提交 13731d86 编写于 作者: J Jongsung Kim 提交者: Olof Johansson

ARM: bcm2835: override the HW UART periphid

Stephen Warren reported the recent commit 78506f22 (add support for
extended FIFO-size of PL011-r1p5) breaks the serial port on the
BCM2835 ARM SoC.

A UART compatible with the ARM PL011-r1p5 should have 32-deep FIFOs.
The BCM2835 UART just looks like an ARM PL011-r1p5, but has 16-deep
FIFOs just like PL011-r1p4 or earlier revisions. As a workaround for
this compatibility issue, this patch overrides the HW UART periphid
register values with the actually compatible UART periphid 0x00241011
(r1p3 or r1p4).
Reported-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NJongsung Kim <neidhard.kim@lge.com>
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>
上级 04b5e56f
......@@ -44,6 +44,7 @@
reg = <0x7e201000 0x1000>;
interrupts = <2 25>;
clock-frequency = <3000000>;
arm,primecell-periphid = <0x00241011>;
};
gpio: gpio {
......
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