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bus: fsl-mc: MC control registers are not always available

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As per the device tree binding, in certain scenarios such as
virtualization scenarios, the MC control registers are not
available so don't error out if they are not present.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Link: https://lore.kernel.org/r/20200914105459.27448-2-laurentiu.tudor@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laurentiu Tudor 2020-09-14 13:54:59 +03:00 committed by Greg Kroah-Hartman
parent 3b844345e1
commit aef85b56c3
1 changed files with 4 additions and 4 deletions
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8
drivers/bus/fsl-mc/fsl-mc-bus.c
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@ -915,11 +915,11 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mc);
plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);
if (IS_ERR(mc->fsl_mc_regs))
return PTR_ERR(mc->fsl_mc_regs);
if (plat_res)
mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);
if (IS_ENABLED(CONFIG_ACPI) && !dev_of_node(&pdev->dev)) {
if (mc->fsl_mc_regs && IS_ENABLED(CONFIG_ACPI) &&
!dev_of_node(&pdev->dev)) {
mc_stream_id = readl(mc->fsl_mc_regs + FSL_MC_FAPR);
/*
* HW ORs the PL and BMT bit, places the result in bit 15 of