From dc38ad4052a50b9e73fdcc970ecdd4f69ee9d97a Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 9 Dec 2010 23:12:46 +0800 Subject: ARM: mxs: Dynamically allocate duart devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Dynamically allocate duart devices for MX23 and MX28. Signed-off-by: Shawn Guo Signed-off-by: Uwe Kleine-König --- arch/arm/mach-mxs/devices.c | 75 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 arch/arm/mach-mxs/devices.c (limited to 'arch/arm/mach-mxs/devices.c') diff --git a/arch/arm/mach-mxs/devices.c b/arch/arm/mach-mxs/devices.c new file mode 100644 index 000000000000..6b60f02ca2e3 --- /dev/null +++ b/arch/arm/mach-mxs/devices.c @@ -0,0 +1,75 @@ +/* + * Copyright 2008 Sascha Hauer, kernel@pengutronix.de + * + * 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. + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include + +struct platform_device *__init mxs_add_platform_device_dmamask( + const char *name, int id, + const struct resource *res, unsigned int num_resources, + const void *data, size_t size_data, u64 dmamask) +{ + int ret = -ENOMEM; + struct platform_device *pdev; + + pdev = platform_device_alloc(name, id); + if (!pdev) + goto err; + + if (dmamask) { + /* + * This memory isn't freed when the device is put, + * I don't have a nice idea for that though. Conceptually + * dma_mask in struct device should not be a pointer. + * See http://thread.gmane.org/gmane.linux.kernel.pci/9081 + */ + pdev->dev.dma_mask = + kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL); + if (!pdev->dev.dma_mask) + /* ret is still -ENOMEM; */ + goto err; + + *pdev->dev.dma_mask = dmamask; + pdev->dev.coherent_dma_mask = dmamask; + } + + if (res) { + ret = platform_device_add_resources(pdev, res, num_resources); + if (ret) + goto err; + } + + if (data) { + ret = platform_device_add_data(pdev, data, size_data); + if (ret) + goto err; + } + + ret = platform_device_add(pdev); + if (ret) { +err: + platform_device_put(pdev); + return ERR_PTR(ret); + } + + return pdev; +} -- cgit v1.2.3