ARM: OMAP2+: gpmc: Converts GPMC driver to pm_runtime capable

Support for pm_runtime add to GPMC driver.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/gpmc.c

@@ -30,6 +30,7 @@
 #include <linux/of_mtd.h>
 #include <linux/of_device.h>
 #include <linux/mtd/nand.h>
+#include <linux/pm_runtime.h>
 
 #include <linux/platform_data/mtd-nand-omap2.h>
 
@@ -1608,7 +1609,8 @@ static int gpmc_probe(struct platform_device *pdev)
 		return PTR_ERR(gpmc_l3_clk);
 	}
 
-	clk_prepare_enable(gpmc_l3_clk);
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
 
 	gpmc_dev = &pdev->dev;
 
@@ -1648,7 +1650,7 @@ static int gpmc_probe(struct platform_device *pdev)
 
 	rc = gpmc_probe_dt(pdev);
 	if (rc < 0) {
-		clk_disable_unprepare(gpmc_l3_clk);
+		pm_runtime_put_sync(&pdev->dev);
 		clk_put(gpmc_l3_clk);
 		dev_err(gpmc_dev, "failed to probe DT parameters\n");
 		return rc;
@@ -1661,6 +1663,8 @@ static int gpmc_remove(struct platform_device *pdev)
 {
 	gpmc_free_irq();
 	gpmc_mem_exit();
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 	gpmc_dev = NULL;
 	return 0;
 }