Prepare OMAP2+ DMA to use hwmod infrastructure so that DMA can register as platform device. Signed-off-by: G, Manjunath Kondaiah <manjugk@xxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> Cc: Tony Lindgren <tony@xxxxxxxxxxx> Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx> Cc: Benoit Cousson <b-cousson@xxxxxx> --- arch/arm/mach-omap2/dma.c | 74 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 74 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-omap2/dma.c diff --git a/arch/arm/mach-omap2/dma.c b/arch/arm/mach-omap2/dma.c new file mode 100644 index 0000000..e2c897a --- /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@xxxxxxxxx> + * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@xxxxxxxxx> + * Graphics DMA and LCD DMA graphics tranformations + * by Imre Deak <imre.deak@xxxxxxxxx> + * 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@xxxxxx> + * + * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ + * Converted DMA library into platform driver + * - G, Manjunath Kondaiah <manjugk@xxxxxx> + * + * 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); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
