From patchwork Wed Jul 18 06:30:38 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 1208841 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 126373FCFC for ; Wed, 18 Jul 2012 06:32:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752456Ab2GRGcB (ORCPT ); Wed, 18 Jul 2012 02:32:01 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:54907 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751871Ab2GRGbZ (ORCPT ); Wed, 18 Jul 2012 02:31:25 -0400 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id q6I6Uw8x024316; Wed, 18 Jul 2012 01:30:59 -0500 Received: from DBDE70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id q6I6Upul005222; Wed, 18 Jul 2012 12:00:52 +0530 (IST) Received: from dbdp32.itg.ti.com (172.24.170.251) by dbde70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 14.1.323.3; Wed, 18 Jul 2012 12:00:51 +0530 Received: from a0393678lt.apr.dhcp.ti.com (smtpvbd.itg.ti.com [172.24.170.250]) by dbdp32.itg.ti.com (8.13.8/8.13.8) with ESMTP id q6I6Uem0013255; Wed, 18 Jul 2012 12:00:51 +0530 From: Kishon Vijay Abraham I To: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 1/2] drivers: bus: add a new driver for omap-ocp2scp Date: Wed, 18 Jul 2012 12:00:38 +0530 Message-ID: <1342593039-7728-2-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1342593039-7728-1-git-send-email-kishon@ti.com> References: <1342593039-7728-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Adds a new driver *omap-ocp2scp*. This driver takes the responsibility of creating all the devices that is connected to OCP2SCP. In the case of OMAP4, USB2PHY is connected to ocp2scp. This also includes device tree support for ocp2scp driver and the documentation with device tree binding information is updated. Cc: Felipe Balbi Acked-by: Arnd Bergmann Signed-off-by: Kishon Vijay Abraham I Acked-by: Felipe Balbi --- .../devicetree/bindings/bus/omap-ocp2scp.txt | 10 ++ drivers/Kconfig | 2 + drivers/Makefile | 2 + drivers/bus/Kconfig | 15 +++ drivers/bus/Makefile | 5 + drivers/bus/omap-ocp2scp.c | 98 ++++++++++++++++++++ 6 files changed, 132 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/bus/omap-ocp2scp.txt create mode 100644 drivers/bus/Kconfig create mode 100644 drivers/bus/Makefile create mode 100644 drivers/bus/omap-ocp2scp.c diff --git a/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt b/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt new file mode 100644 index 0000000..d2fe064 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/omap-ocp2scp.txt @@ -0,0 +1,10 @@ +* OMAP OCP2SCP - ocp interface to scp interface + +properties: +- compatible : Should be "ti,omap-ocp2scp" +- #address-cells, #size-cells : Must be present if the device has sub-nodes +- ranges : the child address space are mapped 1:1 onto the parent address space +- ti,hwmods : must be "ocp2scp_usb_phy" + +Sub-nodes: +All the devices connected to ocp2scp are described using sub-node to ocp2scp diff --git a/drivers/Kconfig b/drivers/Kconfig index bfc9186..4fe1e4c 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -2,6 +2,8 @@ menu "Device Drivers" source "drivers/base/Kconfig" +source "drivers/bus/Kconfig" + source "drivers/connector/Kconfig" source "drivers/mtd/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index 2ba29ff..cac3819 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -5,6 +5,8 @@ # Rewritten to use lists instead of if-statements. # +obj-y += bus/ + # GPIO must come after pinctrl as gpios may need to mux pins etc obj-y += pinctrl/ obj-y += gpio/ diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig new file mode 100644 index 0000000..6270415 --- /dev/null +++ b/drivers/bus/Kconfig @@ -0,0 +1,15 @@ +# +# Bus Devices +# + +menu "Bus devices" + +config OMAP_OCP2SCP + tristate "OMAP OCP2SCP DRIVER" + help + Driver to enable ocp2scp module which transforms ocp interface + protocol to scp protocol. In OMAP4, USB PHY is connected via + OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via + OCP2SCP. + +endmenu diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile new file mode 100644 index 0000000..0ec50bc --- /dev/null +++ b/drivers/bus/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the bus drivers. +# + +obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c new file mode 100644 index 0000000..8c3db3a --- /dev/null +++ b/drivers/bus/omap-ocp2scp.c @@ -0,0 +1,98 @@ +/* + * omap-ocp2scp.c - transform ocp interface protocol to scp protocol + * + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I + * + * 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 + +static int ocp2scp_remove_devices(struct device *dev, void *c) +{ + struct platform_device *pdev = to_platform_device(dev); + + platform_device_unregister(pdev); + + return 0; +} + +static int __devinit omap_ocp2scp_probe(struct platform_device *pdev) +{ + int ret; + struct device_node *np = pdev->dev.of_node; + + if (np) { + ret = of_platform_populate(np, NULL, NULL, &pdev->dev); + if (ret) { + dev_err(&pdev->dev, "failed to add resources for ocp2scp child\n"); + goto err0; + } + } + pm_runtime_enable(&pdev->dev); + + return 0; + +err0: + device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); + + return ret; +} + +static int __devexit omap_ocp2scp_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id omap_ocp2scp_id_table[] = { + { .compatible = "ti,omap-ocp2scp" }, + {} +}; +MODULE_DEVICE_TABLE(of, omap_usb2_id_table); +#endif + +static struct platform_driver omap_ocp2scp_driver = { + .probe = omap_ocp2scp_probe, + .remove = __devexit_p(omap_ocp2scp_remove), + .driver = { + .name = "omap-ocp2scp", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(omap_ocp2scp_id_table), + }, +}; + +static int __init omap_ocp2scp_init(void) +{ + return platform_driver_register(&omap_ocp2scp_driver); +} +arch_initcall(omap_ocp2scp_init); + +static void __exit omap_ocp2scp_exit(void) +{ + platform_driver_unregister(&omap_ocp2scp_driver); +} +module_exit(omap_ocp2scp_exit); + +MODULE_ALIAS("platform: omap-ocp2scp"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("OMAP OCP2SCP DRIVER"); +MODULE_LICENSE("GPLv2");