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authorJamie Iles <jamie@jamieiles.com>2011-08-01 17:25:19 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2011-08-10 19:00:26 +0800
commit30343ef1de348cd21cd7d0cebde3c0175b730e0b (patch)
treef70c2ba846c1f664a7be2e1f2d9b39d4c83c6996
parent4efae8c9363e28892eaaf2a6463f2f5f255e6fb0 (diff)
crypto: picoxcell - support for device tree matching
Allow the crypto engines to be matched from device tree bindings. Cc: devicetree-discuss@lists.ozlabs.org Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--Documentation/devicetree/bindings/crypto/picochip-spacc.txt23
-rw-r--r--drivers/crypto/picoxcell_crypto.c36
2 files changed, 53 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/crypto/picochip-spacc.txt b/Documentation/devicetree/bindings/crypto/picochip-spacc.txt
new file mode 100644
index 000000000000..d8609ece1f4c
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/picochip-spacc.txt
@@ -0,0 +1,23 @@
+Picochip picoXcell SPAcc (Security Protocol Accelerator) bindings
+
+Picochip picoXcell devices contain crypto offload engines that may be used for
+IPSEC and femtocell layer 2 ciphering.
+
+Required properties:
+ - compatible : "picochip,spacc-ipsec" for the IPSEC offload engine
+ "picochip,spacc-l2" for the femtocell layer 2 ciphering engine.
+ - reg : Offset and length of the register set for this device
+ - interrupt-parent : The interrupt controller that controls the SPAcc
+ interrupt.
+ - interrupts : The interrupt line from the SPAcc.
+ - ref-clock : The input clock that drives the SPAcc.
+
+Example SPAcc node:
+
+spacc@10000 {
+ compatible = "picochip,spacc-ipsec";
+ reg = <0x100000 0x10000>;
+ interrupt-parent = <&vic0>;
+ interrupts = <24>;
+ ref-clock = <&ipsec_clk>, "ref";
+};
diff --git a/drivers/crypto/picoxcell_crypto.c b/drivers/crypto/picoxcell_crypto.c
index d119e0e32f23..017340c3b715 100644
--- a/drivers/crypto/picoxcell_crypto.c
+++ b/drivers/crypto/picoxcell_crypto.c
@@ -34,6 +34,7 @@
#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/rtnetlink.h>
@@ -1657,27 +1658,49 @@ static struct spacc_alg l2_engine_algs[] = {
},
};
+#ifdef CONFIG_OF
+static const struct of_device_id spacc_of_id_table[] = {
+ { .compatible = "picochip,spacc-ipsec" },
+ { .compatible = "picochip,spacc-l2" },
+ {}
+};
+#else /* CONFIG_OF */
+#define spacc_of_id_table NULL
+#endif /* CONFIG_OF */
+
+static bool spacc_is_compatible(struct platform_device *pdev,
+ const char *spacc_type)
+{
+ const struct platform_device_id *platid = platform_get_device_id(pdev);
+
+ if (platid && !strcmp(platid->name, spacc_type))
+ return true;
+
+#ifdef CONFIG_OF
+ if (of_device_is_compatible(pdev->dev.of_node, spacc_type))
+ return true;
+#endif /* CONFIG_OF */
+
+ return false;
+}
+
static int __devinit spacc_probe(struct platform_device *pdev)
{
int i, err, ret = -EINVAL;
struct resource *mem, *irq;
- const struct platform_device_id *platid = platform_get_device_id(pdev);
struct spacc_engine *engine = devm_kzalloc(&pdev->dev, sizeof(*engine),
GFP_KERNEL);
if (!engine)
return -ENOMEM;
- if (!platid)
- return -EINVAL;
-
- if (!strcmp(platid->name, "picoxcell-ipsec")) {
+ if (spacc_is_compatible(pdev, "picochip,spacc-ipsec")) {
engine->max_ctxs = SPACC_CRYPTO_IPSEC_MAX_CTXS;
engine->cipher_pg_sz = SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ;
engine->hash_pg_sz = SPACC_CRYPTO_IPSEC_HASH_PG_SZ;
engine->fifo_sz = SPACC_CRYPTO_IPSEC_FIFO_SZ;
engine->algs = ipsec_engine_algs;
engine->num_algs = ARRAY_SIZE(ipsec_engine_algs);
- } else if (!strcmp(platid->name, "picoxcell-l2")) {
+ } else if (spacc_is_compatible(pdev, "picochip,spacc-l2")) {
engine->max_ctxs = SPACC_CRYPTO_L2_MAX_CTXS;
engine->cipher_pg_sz = SPACC_CRYPTO_L2_CIPHER_PG_SZ;
engine->hash_pg_sz = SPACC_CRYPTO_L2_HASH_PG_SZ;
@@ -1826,6 +1849,7 @@ static struct platform_driver spacc_driver = {
#ifdef CONFIG_PM
.pm = &spacc_pm_ops,
#endif /* CONFIG_PM */
+ .of_match_table = spacc_of_id_table,
},
.id_table = spacc_id_table,
};

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