[PATCH v2 1/3] can: m_can: Make hclk optional

[Franklin S Cooper Jr]

Hclk is the MCAN's interface clock. However, for OMAP based devices such as
DRA7 SoC family the interface clock is handled by hwmod. Therefore, this
interface clock is managed by hwmod driver via pm_runtime_get and
pm_runtime_put calls. Therefore, this interface clock isn't defined in DT
and thus the driver shouldn't fail if this clock isn't found.

Signed-off-by: Franklin S Cooper Jr <fcooper@xxxxxx>
---
Version 2 changes:
Used NULL instead of 0 for unused hclk handle

 drivers/net/can/m_can/m_can.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index f4947a7..ea48e59 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1568,8 +1568,13 @@ static int m_can_plat_probe(struct platform_device *pdev)
 	hclk = devm_clk_get(&pdev->dev, "hclk");
 	cclk = devm_clk_get(&pdev->dev, "cclk");
 
-	if (IS_ERR(hclk) || IS_ERR(cclk)) {
-		dev_err(&pdev->dev, "no clock found\n");
+	if (IS_ERR(hclk)) {
+		dev_warn(&pdev->dev, "hclk could not be found\n");
+		hclk = NULL;
+	}
+
+	if (IS_ERR(cclk)) {
+		dev_err(&pdev->dev, "cclk could not be found\n");
 		ret = -ENODEV;
 		goto failed_ret;
 	}
-- 
2.10.0