crypto: s5p-sss - Add device tree support

This patch adds device tree support to the s5p-sss.c crypto driver.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
CC: David S. Miller <davem@davemloft.net>
CC: <linux-samsung-soc@vger.kernel.org>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 33 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/crypto/samsung-sss.txt b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
new file mode 100644
index 000000000000..f6e09a6231f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
@@ -0,0 +1,25 @@
+Samsung SoC SSS (Security SubSystem) module
+
+The SSS module in S5PV210 SoC supports the following:
+-- Feeder (FeedCtrl)
+-- Advanced Encryption Standard (AES)
+-- Data Encryption Standard (DES)/3DES
+-- Public Key Accelerator (PKA)
+-- SHA-1/SHA-256/MD5/HMAC (SHA-1/SHA-256/MD5)/PRNG
+-- PRNG: Pseudo Random Number Generator
+
+Required properties:
+
+- compatible : Should contain entries for this and backward compatible
+  SSS versions:
+  - "samsung,s5pv210-secss" for S5PV210 SoC.
+- reg : Offset and length of the register set for the module
+- interrupts : interrupt specifiers of SSS module interrupts, should contain
+                two entries:
+                - first : feed control interrupt,
+                - second : hash interrupt.
+
+- clocks : list of clock phandle and specifier pairs for all clocks  listed in
+                clock-names property.
+- clock-names : list of device clock input names; should contain one entry
+                "secss".
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index 2876fa37d1f9..c6aafe84e06a 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -22,6 +22,7 @@
 #include <linux/scatterlist.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <linux/crypto.h>
 #include <linux/interrupt.h>
 
@@ -177,6 +178,12 @@ struct s5p_aes_dev {
 
 static struct s5p_aes_dev *s5p_dev;
 
+static const struct of_device_id s5p_sss_dt_match[] = {
+        { .compatible = "samsung,s5pv210-secss" },
+        { },
+};
+MODULE_DEVICE_TABLE(of, s5p_sss_dt_match);
+
 static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
 {
         SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg));
@@ -672,6 +679,7 @@ static struct platform_driver s5p_aes_crypto = {
         .driver = {
                 .owner  = THIS_MODULE,
                 .name   = "s5p-secss",
+                .of_match_table = s5p_sss_dt_match,
         },
 };