{"id":2225707,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2225707/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-aspeed/patch/20260421130344.2751662-2-fredchen.openbmc@gmail.com/","project":{"id":57,"url":"http://patchwork.ozlabs.org/api/1.2/projects/57/?format=json","name":"Linux ASPEED SoC development","link_name":"linux-aspeed","list_id":"linux-aspeed.lists.ozlabs.org","list_email":"linux-aspeed@lists.ozlabs.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260421130344.2751662-2-fredchen.openbmc@gmail.com>","list_archive_url":null,"date":"2026-04-21T13:03:41","name":"[v2,1/1] ARM: dts: aspeed: santabarbara: Add system monitoring GPIOs","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"6b36e3618f793326dd6e5bc37033e231eec0f24b","submitter":{"id":91014,"url":"http://patchwork.ozlabs.org/api/1.2/people/91014/?format=json","name":"Fred Chen","email":"fredchen.openbmc@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-aspeed/patch/20260421130344.2751662-2-fredchen.openbmc@gmail.com/mbox/","series":[{"id":500799,"url":"http://patchwork.ozlabs.org/api/1.2/series/500799/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-aspeed/list/?series=500799","date":"2026-04-21T13:03:40","name":"ARM: dts: aspeed: santabarbara: Add system monitoring GPIOs","version":2,"mbox":"http://patchwork.ozlabs.org/series/500799/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225707/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225707/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-aspeed@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com 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(PDT)","From":"Fred Chen ","To":"Rob Herring ,\n\tKrzysztof Kozlowski ,\n\tConor Dooley ,\n\tJoel Stanley ,\n\tAndrew Jeffery ,\n\tdevicetree@vger.kernel.org,\n\tlinux-arm-kernel@lists.infradead.org,\n\tlinux-aspeed@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org","Subject":"[PATCH v2 1/1] ARM: dts: aspeed: santabarbara: Add system monitoring\n 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>","X-Mailing-List":"linux-aspeed@lists.ozlabs.org","List-Id":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","Precedence":"list","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Spam-Status":"No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,\n\tSPF_HELO_NONE,SPF_PASS,WEIRD_QUOTING autolearn=disabled version=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"Add several GPIO expanders to the Santabarbara platform, with ioexp0\n(0x20) configured to aggregate interrupt signals from downstream\nexpanders to optimize sideband pin usage.\n\nThe new GPIO nodes provide support for:\n- NIC1-4 power good monitoring, reset control, and fault detection\n- Switch PEX power good signals and hardware SKU/Revision IDs\n- Cable presence detection and selection for four SPI flashes\n- System power fault alert via SGPIO and E1S GPIO expander interrupt\n\nSigned-off-by: Fred Chen \n---\n .../aspeed-bmc-facebook-santabarbara.dts | 125 +++++++++++++++++-\n 1 file changed, 124 insertions(+), 1 deletion(-)","diff":"diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts\nindex 0a3e2e241063..2a822e38f091 100644\n--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts\n+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-santabarbara.dts\n@@ -616,6 +616,8 @@ gpio@74 {\n \t\t\t\treg = <0x74>;\n \t\t\t\tgpio-controller;\n \t\t\t\t#gpio-cells = <2>;\n+\t\t\t\tinterrupt-parent = <&sgpiom0>;\n+\t\t\t\tinterrupts = <146 IRQ_TYPE_LEVEL_LOW>;\n \t\t\t\tgpio-line-names =\n \t\t\t\t\t\"P12V_E1S_ADC_ALERT\",\"BUFF0_100M_LOSB_PLD\",\n \t\t\t\t\t\"E1S_BP_SKU_ID0\",\"E1S_BP_SKU_ID1\",\n@@ -1335,6 +1337,112 @@ eeprom@50 {\n &i2c12 {\n \tstatus = \"okay\";\n \n+\tioexp0: gpio@20 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x20>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tinterrupt-controller;\n+\t\t#interrupt-cells = <2>;\n+\t\tinterrupt-parent = <&sgpiom0>;\n+\t\tinterrupts = <148 IRQ_TYPE_LEVEL_LOW>;\n+\t\tgpio-line-names =\n+\t\t\t\"IOEXP_21h_INT_N\",\"IOEXP_22h_INT_N\",\n+\t\t\t\"IOEXP_23h_INT_N\",\"IOEXP_24h_INT_N\",\n+\t\t\t\"IOEXP_25h_INT_N\",\"IOEXP_26h_INT_N\",\n+\t\t\t\"IOEXP_27h_INT_N\",\"SWB_PWR_FAULT_N\",\n+\t\t\t\"\",\"\",\"\",\"\",\n+\t\t\t\"\",\"\",\"\",\"\";\n+\t};\n+\n+\tgpio@21 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x21>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tinterrupt-parent = <&ioexp0>;\n+\t\tinterrupts = <0 IRQ_TYPE_LEVEL_LOW>;\n+\t\tgpio-line-names =\n+\t\t\t\"PDB_PRSNT_J1_N\",\"PDB_PRSNT_J2_N\",\n+\t\t\t\"PRSNT_NIC1_N\",\"PRSNT_NIC2_N\",\n+\t\t\t\"PRSNT_NIC3_N\",\"PRSNT_NIC4_N\",\n+\t\t\t\"\",\"\",\n+\t\t\t\"CBL_PRSNT_MCIO_0_N\",\"CBL_PRSNT_MCIO_1_N\",\n+\t\t\t\"CBL_PRSNT_MCIO_2_N\",\"CBL_PRSNT_MCIO_3_N\",\n+\t\t\t\"\",\"\",\"\",\"\";\n+\t};\n+\n+\tgpio@22 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x22>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tinterrupt-parent = <&ioexp0>;\n+\t\tinterrupts = <1 IRQ_TYPE_LEVEL_LOW>;\n+\t\tgpio-line-names =\n+\t\t\t\"SWB_PWRGD_P3V3_AUX\",\"SWB_PWRGD_P1V8_PEX\",\n+\t\t\t\"SWB_PWRGD_P1V8_AUX\",\"SWB_PWRGD_P5V\",\n+\t\t\t\"SWB_PWRGD_P1V5_PEX\",\"SWB_PWRGD_P1V2_PEX\",\n+\t\t\t\"SWB_PWRGD_P0V895_PEX\",\"SWB_PWRGD_P0V81_PEX_0\",\n+\t\t\t\"SWB_PWRGD_P0V81_PEX_1\",\"SWB_PWRGD_P0V81_REFCLK\",\n+\t\t\t\"SWB_PWRGD_MODULE\",\"\",\n+\t\t\t\"\",\"\",\"\",\"\";\n+\t};\n+\n+\tgpio@24 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x24>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tinterrupt-parent = <&ioexp0>;\n+\t\tinterrupts = <3 IRQ_TYPE_LEVEL_LOW>;\n+\t\tgpio-line-names =\n+\t\t\t\"RST_PERST_NIC1_N\",\"RST_PERST_NIC2_N\",\n+\t\t\t\"RST_PERST_NIC3_N\",\"RST_PERST_NIC4_N\",\n+\t\t\t\"RST_PERST_MCIO_0_N\",\"RST_PERST_MCIO_1_N\",\n+\t\t\t\"RST_PERST_MCIO_2_N\",\"RST_PERST_MCIO_3_N\",\n+\t\t\t\"FM_P3V3_NIC1_FAULT_N\",\"FM_P3V3_NIC2_FAULT_N\",\n+\t\t\t\"FM_P3V3_NIC3_FAULT_N\",\"FM_P3V3_NIC4_FAULT_N\",\n+\t\t\t\"PWRGD_P12V_NIC1\",\"PWRGD_P12V_NIC2\",\n+\t\t\t\"PWRGD_P12V_NIC3\",\"PWRGD_P12V_NIC4\";\n+\t};\n+\n+\tgpio@25 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x25>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tinterrupt-parent = <&ioexp0>;\n+\t\tinterrupts = <4 IRQ_TYPE_LEVEL_LOW>;\n+\t\tgpio-line-names =\n+\t\t\t\"NIC1_MAIN_R_PWR_EN\",\"NIC2_MAIN_R_PWR_EN\",\n+\t\t\t\"NIC3_MAIN_R_PWR_EN\",\"NIC4_MAIN_R_PWR_EN\",\n+\t\t\t\"FM_PLD_NIC1_AUX_PWR_EN\",\"FM_PLD_NIC2_AUX_PWR_EN\",\n+\t\t\t\"FM_PLD_NIC3_AUX_PWR_EN\",\"FM_PLD_NIC4_AUX_PWR_EN\",\n+\t\t\t\"PWRGD_NIC1\",\"PWRGD_NIC2\",\n+\t\t\t\"PWRGD_NIC3\",\"PWRGD_NIC4\",\n+\t\t\t\"PWRGD_P3V3_NIC1\",\"PWRGD_P3V3_NIC2\",\n+\t\t\t\"PWRGD_P3V3_NIC3\",\"PWRGD_P3V3_NIC4\";\n+\t};\n+\n+\tgpio@26 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x26>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tinterrupt-parent = <&ioexp0>;\n+\t\tinterrupts = <5 IRQ_TYPE_LEVEL_LOW>;\n+\t\tgpio-line-names =\n+\t\t\t\"SWB_SKU_ID_0\",\"SWB_SKU_ID_1\",\n+\t\t\t\"SWB_SKU_ID_2\",\"SWB_SKU_ID_3\",\n+\t\t\t\"SWB_REV_ID_0\",\"SWB_REV_ID_1\",\n+\t\t\t\"SWB_REV_ID_2\",\"\",\n+\t\t\t\"RST_PLD_PEX_PERST_N\",\"CPLD_MB_PWR_EN\",\n+\t\t\t\"RST_PERST_SWB_R_N\",\"SWB_LEAK_DETECT\",\n+\t\t\t\"PEX_SYS_ERR_FPGA\",\"PRSNT_SWB_LEAK_CABLE_N\",\n+\t\t\t\"\",\"\";\n+\t};\n+\n \tgpio@27 {\n \t\tcompatible = \"nxp,pca9555\";\n \t\treg = <0x27>;\n@@ -1349,6 +1457,21 @@ gpio@27 {\n \t\t\t\"SPI_MUX_SEL\",\"\",\"\",\"\";\n \t};\n \n+\tgpio@28 {\n+\t\tcompatible = \"nxp,pca9555\";\n+\t\treg = <0x28>;\n+\t\tgpio-controller;\n+\t\t#gpio-cells = <2>;\n+\t\tgpio-line-names =\n+\t\t\t\"SCO_UART_MUX_SEL0\",\"SCO_UART_MUX_SEL1\",\n+\t\t\t\"SPI_PROG_PL12_SEL\",\"SPI_PROG_PL34_SEL\",\n+\t\t\t\"\",\"\",\"\",\"\",\n+\t\t\t\"I3C_HUB_3_MUX_SEL_PLD\",\"\",\n+\t\t\t\"SPI_PROG_PL12_EN_N\",\"SPI_PROG_PL34_EN_N\",\n+\t\t\t\"SCO1_SPI_SEL\",\"SCO2_SPI_SEL\",\n+\t\t\t\"SCO3_SPI_SEL\",\"SCO4_SPI_SEL\";\n+\t};\n+\n \t// SWB FRU\n \teeprom@52 {\n \t\tcompatible = \"atmel,24c64\";\n@@ -1776,7 +1899,7 @@ &sgpiom0 {\n \t\"MB_SKU_ID_1\",\"PASSWORD_CLEAR\",\n \t\"MB_SKU_ID_2\",\"\",\n \t\"MB_SKU_ID_3\",\"\",\n-\t\"\",\"BIOS_DEBUG_MODE\",\n+\t\"SYS_PWR_FAULT_ALERT\",\"BIOS_DEBUG_MODE\",\n \t/*H0-H3 line 112-119*/\n \t\"FM_IOEXP_U538_INT_N\",\"\",\n \t\"FM_IOEXP_U539_INT_N\",\"FM_MODULE_PWR_EN_N_1B\",\n","prefixes":["v2","1/1"]}