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 D65FFC10F0E for ; Fri, 12 Apr 2019 09:30:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AE81205F4 for ; Fri, 12 Apr 2019 09:30:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="X9Jd+VWP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726795AbfDLJaV (ORCPT ); Fri, 12 Apr 2019 05:30:21 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:40036 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726678AbfDLJaV (ORCPT ); Fri, 12 Apr 2019 05:30:21 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x3C9TIJk043599; Fri, 12 Apr 2019 04:29:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1555061358; bh=SOs+/lKbDYt47rJCWasS94Bi1lRmC3XqCD8X2v2hPkE=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=X9Jd+VWPNoegTB/l2Fkd2Jp1vqvOdBaed35rGOt+Jnd3qedytgtK6Dwl1y+BTu7hq YqipMNs9f7+uUX6HAxOF0gmRDfR8TnMWJ/NjmoW3qKZbsPkJYkKwdqdTjLCfMokJBa 9KdZCw+2XHB0s5mWveNH1vjYtkm8x3wIMdjWVnxs= Received: from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x3C9TI9W020768 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 12 Apr 2019 04:29:18 -0500 Received: from DFLE106.ent.ti.com (10.64.6.27) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Fri, 12 Apr 2019 04:29:18 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE106.ent.ti.com (10.64.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Fri, 12 Apr 2019 04:29:18 -0500 Received: from a0132425.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x3C9SWmI093202; Fri, 12 Apr 2019 04:29:12 -0500 From: Vignesh Raghavendra To: Vignesh Raghavendra , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Rob Herring CC: , Tudor Ambarus , Miquel Raynal , Joakim Tjernlund , , Sergei Shtylyov , Mason Yang , , , Subject: [PATCH v3 5/5] mtd: hyperbus: Add driver for TI's HyperBus memory controller Date: Fri, 12 Apr 2019 14:59:23 +0530 Message-ID: <20190412092923.24919-6-vigneshr@ti.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190412092923.24919-1-vigneshr@ti.com> References: <20190412092923.24919-1-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 | 12 ++++ drivers/mtd/hyperbus/Makefile | 1 + drivers/mtd/hyperbus/hbmc-am654.c | 115 ++++++++++++++++++++++++++++++ 3 files changed, 128 insertions(+) create mode 100644 drivers/mtd/hyperbus/hbmc-am654.c diff --git a/drivers/mtd/hyperbus/Kconfig b/drivers/mtd/hyperbus/Kconfig index 98147e28caa0..cff6bbd226f5 100644 --- a/drivers/mtd/hyperbus/Kconfig +++ b/drivers/mtd/hyperbus/Kconfig @@ -9,3 +9,15 @@ 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" + select MULTIPLEXER + select MUX_MMIO + 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..8a936e066f48 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..f458d7226df9 --- /dev/null +++ b/drivers/mtd/hyperbus/hbmc-am654.c @@ -0,0 +1,115 @@ +// 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 +#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; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + priv->regbase = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->regbase)) + return PTR_ERR(priv->regbase); + + if (of_property_read_bool(dev->of_node, "mux-controls")) { + struct mux_control *control = devm_mux_control_get(dev, NULL); + + if (IS_ERR(control)) + return PTR_ERR(control); + + ret = mux_control_select(control, 1); + if (ret) { + dev_err(dev, "Failed to select HBMC mux\n"); + return ret; + } + } + + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + pm_runtime_put_noidle(dev); + goto disable_pm; + } + + priv->ctlr.dev = 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(dev, "failed to register controller\n"); + pm_runtime_put_sync(&pdev->dev); + goto disable_pm; + } + + return 0; +disable_pm: + pm_runtime_disable(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