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Commit 9454a0ca authored by Anson Huang's avatar Anson Huang Committed by Shawn Guo
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ARM: imx: add mmdc ipg clock operation for mmdc 



i.MX6 SoCs have MMDC ipg clock for registers access, to make
sure MMDC registers access successfully, add optional clock
enable for MMDC driver.

Signed-off-by: default avatarAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 57361846

arch/arm/mach-imx/mmdc.c

+14 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
 * http://www.gnu.org/copyleft/gpl.html

 */



#include <linux/clk.h>

#include <linux/hrtimer.h>

#include <linux/init.h>

#include <linux/interrupt.h>
@@ -546,7 +547,20 @@ static int imx_mmdc_probe(struct platform_device *pdev) 
{

	struct device_node *np = pdev->dev.of_node;

	void __iomem *mmdc_base, *reg;

	struct clk *mmdc_ipg_clk;

	u32 val;

	int err;



	/* the ipg clock is optional */

	mmdc_ipg_clk = devm_clk_get(&pdev->dev, NULL);

	if (IS_ERR(mmdc_ipg_clk))

		mmdc_ipg_clk = NULL;



	err = clk_prepare_enable(mmdc_ipg_clk);

	if (err) {

		dev_err(&pdev->dev, "Unable to enable mmdc ipg clock.\n");

		return err;

	}



	mmdc_base = of_iomap(np, 0);

	WARN_ON(!mmdc_base);