powerpc/legacy_serial: Bail if reg-offset/shift properties are present (1e6d1f26) · Commits · 戴 / test

The legacy serial driver does not work with an 8250 type UART that is described in the device tree with the reg-offset and reg-shift properties. This change makes legacy_serial ignore these devices. Signed-off-by:

John Linn <john.linn@xilinx.com> Signed-off-by:

Grant Likely <grant.likely@secretlab.ca>

arch/powerpc/kernel/legacy_serial.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -136,6 +136,11 @@ static int __init add_legacy_soc_port(struct device_node *np,
		if (of_get_property(np, "clock-frequency", NULL) == NULL)
		return -1;

		/* if reg-shift or offset, don't try to use it */
		if ((of_get_property(np, "reg-shift", NULL) != NULL) \|\|
		(of_get_property(np, "reg-offset", NULL) != NULL))
		return -1;

		/* if rtas uses this device, don't try to use it as well */
		if (of_get_property(np, "used-by-rtas", NULL) != NULL)
		return -1;

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