crypto: caam - Enable and disable clocks on Freescale i.MX platforms (24821c46) · Commits · 戴 / test

drivers/crypto/caam/compat.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@
		#include <linux/types.h>
		#include <linux/debugfs.h>
		#include <linux/circ_buf.h>
		#include <linux/clk.h>
		#include <net/xfrm.h>

		#include <crypto/algapi.h>

drivers/crypto/caam/ctrl.c

+88 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,24 @@
		#include "desc_constr.h"
		#include "error.h"

		/*
		* ARM targets tend to have clock control subsystems that can
		* enable/disable clocking to our device.
		*/
		#ifdef CONFIG_ARM
		static inline struct clk caam_drv_identify_clk(struct device dev,
		char *clk_name)
		{
		return devm_clk_get(dev, clk_name);
		}
		#else
		static inline struct clk caam_drv_identify_clk(struct device dev,
		char *clk_name)
		{
		return NULL;
		}
		#endif

		/*
		* Descriptor to instantiate RNG State Handle 0 in normal mode and
		* load the JDKEK, TDKEK and TDSK registers
		@@ -304,6 +322,12 @@ static int caam_remove(struct platform_device *pdev)
		/* Unmap controller region */
		iounmap(ctrl);

		/* shut clocks off before finalizing shutdown */
		clk_disable_unprepare(ctrlpriv->caam_ipg);
		clk_disable_unprepare(ctrlpriv->caam_mem);
		clk_disable_unprepare(ctrlpriv->caam_aclk);
		clk_disable_unprepare(ctrlpriv->caam_emi_slow);

		return ret;
		}

		@@ -391,6 +415,7 @@ static int caam_probe(struct platform_device *pdev)
		struct device_node nprop, np;
		struct caam_ctrl __iomem *ctrl;
		struct caam_drv_private *ctrlpriv;
		struct clk *clk;
		#ifdef CONFIG_DEBUG_FS
		struct caam_perfmon *perfmon;
		#endif
		@@ -409,6 +434,69 @@ static int caam_probe(struct platform_device *pdev)
		ctrlpriv->pdev = pdev;
		nprop = pdev->dev.of_node;

		/* Enable clocking */
		clk = caam_drv_identify_clk(&pdev->dev, "ipg");
		if (IS_ERR(clk)) {
		ret = PTR_ERR(clk);
		dev_err(&pdev->dev,
		"can't identify CAAM ipg clk: %d\n", ret);
		return -ENODEV;
		}
		ctrlpriv->caam_ipg = clk;

		clk = caam_drv_identify_clk(&pdev->dev, "mem");
		if (IS_ERR(clk)) {
		ret = PTR_ERR(clk);
		dev_err(&pdev->dev,
		"can't identify CAAM mem clk: %d\n", ret);
		return -ENODEV;
		}
		ctrlpriv->caam_mem = clk;

		clk = caam_drv_identify_clk(&pdev->dev, "aclk");
		if (IS_ERR(clk)) {
		ret = PTR_ERR(clk);
		dev_err(&pdev->dev,
		"can't identify CAAM aclk clk: %d\n", ret);
		return -ENODEV;
		}
		ctrlpriv->caam_aclk = clk;

		clk = caam_drv_identify_clk(&pdev->dev, "emi_slow");
		if (IS_ERR(clk)) {
		ret = PTR_ERR(clk);
		dev_err(&pdev->dev,
		"can't identify CAAM emi_slow clk: %d\n", ret);
		return -ENODEV;
		}
		ctrlpriv->caam_emi_slow = clk;

		ret = clk_prepare_enable(ctrlpriv->caam_ipg);
		if (ret < 0) {
		dev_err(&pdev->dev, "can't enable CAAM ipg clock: %d\n", ret);
		return -ENODEV;
		}

		ret = clk_prepare_enable(ctrlpriv->caam_mem);
		if (ret < 0) {
		dev_err(&pdev->dev, "can't enable CAAM secure mem clock: %d\n",
		ret);
		return -ENODEV;
		}

		ret = clk_prepare_enable(ctrlpriv->caam_aclk);
		if (ret < 0) {
		dev_err(&pdev->dev, "can't enable CAAM aclk clock: %d\n", ret);
		return -ENODEV;
		}

		ret = clk_prepare_enable(ctrlpriv->caam_emi_slow);
		if (ret < 0) {
		dev_err(&pdev->dev, "can't enable CAAM emi slow clock: %d\n",
		ret);
		return -ENODEV;
		}

		/* Get configuration properties from device tree */
		/* First, get register page */
		ctrl = of_iomap(nprop, 0);

drivers/crypto/caam/intern.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,11 @@ struct caam_drv_private {
		Handles of the RNG4 block are initialized
		by this driver */

		struct clk *caam_ipg;
		struct clk *caam_mem;
		struct clk *caam_aclk;
		struct clk *caam_emi_slow;

		/*
		* debugfs entries for developer view into driver/device
		* variables at runtime.

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