From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B3BC15ECD7 for ; Sun, 23 Nov 2025 19:10:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763925056; cv=none; b=ZvrVH11SkrzYCv3oc/lFOg3Jxl7/EUBI9ELMrDhGBaSRdVp8Cc2a0dnUO6Gc/rUTc6IcoZJuV84A5QsMhnKidAlv7tBtorkl+QkziI7Mml7jQUnU5ZdDXUci4qTl5VtAn/AmM0YsJPGwyD3cyg8hIz8v5nM67AOAvVwxahQgeIw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763925056; c=relaxed/simple; bh=5Dk3WWXMaPnrxQkhzmNwe8zAo+cjrw2rB8aZpBmxU5o=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=KMR7uDek1RuZQQYcZm7JcjYPf/NRJLYwbBps0jhOLk7g3RIDIlBaeuQQWdzMPkfcFUzt3zDOcRYD5vF247iQOQv4a/WCz7WLUanNf8TkYxY/iuGdiXMGAU+yfQ4vXXYBY3N37HT7PjXZ7vJDhpNsQvsg/eKfFm01cXz3cMXiW5Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=XsJ3wixE; arc=none smtp.client-ip=209.85.214.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XsJ3wixE" Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-297dc3e299bso35729795ad.1 for ; Sun, 23 Nov 2025 11:10:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763925053; x=1764529853; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=AIHlhcFDlCZfZMCtwENVXGOj87xc8K+w3IyybVzXSoM=; b=XsJ3wixE3nRi9sxoltkEysZkr87M3G29qCdRQCyi5wiEwhqLVd8JhnKY19xnlQV6xN 1bANAB7YCLNbqBylCjEk8b+DW0/xE8HB+t1xN/sJBRnANc6DWh0KO4QdEhh/U3T+RXPS OqN7pZ95Jjz3PjEkDxXet1Z5046yTLUylKPiJLiPFs616Mj7+Mgw604ikOlAWuW7KmP3 OO0NCaAXHsbNb6goMP3ly7uCZXLc35t3MAMxamYEN7ZTsVLawGxoLfSbqW56azhQy0Zd 9QH32RRi1ucL6aYEGTYsgjEdbfhkGVpS5DKn14ZEf4ERkjUxY3XVOKxBzDs/CdGCt2Gy eFAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763925053; x=1764529853; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=AIHlhcFDlCZfZMCtwENVXGOj87xc8K+w3IyybVzXSoM=; b=Lo4EC8RWb4WSCzImL/dPIqUgA5umWillFf5nPWCG5qfcsSbhaOIxs03TYpFQ5Wpdjk qXzmAgioh77lXQtQ8WDIKs4aMyYX2iPjVz/JJa6wMy87SSXAmLVPMKJNfwyBodZuIv5M 26EV5IxeCvqGzTPF/Bz+1R+knMV1KAD16rOocHCovkB6qv6uIkEDXKpSsrn63YODAo6p LDIu5l11vW2DyUoTxWytlWQVHzOoef5GSDLRc/ykjS55/ML+pz+Q3R0sYqBaq/F2KpiI GcxI46OlCH62wpxGC5ovo+lTpn/fAYsCp0dobM950ZoKJG0BvVv54gZBZAO88T9xCMyO YrzA== X-Forwarded-Encrypted: i=1; AJvYcCU7bW2+EJ2JiPrhk+DHSIhYh8b7TsFZJFcsiIE4N9misq/E6b69A8qb28YvfBX3M6Mk9JgjDwkphRQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxwSP0SS3OPKME50QKwOGHMKuhx2ayqTmeEvoosyW/+xIW8TmNE VtR5kvNyjq54TKkWA0cQJmAKtsDVAGzWN6TytOGX64otFEPsLnb/WNRh X-Gm-Gg: ASbGncuw7sH4azXx256jFtVaeZObMUMYxpCSxrkdmXt0M+jE65OESY0Xdve7+/F6A+Q Tce8TQwlRw5Un8iJLyICpo0ngxjIQi5Y0KHnsk8uopbPNgY8S33EjhLLqmSDN29Q4Ia8KnE/+OT HSuPNk73hJjTRvbpnnPSXbnyIhFtpDvcjfnCOYme1Hr/wsTMdU/K5XAzaaDx5SNTMB3mHqQqQMn S2NqhmUVb+bMnXH/kX9JhISI5nb6/EDBTF20dbDkaDMWVtvbuCEGPoB7aSNrcQCItlvQdhRDzIG SONWEkNYZ+040X0YEJZD5NgaLoHMrYELU9A4IJUuZsjrhjsUtfZnZv3PXmi0hqrIfzldi/eHIbH ryxbMzkG2uD5u6UA97t5PuVTlaKK940ig19HhDGxSC99MNS0TOn3rMUNZ+KRO+HuwlU2MGLoqBj tEJHtk1rFWUTb2iBT1HLdXkg== X-Google-Smtp-Source: AGHT+IFtFyoQBGCeygz7rw/XlQLfuLOGX/8UUzwFQ15n+r3y12JiFXj4EZnV2vMgsg6Ji3ClAYlb0Q== X-Received: by 2002:a17:903:4b0c:b0:297:f8d9:aad7 with SMTP id d9443c01a7336-29b6bf815fbmr100474125ad.50.1763925053254; Sun, 23 Nov 2025 11:10:53 -0800 (PST) Received: from DESKTOP-P76LG1N.lan ([42.116.199.188]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29b5b13e720sm109542655ad.42.2025.11.23.11.10.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Nov 2025 11:10:52 -0800 (PST) From: Nam Tran To: lee@kernel.org Cc: pavel@kernel.org, gregkh@linuxfoundation.org, rdunlap@infradead.org, christophe.jaillet@wanadoo.fr, krzk+dt@kernel.org, robh@kernel.org, conor+dt@kernel.org, corbet@lwn.net, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, Nam Tran Subject: [PATCH v18 0/3] leds: add new LED driver for TI LP5812 Date: Mon, 24 Nov 2025 02:10:39 +0700 Message-Id: <20251123191042.116917-1-trannamatk@gmail.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch series adds initial support for the TI LP5812, a 4x3 matrix RGB LED driver with autonomous engine control. This version provides a minimal, clean implementation focused on core functionality only. The goal is to upstream a solid foundation, with the expectation that additional features can be added incrementally in future patches. The driver integrates with the LED multicolor framework and supports a set of basic sysfs interfaces for LED control and chip management. Signed-off-by: Nam Tran --- Changes in v18: - Mark `label` as required for all LED nodes for proper sysfs naming, including single-color (led@[0-3]) and multi-color parent nodes (multi-led@[4-7]); remove previous Reviewed-by tag. - Simplified parse_drive_mode() logic: replaced nested if checks with continue to reduce indentation. - Use leds[i] instead of each in lp5812_register_leds() for clarity. - Remove wrapper function lp5812_auto_dc() - Define all magic numbers. - Handle parsing properties safely and removed unnecessary pre-initialization. - Rename lp5812_of_populate_pdata() to lp5812_of_probe(). - Save chip in i2c_set_clientdata(), not led; use leds instead of led for the array in lp5812_probe(). - Remove chip register map structure; use register addresses directly. - Minor formatting, blank line, comment clean-ups, and add email to MODULE_AUTHOR(). - Link to v17: https://lore.kernel.org/linux-leds/20251021155927.140929-1-trannamatk@gmail.com/ Changes in v17: - Dropped direct_mode from ti,scan-mode property. - Updated logic so that omitting ti,scan-mode now implies direct-drive mode by default. - Refactor lp5812_parse_led_channel() to simplify function arguments. - Mark lp5812_cfg as const since it contains only static configuration data. - Link to v16: https://lore.kernel.org/linux-leds/20251013173551.108205-1-trannamatk@gmail.com/ Changes in v16: - Renamed property 'ti,operation-mode' to 'ti,scan-mode'. - Simplified allowed values using regex pattern instead of long enum list. - Updated description accordingly and noted 'direct_mode' as default. - Updated core driver to match the binding change. - Link to v15: https://lore.kernel.org/linux-leds/20251005153337.94025-1-trannamatk@gmail.com/ Changes in v15: - Removed all custom sysfs attributes; driver now fully relies on standard LED multicolor class interfaces. - Added new device tree property `ti,operation-mode` to configure direct, TCM, and mix scan modes. - Dropped previous Reviewed-by tag from the binding patch due to property addition. - Removed ABI documentation since no new sysfs entries are created. - Updated lp5812.rst documentation accordingly. - Link to v14: https://lore.kernel.org/linux-leds/20250907160944.149104-1-trannamatk@gmail.com/ Changes in v14: - Replaced inline constants with proper macros for readability and maintainability. - Refactored lp5812_read() and lp5812_write() to simplify logic and improve clarity. - Updated lp5812_fault_clear() to use switch() instead of if/else chain. - Refactored parse_drive_mode() for cleaner logic, removed string parsing of concatenated data. - Updated activate_store() and led_current_store() to replace strsep()/kstrtoint() parsing with sscanf(). - Removed redundant comments and renamed variables for better clarity. - Link to v13: https://lore.kernel.org/lkml/20250818012654.143058-1-trannamatk@gmail.com/ Changes in v13: - Fixes build warnings reported by kernel test robot: - Inconsistent indent in lp5812_probe() - Uninitialized variable 'ret' in lp5812_multicolor_brightness() - Drop of_match_ptr() and directly assign of_match_table, as the driver is DT-only. - Link to v12: https://lore.kernel.org/lkml/20250728065814.120769-1-trannamatk@gmail.com/ Changes in v12: - Reordered helper functions above lp5812_probe() for better structure. - Clarified DT-only support by removing fallback paths and i2c_device_id table. - Directly assign platform_data to the correct pointer instead of relying on string comparisons (LP5812_SC_LED, LP5812_MC_LED) and container_of() casting. This simplifies the logic and avoids unnecessary type checks. - Removed redundant messages. - Update ABI documentation to reflect reduced feature set. - Link to v11: https://lore.kernel.org/lkml/20250714172355.84609-1-trannamatk@gmail.com/ Changes in v11: - Drop autonomous animation and other advanced features; reduce driver to core functionality only. - Simplify LED parsing to use a unified path. - Clean up and streamline code - Use alphabetically ordered includes - Remove redundant comments - Fix style issues (e.g., comment capitalization, code placement) - Update ABI documentation to reflect reduced feature set. - Link to v10: https://lore.kernel.org/lkml/20250618183205.113344-1-trannamatk@gmail.com/ Changes in v10: - Address feedback on v9 regarding missing Reviewed-by tag - Added explanation: binding structure changed significantly to integrate with the standard leds-class-multicolor.yaml schema and support multi-led@ nodes with nested led@ subnodes. This change introduced a new patternProperties hierarchy and removed the previous flat led@ layout used in the earlier versions. So the Reviewed-by tag was dropped out of caution. - Address binding document feedback - Use consistent quotes - Replace 'max-cur' with the standard 'led-max-microamp' - Remove 'led-cur' property - Fix mixed indentation - Updated core driver to align with the updated binding schema. - Address core driver feedback - Use for_each_available_child_of_node_scoped() to simplify the code - Add a return checks for lp5812_write() and lp5812_read() - Remove unneeded trailing commas - Fix unsafe usage of stack-allocated strings - Link to v9: https://lore.kernel.org/lkml/20250617154020.7785-1-trannamatk@gmail.com/ Changes in v9: - Move driver back to drivers/leds/rgb/ - Integrate with LED multicolor framework - Refactor and simplify custom sysfs handling - Extend Device Tree binding to support multi-led@ nodes using leds-class-multicolor.yaml - Update documentation to reflect the updated sysfs. - Link to v8: https://lore.kernel.org/lkml/20250427082447.138359-1-trannamatk@gmail.com/ Changes in v8: - Move driver to drivers/auxdisplay/ instead of drivers/leds/. - Rename files from leds-lp5812.c/.h to lp5812.c/.h. - Move ti,lp5812.yaml binding to auxdisplay/ directory, and update the title and $id to match new path. - No functional changes to the binding itself (keep Reviewed-by). - Update commit messages and patch titles to reflect the move. - Link to v7: https://lore.kernel.org/linux-leds/20250422190121.46839-1-trannamatk@gmail.com/ Changes in v7: - Mark `chip_leds_map` as const. - Use consistent `ret` initialization. - Simplify the function `set_mix_sel_led()`. - Refactor `dev_config_show()` and `led_auto_animation_show()` to avoid temp buffer, malloc/free. - Simplify the code and ensure consistent use of mutex lock/unlock in show/store functions. - Remove `total_leds` and `total_aeu`. - Link to v6: https://lore.kernel.org/linux-leds/20250419184333.56617-1-trannamatk@gmail.com/ Changes in v6: - Add `vcc-supply` property to describe the LP5812 power supply. - Remove `chan-name` property and entire LED subnodes, as they are not needed. - Update LP5812 LED driver node to Raspberry Pi 4 B Device Tree, based on updated binding. - Link to v5: https://lore.kernel.org/linux-leds/20250414145742.35713-1-trannamatk@gmail.com/ Changes in v5: - Rebase on v6.15-rc2 - Removed unused functions (lp5812_dump_regs, lp5812_update_bit). - Address Krzysztof's review comments - Link to v4: https://lore.kernel.org/linux-leds/20250405183246.198568-1-trannamatk@gmail.com/ --- Nam Tran (3): dt-bindings: leds: add TI/National Semiconductor LP5812 LED Driver leds: add basic support for TI/National Semiconductor LP5812 LED Driver docs: leds: Document TI LP5812 LED driver .../devicetree/bindings/leds/ti,lp5812.yaml | 251 +++++++ Documentation/leds/index.rst | 1 + Documentation/leds/leds-lp5812.rst | 50 ++ MAINTAINERS | 11 + drivers/leds/rgb/Kconfig | 13 + drivers/leds/rgb/Makefile | 1 + drivers/leds/rgb/leds-lp5812.c | 646 ++++++++++++++++++ drivers/leds/rgb/leds-lp5812.h | 172 +++++ 8 files changed, 1145 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/ti,lp5812.yaml create mode 100644 Documentation/leds/leds-lp5812.rst create mode 100644 drivers/leds/rgb/leds-lp5812.c create mode 100644 drivers/leds/rgb/leds-lp5812.h base-commit: 1af5c1d3a90246a15225fc7de0ed7e5f9b2f3f98 -- 2.25.1