mtd: nand: clk: preparation for switch to common clock framework

As a first step towards migrating davinci platforms to use common clock
framework, replace all instances of clk_enable() with clk_prepare_enable()
and clk_disable() with clk_disable_unprepare(). Until the platform is
switched to use the CONFIG_HAVE_CLK_PREPARE Kconfig variable, this just
adds a might_sleep() call and would work without any issues.

This will make it easy later to switch to common clk based implementation
of clk driver from DaVinci specific driver.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Reviewed-by: Mike Turquette <mturquette@linaro.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index f386b3c..df1ab7d 100644 (file)
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -724,7 +724,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
                goto err_clk;
        }
 
-       ret = clk_enable(info->clk);
+       ret = clk_prepare_enable(info->clk);
        if (ret < 0) {
                dev_dbg(&pdev->dev, "unable to enable AEMIF clock, err %d\n",
                        ret);
@@ -835,7 +835,7 @@ syndrome_done:
 
 err_scan:
 err_timing:
-       clk_disable(info->clk);
+       clk_disable_unprepare(info->clk);
 
 err_clk_enable:
        clk_put(info->clk);
@@ -872,7 +872,7 @@ static int __exit nand_davinci_remove(struct platform_device *pdev)
 
        nand_release(&info->mtd);
 
-       clk_disable(info->clk);
+       clk_disable_unprepare(info->clk);
        clk_put(info->clk);
 
        kfree(info);