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=-9.1 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,URIBL_BLOCKED,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 59962C43381 for ; Thu, 21 Mar 2019 17:45:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2280B2190A for ; Thu, 21 Mar 2019 17:45:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="HTYcrrvG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728822AbfCURp5 (ORCPT ); Thu, 21 Mar 2019 13:45:57 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:50054 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728766AbfCURpy (ORCPT ); Thu, 21 Mar 2019 13:45:54 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id x2LHjLQF124779; Thu, 21 Mar 2019 12:45:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1553190321; bh=VCFswOP9m176b3VL5yVpVFWVJnFKwvHaDa1u6d0m3Yc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=HTYcrrvGoXNDu1xs22CGcVrRP5DJBaT9zUtrR9uk79M4ul1/lhEufg4/2TRV/1ar/ Z0oOgQ1vYuuDI67fPODfh/p6pMAMLc23HRRCBJfQyj3dBOCTedlU3oW2JctUDjl+bO DzQfRTayU80bG5vh5zZNuUbrDl20qAIGA3zdSDGI= Received: from DFLE110.ent.ti.com (dfle110.ent.ti.com [10.64.6.31]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x2LHjLLY006279 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 21 Mar 2019 12:45:21 -0500 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Thu, 21 Mar 2019 12:45:21 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5 via Frontend Transport; Thu, 21 Mar 2019 12:45:21 -0500 Received: from a0132425.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id x2LHiq2Z018392; Thu, 21 Mar 2019 12:45:16 -0500 From: Vignesh Raghavendra To: Vignesh R , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Rob Herring CC: Greg Kroah-Hartman , Arnd Bergmann , , , , , , , Mason Yang , Sergei Shtylyov Subject: [RFC PATCH v2 5/5] mtd: hyperbus: Add driver for TI's Hyperbus memory controller Date: Thu, 21 Mar 2019 23:15:48 +0530 Message-ID: <20190321174548.9288-6-vigneshr@ti.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190321174548.9288-1-vigneshr@ti.com> References: <20190321174548.9288-1-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 Raghavendra --- drivers/mtd/hyperbus/Kconfig | 10 +++ drivers/mtd/hyperbus/Makefile | 1 + drivers/mtd/hyperbus/hbmc_am654.c | 108 ++++++++++++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 drivers/mtd/hyperbus/hbmc_am654.c diff --git a/drivers/mtd/hyperbus/Kconfig b/drivers/mtd/hyperbus/Kconfig index febbb4cdc25f..4e026eb0f045 100644 --- a/drivers/mtd/hyperbus/Kconfig +++ b/drivers/mtd/hyperbus/Kconfig @@ -9,3 +9,13 @@ menuconfig MTD_HYPERBUS the Hyperbus Controller driver to communicate with Hyperflash. See Cypress Hyperbus specification for more details + +if MTD_HYPERBUS + +config HBMC_AM654 + tristate "Hyperbus controller driver for AM65x SoC" + help + This is the driver for Hyperbus controller on TI's AM65x and + other SoCs + +endif # MTD_HYPERBUS diff --git a/drivers/mtd/hyperbus/Makefile b/drivers/mtd/hyperbus/Makefile index ca61dedd730d..24abd1d43ade 100644 --- a/drivers/mtd/hyperbus/Makefile +++ b/drivers/mtd/hyperbus/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_MTD_HYPERBUS) += hyperbus-core.o +obj-$(CONFIG_HBMC_AM654) += hbmc_am654.o diff --git a/drivers/mtd/hyperbus/hbmc_am654.c b/drivers/mtd/hyperbus/hbmc_am654.c new file mode 100644 index 000000000000..abf2b0959a35 --- /dev/null +++ b/drivers/mtd/hyperbus/hbmc_am654.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ +// Author: Vignesh Raghavendra + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct am654_hbmc_priv { + struct hyperbus_ctlr ctlr; + struct hyperbus_device hbdev; + void __iomem *regbase; +}; + +static const struct hyperbus_ops am654_hbmc_ops = { + .calibrate = hyperbus_calibrate, +}; + +static int am654_hbmc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct am654_hbmc_priv *priv; + struct resource *res; + int ret; + + 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 (!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)) + return PTR_ERR(priv->regbase); + + pm_runtime_enable(&pdev->dev); + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) { + pm_runtime_put_noidle(&pdev->dev); + goto disable_pm; + } + + priv->ctlr.dev = &pdev->dev; + priv->ctlr.ops = &am654_hbmc_ops; + priv->hbdev.ctlr = &priv->ctlr; + priv->hbdev.np = of_get_next_child(dev->of_node, NULL); + ret = hyperbus_register_device(&priv->hbdev); + if (ret) { + dev_err(&pdev->dev, "failed to register controller\n"); + pm_runtime_put_sync(&pdev->dev); + goto disable_pm; + } + + return 0; +disable_pm: + pm_runtime_disable(&pdev->dev); + return ret; +} + +static int am654_hbmc_remove(struct platform_device *pdev) +{ + struct am654_hbmc_priv *priv = platform_get_drvdata(pdev); + int ret; + + ret = hyperbus_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 Raghavendra "); -- 2.21.0