{"id":2227099,"url":"http://patchwork.ozlabs.org/api/patches/2227099/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260423085718.70762-3-akhilrajeev@nvidia.com/","project":{"id":21,"url":"http://patchwork.ozlabs.org/api/projects/21/?format=json","name":"Linux Tegra Development","link_name":"linux-tegra","list_id":"linux-tegra.vger.kernel.org","list_email":"linux-tegra@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260423085718.70762-3-akhilrajeev@nvidia.com>","list_archive_url":null,"date":"2026-04-23T08:57:01","name":"[v3,02/13] ACPICA: Read LVR from the I2C resource descriptor","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"8567ffc1a7326f7849d0748bfcb58f00328e9893","submitter":{"id":81965,"url":"http://patchwork.ozlabs.org/api/people/81965/?format=json","name":"Akhil R","email":"akhilrajeev@nvidia.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-tegra/patch/20260423085718.70762-3-akhilrajeev@nvidia.com/mbox/","series":[{"id":501164,"url":"http://patchwork.ozlabs.org/api/series/501164/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-tegra/list/?series=501164","date":"2026-04-23T08:56:59","name":"Support ACPI and SETAASA device discovery","version":3,"mbox":"http://patchwork.ozlabs.org/series/501164/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227099/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227099/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@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=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n 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sender) receiver=protection.outlook.com;\n client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C","From":"Akhil R ","To":"Alexandre Belloni , Frank Li\n\t, Rob Herring , Krzysztof Kozlowski\n\t, Conor Dooley , \"Rafael J .\n Wysocki\" , Saket Dumbre , \"Len\n Brown\" , Guenter Roeck , Philipp Zabel\n\t, Bjorn Andersson ,\n\tGeert Uytterhoeven , Dmitry Baryshkov\n\t, Arnd Bergmann , \"Eric\n Biggers\" , Wolfram Sang\n\t, Miquel Raynal\n\t, Jon Hunter , \"Thierry\n Reding\" , ,\n\t, ,\n\t, ,\n\t, ","CC":"Akhil R ","Subject":"[PATCH v3 02/13] ACPICA: Read LVR from the I2C resource descriptor","Date":"Thu, 23 Apr 2026 14:27:01 +0530","Message-ID":"<20260423085718.70762-3-akhilrajeev@nvidia.com>","X-Mailer":"git-send-email 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Apr 2026 08:58:34.9094\n (UTC)","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n f70134af-692a-4719-f879-08dea1168084","X-MS-Exchange-CrossTenant-Id":"43083d15-7273-40c1-b7db-39efd9ccc17a","X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp":"\n TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n\tCH3PEPF0000000B.namprd04.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Anonymous","X-MS-Exchange-CrossTenant-FromEntityHeader":"HybridOnPrem","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"IA0PR12MB7652"},"content":"ACPI 6.3 specifies byte 8 of I2C Serial Bus Connection descriptor to be\nused for Legacy Virtual Register (LVR) data as specified in the MIPI\nI3C Specification for an I2C device connected to an I3C Host Controller.\nLVR will be read by I3C host controller drivers and it provides details\nabout the specific speed and 50ns spike filter capabilities of I2C\ndevices.\n\nUpdate the rsconvert_info to include this field. For I2C devices on an\nI2C bus, this field is Reserved and unused.\n\nLink: https://github.com/acpica/acpica/commit/70082dc8\nLink: https://github.com/acpica/acpica/commit/b3c38dc9\nAcked-by: Rafael J. Wysocki (Intel) # ACPI\nSigned-off-by: Akhil R \n---\n drivers/acpi/acpica/rsserial.c | 6 +++++-\n include/acpi/acrestyp.h | 1 +\n 2 files changed, 6 insertions(+), 1 deletion(-)","diff":"diff --git a/drivers/acpi/acpica/rsserial.c b/drivers/acpi/acpica/rsserial.c\nindex 279bfa27da94..c06e918ab889 100644\n--- a/drivers/acpi/acpica/rsserial.c\n+++ b/drivers/acpi/acpica/rsserial.c\n@@ -315,7 +315,7 @@ struct acpi_rsconvert_info acpi_rs_convert_csi2_serial_bus[14] = {\n *\n ******************************************************************************/\n \n-struct acpi_rsconvert_info acpi_rs_convert_i2c_serial_bus[17] = {\n+struct acpi_rsconvert_info acpi_rs_convert_i2c_serial_bus[18] = {\n \t{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_SERIAL_BUS,\n \t ACPI_RS_SIZE(struct acpi_resource_i2c_serialbus),\n \t ACPI_RSC_TABLE_SIZE(acpi_rs_convert_i2c_serial_bus)},\n@@ -391,6 +391,10 @@ struct acpi_rsconvert_info acpi_rs_convert_i2c_serial_bus[17] = {\n \t AML_OFFSET(i2c_serial_bus.type_specific_flags),\n \t 0},\n \n+\t{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.i2c_serial_bus.lvr),\n+\t AML_OFFSET(i2c_serial_bus.type_specific_flags) + 1,\n+\t 1},\n+\n \t{ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.i2c_serial_bus.connection_speed),\n \t AML_OFFSET(i2c_serial_bus.connection_speed),\n \t 1},\ndiff --git a/include/acpi/acrestyp.h b/include/acpi/acrestyp.h\nindex 842f932e2c2b..38a19b1d19ac 100644\n--- a/include/acpi/acrestyp.h\n+++ b/include/acpi/acrestyp.h\n@@ -423,6 +423,7 @@ struct acpi_resource_i2c_serialbus {\n \tACPI_RESOURCE_SERIAL_COMMON u8 access_mode;\n \tu16 slave_address;\n \tu32 connection_speed;\n+\tu8 lvr;\n };\n \n /* Values for access_mode field above */\n","prefixes":["v3","02/13"]}