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Commit 4534571e authored by Anson Huang's avatar Anson Huang Committed by Greg Kroah-Hartman
Browse files

ARM: imx: add mmdc ipg clock operation for mmdc 



[ Upstream commit 9454a0caff6ac6d2a5ea17dd624dc13387bbfcd3 ]

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>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent fa734443

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>
@@ -547,7 +548,20 @@ 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);