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GET /api/patches/2231229/?format=api
{ "id": 2231229, "url": "http://patchwork.ozlabs.org/api/patches/2231229/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260430121354.6253-1-zain_zhou@realsil.com.cn/", "project": { "id": 42, "url": "http://patchwork.ozlabs.org/api/projects/42/?format=api", "name": "Linux GPIO development", "link_name": "linux-gpio", "list_id": "linux-gpio.vger.kernel.org", "list_email": "linux-gpio@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260430121354.6253-1-zain_zhou@realsil.com.cn>", "list_archive_url": null, "date": "2026-04-30T12:13:53", "name": "[1/2] dt-bindings: i3c: add binding for Realtek RTS490x I3C HUB", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c90535732d0918080426f30f9c841743e835b6b4", "submitter": { "id": 93291, "url": "http://patchwork.ozlabs.org/api/people/93291/?format=api", "name": "", "email": "zain_zhou@realsil.com.cn" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260430121354.6253-1-zain_zhou@realsil.com.cn/mbox/", "series": [ { "id": 502291, "url": "http://patchwork.ozlabs.org/api/series/502291/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/list/?series=502291", "date": "2026-04-30T12:13:54", "name": "[1/2] dt-bindings: i3c: add binding for Realtek RTS490x I3C HUB", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502291/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231229/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231229/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-gpio+bounces-35913-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-gpio@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=realsil.com.cn header.i=@realsil.com.cn\n header.a=rsa-sha256 header.s=dkim header.b=L85jSuK3;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; 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a=rsa-sha256; c=relaxed/relaxed; d=realsil.com.cn;\n\ts=dkim; t=1777551247;\n\tbh=xQiUFbL927REFpXPP+Oig6c2w+RJXznB51XY0qpfYXw=;\n\th=From:To:CC:Subject:Date:Message-ID:MIME-Version:\n\t Content-Transfer-Encoding:Content-Type;\n\tb=L85jSuK3szOkmUGzom2gD+TEWI2z+7QkCF8/zhW3KnePYXwhc+fgpUys9C7BZQElK\n\t vbPpTNMdGdpl9mrdIwmbAu4VHY9TKileC/YyzNVHfhKrKUknQBqd1GIGKeKQFYgODE\n\t 7S+N9fAyrk7gQfR2CHJo3Jd5/sP5HLpgoQyJjxfVOAY5QbXLZaVPhFBZ0LjHpAuLBx\n\t DLKClQzBJqrGTBt+smr4yaiW/PAU7lMoND5VzieBdQTIVrK0F8gS/CIWQTktMPie++\n\t sA27Qv03v3ny4/CbubuWeGbocCoMmpqosCdyLHo+B+FDwRQdsvwjNRfFCShQpNAu8M\n\t SSalvQzrUUMLw==", "From": "<zain_zhou@realsil.com.cn>", "To": "<linux-staging@lists.linux.dev>, <linux-i3c@lists.infradead.org>,\n <devicetree@vger.kernel.org>", "CC": "<gregkh@linuxfoundation.org>, <alexandre.belloni@bootlin.com>,\n <Frank.Li@nxp.com>, <robh@kernel.org>, <krzk+dt@kernel.org>,\n <conor+dt@kernel.org>, <linusw@kernel.org>, <brgl@kernel.org>,\n <linux-gpio@vger.kernel.org>, <linux-kernel@vger.kernel.org>,\n zain_zhou\n\t<zain_zhou@realsil.com.cn>", "Subject": "[PATCH 1/2] dt-bindings: i3c: add binding for Realtek RTS490x I3C HUB", "Date": "Thu, 30 Apr 2026 20:13:53 +0800", "Message-ID": "<20260430121354.6253-1-zain_zhou@realsil.com.cn>", "X-Mailer": "git-send-email 2.25.1", "Precedence": "bulk", "X-Mailing-List": "linux-gpio@vger.kernel.org", "List-Id": "<linux-gpio.vger.kernel.org>", "List-Subscribe": "<mailto:linux-gpio+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-gpio+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "RS-EX-MBS1.realsil.com.cn (172.29.17.101) To\n RS-EX-MBS2.realsil.com.cn (172.29.17.102)" }, "content": "From: zain_zhou <zain_zhou@realsil.com.cn>\n\nAdd DT binding schema for Realtek RTS490x series I3C HUB devices.\n\nThe binding describes configuration properties for:\n - LDO enable/disable and voltage level per port group\n - Pull-up resistance per port group\n - IO driver strength per port\n - Per target-port mode (I3C/SMBus/GPIO/disabled), pull-up,\n IO mode, SMBus clock frequency and polling interval\n - Hub network always-I3C mode\n - Hardware identification via CSEL pin (id) and CP1 pins (id-cp1)\n\nSigned-off-by: zain_zhou <zain_zhou@realsil.com.cn>\n---\n .../bindings/i3c/realtek,rts490x-i3c-hub.yaml | 410 ++++++++++++++++++\n MAINTAINERS | 6 +\n 2 files changed, 416 insertions(+)\n create mode 100644 Documentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.yaml", "diff": "diff --git a/Documentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.yaml b/Documentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.yaml\nnew file mode 100644\nindex 000000000000..30295eefee89\n--- /dev/null\n+++ b/Documentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.yaml\n@@ -0,0 +1,410 @@\n+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)\n+%YAML 1.2\n+---\n+$id: http://devicetree.org/schemas/i3c/realtek,rts490x-i3c-hub.yaml#\n+$schema: http://devicetree.org/meta-schemas/core.yaml#\n+\n+title: I3C HUB\n+\n+maintainers:\n+ - zain_zhou <zain_zhou@realsil.com.cn>\n+\n+description: |\n+ I3C HUB is smart device which provides multiple functionality:\n+ * enabling voltage compatibility across I3C Controller and Target devices,\n+ * bus capacitance isolation\n+ * address conflict isolation\n+ * I3C port expansion\n+ * two controllers in a single I3C bus\n+ * I3C and SMBus device compatibility\n+ * GPIO expansion\n+\n+ Having such big number of features, there is a need to have some DT knobs to tell the I3C HUB\n+ driver which features shall be enabled and how they shall be configured. I3C HUB driver read,\n+ validate DT knobs and set corresponding registers with the right way to satisfy user requests from\n+ DT.\n+\n+ All the DT properties for I3C HUB are located under dedicated (for I3C HUB) DT entry. I3C HUB DT\n+ entry structure is aligned with regular I3C device DT entry described in i3c.yaml.\n+\n+allOf:\n+ - $ref: i3c.yaml#\n+\n+properties:\n+ $nodename:\n+ pattern: \"^hub@0,0$\"\n+\n+ cp0-ldo-en:\n+ enum:\n+ - disabled\n+ - enabled\n+ description: |\n+ I3C HUB Controller Port 0 LDO disabling/enabling setting. If enabled, voltage produced by\n+ on-die LDO will be available externally on dedicated pin. This option could be used to supply\n+ external pull-up resistors or for any other purpose which does not cross LDO capabilities.\n+\n+ This property is optional. If not provided, LDO will be disabled.\n+\n+ cp1-ldo-en:\n+ enum:\n+ - disabled\n+ - enabled\n+ description: |\n+ I3C HUB Controller Port 1 LDO disabling/enabling setting. If enabled, voltage produced by\n+ on-die LDO will be available externally on dedicated pin. This option could be used to supply\n+ external pull-up resistors or for any other purpose which does not cross LDO capabilities.\n+\n+ This property is optional. If not provided, LDO will be disabled.\n+\n+ tp0145-ldo-en:\n+ enum:\n+ - disabled\n+ - enabled\n+ description: |\n+ I3C HUB Target Ports 0/1/4/5 LDO disabling/enabling setting. If enabled, voltage produced by\n+ on-die LDO will be available externally on dedicated pin. This option could be used to supply\n+ external pull-up resistors or for any other purpose which does not cross LDO capabilities.\n+\n+ This property is optional. If not provided, LDO will be disabled.\n+\n+ tp2367-ldo-en:\n+ enum:\n+ - disabled\n+ - enabled\n+ description: |\n+ I3C HUB Target Ports 2/3/6/7 LDO disabling/enabling setting. If enabled, voltage produced by\n+ on-die LDO will be available externally on dedicated pin. This option could be used to supply\n+ external pull-up resistors or for any other purpose which does not cross LDO capabilities.\n+\n+ This property is optional. If not provided, LDO will be disabled.\n+\n+ cp0-ldo-volt:\n+ enum:\n+ - 1.0V\n+ - 1.1V\n+ - 1.2V\n+ - 1.8V\n+ description: |\n+ I3C HUB Controller Port 0 LDO setting to control the Controller Port 1 voltage level. This\n+ property is optional.\n+\n+ If not provided, LDO configuration is not modified in I3C HUB.\n+\n+ cp1-ldo-volt:\n+ enum:\n+ - 1.0V\n+ - 1.1V\n+ - 1.2V\n+ - 1.8V\n+ description: |\n+ I3C HUB Controller Port 1 LDO setting to control the Controller Port 1 voltage level. This\n+ property is optional.\n+\n+ If not provided, LDO configuration is not modified in I3C HUB.\n+\n+ tp0145-ldo-volt:\n+ enum:\n+ - disabled\n+ - 1.0V\n+ - 1.1V\n+ - 1.2V\n+ - 1.8V\n+ description: |\n+ I3C HUB Target Ports 0/1/4/5 LDO setting to control the Target Ports 0/1/4/5 voltage level.\n+\n+ If not provided, LDO configuration is not modified in I3C HUB.\n+\n+ tp2367-ldo-volt:\n+ enum:\n+ - disabled\n+ - 1.0V\n+ - 1.1V\n+ - 1.2V\n+ - 1.8V\n+ description: |\n+ I3C HUB Target Ports 2/3/6/7 LDO setting to control the Target Ports 2/3/6/7 voltage level.\n+\n+ If not provided, LDO configuration is not modified in I3C HUB.\n+\n+ tp0145-pullup:\n+ enum:\n+ - disabled\n+ - 250R\n+ - 500R\n+ - 1k\n+ - 2k\n+ description: |\n+ I3C HUB Target Ports 0/1/4/5 pull-up setting to control the Target Ports 0/1/4/5 pull-up\n+ resistance level.\n+\n+ This property is optional. If not provided, pull-up configuration is not modified in I3C HUB.\n+\n+ tp2367-pullup:\n+ enum:\n+ - disabled\n+ - 250R\n+ - 500R\n+ - 1k\n+ - 2k\n+ description: |\n+ I3C HUB Target Ports 2/3/6/7 pull-up setting to control the Target Ports 2/3/6/7 pull-up\n+ resistance level.\n+\n+ This property is optional. If not provided, pull-up configuration is not modified in I3C HUB.\n+\n+ cp0-io-strength:\n+ enum:\n+ - 20Ohms\n+ - 30Ohms\n+ - 40Ohms\n+ - 50Ohms\n+ description: |\n+ I3C HUB Controller Port 0 IO strength setting to control the Controller Port 0 output driver\n+ strength.\n+\n+ This property is optional. If not provided, IO strength configuration is not modified in I3C\n+ HUB.\n+\n+ cp1-io-strength:\n+ enum:\n+ - 20Ohms\n+ - 30Ohms\n+ - 40Ohms\n+ - 50Ohms\n+ description: |\n+ I3C HUB Controller Port 1 IO strength setting to control the Controller Port 1 output driver\n+ strength.\n+\n+ This property is optional. If not provided, IO strength configuration is not modified in I3C\n+ HUB.\n+\n+ tp0145-io-strength:\n+ enum:\n+ - 20Ohms\n+ - 30Ohms\n+ - 40Ohms\n+ - 50Ohms\n+ description: |\n+ I3C HUB Target Ports 0/1/4/5 IO strength setting to control the Target Ports 0/1/4/5 output\n+ driver strength.\n+\n+ This property is optional. If not provided, IO strength configuration is not modified in I3C\n+ HUB.\n+\n+ tp2367-io-strength:\n+ enum:\n+ - 20Ohms\n+ - 30Ohms\n+ - 40Ohms\n+ - 50Ohms\n+ description: |\n+ I3C HUB Target Ports 2/3/6/7 IO strength setting to control the Target Ports 2/3/6/7 output\n+ driver strength.\n+\n+ This property is optional. If not provided, IO strength configuration is not modified in I3C\n+ HUB.\n+\n+ id:\n+ enum:\n+ - 0\n+ - 1\n+ - 3\n+ description: |\n+ I3C HUB ID based on CSEL pin. There are three possible values:\n+ 0 - CP0 is selected as primary Controller Port\n+ 1 - Primary Controller Port is selected by software by writing the REG#56\n+ 3 - CP1 is selected as primary Controller Port\n+\n+ I3C HUB driver reads CSEL pin status (REG#121[5:4]) and tries to find DT node with matching\n+ value in 'id' property.\n+\n+ This property is optional. If not provided, DT node can only be used by the I3C HUB driver if\n+ there is no others with matching 'id' or 'id-cp1'. If there is a multiple DT nodes with no\n+ 'id' property - the first one will be chosen by I3C HUB driver. If there is a multiple DT\n+ nodes with matching 'id' property - the first one will be chosen by I3C HUB driver.\n+\n+ If both 'id' and 'id-cp1' are available, DT node will chosen only when both values match those\n+ read from I3C HUB.\n+\n+ id-cp1:\n+ enum:\n+ - 0\n+ - 1\n+ - 2\n+ - 3\n+ description: |\n+ I3C HUB ID based on CP1 SDA and SCL pins state probed during power on.\n+\n+ I3C HUB driver reads CP1 SDA and SCL pin status and tries to find DT node with matching value\n+ in 'id-cp1' property.\n+\n+ This property is optional. If not provided, DT node can only be used by the I3C HUB\n+ driver if there is no others with matching 'id' or 'id-cp1'. If there is a multiple DT nodes\n+ with no 'id-cp1' property - the first one will be chosen by I3C HUB driver. If there is a\n+ multiple DT nodes with matching 'id-cp1' property - the first one will be chosen by I3C HUB\n+ driver.\n+\n+ If both 'id' and 'id-cp1' are available, DT node will chosen only when both values match those\n+ read from I3C HUB.\n+\n+patternProperties:\n+ \"@[0-9]$\":\n+ type: object\n+ description: |\n+ I3C HUB Target Port child, should be named: target-port@<target-port-id>\n+\n+ properties:\n+ mode:\n+ enum:\n+ - disabled\n+ - i3c\n+ - smbus\n+ - gpio\n+ description: |\n+ I3C HUB Target Port mode setting to control Target Port functionality.\n+\n+ This property is optional. If not provided, Target Port mode configuration is not modified\n+ in I3C HUB.\n+\n+ pullup:\n+ enum:\n+ - disabled\n+ - enabled\n+ description: |\n+ I3C HUB Target Port pull-up setting to disable/enable Target Port pull-up.\n+\n+ This property is optional. If not provided, Target Port pull-up configuration is not\n+ modified in I3C HUB.\n+\n+ always-enable:\n+ type: boolean\n+ description: |\n+ I3C HUB Target Port settings to control the port enable/disable policy.\n+\n+ This property is optional. If not provided, Target Port is enabled only on accessing to\n+ the devices connected to it and the port is disabled automatically after the accessing\n+ is done. If provided, the Target Port is always enabled.\n+\n+ polling-interval-ms:\n+ type: uint32\n+ description: |\n+ I3C HUB Target Port SMBus polling interval in milliseconds.\n+\n+ This property is optional. If not provided or set to 0, polling is disabled and the driver\n+ uses IBI (In-Band Interrupts). If provided with a positive value, polling is enabled for\n+ this Target Port with the given period.Note: this positive value only affects the SMBus\n+ target agent polling. The SMBus controller agent polling interval is computed dynamically\n+ from clock and data length.\n+\n+ clock-frequency:\n+ type: uint32\n+ enum:\n+ - 100000\n+ - 200000\n+ - 400000\n+ - 1000000\n+ description: |\n+ I3C HUB Target Port SMBus clock frequency in Hz.\n+\n+ This property follows the standard I2C 'clock-frequency' semantics.\n+ Applies only when the Target Port mode is set to \"smbus\".\n+ Optional; if not provided, the driver uses 400000 Hz by default.\n+\n+additionalProperties: true\n+\n+examples:\n+ - |\n+ i3c-master@d040000 {\n+ #address-cells = <1>;\n+ #size-cells = <0>;\n+\n+ hub@0,0 {\n+ cp0-ldo-en = \"disabled\";\n+ cp1-ldo-en = \"enabled\";\n+ cp0-ldo-volt = \"1.0V\";\n+ cp1-ldo-volt = \"1.1V\";\n+ tp0145-ldo-en = \"enabled\";\n+ tp2367-ldo-en = \"disabled\";\n+ tp0145-ldo-volt = \"1.2V\";\n+ tp2367-ldo-volt = \"1.8V\";\n+ tp0145-pullup = \"2k\";\n+ tp2367-pullup = \"500R\";\n+ tp0145-io-strength = \"50Ohms\";\n+ tp2367-io-strength = \"30Ohms\";\n+ cp0-io-strength = \"20Ohms\";\n+ cp1-io-strength = \"40Ohms\";\n+\n+ target-port@0 {\n+ mode = \"i3c\";\n+ pullup = \"enabled\";\n+ always_enable;\n+ };\n+ target-port@1 {\n+ mode = \"smbus\";\n+ pullup = \"enabled\";\n+ clock-frequency = <1000000>;\n+ polling-interval-ms = <10>;\n+ backend@10{\n+ compatible = \"i2c-slave-mqueue\";\n+ reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;\n+ };\n+ };\n+ target-port@2 {\n+ mode = \"gpio\";\n+ pullup = \"disabled\";\n+ };\n+ target-port@3 {\n+ mode = \"disabled\";\n+ pullup = \"disabled\";\n+ };\n+ };\n+ };\n+\n+ - |\n+ i3c-master@d040000 {\n+ #address-cells = <1>;\n+ #size-cells = <0>;\n+\n+ hub@70,3C000000100 {\n+ reg = <0x70 0x3C0 0x00000100>;\n+ assigned-address = <0x70>;\n+ dcr = <0xC2>;\n+\n+ cp0-ldo-en = \"disabled\";\n+ cp1-ldo-en = \"enabled\";\n+ cp0-ldo-volt = \"1.0V\";\n+ cp1-ldo-volt = \"1.1V\";\n+ tp0145-ldo-en = \"enabled\";\n+ tp2367-ldo-en = \"disabled\";\n+ tp0145-ldo-volt = \"1.2V\";\n+ tp2367-ldo-volt = \"1.8V\";\n+ tp0145-pullup = \"2k\";\n+ tp2367-pullup = \"500R\";\n+ tp0145-io-strength = \"50Ohms\";\n+ tp2367-io-strength = \"30Ohms\";\n+ cp0-io-strength = \"20Ohms\";\n+ cp1-io-strength = \"40Ohms\";\n+\n+ target-port@0 {\n+ mode = \"i3c\";\n+ pullup = \"enabled\";\n+ always-enable;\n+ };\n+ target-port@1 {\n+ mode = \"smbus\";\n+ pullup = \"enabled\";\n+ backend@12{\n+ compatible = \"i2c-slave-mqueue\";\n+ reg = <(0x12 | I2C_OWN_SLAVE_ADDRESS)>;\n+ };\n+ };\n+ target-port@2 {\n+ mode = \"gpio\";\n+ pullup = \"disabled\";\n+ };\n+ target-port@3 {\n+ mode = \"disabled\";\n+ pullup = \"disabled\";\n+ };\n+ };\n+ };\ndiff --git a/MAINTAINERS b/MAINTAINERS\nindex 2fb1c75afd16..71ee5071ac0f 100644\n--- a/MAINTAINERS\n+++ b/MAINTAINERS\n@@ -12214,6 +12214,12 @@ S:\tSupported\n F:\tDocumentation/devicetree/bindings/i3c/renesas,i3c.yaml\n F:\tdrivers/i3c/master/renesas-i3c.c\n \n+I3C HUB DRIVER FOR REALTEK RTS490X\n+M:\tzain_zhou <zain_zhou@realsil.com.cn>\n+S:\tMaintained\n+F:\tDocumentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.yaml\n+F:\tdrivers/staging/rts490x/\n+\n I3C DRIVER FOR SYNOPSYS DESIGNWARE\n S:\tOrphan\n F:\tDocumentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml\n", "prefixes": [ "1/2" ] }