[PATCH v2 03/10] crypto: omap-aes - Convert to use pm_runtime API

[Mark A. Greer]

From: "Mark A. Greer" <mgr...@animalcreek.com>

Convert the omap-aes crypto driver to use the
pm_runtime API instead of the clk API.

CC: Kevin Hilman <khil...@deeprootsystems.com>
CC: Dmitry Kasatkin <dmitry.kasat...@intel.com>
Signed-off-by: Mark A. Greer <mgr...@animalcreek.com>
---
 drivers/crypto/omap-aes.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index 33cd783..c229852 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -19,10 +19,10 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
-#include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/scatterlist.h>
 #include <linux/dma-mapping.h>
+#include <linux/pm_runtime.h>
 #include <linux/io.h>
 #include <linux/crypto.h>
 #include <linux/interrupt.h>
@@ -96,7 +96,6 @@ struct omap_aes_dev {
        struct list_head        list;
        unsigned long           phys_base;
        void __iomem            *io_base;
-       struct clk              *iclk;
        struct omap_aes_ctx     *ctx;
        struct device           *dev;
        unsigned long           flags;
@@ -167,7 +166,7 @@ static int omap_aes_hw_init(struct omap_aes_dev *dd)
         * It may be long delays between requests.
         * Device might go to off mode to save power.
         */
-       clk_enable(dd->iclk);
+       pm_runtime_get_sync(dd->dev);
 
        if (!(dd->flags & FLAGS_INIT)) {
                dd->flags |= FLAGS_INIT;
@@ -518,7 +517,7 @@ static void omap_aes_finish_req(struct omap_aes_dev *dd, 
int err)
 
        pr_debug("err: %d\n", err);
 
-       clk_disable(dd->iclk);
+       pm_runtime_put_sync(dd->dev);
        dd->flags &= ~FLAGS_BUSY;
 
        req->base.complete(&req->base, err);
@@ -813,26 +812,21 @@ static int omap_aes_probe(struct platform_device *pdev)
        else
                dd->dma_in = res->start;
 
-       /* Initializing the clock */
-       dd->iclk = clk_get(dev, "ick");
-       if (IS_ERR(dd->iclk)) {
-               dev_err(dev, "clock intialization failed.\n");
-               err = PTR_ERR(dd->iclk);
-               goto err_res;
-       }
-
        dd->io_base = ioremap(dd->phys_base, SZ_4K);
        if (!dd->io_base) {
                dev_err(dev, "can't ioremap\n");
                err = -ENOMEM;
-               goto err_io;
+               goto err_res;
        }
 
-       clk_enable(dd->iclk);
+       pm_runtime_enable(dev);
+       pm_runtime_get_sync(dev);
+
        reg = omap_aes_read(dd, AES_REG_REV);
        dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
                 (reg & AES_REG_REV_MAJOR) >> 4, reg & AES_REG_REV_MINOR);
-       clk_disable(dd->iclk);
+
+       pm_runtime_put_sync(dev);
 
        tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd);
        tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd);
@@ -862,8 +856,7 @@ err_dma:
        tasklet_kill(&dd->done_task);
        tasklet_kill(&dd->queue_task);
        iounmap(dd->io_base);
-err_io:
-       clk_put(dd->iclk);
+       pm_runtime_disable(dev);
 err_res:
        kfree(dd);
        dd = NULL;
@@ -891,7 +884,7 @@ static int omap_aes_remove(struct platform_device *pdev)
        tasklet_kill(&dd->queue_task);
        omap_aes_dma_cleanup(dd);
        iounmap(dd->io_base);
-       clk_put(dd->iclk);
+       pm_runtime_disable(dd->dev);
        kfree(dd);
        dd = NULL;
 
-- 
1.7.12

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