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usb: dwc3: of-simple: add support for the Amlogic Meson GXL and AXG SoCs

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Amlogic Meson GXL and AXG SoCs come with a (host-only) dwc3 USB
controller. To use this controller a clock has to be enabled and a reset
line has to be pulsed.
Enabling the clock works identical to other SoCs. However, the reset
line has to be pulsed (using reset_control_reset) instead of using a
level reset (reset_control_{assert,deassert}).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Martin Blumenstingl 2018-02-11 22:15:17 +01:00 committed by Felipe Balbi
parent ff0a632f08
commit e8284db48f
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/dwc3/dwc3-of-simple.c
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@ -93,6 +93,12 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, simple);
simple->dev = dev;
if (of_device_is_compatible(np, "amlogic,meson-axg-dwc3") ||
of_device_is_compatible(np, "amlogic,meson-gxl-dwc3")) {
shared_resets = true;
simple->pulse_resets = true;
}
simple->resets = of_reset_control_array_get(np, shared_resets, true);
if (IS_ERR(simple->resets)) {
ret = PTR_ERR(simple->resets);
@ -207,6 +213,8 @@ static const struct of_device_id of_dwc3_simple_match[] = {
{ .compatible = "xlnx,zynqmp-dwc3" },
{ .compatible = "cavium,octeon-7130-usb-uctl" },
{ .compatible = "sprd,sc9860-dwc3" },
{ .compatible = "amlogic,meson-axg-dwc3" },
{ .compatible = "amlogic,meson-gxl-dwc3" },
{ /* Sentinel */ }
};
MODULE_DEVICE_TABLE(of, of_dwc3_simple_match);