Messages in this thread Patch in this message | | | From | Appana Durga Kedareswara rao <> | Subject | [PATCH 1/5] can: xilinx_can: defer the probe if clock is not found | Date | Mon, 12 Aug 2019 12:58:30 +0530 |
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From: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
It's not always the case that clock is already available when can driver get probed at the first time, e.g. the clock is provided by clock wizard which may be probed after can driver. So let's defer the probe when devm_clk_get() call fails and give it chance to try later.
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> --- drivers/net/can/xilinx_can.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index bd95cfa..ac175ab 100644 --- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -1791,7 +1791,8 @@ static int xcan_probe(struct platform_device *pdev) /* Getting the CAN can_clk info */ priv->can_clk = devm_clk_get(&pdev->dev, "can_clk"); if (IS_ERR(priv->can_clk)) { - dev_err(&pdev->dev, "Device clock not found.\n"); + if (PTR_ERR(priv->can_clk) != -EPROBE_DEFER) + dev_err(&pdev->dev, "Device clock not found.\n"); ret = PTR_ERR(priv->can_clk); goto err_free; } -- 2.7.4
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