From: "Mark A. Greer" <mgreer@xxxxxxxxxxxxxxx>
Add Device Tree suport to the omap-aes crypto
driver. Currently, only support for OMAP2 and
OMAP3 is being added but support for OMAP4 will
be added in a subsequent patch.
CC: Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>
Signed-off-by: Mark A. Greer <mgreer@xxxxxxxxxxxxxxx>
---
drivers/crypto/omap-aes.c | 119 ++++++++++++++++++++++++++++++++++++----------
1 file changed, 93 insertions(+), 26 deletions(-)
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index faf522f..68bf22d 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -25,6 +25,9 @@
#include <linux/dmaengine.h>
#include <linux/omap-dma.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
#include <linux/io.h>
#include <linux/crypto.h>
#include <linux/interrupt.h>
@@ -819,11 +822,93 @@ static struct crypto_alg algs[] = {
}
};
+#ifdef CONFIG_OF
+static const struct of_device_id omap_aes_of_match[] = {
+ {
+ .compatible = "ti,omap2-aes",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_aes_of_match);
+
+static int omap_aes_get_res_of(struct omap_aes_dev *dd,
+ struct device *dev, struct resource *res)
+{
+ struct device_node *node = dev->of_node;
+ const struct of_device_id *match;
+ int err = 0;
+
+ match = of_match_device(of_match_ptr(omap_aes_of_match), dev);
+ if (!match) {
+ dev_err(dev, "no compatible OF match\n");
+ err = -EINVAL;
+ goto err;
+ }
+
+ err = of_address_to_resource(node, 0, res);
+ if (err < 0) {
+ dev_err(dev, "can't translate OF node address\n");
+ err = -EINVAL;
+ goto err;
+ }
+
+ dd->dma_out = -1; /* Dummy value that's unused */
+ dd->dma_in = -1; /* Dummy value that's unused */
+
+err:
+ return err;
+}
+#else
+static int omap_aes_get_res_dev(struct omap_aes_dev *dd,
+ struct device *dev, struct resource *res)
+{
+ return -EINVAL;
+}
+#endif
+
+static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
+ struct platform_device *pdev, struct resource *res)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *r;
+ int err = 0;
+
+ /* Get the base address */
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r) {
+ dev_err(dev, "no MEM resource info\n");
+ err = -ENODEV;
+ goto err;
+ }
+ memcpy(res, r, sizeof(*res));
+
+ /* Get the DMA out channel */
+ r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!r) {
+ dev_err(dev, "no DMA out resource info\n");
+ err = -ENODEV;
+ goto err;
+ }
+ dd->dma_out = r->start;
+
+ /* Get the DMA in channel */
+ r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (!r) {
+ dev_err(dev, "no DMA in resource info\n");
+ err = -ENODEV;
+ goto err;
+ }
+ dd->dma_in = r->start;
+
+err:
+ return err;
+}
+
static int omap_aes_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct omap_aes_dev *dd;
- struct resource *res;
+ struct resource res;
int err = -ENOMEM, i, j;
u32 reg;
@@ -838,35 +923,18 @@ static int omap_aes_probe(struct platform_device *pdev)
spin_lock_init(&dd->lock);
crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH);
- /* Get the base address */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "invalid resource type\n");
- err = -ENODEV;
+ err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) :
+ omap_aes_get_res_pdev(dd, pdev, &res);
+ if (err)
goto err_res;
- }
- dd->phys_base = res->start;
-
- /* Get the DMA */
- res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!res)
- dev_info(dev, "no DMA info\n");
- else
- dd->dma_out = res->start;
-
- /* Get the DMA */
- res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!res)
- dev_info(dev, "no DMA info\n");
- else
- dd->dma_in = res->start;
-
- dd->io_base = ioremap(dd->phys_base, SZ_4K);
+
+ dd->io_base = devm_request_and_ioremap(dev, &res);
if (!dd->io_base) {
dev_err(dev, "can't ioremap\n");
err = -ENOMEM;
goto err_res;
}
+ dd->phys_base = res.start;
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
@@ -904,7 +972,6 @@ err_algs:
err_dma:
tasklet_kill(&dd->done_task);
tasklet_kill(&dd->queue_task);
- iounmap(dd->io_base);
pm_runtime_disable(dev);
err_res:
kfree(dd);
@@ -932,7 +999,6 @@ static int omap_aes_remove(struct platform_device *pdev)
tasklet_kill(&dd->done_task);
tasklet_kill(&dd->queue_task);
omap_aes_dma_cleanup(dd);
- iounmap(dd->io_base);
pm_runtime_disable(dd->dev);
kfree(dd);
dd = NULL;
@@ -965,6 +1031,7 @@ static struct platform_driver omap_aes_driver = {
.name = "omap-aes",
.owner = THIS_MODULE,
.pm = &omap_aes_pm_ops,
+ .of_match_table = omap_aes_of_match,
},
};
--
1.7.12
--
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