[PATCH v8 0/9] DTS updates for system1 BMC

[PATCH v8 0/9] DTS updates for system1 BMC

[Ninad Palsule]

Hello,

Please review the patch set version 8.

V8:
---
  - Updated subject line from bindings to dt-bindings
  - Updated comment with reviewed by.

V7:
---
  - Updated pattern in the ast2400-gpio.yaml
  - Dropped "dt-bindings: net: faraday,ftgmac100" patch sending it
    separately.

V6:
---
  - Fixed dt_binding_check errors for ipmb-dev.yaml
  - Changed the hog parsing pattern in ast2400-gpio

V5:
---
  - Improved IPBM device documentation.
  - Added the hog parsing in ast2400-gpio

V4:
---
  - Removed "Add RGMII support" patch as it needs some work from the
    driver side.
  - Improved IPBM device documentation.
  - There is a new warning in CHECK_DTBS which are false positive so
    ignored them.
    arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dtb: gpio@1e780000: 'hog-0', 'hog-1', 'hog-2', 'hog-3' do not match any of the regexes: 'pinctrl-[0-9]+'

V3:
---
  - Fixed dt_binding_check warnings in ipmb-dev.yaml
  - Updated title and description in ipmb-dev.yaml file.
  - Updated i2c-protocol description in ipmb-dev.yaml file.

V2:
---
  Fixed CHECK_DTBS errors by
    - Using generic node names
    - Documenting phy-mode rgmii-rxid in ftgmac100.yaml
    - Adding binding documentation for IPMB device interface

NINAD PALSULE (6):
  ARM: dts: aspeed: system1: Add IPMB device
  ARM: dts: aspeed: system1: Add GPIO line name
  ARM: dts: aspeed: system1: Reduce sgpio speed
  ARM: dts: aspeed: system1: Update LED gpio name
  ARM: dts: aspeed: system1: Remove VRs max8952
  ARM: dts: aspeed: system1: Mark GPIO line high/low

Ninad Palsule (3):
  dt-bindings: ipmi: Add binding for IPMB device
  dt-bindings: gpio: ast2400-gpio: Add hogs parsing
  ARM: dts: aspeed: system1: Disable gpio pull down

 .../bindings/gpio/aspeed,ast2400-gpio.yaml    |   6 +
 .../devicetree/bindings/ipmi/ipmb-dev.yaml    |  56 +++++++
 .../dts/aspeed/aspeed-bmc-ibm-system1.dts     | 139 +++++++++++-------
 3 files changed, 147 insertions(+), 54 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml

-- 
2.43.0

[PATCH v8 1/9] dt-bindings: ipmi: Add binding for IPMB device

[Ninad Palsule]

Add device tree binding document for the IPMB device interface.
This device is already in use in both driver and .dts files.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 .../devicetree/bindings/ipmi/ipmb-dev.yaml    | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml

diff --git a/Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml b/Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml
new file mode 100644
index 000000000000..8b0d71901195
--- /dev/null
+++ b/Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ipmi/ipmb-dev.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: The Intelligent Platform Management Bus(IPMB) Device
+
+description: |
+  The IPMB is an I2C bus which provides interconnection between a Baseboard
+  Management Controller(BMC) and chassis electronics. The BMC sends IPMI
+  requests to intelligent controllers like Satellite Management Controller(MC)
+  devices via IPMB and the device sends responses back to the BMC.
+  This device uses an I2C slave device to send and receive IPMB messages,
+  either on a BMC or other MC. A miscellaneous device provices a user space
+  program to communicate with the kernel and the backend device. Some IPMB
+  devices only support the I2C protocol and not the SMB protocol.
+
+  IPMB communications protocol Specification V1.0
+  https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmp-spec-v1.0.pdf
+
+maintainers:
+  - Ninad Palsule <ninad@linux.ibm.com>
+
+properties:
+  compatible:
+    enum:
+      - ipmb-dev
+
+  reg:
+    maxItems: 1
+
+  i2c-protocol:
+    description:
+      Use I2C block transfer instead of SMBUS block transfer.
+    type: boolean
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/i2c/i2c.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ipmb-dev@10 {
+            compatible = "ipmb-dev";
+            reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
+            i2c-protocol;
+        };
+    };
-- 
2.43.0

[PATCH v8 2/9] dt-bindings: gpio: ast2400-gpio: Add hogs parsing

[Ninad Palsule]

Allow parsing GPIO controller children nodes with GPIO hogs.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 .../devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml       | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml b/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml
index b9afd07a9d24..b16273e69dfe 100644
--- a/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml
@@ -46,6 +46,12 @@ properties:
     minimum: 12
     maximum: 232
 
+patternProperties:
+  "-hog(-[0-9]+)?$":
+    type: object
+    required:
+      - gpio-hog
+
 required:
   - compatible
   - reg
-- 
2.43.0

[PATCH v8 3/9] ARM: dts: aspeed: system1: Add IPMB device

[Ninad Palsule]

Add IPMB device sitting behind PCH module

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index 360b9ce3c850..53d0abece02c 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -763,6 +763,15 @@ i2c3mux0chn7: i2c@7 {
 
 &i2c4 {
 	status = "okay";
+	multi-master;
+	bus-frequency = <1000000>;
+
+	ipmb@10 {
+		compatible = "ipmb-dev";
+		reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
+
+		i2c-protocol;
+	};
 };
 
 &i2c5 {
-- 
2.43.0

[PATCH v8 4/9] ARM: dts: aspeed: system1: Add GPIO line name

[Ninad Palsule]

Add following GPIO line name so that userspace can control them
    - Flash write override
    - pch-reset

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index 53d0abece02c..5567e24ff99b 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -370,7 +370,7 @@ &gpio0 {
 	/*K0-K7*/	"","","","","","","","",
 	/*L0-L7*/	"","","","","","","","bmc-ready",
 	/*M0-M7*/	"","","","","","","","",
-	/*N0-N7*/	"fpga-debug-enable","","","","","","","",
+	/*N0-N7*/	"pch-reset","","","","","flash-write-override","","",
 	/*O0-O7*/	"","","","","","","","",
 	/*P0-P7*/	"","","","","","","","bmc-hb",
 	/*Q0-Q7*/	"","","","","","","pch-ready","",
-- 
2.43.0

[PATCH v8 5/9] ARM: dts: aspeed: system1: Reduce sgpio speed

[Ninad Palsule]

Reduce sgpio speed to improve stability with the current PCB layout.

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index 5567e24ff99b..e02ff50fb48e 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -401,7 +401,7 @@ &emmc {
 &sgpiom0 {
 	status = "okay";
 	ngpios = <128>;
-	bus-frequency = <1000000>;
+	bus-frequency = <500000>;
 };
 
 &ibt {
-- 
2.43.0

[PATCH v8 6/9] ARM: dts: aspeed: system1: Update LED gpio name

[Ninad Palsule]

Rename LEDs with meaningful names for easier identification.

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 .../dts/aspeed/aspeed-bmc-ibm-system1.dts     | 36 +++++++++----------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index e02ff50fb48e..56357dda4b0a 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -116,63 +116,63 @@ vga_memory: region@bf000000 {
 	leds {
 		compatible = "gpio-leds";
 
-		led-0 {
+		led-bmc-ready {
 			gpios = <&gpio0 ASPEED_GPIO(L, 7) GPIO_ACTIVE_HIGH>;
 		};
 
-		led-1 {
+		led-bmc-hb {
 			gpios = <&gpio0 ASPEED_GPIO(P, 7) GPIO_ACTIVE_HIGH>;
 		};
 
-		led-2 {
+		led-rear-enc-fault0 {
 			gpios = <&gpio0 ASPEED_GPIO(S, 6) GPIO_ACTIVE_HIGH>;
 		};
 
-		led-3 {
+		led-rear-enc-id0 {
 			gpios = <&gpio0 ASPEED_GPIO(S, 7) GPIO_ACTIVE_HIGH>;
 		};
 
-		led-4 {
+		led-fan0-fault {
 			gpios = <&pca3 5 GPIO_ACTIVE_LOW>;
 		};
 
-		led-5 {
+		led-fan1-fault {
 			gpios = <&pca3 6 GPIO_ACTIVE_LOW>;
 		};
 
-		led-6 {
+		led-fan2-fault {
 			gpios = <&pca3 7 GPIO_ACTIVE_LOW>;
 		};
 
-		led-7 {
+		led-fan3-fault {
 			gpios = <&pca3 8 GPIO_ACTIVE_LOW>;
 		};
 
-		led-8 {
+		led-fan4-fault {
 			gpios = <&pca3 9 GPIO_ACTIVE_LOW>;
 		};
 
-		led-9 {
+		led-fan5-fault {
 			gpios = <&pca3 10 GPIO_ACTIVE_LOW>;
 		};
 
-		led-a {
+		led-fan6-fault {
 			gpios = <&pca3 11 GPIO_ACTIVE_LOW>;
 		};
 
-		led-b {
+		led-nvmed0-fault {
 			gpios = <&pca4 4 GPIO_ACTIVE_HIGH>;
 		};
 
-		led-c {
+		led-nvmed1-fault {
 			gpios = <&pca4 5 GPIO_ACTIVE_HIGH>;
 		};
 
-		led-d {
+		led-nvmed2-fault {
 			gpios = <&pca4 6 GPIO_ACTIVE_HIGH>;
 		};
 
-		led-e {
+		led-nvmed3-fault {
 			gpios = <&pca4 7 GPIO_ACTIVE_HIGH>;
 		};
 	};
@@ -368,14 +368,14 @@ &gpio0 {
 	/*I0-I7*/	"","","","","","","","",
 	/*J0-J7*/	"","","","","","","","",
 	/*K0-K7*/	"","","","","","","","",
-	/*L0-L7*/	"","","","","","","","bmc-ready",
+	/*L0-L7*/	"","","","","","","","led-bmc-ready",
 	/*M0-M7*/	"","","","","","","","",
 	/*N0-N7*/	"pch-reset","","","","","flash-write-override","","",
 	/*O0-O7*/	"","","","","","","","",
-	/*P0-P7*/	"","","","","","","","bmc-hb",
+	/*P0-P7*/	"","","","","","","","led-bmc-hb",
 	/*Q0-Q7*/	"","","","","","","pch-ready","",
 	/*R0-R7*/	"","","","","","","","",
-	/*S0-S7*/	"","","","","","","rear-enc-fault0","rear-enc-id0",
+	/*S0-S7*/	"","","","","","","led-rear-enc-fault0","led-rear-enc-id0",
 	/*T0-T7*/	"","","","","","","","",
 	/*U0-U7*/	"","","","","","","","",
 	/*V0-V7*/	"","rtc-battery-voltage-read-enable","","power-chassis-control","","","","",
-- 
2.43.0

[PATCH v8 7/9] ARM: dts: aspeed: system1: Remove VRs max8952

[Ninad Palsule]

Removing voltage regulators max8952 from device tree. Those are fully
controlled by hardware and firmware should not touch them.

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 .../dts/aspeed/aspeed-bmc-ibm-system1.dts     | 34 -------------------
 1 file changed, 34 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index 56357dda4b0a..7d9f6a1b2637 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -486,23 +486,6 @@ eeprom@50 {
 		compatible = "atmel,24c64";
 		reg = <0x50>;
 	};
-
-	regulator@60 {
-		compatible = "maxim,max8952";
-		reg = <0x60>;
-
-		max8952,default-mode = <0>;
-		max8952,dvs-mode-microvolt = <1250000>, <1200000>,
-						<1050000>, <950000>;
-		max8952,sync-freq = <0>;
-		max8952,ramp-speed = <0>;
-
-		regulator-name = "VR_v77_1v4";
-		regulator-min-microvolt = <770000>;
-		regulator-max-microvolt = <1400000>;
-		regulator-always-on;
-		regulator-boot-on;
-	};
 };
 
 &i2c1 {
@@ -1198,23 +1181,6 @@ eeprom@50 {
 		compatible = "atmel,24c64";
 		reg = <0x50>;
 	};
-
-	regulator@60 {
-		compatible = "maxim,max8952";
-		reg = <0x60>;
-
-		max8952,default-mode = <0>;
-		max8952,dvs-mode-microvolt = <1250000>, <1200000>,
-						<1050000>, <950000>;
-		max8952,sync-freq = <0>;
-		max8952,ramp-speed = <0>;
-
-		regulator-name = "VR_v77_1v4";
-		regulator-min-microvolt = <770000>;
-		regulator-max-microvolt = <1400000>;
-		regulator-always-on;
-		regulator-boot-on;
-	};
 };
 
 &i2c11 {
-- 
2.43.0

[PATCH v8 8/9] ARM: dts: aspeed: system1: Mark GPIO line high/low

[Ninad Palsule]

- Mark following GPIO lines as input high:
  - GPIOL4 (reset PCH registers)
  - GPIOL5 (reset portition of intel ME)
- Mark isolate errors from cpu1 gpio (GPIOO6) as active low output.
- The fan controller reset line should be active high.

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 .../dts/aspeed/aspeed-bmc-ibm-system1.dts     | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index 7d9f6a1b2637..00b091bc7da9 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -383,6 +383,34 @@ &gpio0 {
 	/*X0-X7*/	"fpga-pgood","power-chassis-good","pch-pgood","","","","","",
 	/*Y0-Y7*/	"","","","","","","","",
 	/*Z0-Z7*/	"","","","","","","","";
+
+	pin-gpio-hog-0 {
+		gpio-hog;
+		gpios = <ASPEED_GPIO(L, 4) GPIO_ACTIVE_HIGH>;
+		input;
+		line-name = "RST_RTCRST_N";
+	};
+
+	pin-gpio-hog-1 {
+		gpio-hog;
+		gpios = <ASPEED_GPIO(L, 5) GPIO_ACTIVE_HIGH>;
+		input;
+		line-name = "RST_SRTCRST_N";
+	};
+
+	pin-gpio-hog-2 {
+		gpio-hog;
+		gpios = <ASPEED_GPIO(L, 6) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "BMC_FAN_E3_SVC_PEX_INT_N";
+	};
+
+	pin-gpio-hog-3 {
+		gpio-hog;
+		gpios = <ASPEED_GPIO(O, 6) GPIO_ACTIVE_LOW>;
+		output-low;
+		line-name = "isolate_errs_cpu1";
+	};
 };
 
 &emmc_controller {
-- 
2.43.0

[PATCH v8 9/9] ARM: dts: aspeed: system1: Disable gpio pull down

[Ninad Palsule]

Disable internal pull down for the following GPIO lines.
- GPIOL4 - Reset PCH registers in the rtc.
- GPIOL5 - Reset portition of Intel ME
- GPIOL6 - FM smi active
- GPIOL7 - psu all dc power good.

Reviewed-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Ninad Palsule <ninad@linux.ibm.com>
---
 .../dts/aspeed/aspeed-bmc-ibm-system1.dts     | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
index 00b091bc7da9..c8267c97a44e 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-system1.dts
@@ -355,7 +355,35 @@ &uhci {
 	status = "okay";
 };
 
+&pinctrl {
+	pinctrl_gpiol4_unbiased: gpiol4 {
+		pins = "C15";
+		bias-disable;
+	};
+
+	pinctrl_gpiol5_unbiased: gpiol5 {
+		pins = "F15";
+		bias-disable;
+	};
+
+	pinctrl_gpiol6_unbiased: gpiol6 {
+		pins = "B14";
+		bias-disable;
+	};
+
+	pinctrl_gpiol7_unbiased: gpiol7 {
+		pins = "C14";
+		bias-disable;
+	};
+};
+
 &gpio0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpiol4_unbiased
+		&pinctrl_gpiol5_unbiased
+		&pinctrl_gpiol6_unbiased
+		&pinctrl_gpiol7_unbiased>;
+
 	gpio-line-names =
 	/*A0-A7*/	"","","","","","","","",
 	/*B0-B7*/	"","","","","bmc-tpm-reset","","","",
-- 
2.43.0