diff mbox series

[1/7] ARM: imx: add mmdc ipg clock operation for mmdc

Message ID 1535701998-20443-2-git-send-email-Anson.Huang@nxp.com
State New
Headers show
Series Add i.MX6 SoCs mmdc ipg clocks management | expand

Commit Message

Anson Huang Aug. 31, 2018, 7:53 a.m. UTC 
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: Anson Huang <Anson.Huang@nxp.com>
---
 arch/arm/mach-imx/mmdc.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Comments

Shawn Guo Sept. 10, 2018, 12:17 a.m. UTC | #1 
On Fri, Aug 31, 2018 at 03:53:12PM +0800, Anson Huang wrote:
> 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: Anson Huang <Anson.Huang@nxp.com>

Applied this one, thanks.
diff mbox series

Patch

diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
index 04b3bf7..e49e068 100644
--- a/arch/arm/mach-imx/mmdc.c
+++ b/arch/arm/mach-imx/mmdc.c
@@ -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);