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[61.220.246.151]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82f8e981a0asm14456484b3a.3.2026.04.21.06.03.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 06:03:50 -0700 (PDT) From: Fred Chen To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/1] ARM: dts: aspeed: santabarbara: Add system monitoring GPIOs Date: Tue, 21 Apr 2026 21:03:41 +0800 Message-ID: <20260421130344.2751662-2-fredchen.openbmc@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260421130344.2751662-1-fredchen.openbmc@gmail.com> References: <20260421130344.2751662-1-fredchen.openbmc@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add several GPIO expanders to the Santabarbara platform, with ioexp0 (0x20) configured to aggregate interrupt signals from downstream expanders to optimize sideband pin usage. The new GPIO nodes provide support for: - NIC1-4 power good monitoring, reset control, and fault detection - Switch PEX power good signals and hardware SKU/Revision IDs - Cable presence detection and selection for four SPI flashes - System power fault alert via SGPIO and E1S GPIO expander interrupt Signed-off-by: Fred Chen --- .../aspeed-bmc-facebook-santabarbara.dts | 125 +++++++++++++++++- 1 file changed, 124 insertions(+), 1 deletion(-) 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 0a3e2e241063..2a822e38f091 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts @@ -616,6 +616,8 @@ gpio@74 { reg =3D <0x74>; gpio-controller; #gpio-cells =3D <2>; + interrupt-parent =3D <&sgpiom0>; + interrupts =3D <146 IRQ_TYPE_LEVEL_LOW>; gpio-line-names =3D "P12V_E1S_ADC_ALERT","BUFF0_100M_LOSB_PLD", "E1S_BP_SKU_ID0","E1S_BP_SKU_ID1", @@ -1335,6 +1337,112 @@ eeprom@50 { &i2c12 { status =3D "okay"; =20 + ioexp0: gpio@20 { + compatible =3D "nxp,pca9555"; + reg =3D <0x20>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-controller; + #interrupt-cells =3D <2>; + interrupt-parent =3D <&sgpiom0>; + interrupts =3D <148 IRQ_TYPE_LEVEL_LOW>; + gpio-line-names =3D + "IOEXP_21h_INT_N","IOEXP_22h_INT_N", + "IOEXP_23h_INT_N","IOEXP_24h_INT_N", + "IOEXP_25h_INT_N","IOEXP_26h_INT_N", + "IOEXP_27h_INT_N","SWB_PWR_FAULT_N", + "","","","", + "","","",""; + }; + + gpio@21 { + compatible =3D "nxp,pca9555"; + reg =3D <0x21>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-parent =3D <&ioexp0>; + interrupts =3D <0 IRQ_TYPE_LEVEL_LOW>; + gpio-line-names =3D + "PDB_PRSNT_J1_N","PDB_PRSNT_J2_N", + "PRSNT_NIC1_N","PRSNT_NIC2_N", + "PRSNT_NIC3_N","PRSNT_NIC4_N", + "","", + "CBL_PRSNT_MCIO_0_N","CBL_PRSNT_MCIO_1_N", + "CBL_PRSNT_MCIO_2_N","CBL_PRSNT_MCIO_3_N", + "","","",""; + }; + + gpio@22 { + compatible =3D "nxp,pca9555"; + reg =3D <0x22>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-parent =3D <&ioexp0>; + interrupts =3D <1 IRQ_TYPE_LEVEL_LOW>; + gpio-line-names =3D + "SWB_PWRGD_P3V3_AUX","SWB_PWRGD_P1V8_PEX", + "SWB_PWRGD_P1V8_AUX","SWB_PWRGD_P5V", + "SWB_PWRGD_P1V5_PEX","SWB_PWRGD_P1V2_PEX", + "SWB_PWRGD_P0V895_PEX","SWB_PWRGD_P0V81_PEX_0", + "SWB_PWRGD_P0V81_PEX_1","SWB_PWRGD_P0V81_REFCLK", + "SWB_PWRGD_MODULE","", + "","","",""; + }; + + gpio@24 { + compatible =3D "nxp,pca9555"; + reg =3D <0x24>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-parent =3D <&ioexp0>; + interrupts =3D <3 IRQ_TYPE_LEVEL_LOW>; + gpio-line-names =3D + "RST_PERST_NIC1_N","RST_PERST_NIC2_N", + "RST_PERST_NIC3_N","RST_PERST_NIC4_N", + "RST_PERST_MCIO_0_N","RST_PERST_MCIO_1_N", + "RST_PERST_MCIO_2_N","RST_PERST_MCIO_3_N", + "FM_P3V3_NIC1_FAULT_N","FM_P3V3_NIC2_FAULT_N", + "FM_P3V3_NIC3_FAULT_N","FM_P3V3_NIC4_FAULT_N", + "PWRGD_P12V_NIC1","PWRGD_P12V_NIC2", + "PWRGD_P12V_NIC3","PWRGD_P12V_NIC4"; + }; + + gpio@25 { + compatible =3D "nxp,pca9555"; + reg =3D <0x25>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-parent =3D <&ioexp0>; + interrupts =3D <4 IRQ_TYPE_LEVEL_LOW>; + gpio-line-names =3D + "NIC1_MAIN_R_PWR_EN","NIC2_MAIN_R_PWR_EN", + "NIC3_MAIN_R_PWR_EN","NIC4_MAIN_R_PWR_EN", + "FM_PLD_NIC1_AUX_PWR_EN","FM_PLD_NIC2_AUX_PWR_EN", + "FM_PLD_NIC3_AUX_PWR_EN","FM_PLD_NIC4_AUX_PWR_EN", + "PWRGD_NIC1","PWRGD_NIC2", + "PWRGD_NIC3","PWRGD_NIC4", + "PWRGD_P3V3_NIC1","PWRGD_P3V3_NIC2", + "PWRGD_P3V3_NIC3","PWRGD_P3V3_NIC4"; + }; + + gpio@26 { + compatible =3D "nxp,pca9555"; + reg =3D <0x26>; + gpio-controller; + #gpio-cells =3D <2>; + interrupt-parent =3D <&ioexp0>; + interrupts =3D <5 IRQ_TYPE_LEVEL_LOW>; + gpio-line-names =3D + "SWB_SKU_ID_0","SWB_SKU_ID_1", + "SWB_SKU_ID_2","SWB_SKU_ID_3", + "SWB_REV_ID_0","SWB_REV_ID_1", + "SWB_REV_ID_2","", + "RST_PLD_PEX_PERST_N","CPLD_MB_PWR_EN", + "RST_PERST_SWB_R_N","SWB_LEAK_DETECT", + "PEX_SYS_ERR_FPGA","PRSNT_SWB_LEAK_CABLE_N", + "",""; + }; + gpio@27 { compatible =3D "nxp,pca9555"; reg =3D <0x27>; @@ -1349,6 +1457,21 @@ gpio@27 { "SPI_MUX_SEL","","",""; }; =20 + gpio@28 { + compatible =3D "nxp,pca9555"; + reg =3D <0x28>; + gpio-controller; + #gpio-cells =3D <2>; + gpio-line-names =3D + "SCO_UART_MUX_SEL0","SCO_UART_MUX_SEL1", + "SPI_PROG_PL12_SEL","SPI_PROG_PL34_SEL", + "","","","", + "I3C_HUB_3_MUX_SEL_PLD","", + "SPI_PROG_PL12_EN_N","SPI_PROG_PL34_EN_N", + "SCO1_SPI_SEL","SCO2_SPI_SEL", + "SCO3_SPI_SEL","SCO4_SPI_SEL"; + }; + // SWB FRU eeprom@52 { compatible =3D "atmel,24c64"; @@ -1776,7 +1899,7 @@ &sgpiom0 { "MB_SKU_ID_1","PASSWORD_CLEAR", "MB_SKU_ID_2","", "MB_SKU_ID_3","", - "","BIOS_DEBUG_MODE", + "SYS_PWR_FAULT_ALERT","BIOS_DEBUG_MODE", /*H0-H3 line 112-119*/ "FM_IOEXP_U538_INT_N","", "FM_IOEXP_U539_INT_N","FM_MODULE_PWR_EN_N_1B", --=20 2.52.0