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crypto: picoxcell - support for device tree matching

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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>
This commit is contained in:
Jamie Iles 2011-08-01 17:25:19 +01:00 committed by Herbert Xu
parent 4efae8c936
commit 30343ef1de
2 changed files with 53 additions and 6 deletions
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23
Documentation/devicetree/bindings/crypto/picochip-spacc.txt Normal file
View File

@ -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";
};

36
drivers/crypto/picoxcell_crypto.c
View File

@ -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,
};