[2/9,v5] crypto:s5p-sss: Add device tree support

Commit Message

Naveen Krishna Chatradhi Jan. 29, 2014, 9:20 a.m. UTC

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

Also, Documentation under devicetree/bindings added.

Signed-off-by: Naveen Krishna Ch <[e-mail]>
CC: Herbert Xu <[e-mail]>
CC: David S. Miller <[e-mail]>
CC: Vladimir Zapolskiy <[e-mail]>
TO: <[e-mail]>
CC: <[e-mail]>
---
Changes since v4:
Modified Documentation to give clock names and example for interrupts

Changes since v3:
None
 .../devicetree/bindings/crypto/samsung-sss.txt     |   24 ++++++++++++++++++++
 drivers/crypto/s5p-sss.c                           |    8 +++++++
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/crypto/samsung-sss.txt

Comments

Tomasz Figa Feb. 6, 2014, 2:36 p.m. UTC | #1

Hi Naveen,

On 29.01.2014 10:20, Naveen Krishna Chatradhi wrote:
> This patch adds device tree support to the s5p-sss.c crypto driver.
>
> Also, Documentation under devicetree/bindings added.
>
> Signed-off-by: Naveen Krishna Ch <[e-mail]>
> CC: Herbert Xu <[e-mail]>
> CC: David S. Miller <[e-mail]>
> CC: Vladimir Zapolskiy <[e-mail]>
> TO: <[e-mail]>
> CC: <[e-mail]>
> ---
> Changes since v4:
> Modified Documentation to give clock names and example for interrupts
>
> Changes since v3:
> None
>   .../devicetree/bindings/crypto/samsung-sss.txt     |   24 ++++++++++++++++++++
>   drivers/crypto/s5p-sss.c                           |    8 +++++++
>   2 files changed, 32 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/crypto/samsung-sss.txt
>
> diff --git a/Documentation/devicetree/bindings/crypto/samsung-sss.txt b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
> new file mode 100644
> index 0000000..d193084
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
> @@ -0,0 +1,24 @@
> +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 : the interrupt-specifier for the SSS module.
> +		Two interrupts "feed control and hash" in case of S5PV210
> +	   Eg : interrupts = <0 feed-control 0> <0 hash 0>;

Please rewrite the description of interrupts property sa follows:

- interrupts : interrupt specifiers of SSS module interrupts, should
   contain two entries:
     - first : feed control interrupt,
     - second : hash interrupt.

Then in later patch adding support for Exynos, it shoudl be rewritten to:

- interrupts : interrupt specifiers of SSS module interrupts, should
   contain following entries:
     - first : feed control interrupt (required for all variants),
     - second : hash interrupt (required only for samsung,s5pv210-secss).

Best regards,
Tomasz
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Patch

diff --git a/Documentation/devicetree/bindings/crypto/samsung-sss.txt b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
new file mode 100644
index 0000000..d193084
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
@@ -0,0 +1,24 @@ 
+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 : the interrupt-specifier for the SSS module.
+		Two interrupts "feed control and hash" in case of S5PV210
+	   Eg : interrupts = <0 feed-control 0> <0 hash 0>;
+- 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 93cddeb..73c8b38 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));
@@ -677,6 +684,7 @@  static struct platform_driver s5p_aes_crypto = {
 	.driver	= {
 		.owner	= THIS_MODULE,
 		.name	= "s5p-secss",
+		.of_match_table = s5p_sss_dt_match,
 	},
 };