From 5ed903b3f567616deddf6bfa513ee7b1fcef64d2 Mon Sep 17 00:00:00 2001 From: Steffen Trumtrar Date: Mon, 1 Dec 2014 13:26:32 +0100 Subject: [PATCH] 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 Signed-off-by: Herbert Xu --- .../bindings/crypto/fsl-imx-sahara.txt | 2 +- drivers/crypto/sahara.c | 20 ++++++++++++++++--- 2 files changed, 18 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt b/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt index 5c65eccd0e56..e8a35c71e947 100644 --- a/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt +++ b/Documentation/devicetree/bindings/crypto/fsl-imx-sahara.txt @@ -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,-sahara" diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c index 6fb16fe7eea5..55c0d2bea426 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -24,10 +24,12 @@ #include #include #include +#include #include #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) | -- 2.39.5