[PATCH v1 1/2] ARM: dts: aspeed: santabarbara: Add swb IO expander and gpio line names
From: Fred Chen <hidden>
Date: 2025-11-25 13:59:41
Also in:
linux-aspeed, linux-devicetree, lkml
Subsystem:
arm/aspeed machine support, the rest · Maintainers:
Joel Stanley, Andrew Jeffery, Linus Torvalds
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 <redacted> --- .../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