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Sat, 18 Jun 2022 06:47:29 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1655498805; bh=iaIFSLNn0yklCqLnafJqQ+I6bFLTwxIwEcdTu4zodc8=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=CG+hyI8REyBqRwwW7ck0QIuBI3l4t5i/Gxf8wka6OgQSUAzTNUwnANBhnAoEFIbgA iebSTQTIcL/F0AMXL0EDeylY08KKrucUZGC6M4/tctjyEi6ZE7286CUh2fSqV0NaBu yfXrt9//8xUxYl1amaFWnYiGl1cv0SuoiUUX8O1Q= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from longitude ([87.79.145.145]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1M42jK-1o2Ird2FO4-0005pc; Fri, 17 Jun 2022 22:46:45 +0200 From: =?utf-8?q?Jonathan_Neusch=C3=A4fer?= To: openbmc@lists.ozlabs.org Subject: [PATCH v5] soc: nuvoton: Add SoC info driver for WPCM450 Date: Fri, 17 Jun 2022 22:46:12 +0200 Message-Id: <20220617204621.2578264-1-j.neuschaefer@gmx.net> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-Provags-ID: V03:K1:/YDohyDLGP2/N5mQ00CwOy8kbNwMFBlby8KtUS+me3sK9j1Vl00 J2zQxd1ln5oGPYhnurIBMrGyuwQy03YL64yn/gM31QsyLNDSY4Zc+VRjC/5ze6HoTphQ+2d HBqOoMrXlTKDlWBDkE6qY5er7hL/UbLGSrR2+olScvwBaut4U6d68NTroC4qg2tt1qevp3i 6HDF0rUu3plAZa8seGKsA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:XG4BIobbrnQ=:b8wRvxLBImRqxqgPZmvIAh 9AkbkoIKyuPIUfN0+TQj5RkEo4kX64Iy7a2qMQmBKgjdCvlvta77JkKWY1eAf+ZsWjmPz03Ha xpXRqTpdz9qv4u8jTxqztxeyuNe0yA0OJzOqcLCKWlH0Xq32RK8UiYySw2gYJzDvNbTMRc1S8 1c1PNG86ZG5UWObcZulKPbqY3nqz1Zdt7PDROqnxLrwywgfP5mmXIWW1f/Gq0PDTDg77tBf1S sX5urnq8QVAS/nR4rcbrc8eWhenA1thHahvR2eC47uiEirYzkrHic+Urg/ArlHk9onmVqNp+C zD9vMmA3snV23temSalpYmWr17b3x98QE6lQIr2uH3FRLsFKNVSCn7zK7KUcCDcWQUrX4DNn2 3weHA372H9CmvwYXiwFPhaEZOik8Ky1mt580QfQb+ssAqug6jHxM+yk8+JoAjcCkcRdKoA6oW dC7xOyCSNYngmYTt2oWlV9krUE+O+MeoXQbLoJ8r5S3COt1sV7s1c9CNkXdawi4Zd8aTdYjJS GYkxydJWhhpbf6EnrcZIO2ReDjG5r1V9/lO6c4hB4djh15D/9FJi/5GexED3/pakvdFjLJ4yF oxtOPB7hWcTXC10yYZaX4i7kA0M+DgnP9i3A4WJAq52Sev6yYGp9gwlsEhBJunNw7bvDxxlAW TanlYwW+rAwC+EkixuuRZf5pLXblWvOCdJE1KCRJyGZsJZUCR7Ww40iF6lAcyEl+Bkb79cEmS bqIn5SVFNFZBPysXLLUdTFsuXLJqi5UEEN8A6H7JOZME5048LNVpvN2ffPXUMmezUnMnQSAW1 zaAo51Vp/JuIVLVOb3PYjmAG1ncd5tRGVCVyaIz9rszeNnCcv+H/nhovTsbhEqg26V2lwn/wu RD+Mnc7dlNUkDsMTFPTFPWylFmgSyADSVrpe2wQOEsM50ou7X54ovmqPmur8RH+MaXhpFeHkK 3ecm77Y37kbeRn4cm+Wml/fEcLKk08lUOhdYXBjsbxIElFnWQG1Ol6gBEOCku4JNTZlcw7nbs r4k71kXY7k/eG3hNQQqBDAdw+bleE+ai+y3g8RFU6ydAkLfYhrfs72UKz4X141iM1+lw8oGc5 EbVs/Iwt/pWuIdTfH1r96xQ6060m3dzGfKTemK028QMF8lyx2qBAwQEvg== X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paul Menzel , Brian Norris , Arnd Bergmann , Sven Peter , linux-kernel@vger.kernel.org, Linus Walleij , Hector Martin , Nicolas Ferre , =?utf-8?q?Jonathan_Neusch?= =?utf-8?q?=C3=A4fer?= , Lubomir Rintel , Conor Dooley , Joel Stanley , Robert Jarzmik , Guenter Roeck Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" Add a SoC information driver for Nuvoton WPCM450 SoCs. It provides information such as the SoC revision. Usage example: # grep . /sys/devices/soc0/* /sys/devices/soc0/family:Nuvoton NPCM /sys/devices/soc0/revision:A3 /sys/devices/soc0/soc_id:WPCM450 Signed-off-by: Jonathan Neuschäfer Reviewed-by: Joel Stanley Reviewed-by: Paul Menzel --- v5: - Change Kconfig option from bool to tristate v4: - rebase on 5.19-rc1 v3: - Declare revisions array as static - Change get_revision parameter to `unsigned int` - Add Paul's R-b tag - Add usage example - Sort includes v2: - https://lore.kernel.org/lkml/20220409173319.2491196-1-j.neuschaefer@gmx.net/ - Add R-b tag - rebase on 5.18-rc1 v1: - https://lore.kernel.org/lkml/20220129143316.2321460-1-j.neuschaefer@gmx.net/ --- drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/nuvoton/Kconfig | 11 +++ drivers/soc/nuvoton/Makefile | 2 + drivers/soc/nuvoton/wpcm450-soc.c | 109 ++++++++++++++++++++++++++++++ 5 files changed, 124 insertions(+) create mode 100644 drivers/soc/nuvoton/Kconfig create mode 100644 drivers/soc/nuvoton/Makefile create mode 100644 drivers/soc/nuvoton/wpcm450-soc.c -- 2.35.1 diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index 86ccf5970bc1b..cca3dfa5c6aea 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/pxa/Kconfig" source "drivers/soc/qcom/Kconfig" source "drivers/soc/renesas/Kconfig" diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 919716e0e7001..b9eb3c75e551a 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_SOC_XWAY) += lantiq/ obj-$(CONFIG_LITEX_SOC_CONTROLLER) += litex/ obj-y += mediatek/ obj-y += microchip/ +obj-y += nuvoton/ obj-y += pxa/ obj-y += amlogic/ obj-y += qcom/ diff --git a/drivers/soc/nuvoton/Kconfig b/drivers/soc/nuvoton/Kconfig new file mode 100644 index 0000000000000..df46182088ec2 --- /dev/null +++ b/drivers/soc/nuvoton/Kconfig @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 +menuconfig WPCM450_SOC + tristate "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) += wpcm450-soc.o diff --git a/drivers/soc/nuvoton/wpcm450-soc.c b/drivers/soc/nuvoton/wpcm450-soc.c new file mode 100644 index 0000000000000..c5e0d11c383b1 --- /dev/null +++ b/drivers/soc/nuvoton/wpcm450-soc.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton WPCM450 SoC Identification + * + * Copyright (C) 2022 Jonathan Neuschäfer + */ + +#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; +}; + +static const struct revision revisions[] __initconst = { + { 0x00, "Z1" }, + { 0x03, "Z2" }, + { 0x04, "Z21" }, + { 0x08, "A1" }, + { 0x09, "A2" }, + { 0x0a, "A3" }, + {} +}; + +static const char * __init get_revision(unsigned int rev) +{ + int i; + + for (i = 0; revisions[i].name; i++) + if (revisions[i].number == rev) + return revisions[i].name; + return NULL; +} + +static struct soc_device_attribute *wpcm450_attr; +static struct soc_device *wpcm450_soc; + +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 = syscon_regmap_lookup_by_compatible("nuvoton,wpcm450-gcr"); + if (IS_ERR(gcr)) + return PTR_ERR(gcr); + ret = regmap_read(gcr, GCR_PDID, &pdid); + if (ret) + return ret; + + if (PDID_CHIP(pdid) != CHIP_WPCM450) { + pr_warn("Unknown chip ID in GCR.PDID: 0x%06x\n", PDID_CHIP(pdid)); + return -ENODEV; + } + + revision = get_revision(PDID_REV(pdid)); + if (!revision) { + pr_warn("Unknown chip revision in GCR.PDID: 0x%02x\n", PDID_REV(pdid)); + return -ENODEV; + } + + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) + return -ENOMEM; + + attr->family = "Nuvoton NPCM"; + attr->soc_id = "WPCM450"; + attr->revision = revision; + soc = soc_device_register(attr); + if (IS_ERR(soc)) { + kfree(attr); + pr_warn("Could not register SoC device\n"); + return PTR_ERR(soc); + } + + wpcm450_soc = soc; + wpcm450_attr = attr; + return 0; +} +module_init(wpcm450_soc_init); + +static void __exit wpcm450_soc_exit(void) +{ + if (wpcm450_soc) { + soc_device_unregister(wpcm450_soc); + wpcm450_soc = NULL; + kfree(wpcm450_attr); + } +} +module_exit(wpcm450_soc_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jonathan Neuschäfer"); +MODULE_DESCRIPTION("Nuvoton WPCM450 SoC Identification driver");