With the new dma_request_chan() the client driver does not need to look for
the DMA resource and it does not need to pass filter_fn anymore.
By switching to the new API the driver can now support deferred probing
against DMA.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
CC: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
CC: David S. Miller <davem@xxxxxxxxxxxxx>
CC: Lokesh Vutla <lokeshvutla@xxxxxx>
---
drivers/crypto/omap-sham.c | 25 ++++++++-----------------
1 file changed, 8 insertions(+), 17 deletions(-)
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 48adb2a0903e..6eefaa2fe58f 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -29,7 +29,6 @@
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
-#include <linux/omap-dma.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
@@ -219,7 +218,6 @@ struct omap_sham_dev {
int irq;
spinlock_t lock;
int err;
- unsigned int dma;
struct dma_chan *dma_lch;
struct tasklet_struct done_task;
u8 polling_mode;
@@ -1842,7 +1840,6 @@ static int omap_sham_get_res_of(struct omap_sham_dev *dd,
goto err;
}
- dd->dma = -1; /* Dummy value that's unused */
dd->pdata = match->data;
err:
@@ -1884,15 +1881,6 @@ static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
goto err;
}
- /* Get the DMA */
- r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!r) {
- dev_err(dev, "no DMA resource info\n");
- err = -ENODEV;
- goto err;
- }
- dd->dma = r->start;
-
/* Only OMAP2/3 can be non-DT */
dd->pdata = &omap_sham_pdata_omap2;
@@ -1946,9 +1934,12 @@ static int omap_sham_probe(struct platform_device *pdev)
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- dd->dma_lch = dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
- &dd->dma, dev, "rx");
- if (!dd->dma_lch) {
+ dd->dma_lch = dma_request_chan(dev, "rx");
+ if (IS_ERR(dd->dma_lch)) {
+ err = PTR_ERR(dd->dma_lch);
+ if (err == -EPROBE_DEFER)
+ goto data_err;
+
dd->polling_mode = 1;
dev_dbg(dev, "using polling mode instead of dma\n");
}
@@ -1995,7 +1986,7 @@ err_algs:
&dd->pdata->algs_info[i].algs_list[j]);
err_pm:
pm_runtime_disable(dev);
- if (dd->dma_lch)
+ if (dd->polling_mode)
dma_release_channel(dd->dma_lch);
data_err:
dev_err(dev, "initialization failed.\n");
@@ -2021,7 +2012,7 @@ static int omap_sham_remove(struct platform_device *pdev)
tasklet_kill(&dd->done_task);
pm_runtime_disable(&pdev->dev);
- if (dd->dma_lch)
+ if (!dd->polling_mode)
dma_release_channel(dd->dma_lch);
return 0;
--
2.8.1
--
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