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

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Message-ID: <20251125135934.3138781-2-fredchen.openbmc@gmail.com>
Date: Tue, 25 Nov 2025 21:59:30 +0800
From: Fred Chen <fredchen.openbmc@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Joel Stanley <joel@....id.au>,
	Andrew Jeffery <andrew@...econstruct.com.au>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-aspeed@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/2] ARM: dts: aspeed: santabarbara: Add swb IO expander and gpio line names

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@...il.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