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dma: edma: move device registration to platform code

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The horrible split between the low-level part of the edma support
and the dmaengine front-end driver causes problems on multiplatform
kernels. This is an attempt to improve the situation slightly
by only registering the dmaengine devices that are actually
present.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[olof: add missing include of linux/dma-mapping.h]
Signed-off-by: Olof Johansson <olof@lixom.net>

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Arnd Bergmann 2014-10-24 18:14:01 +02:00 committed by Olof Johansson
parent ab699bc792
commit 5305e4d674
2 changed files with 10 additions and 39 deletions
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9
arch/arm/common/edma.c
View File

@ -26,6 +26,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/edma.h>
#include <linux/dma-mapping.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_dma.h>
@ -1623,6 +1624,11 @@ static int edma_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
struct device *dev = &pdev->dev;
int ret;
struct platform_device_info edma_dev_info = {
.name = "edma-dma-engine",
.dma_mask = DMA_BIT_MASK(32),
.parent = &pdev->dev,
};
if (node) {
/* Check if this is a second instance registered */
@ -1793,6 +1799,9 @@ static int edma_probe(struct platform_device *pdev)
edma_write_array(j, EDMA_QRAE, i, 0x0);
}
arch_num_cc++;
edma_dev_info.id = j;
platform_device_register_full(&edma_dev_info);
}
return 0;

40
drivers/dma/edma.c
View File

@ -1107,52 +1107,14 @@ bool edma_filter_fn(struct dma_chan *chan, void *param)
}
EXPORT_SYMBOL(edma_filter_fn);
static struct platform_device *pdev0, *pdev1;
static const struct platform_device_info edma_dev_info0 = {
.name = "edma-dma-engine",
.id = 0,
.dma_mask = DMA_BIT_MASK(32),
};
static const struct platform_device_info edma_dev_info1 = {
.name = "edma-dma-engine",
.id = 1,
.dma_mask = DMA_BIT_MASK(32),
};
static int edma_init(void)
{
int ret = platform_driver_register(&edma_driver);
if (ret == 0) {
pdev0 = platform_device_register_full(&edma_dev_info0);
if (IS_ERR(pdev0)) {
platform_driver_unregister(&edma_driver);
ret = PTR_ERR(pdev0);
goto out;
}
}
if (!of_have_populated_dt() && EDMA_CTLRS == 2) {
pdev1 = platform_device_register_full(&edma_dev_info1);
if (IS_ERR(pdev1)) {
platform_driver_unregister(&edma_driver);
platform_device_unregister(pdev0);
ret = PTR_ERR(pdev1);
}
}
out:
return ret;
return platform_driver_register(&edma_driver);
}
subsys_initcall(edma_init);
static void __exit edma_exit(void)
{
platform_device_unregister(pdev0);
if (pdev1)
platform_device_unregister(pdev1);
platform_driver_unregister(&edma_driver);
}
module_exit(edma_exit);