mirror of https://gitee.com/openkylin/linux.git
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
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/*
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* OMAP2+ DMA driver
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*
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* Copyright (C) 2003 - 2008 Nokia Corporation
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* Author: Juha Yrjölä <juha.yrjola@nokia.com>
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* DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
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* Graphics DMA and LCD DMA graphics tranformations
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* by Imre Deak <imre.deak@nokia.com>
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* OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
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* Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
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*
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* Copyright (C) 2009 Texas Instruments
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* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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* Converted DMA library into platform driver
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* - G, Manjunath Kondaiah <manjugk@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <plat/omap_hwmod.h>
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#include <plat/omap_device.h>
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#include <plat/dma.h>
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static struct omap_device_pm_latency omap2_dma_latency[] = {
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{
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.deactivate_func = omap_device_idle_hwmods,
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.activate_func = omap_device_enable_hwmods,
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.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
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},
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};
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/* One time initializations */
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static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
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{
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struct omap_device *od;
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struct omap_system_dma_plat_info *p;
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char *name = "omap_dma_system";
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p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
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if (!p) {
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pr_err("%s: Unable to allocate pdata for %s:%s\n",
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__func__, name, oh->name);
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return -ENOMEM;
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}
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od = omap_device_build(name, 0, oh, p, sizeof(*p),
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omap2_dma_latency, ARRAY_SIZE(omap2_dma_latency), 0);
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kfree(p);
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if (IS_ERR(od)) {
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pr_err("%s: Cant build omap_device for %s:%s.\n",
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__func__, name, oh->name);
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return IS_ERR(od);
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}
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return 0;
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}
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static int __init omap2_system_dma_init(void)
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{
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return omap_hwmod_for_each_by_class("dma",
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omap2_system_dma_init_dev, NULL);
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}
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arch_initcall(omap2_system_dma_init);
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