Re: [PATCH 2/8 v4] crypto:s5p-sss: Add device tree support

Mark Rutland
2014-01-23T17:41:21Z

On Thu, Jan 23, 2014 at 10:28:08AM +0000, Sylwester Nawrocki wrote:
> Hi,
>
> (Adding missing devicetre ML list at CC.)
>
> On 15/01/14 10:14, 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 <ch.naveen@samsung.com>
> > CC: Herbert Xu <herbert@gondor.apana.org.au>
> > CC: David S. Miller <davem@davemloft.net>
> > CC: Vladimir Zapolskiy <vzapolskiy@gmail.com>
> > TO: <linux-crypto@vger.kernel.org>
> > CC: <linux-samsung-soc@vger.kernel.org>
> > ---
> > Changes since v3:
> > None
> >
> > .../devicetree/bindings/crypto/samsung-sss.txt | 20 ++++++++++++++++++++
> > drivers/crypto/s5p-sss.c | 10 +++++++++-
> > 2 files changed, 29 insertions(+), 1 deletion(-)
> > 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..2f9d7e4
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
> > @@ -0,0 +1,20 @@
> > +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
>
> It should be described in what order both interrupts are supposed to be
> specified.
>
> > +- clocks : the required gating clock for the SSS module.
> > +- clock-names : the gating clock name to be requested in the SSS driver.

The _exact_ names expected must be described in the binding, or this
property is useless.

> > diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
> > index 93cddeb..2da5617 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", },
>
> nit: the first semicolon could be omitted.

I assume you mean comma ratehr than semicolon?

Cheers,
Mark.