| Message ID | YIrAJce3Ej8hNbkA@orolia.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v4,1/2] dt-bindings: dma: add schema for altr,msgdma | expand |
On 29-04-21, 16:18, Olivier Dautricourt wrote: > This driver had no device tree support. > > - add compatible field "altr,msgdma" > - define msgdma_of_xlate, with no argument > - register dma controller with of_dma_controller_register > > Signed-off-by: Olivier Dautricourt <olivier.dautricourt@orolia.com> > --- > > Notes: > Changes in v2: > none > > Changes from v2 to v3: > Removed CONFIG_OF #ifdef's and use if (IS_ENABLED(CONFIG_OF)) > only once. > > Changes from v3 to v4 > Reintroduce #ifdef CONFIG_OF for msgdma_match > as it produces a unused variable warning > > drivers/dma/altera-msgdma.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c > index 9a841ce5f0c5..7e58385facef 100644 > --- a/drivers/dma/altera-msgdma.c > +++ b/drivers/dma/altera-msgdma.c > @@ -19,6 +19,7 @@ > #include <linux/module.h> > #include <linux/platform_device.h> > #include <linux/slab.h> > +#include <linux/of_dma.h> > > #include "dmaengine.h" > > @@ -784,6 +785,14 @@ static int request_and_map(struct platform_device *pdev, const char *name, > return 0; > } > > +static struct dma_chan *msgdma_of_xlate(struct of_phandle_args *dma_spec, > + struct of_dma *ofdma) > +{ > + struct msgdma_device *d = ofdma->of_dma_data; > + > + return dma_get_any_slave_channel(&d->dmadev); Interesting, why dma_get_any_slave_channel() dont you care for the right slave channel which is required for your controller..? > +} > + > /** > * msgdma_probe - Driver probe function > * @pdev: Pointer to the platform_device structure > @@ -888,6 +897,16 @@ static int msgdma_probe(struct platform_device *pdev) > if (ret) > goto fail; > > + if (IS_ENABLED(CONFIG_OF)) { no need of this, it is taken care by the core > + ret = of_dma_controller_register(pdev->dev.of_node, > + msgdma_of_xlate, mdev); > + if (ret) { > + dev_err(&pdev->dev, > + "failed to register dma controller"); > + goto fail; > + } > + } > + > dev_notice(&pdev->dev, "Altera mSGDMA driver probe success\n"); > > return 0; > @@ -916,9 +935,19 @@ static int msgdma_remove(struct platform_device *pdev) > return 0; > } > > +#ifdef CONFIG_OF > +static const struct of_device_id msgdma_match[] = { > + { .compatible = "altr,msgdma",}, > + { } > +}; > + > +MODULE_DEVICE_TABLE(of, msgdma_match); > +#endif > + > static struct platform_driver msgdma_driver = { > .driver = { > .name = "altera-msgdma", > + .of_match_table = of_match_ptr(msgdma_match), > }, > .probe = msgdma_probe, > .remove = msgdma_remove, > -- > 2.31.0.rc2 -- ~Vinod
diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c index 9a841ce5f0c5..7e58385facef 100644 --- a/drivers/dma/altera-msgdma.c +++ b/drivers/dma/altera-msgdma.c @@ -19,6 +19,7 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> +#include <linux/of_dma.h> #include "dmaengine.h" @@ -784,6 +785,14 @@ static int request_and_map(struct platform_device *pdev, const char *name, return 0; } +static struct dma_chan *msgdma_of_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct msgdma_device *d = ofdma->of_dma_data; + + return dma_get_any_slave_channel(&d->dmadev); +} + /** * msgdma_probe - Driver probe function * @pdev: Pointer to the platform_device structure @@ -888,6 +897,16 @@ static int msgdma_probe(struct platform_device *pdev) if (ret) goto fail; + if (IS_ENABLED(CONFIG_OF)) { + ret = of_dma_controller_register(pdev->dev.of_node, + msgdma_of_xlate, mdev); + if (ret) { + dev_err(&pdev->dev, + "failed to register dma controller"); + goto fail; + } + } + dev_notice(&pdev->dev, "Altera mSGDMA driver probe success\n"); return 0; @@ -916,9 +935,19 @@ static int msgdma_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id msgdma_match[] = { + { .compatible = "altr,msgdma",}, + { } +}; + +MODULE_DEVICE_TABLE(of, msgdma_match); +#endif + static struct platform_driver msgdma_driver = { .driver = { .name = "altera-msgdma", + .of_match_table = of_match_ptr(msgdma_match), }, .probe = msgdma_probe, .remove = msgdma_remove,
This driver had no device tree support. - add compatible field "altr,msgdma" - define msgdma_of_xlate, with no argument - register dma controller with of_dma_controller_register Signed-off-by: Olivier Dautricourt <olivier.dautricourt@orolia.com> --- Notes: Changes in v2: none Changes from v2 to v3: Removed CONFIG_OF #ifdef's and use if (IS_ENABLED(CONFIG_OF)) only once. Changes from v3 to v4 Reintroduce #ifdef CONFIG_OF for msgdma_match as it produces a unused variable warning drivers/dma/altera-msgdma.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) -- 2.31.0.rc2