[PATCH v2 02/21] ARM: dts: Remove LPC BMC and Host partitions

Andrew Jeffery
2021-03-19T06:27:33Z

From: "Chia-Wei, Wang" <chiawei_wang@aspeedtech.com>

The LPC controller has no concept of the BMC and the Host partitions.

A concrete instance is that the HICRB[5:4] are for the I/O port address
configurtaion of KCS channel 1/2. However, the KCS driver cannot access
HICRB for channel 1/2 initialization via syscon regmap interface due to
the parition boundary. (i.e. offset 80h)

In addition, for the HW design backward compatibility, a newly added HW
control bit could be located at any reserved one over the LPC addressing
space. Thereby, this patch removes the lpc-bmc and lpc-host child node
and thus the LPC partitioning.

Note that this change requires the synchronization between device tree
change and the driver change. To prevent the misuse of old devicetrees
with new drivers, or vice versa, the v2 compatible strings are adopted
for the LPC device as listed:

"aspeed,ast2400-lpc-v2"
"aspeed,ast2500-lpc-v2"
"aspeed,ast2600-lpc-v2"

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
---
arch/arm/boot/dts/aspeed-g4.dtsi | 70 +++++++-----------
arch/arm/boot/dts/aspeed-g5.dtsi | 121 +++++++++++++-----------------
arch/arm/boot/dts/aspeed-g6.dtsi | 123 +++++++++++++------------------
3 files changed, 133 insertions(+), 181 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed-g4.dtsi
index e7a45ba18fc9..c5aeb3cf3a09 100644
--- a/arch/arm/boot/dts/aspeed-g4.dtsi
+++ b/arch/arm/boot/dts/aspeed-g4.dtsi
@@ -343,59 +343,45 @@ vuart: serial at 1e787000 {
};

lpc: lpc at 1e789000 {
- compatible = "aspeed,ast2400-lpc", "simple-mfd";
+ compatible = "aspeed,ast2400-lpc-v2", "simple-mfd", "syscon";
reg = <0x1e789000 0x1000>;
+ reg-io-width = <4>;

#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x1e789000 0x1000>;

- lpc_bmc: lpc-bmc at 0 {
- compatible = "aspeed,ast2400-lpc-bmc";
- reg = <0x0 0x80>;
+ lpc_ctrl: lpc-ctrl at 80 {
+ compatible = "aspeed,ast2400-lpc-ctrl";
+ reg = <0x80 0x10>;
+ clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
+ status = "disabled";
};

- lpc_host: lpc-host at 80 {
- compatible = "aspeed,ast2400-lpc-host", "simple-mfd", "syscon";
- reg = <0x80 0x1e0>;
- reg-io-width = <4>;
-
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x80 0x1e0>;
-
- lpc_ctrl: lpc-ctrl at 0 {
- compatible = "aspeed,ast2400-lpc-ctrl";
- reg = <0x0 0x10>;
- clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
- status = "disabled";
- };
-
- lpc_snoop: lpc-snoop at 10 {
- compatible = "aspeed,ast2400-lpc-snoop";
- reg = <0x10 0x8>;
- interrupts = <8>;
- clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
- status = "disabled";
- };
+ lpc_snoop: lpc-snoop at 90 {
+ compatible = "aspeed,ast2400-lpc-snoop";
+ reg = <0x90 0x8>;
+ interrupts = <8>;
+ clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
+ status = "disabled";
+ };

- lhc: lhc at 20 {
- compatible = "aspeed,ast2400-lhc";
- reg = <0x20 0x24 0x48 0x8>;
- };
+ lhc: lhc at a0 {
+ compatible = "aspeed,ast2400-lhc";
+ reg = <0xa0 0x24 0xc8 0x8>;
+ };

- lpc_reset: reset-controller at 18 {
- compatible = "aspeed,ast2400-lpc-reset";
- reg = <0x18 0x4>;
- #reset-cells = <1>;
- };
+ lpc_reset: reset-controller at 98 {
+ compatible = "aspeed,ast2400-lpc-reset";
+ reg = <0x98 0x4>;
+ #reset-cells = <1>;
+ };

- ibt: ibt at c0 {
- compatible = "aspeed,ast2400-ibt-bmc";
- reg = <0xc0 0x18>;
- interrupts = <8>;
- status = "disabled";
- };
+ ibt: ibt at 140 {
+ compatible = "aspeed,ast2400-ibt-bmc";
+ reg = <0x140 0x18>;
+ interrupts = <8>;
+ status = "disabled";
};
};

diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index 21930521a986..d733c1f161c1 100644
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -434,91 +434,74 @@ vuart: serial at 1e787000 {
};

lpc: lpc at 1e789000 {
- compatible = "aspeed,ast2500-lpc", "simple-mfd";
+ compatible = "aspeed,ast2500-lpc-v2", "simple-mfd", "syscon";
reg = <0x1e789000 0x1000>;
+ reg-io-width = <4>;

#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x1e789000 0x1000>;

- lpc_bmc: lpc-bmc at 0 {
- compatible = "aspeed,ast2500-lpc-bmc", "simple-mfd", "syscon";
- reg = <0x0 0x80>;
- reg-io-width = <4>;
-
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x0 0x80>;
-
- kcs1: kcs at 24 {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
- interrupts = <8>;
- status = "disabled";
- };
- kcs2: kcs at 28 {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x28 0x1>, <0x34 0x1>, <0x40 0x1>;
- interrupts = <8>;
- status = "disabled";
- };
- kcs3: kcs at 2c {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x2c 0x1>, <0x38 0x1>, <0x44 0x1>;
- interrupts = <8>;
- status = "disabled";
- };
+ kcs1: kcs at 24 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
+ interrupts = <8>;
+ status = "disabled";
};

- lpc_host: lpc-host at 80 {
- compatible = "aspeed,ast2500-lpc-host", "simple-mfd", "syscon";
- reg = <0x80 0x1e0>;
- reg-io-width = <4>;
+ kcs2: kcs at 28 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x28 0x1>, <0x34 0x1>, <0x40 0x1>;
+ interrupts = <8>;
+ status = "disabled";
+ };

- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x80 0x1e0>;
+ kcs3: kcs at 2c {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x2c 0x1>, <0x38 0x1>, <0x44 0x1>;
+ interrupts = <8>;
+ status = "disabled";
+ };

- kcs4: kcs at 94 {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x94 0x1>, <0x98 0x1>, <0x9c 0x1>;
- interrupts = <8>;
- status = "disabled";
- };
+ kcs4: kcs at 114 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x114 0x1>, <0x118 0x1>, <0x11c 0x1>;
+ interrupts = <8>;
+ status = "disabled";
+ };

- lpc_ctrl: lpc-ctrl at 0 {
- compatible = "aspeed,ast2500-lpc-ctrl";
- reg = <0x0 0x10>;
- clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
- status = "disabled";
- };
+ lpc_ctrl: lpc-ctrl at 80 {
+ compatible = "aspeed,ast2500-lpc-ctrl";
+ reg = <0x80 0x10>;
+ clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
+ status = "disabled";
+ };

- lpc_snoop: lpc-snoop at 10 {
- compatible = "aspeed,ast2500-lpc-snoop";
- reg = <0x10 0x8>;
- interrupts = <8>;
- clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
- status = "disabled";
- };
+ lpc_snoop: lpc-snoop at 90 {
+ compatible = "aspeed,ast2500-lpc-snoop";
+ reg = <0x90 0x8>;
+ interrupts = <8>;
+ clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
+ status = "disabled";
+ };

- lpc_reset: reset-controller at 18 {
- compatible = "aspeed,ast2500-lpc-reset";
- reg = <0x18 0x4>;
- #reset-cells = <1>;
- };
+ lpc_reset: reset-controller at 98 {
+ compatible = "aspeed,ast2500-lpc-reset";
+ reg = <0x98 0x4>;
+ #reset-cells = <1>;
+ };

- lhc: lhc at 20 {
- compatible = "aspeed,ast2500-lhc";
- reg = <0x20 0x24 0x48 0x8>;
- };
+ lhc: lhc at a0 {
+ compatible = "aspeed,ast2500-lhc";
+ reg = <0xa0 0x24 0xc8 0x8>;
+ };

- ibt: ibt at c0 {
- compatible = "aspeed,ast2500-ibt-bmc";
- reg = <0xc0 0x18>;
- interrupts = <8>;
- status = "disabled";
- };
+ ibt: ibt at 140 {
+ compatible = "aspeed,ast2500-ibt-bmc";
+ reg = <0x140 0x18>;
+ interrupts = <8>;
+ status = "disabled";
};
};

diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi
index 3ee470c2b7b5..f96607b7b4e2 100644
--- a/arch/arm/boot/dts/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed-g6.dtsi
@@ -460,91 +460,74 @@ wdt4: watchdog at 1e7850c0 {
};

lpc: lpc at 1e789000 {
- compatible = "aspeed,ast2600-lpc", "simple-mfd";
+ compatible = "aspeed,ast2600-lpc-v2", "simple-mfd", "syscon";
reg = <0x1e789000 0x1000>;
+ reg-io-width = <4>;

#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x1e789000 0x1000>;

- lpc_bmc: lpc-bmc at 0 {
- compatible = "aspeed,ast2600-lpc-bmc", "simple-mfd", "syscon";
- reg = <0x0 0x80>;
- reg-io-width = <4>;
-
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x0 0x80>;
-
- kcs1: kcs at 24 {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
- interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>;
- kcs_chan = <1>;
- status = "disabled";
- };
- kcs2: kcs at 28 {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x28 0x1>, <0x34 0x1>, <0x40 0x1>;
- interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;
- status = "disabled";
- };
- kcs3: kcs at 2c {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x2c 0x1>, <0x38 0x1>, <0x44 0x1>;
- interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
- status = "disabled";
- };
+ kcs1: kcs at 24 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
+ interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>;
+ kcs_chan = <1>;
+ status = "disabled";
};

- lpc_host: lpc-host at 80 {
- compatible = "aspeed,ast2600-lpc-host", "simple-mfd", "syscon";
- reg = <0x80 0x1e0>;
- reg-io-width = <4>;
+ kcs2: kcs at 28 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x28 0x1>, <0x34 0x1>, <0x40 0x1>;
+ interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
+ };

- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x80 0x1e0>;
+ kcs3: kcs at 2c {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x2c 0x1>, <0x38 0x1>, <0x44 0x1>;
+ interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
+ };

- kcs4: kcs at 94 {
- compatible = "aspeed,ast2500-kcs-bmc-v2";
- reg = <0x94 0x1>, <0x98 0x1>, <0x9c 0x1>;
- interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
- status = "disabled";
- };
+ kcs4: kcs at 114 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x114 0x1>, <0x118 0x1>, <0x11c 0x1>;
+ interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
+ };

- lpc_ctrl: lpc-ctrl at 0 {
- compatible = "aspeed,ast2600-lpc-ctrl";
- reg = <0x0 0x80>;
- clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
- status = "disabled";
- };
+ lpc_ctrl: lpc-ctrl at 80 {
+ compatible = "aspeed,ast2600-lpc-ctrl";
+ reg = <0x80 0x80>;
+ clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
+ status = "disabled";
+ };

- lpc_snoop: lpc-snoop at 0 {
- compatible = "aspeed,ast2600-lpc-snoop";
- reg = <0x0 0x80>;
- interrupts = <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
- status = "disabled";
- };
+ lpc_snoop: lpc-snoop at 80 {
+ compatible = "aspeed,ast2600-lpc-snoop";
+ reg = <0x80 0x80>;
+ interrupts = <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
+ status = "disabled";
+ };

- lhc: lhc at 20 {
- compatible = "aspeed,ast2600-lhc";
- reg = <0x20 0x24 0x48 0x8>;
- };
+ lhc: lhc at a0 {
+ compatible = "aspeed,ast2600-lhc";
+ reg = <0xa0 0x24 0xc8 0x8>;
+ };

- lpc_reset: reset-controller at 18 {
- compatible = "aspeed,ast2600-lpc-reset";
- reg = <0x18 0x4>;
- #reset-cells = <1>;
- };
+ lpc_reset: reset-controller at 98 {
+ compatible = "aspeed,ast2600-lpc-reset";
+ reg = <0x98 0x4>;
+ #reset-cells = <1>;
+ };

- ibt: ibt at c0 {
- compatible = "aspeed,ast2600-ibt-bmc";
- reg = <0xc0 0x18>;
- interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
- status = "disabled";
- };
+ ibt: ibt at 140 {
+ compatible = "aspeed,ast2600-ibt-bmc";
+ reg = <0x140 0x18>;
+ interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
};
};

--
2.27.0