[PATCH v1 0/2] Revise Meta Santabarbara devicetree

[PATCH v1 0/2] Revise Meta Santabarbara devicetree

[Fred Chen]

Summary:
Revise linux device tree entry related to Meta (Facebook) Santabarbara.
- Add IO expander node on the switch board  
- Add SGPIO line names to control ASIC module power  
- Add IPMB node for OCP debug card
Fred Chen (2):
  ARM: dts: aspeed: santabarbara: Add swb IO expander and gpio line
    names
  ARM: dts: aspeed: santabarbara: Enable ipmb device for OCP debug card

 .../aspeed-bmc-facebook-santabarbara.dts      | 29 ++++++++++++++++---
 1 file changed, 25 insertions(+), 4 deletions(-)

-- 
2.49.0

[PATCH v1 1/2] ARM: dts: aspeed: santabarbara: Add swb IO expander and gpio line names

[Fred Chen]

Add IO expander emulated by the switch board CPLD to handle UART and SPI
mux control signals. Also add SGPIO labels with FM_MODULE_PWR_EN_N_*
signals, which control power to each ASIC module individually.

Signed-off-by: Fred Chen <fredchen.openbmc@gmail.com>
---
 .../aspeed-bmc-facebook-santabarbara.dts      | 22 +++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts
index f74f463cc878..4312ead311df 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts
@@ -1328,6 +1328,20 @@ eeprom@50 {
 &i2c12 {
 	status = "okay";
 
+	gpio@27 {
+		compatible = "nxp,pca9555";
+		reg = <0x27>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"PEX0_MODE_SEL1_R","PEX0_MODE_SEL2_R",
+			"PEX0_MODE_SEL3_R","PEX0_MODE_SEL4_R",
+			"","","","",
+			"UART_MUX_SEL","RST_SMB_NIC_R_N",
+			"RST_SMB_N","RST_CP2102N_N",
+			"SPI_MUX_SEL","","","";
+	};
+
 	// SWB FRU
 	eeprom@52 {
 		compatible = "atmel,24c64";
@@ -1758,11 +1772,11 @@ &sgpiom0 {
 	"","BIOS_DEBUG_MODE",
 	/*H0-H3 line 112-119*/
 	"FM_IOEXP_U538_INT_N","",
-	"FM_IOEXP_U539_INT_N","",
-	"FM_IOEXP_U540_INT_N","",
-	"FM_IOEXP_U541_INT_N","",
+	"FM_IOEXP_U539_INT_N","FM_MODULE_PWR_EN_N_1B",
+	"FM_IOEXP_U540_INT_N","FM_MODULE_PWR_EN_N_2B",
+	"FM_IOEXP_U541_INT_N","FM_MODULE_PWR_EN_N_3B",
 	/*H4-H7 line 120-127*/
-	"FM_IOEXP_PDB2_U1003_INT_N","",
+	"FM_IOEXP_PDB2_U1003_INT_N","FM_MODULE_PWR_EN_N_4B",
 	"","",
 	"","",
 	"FM_MAIN_PWREN_RMC_EN_ISO_R","",
-- 
2.49.0

[PATCH v1 2/2] ARM: dts: aspeed: santabarbara: Enable ipmb device for OCP debug card

[Fred Chen]

Add an IPMB node for OCP debug card to support IPMI communication.

Signed-off-by: Fred Chen <fredchen.openbmc@gmail.com>
---
 .../boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts   | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts
index 4312ead311df..0a3e2e241063 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts
@@ -845,7 +845,14 @@ temperature-sensor@49 {
 };
 
 &i2c7 {
+	multi-master;
 	status = "okay";
+
+	ipmb@10 {
+		compatible = "ipmb-dev";
+		reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
+		i2c-protocol;
+	};
 };
 
 &i2c8 {
-- 
2.49.0

Re: [PATCH v1 0/2] Revise Meta Santabarbara devicetree

[Andrew Jeffery]

On Tue, 25 Nov 2025 21:59:29 +0800, Fred Chen wrote:
> Summary:
> Revise linux device tree entry related to Meta (Facebook) Santabarbara.
> - Add IO expander node on the switch board
> - Add SGPIO line names to control ASIC module power
> - Add IPMB node for OCP debug card
> Fred Chen (2):
>   ARM: dts: aspeed: santabarbara: Add swb IO expander and gpio line
>     names
>   ARM: dts: aspeed: santabarbara: Enable ipmb device for OCP debug card
> 
> [...]

Thanks, I've applied this to the BMC tree.

-- 
Andrew Jeffery <andrew@codeconstruct.com.au>