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| author | Christian Lamparter <chunkeey@gmail.com> | 2018-10-15 20:00:06 +0200 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2018-10-20 16:13:39 +0200 |
| commit | 68bb91018df1c3d9474041a4d55e1cfd66022522 (patch) | |
| tree | b9fd23833fb725429e8257180323d660722b1a0e /target/linux/apm821xx/dts | |
| parent | 92bcd08989dede0f60589023e2aea4a864de76c6 (diff) | |
| download | upstream-68bb91018df1c3d9474041a4d55e1cfd66022522.tar.gz upstream-68bb91018df1c3d9474041a4d55e1cfd66022522.tar.bz2 upstream-68bb91018df1c3d9474041a4d55e1cfd66022522.zip | |
apm821xx: set uart compatible to ns16750
The APM821XX/PPC460EX datasheet mentions:
"Register compatibility with 16750 register set"
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Diffstat (limited to 'target/linux/apm821xx/dts')
| -rw-r--r-- | target/linux/apm821xx/dts/apm82181.dtsi | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/target/linux/apm821xx/dts/apm82181.dtsi b/target/linux/apm821xx/dts/apm82181.dtsi index be8ace9207..79596da672 100644 --- a/target/linux/apm821xx/dts/apm82181.dtsi +++ b/target/linux/apm821xx/dts/apm82181.dtsi @@ -306,24 +306,29 @@ }; UART0: serial@ef600300 { - device_type = "serial"; - compatible = "ns16550"; + /* + * AMCC's BSP u-boot scans for the "ns16550" + * compatible, without it, u-boot wouldn't + * set the "clock-frequency" which is required. + * + * However, the hardware documentation lists: + * "Register compatibility with 16750 register set" + */ + compatible = "ns16750", "ns16550"; reg = <0xef600300 0x00000008>; virtual-reg = <0xef600300>; clock-frequency = <0>; /* Filled in by U-Boot */ - current-speed = <0>; /* Filled in by U-Boot */ interrupt-parent = <&UIC1>; interrupts = <0x01 IRQ_TYPE_LEVEL_HIGH>; status = "disabled"; }; UART1: serial@ef600400 { - device_type = "serial"; - compatible = "ns16550"; + /* same "ns16750" as with UART0 */ + compatible = "ns16750", "ns16550"; reg = <0xef600400 0x00000008>; virtual-reg = <0xef600400>; clock-frequency = <0>; /* Filled in by U-Boot */ - current-speed = <0>; /* Filled in by U-Boot */ interrupt-parent = <&UIC0>; interrupts = <0x01 IRQ_TYPE_LEVEL_HIGH>; status = "disabled"; |