKyGS2/ZjUpKq6jxptW+vKhu9ihRY276TteNSOMyaxGFhV 1ig43P6Nt+jn19xSW12viwXKBfAo1cTmfS7hsX6maUgPgCXzGYiT2TeiAhE1ajIEqPSZX7RG0 fkKhd6p2AkG9AE5FavBuX6F4LeFWHvz/Sd7bYwfNIl9QcmdP0ZL5OBOfVbmmtemRhPJTYrpdf AqxsDbywGLzzkXG57WPjwyDojf4NowcKA/OvP+UwLtVcENY0lfXBr2slPqwMqtLKRAi9XB9Hx 4zWwuz1c1xOO7Y= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add a SoC information driver for Nuvoton WPCM450 SoCs. It provides information such as the SoC revision. Signed-off-by: Jonathan Neusch=C3=A4fer Reviewed-by: Joel Stanley Reviewed-by: Paul Menzel --- v2: - Add R-b tag - rebase on 5.18-rc1 v1: - https://lore.kernel.org/lkml/20220129143316.2321460-1-j.neuschaefer@gmx.n= et/ --- drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/nuvoton/Kconfig | 11 ++++ drivers/soc/nuvoton/Makefile | 2 + drivers/soc/nuvoton/wpcm450-soc.c | 90 +++++++++++++++++++++++++++++++ 5 files changed, 105 insertions(+) create mode 100644 drivers/soc/nuvoton/Kconfig create mode 100644 drivers/soc/nuvoton/Makefile create mode 100644 drivers/soc/nuvoton/wpcm450-soc.c diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index c5aae42673d3b..42a5e0be77f3d 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -14,6 +14,7 @@ source "drivers/soc/ixp4xx/Kconfig" source "drivers/soc/litex/Kconfig" source "drivers/soc/mediatek/Kconfig" source "drivers/soc/microchip/Kconfig" +source "drivers/soc/nuvoton/Kconfig" source "drivers/soc/qcom/Kconfig" source "drivers/soc/renesas/Kconfig" source "drivers/soc/rockchip/Kconfig" diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 904eec2a78713..3239fc49eeb27 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_SOC_XWAY) +=3D lantiq/ obj-$(CONFIG_LITEX_SOC_CONTROLLER) +=3D litex/ obj-y +=3D mediatek/ obj-y +=3D microchip/ +obj-y +=3D nuvoton/ obj-y +=3D amlogic/ obj-y +=3D qcom/ obj-y +=3D renesas/ diff --git a/drivers/soc/nuvoton/Kconfig b/drivers/soc/nuvoton/Kconfig new file mode 100644 index 0000000000000..50166f37096b7 --- /dev/null +++ b/drivers/soc/nuvoton/Kconfig @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 +menuconfig WPCM450_SOC + bool "Nuvoton WPCM450 SoC driver" + default y if ARCH_WPCM450 + select SOC_BUS + help + Say Y here to compile the SoC information driver for Nuvoton + WPCM450 SoCs. + + This driver provides information such as the SoC model and + revision. diff --git a/drivers/soc/nuvoton/Makefile b/drivers/soc/nuvoton/Makefile new file mode 100644 index 0000000000000..e30317b4e8290 --- /dev/null +++ b/drivers/soc/nuvoton/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_WPCM450_SOC) +=3D wpcm450-soc.o diff --git a/drivers/soc/nuvoton/wpcm450-soc.c b/drivers/soc/nuvoton/wpcm45= 0-soc.c new file mode 100644 index 0000000000000..8bad63e1f7a80 --- /dev/null +++ b/drivers/soc/nuvoton/wpcm450-soc.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton WPCM450 SoC Identification + * + * Copyright (C) 2022 Jonathan Neusch=C3=A4fer + */ + +#include +#include +#include +#include +#include + +#define GCR_PDID 0 +#define PDID_CHIP(x) ((x) & 0x00ffffff) +#define CHIP_WPCM450 0x926450 +#define PDID_REV(x) ((x) >> 24) + +struct revision { + u8 number; + const char *name; +}; + +const struct revision revisions[] __initconst =3D { + { 0x00, "Z1" }, + { 0x03, "Z2" }, + { 0x04, "Z21" }, + { 0x08, "A1" }, + { 0x09, "A2" }, + { 0x0a, "A3" }, + {} +}; + +static const char * __init get_revision(u8 rev) +{ + int i; + + for (i =3D 0; revisions[i].name; i++) + if (revisions[i].number =3D=3D rev) + return revisions[i].name; + return NULL; +} + +static int __init wpcm450_soc_init(void) +{ + struct soc_device_attribute *attr; + struct soc_device *soc; + const char *revision; + struct regmap *gcr; + u32 pdid; + int ret; + + if (!of_machine_is_compatible("nuvoton,wpcm450")) + return 0; + + gcr =3D syscon_regmap_lookup_by_compatible("nuvoton,wpcm450-gcr"); + if (IS_ERR(gcr)) + return PTR_ERR(gcr); + ret =3D regmap_read(gcr, GCR_PDID, &pdid); + if (ret) + return ret; + + if (PDID_CHIP(pdid) !=3D CHIP_WPCM450) { + pr_warn("Unknown chip ID in GCR.PDID: 0x%06x\n", PDID_CHIP(pdid)); + return -ENODEV; + } + + revision =3D get_revision(PDID_REV(pdid)); + if (!revision) { + pr_warn("Unknown chip revision in GCR.PDID: 0x%02x\n", PDID_REV(pdid)); + return -ENODEV; + } + + attr =3D kzalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) + return -ENOMEM; + + attr->family =3D "Nuvoton NPCM"; + attr->soc_id =3D "WPCM450"; + attr->revision =3D revision; + soc =3D soc_device_register(attr); + if (IS_ERR(soc)) { + kfree(attr); + pr_warn("Could not register SoC device\n"); + return PTR_ERR(soc); + } + + return 0; +} +device_initcall(wpcm450_soc_init); -- 2.35.1