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crypto: sahara - add support for i.MX53

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The Sahara on the i.MX53 is of version 4. Add support for probing the
device.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Steffen Trumtrar 2014-12-01 13:26:32 +01:00 committed by Herbert Xu
parent 20ec9d814e
commit 5ed903b3f5
2 changed files with 18 additions and 4 deletions
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2
Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt
View File

@ -1,5 +1,5 @@
Freescale SAHARA Cryptographic Accelerator included in some i.MX chips.
Currently only i.MX27 is supported.
Currently only i.MX27 and i.MX53 are supported.
Required properties:
- compatible : Should be "fsl,<soc>-sahara"

20
drivers/crypto/sahara.c
View File

@ -24,10 +24,12 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#define SAHARA_NAME "sahara"
#define SAHARA_VERSION_3 3
#define SAHARA_VERSION_4 4
#define SAHARA_TIMEOUT_MS 1000
#define SAHARA_MAX_HW_DESC 2
#define SAHARA_MAX_HW_LINK 20
@ -130,6 +132,7 @@ struct sahara_aes_reqctx {
struct sahara_dev {
struct device *device;
unsigned int version;
void __iomem *regs_base;
struct clk *clk_ipg;
struct clk *clk_ahb;
@ -860,6 +863,7 @@ static struct platform_device_id sahara_platform_ids[] = {
MODULE_DEVICE_TABLE(platform, sahara_platform_ids);
static struct of_device_id sahara_dt_ids[] = {
{ .compatible = "fsl,imx53-sahara" },
{ .compatible = "fsl,imx27-sahara" },
{ /* sentinel */ }
};
@ -973,13 +977,23 @@ static int sahara_probe(struct platform_device *pdev)
clk_prepare_enable(dev->clk_ahb);
version = sahara_read(dev, SAHARA_REG_VERSION);
if (version != SAHARA_VERSION_3) {
if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx27-sahara")) {
if (version != SAHARA_VERSION_3)
err = -ENODEV;
} else if (of_device_is_compatible(pdev->dev.of_node,
"fsl,imx53-sahara")) {
if (((version >> 8) & 0xff) != SAHARA_VERSION_4)
err = -ENODEV;
version = (version >> 8) & 0xff;
}
if (err == -ENODEV) {
dev_err(&pdev->dev, "SAHARA version %d not supported\n",
version);
err = -ENODEV;
version);
goto err_algs;
}
dev->version = version;
sahara_write(dev, SAHARA_CMD_RESET | SAHARA_CMD_MODE_BATCH,
SAHARA_REG_CMD);
sahara_write(dev, SAHARA_CONTROL_SET_THROTTLE(0) |