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crypto: sahara - add support for i.MX53 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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. 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: Required properties:
- compatible : Should be "fsl,<soc>-sahara" - compatible : Should be "fsl,<soc>-sahara"

20
drivers/crypto/sahara.c
View File

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