OMAP2+: DMA: hwmod: Device registration

Prepare OMAP2+ DMA to use hwmod infrastructure so that DMA can register
as platform device.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/dma.c b/arch/arm/mach-omap2/dma.c
new file mode 100644
index 000000000000..2130059e98cb
--- /dev/null
+++ b/arch/arm/mach-omap2/dma.c
@@ -0,0 +1,74 @@
+/*
+ * OMAP2+ DMA driver
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@nokia.com>
+ * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
+ * Graphics DMA and LCD DMA graphics tranformations
+ * by Imre Deak <imre.deak@nokia.com>
+ * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
+ * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Converted DMA library into platform driver
+ *      - G, Manjunath Kondaiah <manjugk@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
+#include <plat/dma.h>
+
+static struct omap_device_pm_latency omap2_dma_latency[] = {
+        {
+                .deactivate_func = omap_device_idle_hwmods,
+                .activate_func   = omap_device_enable_hwmods,
+                .flags           = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+        },
+};
+
+/* One time initializations */
+static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
+{
+        struct omap_device                      *od;
+        struct omap_system_dma_plat_info        *p;
+        char                                    *name = "omap_dma_system";
+
+        p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
+        if (!p) {
+                pr_err("%s: Unable to allocate pdata for %s:%s\n",
+                        __func__, name, oh->name);
+                return -ENOMEM;
+        }
+
+        od = omap_device_build(name, 0, oh, p, sizeof(*p),
+                        omap2_dma_latency, ARRAY_SIZE(omap2_dma_latency), 0);
+        kfree(p);
+        if (IS_ERR(od)) {
+                pr_err("%s: Cant build omap_device for %s:%s.\n",
+                        __func__, name, oh->name);
+                return IS_ERR(od);
+        }
+
+        return 0;
+}
+
+static int __init omap2_system_dma_init(void)
+{
+        return omap_hwmod_for_each_by_class("dma",
+                        omap2_system_dma_init_dev, NULL);
+}
+arch_initcall(omap2_system_dma_init);