The Sahara on the i.MX53 is of version 4. Add support for probing the
device.
Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/crypto/fsl-imx-sahara.txt | 2 +-
drivers/crypto/sahara.c | 20 +++++++++++++++++---
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt b/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt
index 5c65eccd0e56..e8a35c71e947 100644
--- a/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt
+++ b/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt
@@ -1,5 +1,5 @@
Freescale SAHARA Cryptographic Accelerator included in some i.MX chips.
-Currently only i.MX27 is supported.
+Currently only i.MX27 and i.MX53 are supported.
Required properties:
- compatible : Should be "fsl,<soc>-sahara"
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index 6fb16fe7eea5..55c0d2bea426 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -24,10 +24,12 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#define SAHARA_NAME "sahara"
#define SAHARA_VERSION_3 3
+#define SAHARA_VERSION_4 4
#define SAHARA_TIMEOUT_MS 1000
#define SAHARA_MAX_HW_DESC 2
#define SAHARA_MAX_HW_LINK 20
@@ -130,6 +132,7 @@ struct sahara_aes_reqctx {
struct sahara_dev {
struct device *device;
+ unsigned int version;
void __iomem *regs_base;
struct clk *clk_ipg;
struct clk *clk_ahb;
@@ -860,6 +863,7 @@ static struct platform_device_id sahara_platform_ids[] = {
MODULE_DEVICE_TABLE(platform, sahara_platform_ids);
static struct of_device_id sahara_dt_ids[] = {
+ { .compatible = "fsl,imx53-sahara" },
{ .compatible = "fsl,imx27-sahara" },
{ /* sentinel */ }
};
@@ -973,13 +977,23 @@ static int sahara_probe(struct platform_device *pdev)
clk_prepare_enable(dev->clk_ahb);
version = sahara_read(dev, SAHARA_REG_VERSION);
- if (version != SAHARA_VERSION_3) {
+ if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx27-sahara")) {
+ if (version != SAHARA_VERSION_3)
+ err = -ENODEV;
+ } else if (of_device_is_compatible(pdev->dev.of_node,
+ "fsl,imx53-sahara")) {
+ if (((version >> 8) & 0xff) != SAHARA_VERSION_4)
+ err = -ENODEV;
+ version = (version >> 8) & 0xff;
+ }
+ if (err == -ENODEV) {
dev_err(&pdev->dev, "SAHARA version %d not supported\n",
- version);
- err = -ENODEV;
+ version);
goto err_algs;
}
+ dev->version = version;
+
sahara_write(dev, SAHARA_CMD_RESET | SAHARA_CMD_MODE_BATCH,
SAHARA_REG_CMD);
sahara_write(dev, SAHARA_CONTROL_SET_THROTTLE(0) |
--
2.1.3
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