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dmaengine: axi-dmac: move to device managed probe

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In axi_dmac_probe(), there's a mix in using device managed APIs and
explicitly cleaning things in the driver .remove() hook. Move to use
device managed APIs and thus drop the .remove() hook.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240328-axi-dmac-devm-probe-v3-2-523c0176df70@analog.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Nuno Sa 2024-03-28 14:58:51 +01:00 committed by Vinod Koul
parent 1bc3144420
commit 779a44831a
1 changed files with 34 additions and 44 deletions
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78
drivers/dma/dma-axi-dmac.c
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@ -1002,6 +1002,16 @@ static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version)
return 0;
}
static void axi_dmac_tasklet_kill(void *task)
{
tasklet_kill(task);
}
static void axi_dmac_free_dma_controller(void *of_node)
{
of_dma_controller_free(of_node);
}
static int axi_dmac_probe(struct platform_device *pdev)
{
struct dma_device *dma_dev;
@ -1025,14 +1035,10 @@ static int axi_dmac_probe(struct platform_device *pdev)
if (IS_ERR(dmac->base))
return PTR_ERR(dmac->base);
dmac->clk = devm_clk_get(&pdev->dev, NULL);
dmac->clk = devm_clk_get_enabled(&pdev->dev, NULL);
if (IS_ERR(dmac->clk))
return PTR_ERR(dmac->clk);
ret = clk_prepare_enable(dmac->clk);
if (ret < 0)
return ret;
version = axi_dmac_read(dmac, ADI_AXI_REG_VERSION);
if (version >= ADI_AXI_PCORE_VER(4, 3, 'a'))
@ -1041,7 +1047,7 @@ static int axi_dmac_probe(struct platform_device *pdev)
ret = axi_dmac_parse_dt(&pdev->dev, dmac);
if (ret < 0)
goto err_clk_disable;
return ret;
INIT_LIST_HEAD(&dmac->chan.active_descs);
@ -1072,7 +1078,7 @@ static int axi_dmac_probe(struct platform_device *pdev)
ret = axi_dmac_detect_caps(dmac, version);
if (ret)
goto err_clk_disable;
return ret;
dma_dev->copy_align = (dmac->chan.address_align_mask + 1);
@ -1088,57 +1094,42 @@ static int axi_dmac_probe(struct platform_device *pdev)
!AXI_DMAC_DST_COHERENT_GET(ret)) {
dev_err(dmac->dma_dev.dev,
"Coherent DMA not supported in hardware");
ret = -EINVAL;
goto err_clk_disable;
return -EINVAL;
}
}
ret = dma_async_device_register(dma_dev);
ret = dmaenginem_async_device_register(dma_dev);
if (ret)
goto err_clk_disable;
return ret;
/*
* Put the action in here so it get's done before unregistering the DMA
* device.
*/
ret = devm_add_action_or_reset(&pdev->dev, axi_dmac_tasklet_kill,
&dmac->chan.vchan.task);
if (ret)
return ret;
ret = of_dma_controller_register(pdev->dev.of_node,
of_dma_xlate_by_chan_id, dma_dev);
if (ret)
goto err_unregister_device;
return ret;
ret = request_irq(dmac->irq, axi_dmac_interrupt_handler, IRQF_SHARED,
dev_name(&pdev->dev), dmac);
ret = devm_add_action_or_reset(&pdev->dev, axi_dmac_free_dma_controller,
pdev->dev.of_node);
if (ret)
goto err_unregister_of;
return ret;
platform_set_drvdata(pdev, dmac);
ret = devm_request_irq(&pdev->dev, dmac->irq, axi_dmac_interrupt_handler,
IRQF_SHARED, dev_name(&pdev->dev), dmac);
if (ret)
return ret;
regmap = devm_regmap_init_mmio(&pdev->dev, dmac->base,
&axi_dmac_regmap_config);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
goto err_free_irq;
}
return 0;
err_free_irq:
free_irq(dmac->irq, dmac);
err_unregister_of:
of_dma_controller_free(pdev->dev.of_node);
err_unregister_device:
dma_async_device_unregister(&dmac->dma_dev);
err_clk_disable:
clk_disable_unprepare(dmac->clk);
return ret;
}
static void axi_dmac_remove(struct platform_device *pdev)
{
struct axi_dmac *dmac = platform_get_drvdata(pdev);
free_irq(dmac->irq, dmac);
of_dma_controller_free(pdev->dev.of_node);
tasklet_kill(&dmac->chan.vchan.task);
dma_async_device_unregister(&dmac->dma_dev);
clk_disable_unprepare(dmac->clk);
return PTR_ERR_OR_ZERO(regmap);
}
static const struct of_device_id axi_dmac_of_match_table[] = {
@ -1153,7 +1144,6 @@ static struct platform_driver axi_dmac_driver = {
.of_match_table = axi_dmac_of_match_table,
},
.probe = axi_dmac_probe,
.remove_new = axi_dmac_remove,
};
module_platform_driver(axi_dmac_driver);