On both the ast2400 and ast2500 SoCs, the LPC reset controller is required to bring the UARTs out of reset without waiting for the LPC reset to be deasserted.
Signed-off-by: Joel Stanley <j...@jms.id.au> --- Bindings and driver change is under reivew: https://lkml.org/lkml/2018/2/19/12 arch/arm/boot/dts/aspeed-g4.dtsi | 10 ++++++++++ arch/arm/boot/dts/aspeed-g5.dtsi | 10 ++++++++++ 2 files changed, 20 insertions(+) diff --git a/arch/arm/boot/dts/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed-g4.dtsi index 48c28a71ae7e..36ae23aa3b48 100644 --- a/arch/arm/boot/dts/aspeed-g4.dtsi +++ b/arch/arm/boot/dts/aspeed-g4.dtsi @@ -162,6 +162,7 @@ reg-shift = <2>; interrupts = <9>; clocks = <&syscon ASPEED_CLK_GATE_UART1CLK>; + resets = <&lpc_reset 4>; no-loopback-test; status = "disabled"; }; @@ -249,6 +250,12 @@ reg = <0x20 0x24 0x48 0x8>; }; + lpc_reset: reset-controller@18 { + compatible = "aspeed,ast2400-lpc-reset"; + reg = <0x18 0x4>; + #reset-cells = <1>; + }; + ibt: ibt@c0 { compatible = "aspeed,ast2400-ibt-bmc"; reg = <0xc0 0x18>; @@ -264,6 +271,7 @@ reg-shift = <2>; interrupts = <32>; clocks = <&syscon ASPEED_CLK_GATE_UART2CLK>; + resets = <&lpc_reset 5>; no-loopback-test; status = "disabled"; }; @@ -274,6 +282,7 @@ reg-shift = <2>; interrupts = <33>; clocks = <&syscon ASPEED_CLK_GATE_UART3CLK>; + resets = <&lpc_reset 6>; no-loopback-test; status = "disabled"; }; @@ -284,6 +293,7 @@ reg-shift = <2>; interrupts = <34>; clocks = <&syscon ASPEED_CLK_GATE_UART4CLK>; + resets = <&lpc_reset 7>; no-loopback-test; status = "disabled"; }; diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi index 8eac57c33880..17ee0fa33a14 100644 --- a/arch/arm/boot/dts/aspeed-g5.dtsi +++ b/arch/arm/boot/dts/aspeed-g5.dtsi @@ -205,6 +205,7 @@ reg-shift = <2>; interrupts = <9>; clocks = <&syscon ASPEED_CLK_GATE_UART1CLK>; + resets = <&lpc_reset 4>; no-loopback-test; status = "disabled"; }; @@ -299,6 +300,12 @@ reg = <0x20 0x24 0x48 0x8>; }; + lpc_reset: reset-controller@18 { + compatible = "aspeed,ast2500-lpc-reset"; + reg = <0x18 0x4>; + #reset-cells = <1>; + }; + ibt: ibt@c0 { compatible = "aspeed,ast2500-ibt-bmc"; reg = <0xc0 0x18>; @@ -314,6 +321,7 @@ reg-shift = <2>; interrupts = <32>; clocks = <&syscon ASPEED_CLK_GATE_UART2CLK>; + resets = <&lpc_reset 5>; no-loopback-test; status = "disabled"; }; @@ -324,6 +332,7 @@ reg-shift = <2>; interrupts = <33>; clocks = <&syscon ASPEED_CLK_GATE_UART3CLK>; + resets = <&lpc_reset 6>; no-loopback-test; status = "disabled"; }; @@ -334,6 +343,7 @@ reg-shift = <2>; interrupts = <34>; clocks = <&syscon ASPEED_CLK_GATE_UART4CLK>; + resets = <&lpc_reset 7>; no-loopback-test; status = "disabled"; }; -- 2.15.1
