From patchwork Fri Mar 11 08:59:31 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sanchayan X-Patchwork-Id: 8563601 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D2E30C0553 for ; Fri, 11 Mar 2016 09:07:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B1D5E20211 for ; Fri, 11 Mar 2016 09:07:55 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9418020268 for ; Fri, 11 Mar 2016 09:07:54 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aeJ1j-0007kE-AU; Fri, 11 Mar 2016 09:06:31 +0000 Received: from mail-pa0-x231.google.com ([2607:f8b0:400e:c03::231]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aeJ18-0007OY-DO for linux-arm-kernel@lists.infradead.org; Fri, 11 Mar 2016 09:05:57 +0000 Received: by mail-pa0-x231.google.com with SMTP id td3so64291466pab.2 for ; Fri, 11 Mar 2016 01:05:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=QpCtPOTmAH9bFwCjXxgpB2VcREXyetHXIpAehPmCm9s=; b=npWwsjA0nO0ue86UnxqQ0ScAqmvPbsLXPw+3ZznnPKVGNhGgmLPQybufD45+XxRVQ6 IhfSYmpcXrpbotggs+VYVE9v/GoRGyW/BpHv/iSywIgxEyltZqskmMygnGyY+tEBbzAi sayjY+3g9z4BOFsA9DWr3ygjjJdTvIuF9vDsvAvi5xCxcb6fYFGU4ImgZplXBM65XACn P/kLbfYVnyl2gP0J/30O8/KBKXyfkB/uC7n6HfQLRHn/aeZC2t5yXYXdZ4F6NfDCGa4k XXkeed3ji40G00BhEfIeBtRpitbIrCmqW0Ayt7AoUXoBU9Lko8SUeWFdk/V1ZwGp0Y9q MEKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=QpCtPOTmAH9bFwCjXxgpB2VcREXyetHXIpAehPmCm9s=; b=eRSBiK9QsqOb56kWEgjKS/brKdYT8mAqZVoLbQa06///ro6F0Dwi+gcrtfqvdsV5Xg plB9opDp7yaJ+4tQdfN+NRACPfc+a4b80Kl5ab3ofxv7lFDdALPD68ZI/DD6R3nFcj2f +lR5zBaMAO/d27BAf4BkzUWnJ4iwTCImdRMMszph7u2+04v2O4nqDc35IzlEbmQR7u3A A8RSz0b2LBwqU0o+n6mtg8hGCtkAM6u3rSfXNUgyNSCaPY6xvEqCTuu2RrTVhcbGuyw5 pZQ/sASlp+BVGMf8wgaJ4hRWQCvUgD2JSaPpffVD2Y2GnJYTqwCiEB8uIZaceXYn3APO zVVA== X-Gm-Message-State: AD7BkJIHQnOfAA+2s99trOsSZInxaBYF7g5x2SyQeOhN28aADR9VDzQIKSsr19MsxgXGiw== X-Received: by 10.66.193.226 with SMTP id hr2mr12885915pac.20.1457687137076; Fri, 11 Mar 2016 01:05:37 -0800 (PST) Received: from localhost ([115.115.225.206]) by smtp.gmail.com with ESMTPSA id 85sm11164638pfl.18.2016.03.11.01.05.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 11 Mar 2016 01:05:36 -0800 (PST) From: Sanchayan Maity To: arnd@arndb.de, shawnguo@kernel.org Subject: [PATCH v1 4/4] soc: Add SoC bus driver for Freescale Vybrid Platform Date: Fri, 11 Mar 2016 14:29:31 +0530 Message-Id: X-Mailer: git-send-email 2.7.2 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160311_010554_702042_EE61F9D4 X-CRM114-Status: GOOD ( 20.91 ) X-Spam-Score: -2.7 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, stefan@agner.ch, Sanchayan Maity , robh+dt@kernel.org, lee.jones@linaro.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds a SoC driver to be used by Freescale Vybrid SoC's. Driver utilises syscon and nvmem consumer API's to get the various register values needed and sysfs exposes the SoC specific properties. A sample output from Colibri Vybrid VF61 is below: root@colibri-vf:~# cd /sys/bus/soc/devices/soc0 root@colibri-vf:/sys/bus/soc/devices/soc0# ls family machine power revision soc_id subsystem uevent root@colibri-vf:/sys/bus/soc/devices/soc0# cat family Freescale Vybrid VF610 root@colibri-vf:/sys/bus/soc/devices/soc0# cat machine Freescale Vybrid root@colibri-vf:/sys/bus/soc/devices/soc0# cat revision 00000013 root@colibri-vf:/sys/bus/soc/devices/soc0# cat soc_id df6472a6130f29d4 Signed-off-by: Sanchayan Maity --- drivers/soc/Kconfig | 1 + drivers/soc/fsl/Kconfig | 10 +++ drivers/soc/fsl/Makefile | 1 + drivers/soc/fsl/soc-vf610.c | 160 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 172 insertions(+) create mode 100644 drivers/soc/fsl/Kconfig create mode 100644 drivers/soc/fsl/soc-vf610.c diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index 8826020..f84ba63 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -2,6 +2,7 @@ menu "SOC (System On Chip) specific Drivers" source "drivers/soc/bcm/Kconfig" source "drivers/soc/brcmstb/Kconfig" +source "drivers/soc/fsl/Kconfig" source "drivers/soc/fsl/qe/Kconfig" source "drivers/soc/mediatek/Kconfig" source "drivers/soc/qcom/Kconfig" diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig new file mode 100644 index 0000000..029ea17 --- /dev/null +++ b/drivers/soc/fsl/Kconfig @@ -0,0 +1,10 @@ +# +# Freescale SoC drivers + +config SOC_BUS_VF610 + bool "SoC bus device for the Freescale Vybrid platform" + depends on NVMEM && NVMEM_VF610_OCOTP + select SOC_BUS + help + Include support for the SoC bus on the Freescale Vybrid platform + providing sysfs information about the module variant. diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile index 203307f..afaf092 100644 --- a/drivers/soc/fsl/Makefile +++ b/drivers/soc/fsl/Makefile @@ -2,5 +2,6 @@ # Makefile for the Linux Kernel SOC fsl specific device drivers # +obj-$(CONFIG_SOC_VF610) += soc-vf610.o obj-$(CONFIG_QUICC_ENGINE) += qe/ obj-$(CONFIG_CPM) += qe/ diff --git a/drivers/soc/fsl/soc-vf610.c b/drivers/soc/fsl/soc-vf610.c new file mode 100644 index 0000000..99bf641 --- /dev/null +++ b/drivers/soc/fsl/soc-vf610.c @@ -0,0 +1,160 @@ +/* + * Copyright (C) 2016 Toradex AG. + * + * Author: Sanchayan Maity + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct vf610_soc { + struct device *dev; + struct soc_device_attribute *soc_dev_attr; + struct soc_device *soc_dev; + struct nvmem_cell *ocotp_cfg0; + struct nvmem_cell *ocotp_cfg1; +}; + +static int vf610_soc_probe(struct platform_device *pdev) +{ + struct vf610_soc *info; + struct device *dev = &pdev->dev; + struct device_node *soc_node; + char soc_type[] = "xx0"; + size_t id1_len; + size_t id2_len; + u32 cpucount; + u32 l2size; + u32 rom_rev; + u8 *socid1; + u8 *socid2; + int ret; + + info = devm_kzalloc(dev, sizeof(struct vf610_soc), GFP_KERNEL); + if (!info) + return -ENOMEM; + info->dev = dev; + + info->ocotp_cfg0 = devm_nvmem_cell_get(dev, "cfg0"); + if (IS_ERR(info->ocotp_cfg0)) + return -EPROBE_DEFER; + + info->ocotp_cfg1 = devm_nvmem_cell_get(dev, "cfg1"); + if (IS_ERR(info->ocotp_cfg1)) + return -EPROBE_DEFER; + + socid1 = nvmem_cell_read(info->ocotp_cfg0, &id1_len); + if (IS_ERR(socid1)) { + dev_err(dev, "Could not read nvmem cell %ld\n", + PTR_ERR(socid1)); + return PTR_ERR(socid1); + } + + socid2 = nvmem_cell_read(info->ocotp_cfg1, &id2_len); + if (IS_ERR(socid2)) { + dev_err(dev, "Could not read nvmem cell %ld\n", + PTR_ERR(socid2)); + return PTR_ERR(socid2); + } + add_device_randomness(socid1, id1_len); + add_device_randomness(socid2, id2_len); + + soc_node = of_find_node_by_path("/soc"); + if (soc_node == NULL) + return -ENODEV; + + ret = syscon_regmap_read_from_offset(soc_node, + "fsl,rom-revision", &rom_rev); + if (ret) { + of_node_put(soc_node); + return ret; + } + + ret = syscon_regmap_read_from_offset(soc_node, + "fsl,cpu-count", &cpucount); + if (ret) { + of_node_put(soc_node); + return ret; + } + + ret = syscon_regmap_read_from_offset(soc_node, + "fsl,l2-size", &l2size); + if (ret) { + of_node_put(soc_node); + return ret; + } + + of_node_put(soc_node); + + soc_type[0] = cpucount ? '6' : '5'; /* Dual Core => VF6x0 */ + soc_type[1] = l2size ? '1' : '0'; /* L2 Cache => VFx10 */ + + info->soc_dev_attr = devm_kzalloc(dev, + sizeof(info->soc_dev_attr), GFP_KERNEL); + if (!info->soc_dev_attr) + return -ENOMEM; + + info->soc_dev_attr->machine = devm_kasprintf(dev, + GFP_KERNEL, "Freescale Vybrid"); + info->soc_dev_attr->soc_id = devm_kasprintf(dev, + GFP_KERNEL, + "%02x%02x%02x%02x%02x%02x%02x%02x", + socid1[3], socid1[2], socid1[1], + socid1[0], socid2[3], socid2[2], + socid2[1], socid2[0]); + info->soc_dev_attr->family = devm_kasprintf(&pdev->dev, + GFP_KERNEL, "Freescale Vybrid VF%s", + soc_type); + info->soc_dev_attr->revision = devm_kasprintf(dev, + GFP_KERNEL, "%08x", rom_rev); + + platform_set_drvdata(pdev, info); + + info->soc_dev = soc_device_register(info->soc_dev_attr); + if (IS_ERR(info->soc_dev)) + return -ENODEV; + + return 0; +} + +static int vf610_soc_remove(struct platform_device *pdev) +{ + struct vf610_soc *info = platform_get_drvdata(pdev); + + if (info->soc_dev) + soc_device_unregister(info->soc_dev); + + return 0; +} + +static const struct of_device_id vf610_soc_bus_match[] = { + { .compatible = "fsl,vf610-soc-bus", }, + { /* */ } +}; + +static struct platform_driver vf610_soc_driver = { + .probe = vf610_soc_probe, + .remove = vf610_soc_remove, + .driver = { + .name = "vf610-soc-bus", + .of_match_table = vf610_soc_bus_match, + }, +}; +builtin_platform_driver(vf610_soc_driver); -- 2.7.2