diff options
| author | Vignesh Raman <Vignesh_Raman@mentor.com> | 2014-08-05 18:39:41 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-08-19 20:52:04 +0530 |
| commit | 23e11811378259831777e8fdc8b9836faeaa72cd (patch) | |
| tree | ce63996c49211c5a15a4bf277bfd0c41e6c67d52 | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
| download | linux-23e11811378259831777e8fdc8b9836faeaa72cd.tar.bz2 | |
dma: imx-sdma: use module_platform_driver for SDMA driver
Currently there is no module_exit declared in SDMA driver, so that once
sdma module is inserted, it's shown with permanent attribute by lsmod,
and it can't be removed.
Use module_platform_driver to register/unregister SDMA driver and modify
SDMA's remove operation, to make SDMA driver possible to be removed.
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | drivers/dma/imx-sdma.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index f7626e37d0b8..40e65a4df94d 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1603,6 +1603,8 @@ static int __init sdma_probe(struct platform_device *pdev) sdma->dma_device.dev->dma_parms = &sdma->dma_parms; dma_set_max_seg_size(sdma->dma_device.dev, 65535); + platform_set_drvdata(pdev, sdma); + ret = dma_async_device_register(&sdma->dma_device); if (ret) { dev_err(&pdev->dev, "unable to register\n"); @@ -1640,7 +1642,20 @@ err_irq: static int sdma_remove(struct platform_device *pdev) { - return -EBUSY; + struct sdma_engine *sdma = platform_get_drvdata(pdev); + struct resource *iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); + int irq = platform_get_irq(pdev, 0); + + dma_async_device_unregister(&sdma->dma_device); + kfree(sdma->script_addrs); + free_irq(irq, sdma); + iounmap(sdma->regs); + release_mem_region(iores->start, resource_size(iores)); + kfree(sdma); + + platform_set_drvdata(pdev, NULL); + dev_info(&pdev->dev, "Removed...\n"); + return 0; } static struct platform_driver sdma_driver = { @@ -1650,13 +1665,10 @@ static struct platform_driver sdma_driver = { }, .id_table = sdma_devtypes, .remove = sdma_remove, + .probe = sdma_probe, }; -static int __init sdma_module_init(void) -{ - return platform_driver_probe(&sdma_driver, sdma_probe); -} -module_init(sdma_module_init); +module_platform_driver(sdma_driver); MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>"); MODULE_DESCRIPTION("i.MX SDMA driver"); |