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can: flexcan: flexcan_probe(): make regulator xceiver optional 

As the transcevier regulator is optional, this patch switches from
devm_regulator_get() to devm_regulator_get_optional(). This gets rid of "using
dummy regulator" warning message from the regulator core, if no regulator is
available.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20200922144429.2613631-8-mkl@pengutronix.de
This commit is contained in:
Marc Kleine-Budde 2020-09-22 16:44:16 +02:00
parent ab60523a76
commit 3d60f33a7a
1 changed files with 4 additions and 2 deletions
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6
drivers/net/can/flexcan.c
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@ -1579,11 +1579,13 @@ static int flexcan_probe(struct platform_device *pdev)
u8 clk_src = 1;
u32 clock_freq = 0;
reg_xceiver = devm_regulator_get(&pdev->dev, "xceiver");
reg_xceiver = devm_regulator_get_optional(&pdev->dev, "xceiver");
if (PTR_ERR(reg_xceiver) == -EPROBE_DEFER)
return -EPROBE_DEFER;
else if (IS_ERR(reg_xceiver))
else if (PTR_ERR(reg_xceiver) == -ENODEV)
reg_xceiver = NULL;
else if (IS_ERR(reg_xceiver))
return PTR_ERR(reg_xceiver);
if (pdev->dev.of_node) {
of_property_read_u32(pdev->dev.of_node,