From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 40B7EC43381 for ; Tue, 19 Feb 2019 06:36:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11D7121848 for ; Tue, 19 Feb 2019 06:36:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="x+MhAm/8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727064AbfBSGgI (ORCPT ); Tue, 19 Feb 2019 01:36:08 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:54938 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725765AbfBSGgG (ORCPT ); Tue, 19 Feb 2019 01:36:06 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id x1J6ZkZW106310; Tue, 19 Feb 2019 00:35:46 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1550558146; bh=ar9/zidlSzMeE+mIPajTlV0BwC8y9cYI3NC9lb7nhHs=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=x+MhAm/8UkEJ2H7sGQVITRCnI1ZDUWrX9SduTFxFxLZjVUZ/R9ibZPCado6QyA1SA 3EZaiEB7DtFn4DUCGAF8NzHv4uSxnSr3OlIG8meRhBcvMpj7txVJCzqvFXfZy92du+ oq7cZwnhPyvR27Wd9HwKYppwoRgNvT1Bp7DHMrpY= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x1J6ZkGL123565 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 19 Feb 2019 00:35:46 -0600 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Tue, 19 Feb 2019 00:35:45 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Tue, 19 Feb 2019 00:35:45 -0600 Received: from a0132425.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id x1J6ZCt3025516; Tue, 19 Feb 2019 00:35:40 -0600 From: Vignesh R To: Vignesh R , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Rob Herring CC: Greg Kroah-Hartman , Arnd Bergmann , , , , , , Subject: [RFC PATCH 5/5] mtd: hyperbus: Add driver for TI's Hyperbus memory controller Date: Tue, 19 Feb 2019 12:06:07 +0530 Message-ID: <20190219063607.29949-6-vigneshr@ti.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190219063607.29949-1-vigneshr@ti.com> References: <20190219063607.29949-1-vigneshr@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add driver for Hyperbus memory controller on TI's AM654 SoC. Programming IP is pretty simple and provides direct memory mapped access to connected Flash devices. Add basic support for the IP without DMA. Second ChipSelect is not supported for now. Signed-off-by: Vignesh R --- drivers/mtd/hyperbus/hbmc_am654.c | 105 ++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 drivers/mtd/hyperbus/hbmc_am654.c diff --git a/drivers/mtd/hyperbus/hbmc_am654.c b/drivers/mtd/hyperbus/hbmc_am654.c new file mode 100644 index 000000000000..1f0d2dc52f9f --- /dev/null +++ b/drivers/mtd/hyperbus/hbmc_am654.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ +// Author: Vignesh R + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct am654_hbmc_priv { + struct hb_device hbdev; + void __iomem *regbase; +}; + +static int am654_hbmc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct am654_hbmc_priv *priv; + struct resource *res; + int err; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (IS_ERR(res)) { + dev_err(&pdev->dev, "failed to get memory resource\n"); + return -ENOENT; + } + + priv->regbase = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->regbase)) { + dev_err(dev, "Cannot remap controller address.\n"); + return PTR_ERR(priv->regbase); + } + + pm_runtime_enable(&pdev->dev); + err = pm_runtime_get_sync(&pdev->dev); + if (err < 0) { + pm_runtime_put_noidle(&pdev->dev); + return err; + } + + priv->hbdev.needs_calib = true; + priv->hbdev.dev = &pdev->dev; + priv->hbdev.np = of_get_next_child(dev->of_node, NULL); + err = hb_register_device(&priv->hbdev); + if (err) { + dev_err(&pdev->dev, "failed to register controller\n"); + goto err_destroy; + } + + return 0; + +err_destroy: + hb_unregister_device(&priv->hbdev); + pm_runtime_put_sync(&pdev->dev); + return err; +} + +static int am654_hbmc_remove(struct platform_device *pdev) +{ + struct am654_hbmc_priv *priv = platform_get_drvdata(pdev); + int ret; + + ret = hb_unregister_device(&priv->hbdev); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static const struct of_device_id am654_hbmc_dt_ids[] = { + { + .compatible = "ti,am654-hbmc", + }, + { /* end of table */ } +}; + +MODULE_DEVICE_TABLE(of, am654_hbmc_dt_ids); + +static struct platform_driver am654_hbmc_platform_driver = { + .probe = am654_hbmc_probe, + .remove = am654_hbmc_remove, + .driver = { + .name = "hbmc-am654", + .of_match_table = am654_hbmc_dt_ids, + }, +}; + +module_platform_driver(am654_hbmc_platform_driver); + +MODULE_DESCRIPTION("HBMC driver for AM654 SoC"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:hbmc-am654"); +MODULE_AUTHOR("Vignesh R "); -- 2.20.1