From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4A0D6C55ABF for ; Thu, 6 Aug 2026 08:46:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-ID:Date:Subject:To:From:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=8hijovbAFnss7Yyadpw60D5hqHw+OG1acDxHEX64xrU=; b=0Rzf/j95IXB/thWM/SC5ZCFET8 IfuMxhkMmVhgG2yHSLh83xGufPwZzGIL5rI2UAIIADeunDog0dPe9dtXpSuwmnhFv4sRuT29nu4OL Ol10pvm0kLl08vnooN/iYkqbib9yZZIOgEhP/Pw+rB1HeR5IHR7Jxyw4OTFHd3VpOiYKqwLrcGPY2 2/oXXmeBCA1OnhQEmjnTUeprJ8xE+DW/exW480fDYqiBNW8w5rY5araryW6K0A0xXSA1/Ri+xdsmt l5vIvyDefRUB3dN83W9HRJSh4DtcbWuvn1t447TcXfmBetjXddZGh7p8PckyltkIGHL2ms8Wny7jK wPlG5fEg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrtkW-00000005HGX-44SA; Thu, 06 Aug 2026 08:46:48 +0000 Received: from esa.microchip.iphmx.com ([68.232.153.233]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrtkT-00000005HFv-3zFH for linux-arm-kernel@lists.infradead.org; Thu, 06 Aug 2026 08:46:48 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1786006006; x=1817542006; h=from:to:subject:date:message-id:mime-version: content-transfer-encoding; bh=M7trVMqOss0CKTWdPfqLkrWNZSFKd0kI14xCgu/yMRg=; b=ZjigekFMB93vm+iEN3h7SWFGfOTRD7HABbV34gM3Ll1EQVgAYaXu6NZB UM73jjgtaPrcIBMG3py4/Q3vriswPmf6qbmgmCk5t3b3QeNmWYc4DifMY POFvbdYHzOU01pSZT6evDGSiHg9Jaxh56eIW8E592Tf63fOQIhTsJyAwy zkiRjxfsVD+3R0/ti2r5I0Px2xMBXFJzMb/W7V91T47zq3WcofI8/mJSD U9fVWR7LqFTGkg3Y9y1k2GwqnzAEr4fCi9oNrjZqIj8MnK8GPFbruJB3G e+gbYF5fzME7HgXCbiBTsgpHD3qELlEv1XYLinqGdPXkRmhmMvzYjxT8m Q==; X-CSE-ConnectionGUID: zcac2EoRQDu2ajy4au5G5A== X-CSE-MsgGUID: PztgeF3cSHqRXHJeu+TDGg== X-IronPort-AV: E=Sophos;i="6.25,208,1779174000"; d="scan'208";a="293114454" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2026 01:46:45 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.87.152) by chn-vm-ex3.mchp-main.com (10.10.87.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.2562.45; Thu, 6 Aug 2026 01:46:44 -0700 Received: from che-ll-i67070.microchip.com (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Thu, 6 Aug 2026 01:46:35 -0700 From: Varshini Rajendran To: , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v6 00/17] Add thermal management support for sama7d65 Date: Thu, 6 Aug 2026 13:10:07 +0530 Message-ID: <20260806074024.531259-1-varshini.rajendran@microchip.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260806_014646_200726_1B6C29D0 X-CRM114-Status: GOOD ( 22.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Thermal management system of sama7d65 includes: - Temperature sensor as a part of ADC channel - Temperature calibration data retrieved from the OTP memory for improved accuracy of the readings - DVFS implementation - Thermal system with DVFS as cooling cell. This patch series adds support for the following: - Tag-based packet lookup for the NVMEM OTPC driver while preserving backward compatibility with existing ID-based access - Temperature calibration layout handling in the ADC driver to support different SoC-specific calibration data formats - ADC driver adaptation for sama7d65 - DT nodes for OTP, ADC, temperature sensor, and thermal zones for sama7d65 Changes in v6: - Moved DEFINE_FREE helper outside the CONFIG_NVMEM conditional #if / #else block Link to v5: https://lore.kernel.org/lkml/20260804113338.261782-1-varshini.rajendran@microchip.com/ Changes in v5: - Placed the DEFINE_FREE helper in the header file and added it as a new commit - Added IS_ERR_OR_NULL(_T) condition to the DEFINE_FREE of nvmem_cell_put - Reorder signing tags alphabetically in Patch 1 - Kept the changes minimal by retaining ret variable - Collected the Rb tags Link to v4: https://lore.kernel.org/lkml/20260727122633.117435-1-varshini.rajendran@microchip.com/ Changes in v4: - Reworked cleanup.h usage: define and assign __free() variables at point of use after early returns, add DEFINE_FREE(nvmem_cell_put, ...) for nvmem_cell cleanup - Split patch 3/13 into two: refactoring (layout struct) and tag validation - Used struct u32_fract for p1 scaling factors - Return -ENODEV instead of -EINVAL when layout is missing - New precursor patch to remove unnecessary casts in of_device_id - Removed trailing comma from single-line initializer array - Moved emulation mode validation into a separate patch - Added FourCC validation for packet tags; invalid tags fall back to ID-only access - Mentioned FourCC in commit message and comments - Used intermediate variable for off % 4 - Rename tmp → mr_val, val→ tag - Addressed style issues: Removed comment blocks, put functions in one line - Remove blank line after compatible in regulator node - Reorder properties. Link to v3: https://lore.kernel.org/lkml/20260630093603.38663-1-varshini.rajendran@microchip.com/ Changes in v3: - Updated the commit message with reasoning for a new compatible without a fallback (sama7d65-adc) - Split patch 2/12 into two patches: a patch with cleanup.h changes only and the rework patch - Added comment explaining the TAG ACST - Fixed the holes identified in the at91_adc_platform struct by pahole tool - Dropped labels in the dt document example - Added temp variable in mchp_otpc_resolve_packet() to avoid % and / operations in the same instruction (avoiding compiler optimization) - Added the SoC details in the ADC driver Kconfig help section - Maintained reverse xmas ordering in declarations - Fixed node ordering (alphabetically) in the board dts file Link to v2: https://lore.kernel.org/lkml/20260623105944.128840-1-varshini.rajendran@microchip.com/ Changes in v2: - Preserved backward compatibility with ID-based packet lookup to avoid breaking existing users - Removed sama7g5 DTS changes (not needed with backward compatible driver - will be sent later to update to the new access method) - Preserved the packet data structure returned not to break the consumers - Reworked ADC driver to use a calibration layout structure instead of hardcoded indexes, for scalability - Fixed kernel-doc Return section - Removed stray blank line in mchp_otpc_read() - Removed unnecessary UL suffix in writel_relaxed() - Dropped unused packet types - Fixed stray spaces before exclamation marks in error messages - Added ASCII representation to TAG macro definition - Removed odd MAX enum with trailing comma and refactored - Moved DTS patches to the end of series - Used cleanup.h helpers for NVMEM data buffer handling in ADC driver - Combined multiple v1 patches into logical units - Used correct subject prefixes for dt-bindings patches - Used fixed-layout NVMEM syntax for sama7d65 DTS and binding instead of deprecated syntax - Added cpu-supply linkage for proper DVFS voltage scaling - Updated stale stride=4 comment in dt-bindings header Link to v1: https://lore.kernel.org/linux-arm-kernel/20250804100219.63325-1-varshini.rajendran@microchip.com/ Varshini Rajendran (17): dt-bindings: iio: adc: at91-sama5d2: document sama7d65 nvmem: add DEFINE_FREE for nvmem_cell_put cleanup iio: adc: at91-sama5d2_adc: use cleanup.h for NVMEM buffer iio: adc: at91-sama5d2_adc: rework temp calibration layout handling iio: adc: at91-sama5d2_adc: add condition to validate calibration data iio: adc: at91-sama5d2_adc: remove unnecessary casts in of_device_id iio: adc: at91-sama5d2_adc: adapt the driver for sama7d65 dt-bindings: nvmem: microchip,sama7g5-otpc: add sama7d65 and dt node example nvmem: microchip-otpc: nvmem: microchip-otpc: add tag-based packet lookup nvmem: microchip-otpc: nvmem: add emulation mode and OTP access validation ARM: dts: microchip: sama7d65: add cpu opps ARM: dts: microchip: sama7d65: Add ADC node ARM: dts: microchip: sama7d65_curiosity: Enable ADC, DVFS ARM: dts: microchip: sama7d65: add otpc node ARM: dts: microchip: sama7d65: add cells for temperature calibration ARM: dts: microchip: sama7d65: add temperature sensor ARM: dts: microchip: sama7d65: add thermal zones node .../bindings/iio/adc/atmel,sama5d2-adc.yaml | 1 + .../nvmem/microchip,sama7g5-otpc.yaml | 28 +++- .../dts/microchip/at91-sama7d65_curiosity.dts | 27 ++++ arch/arm/boot/dts/microchip/sama7d65.dtsi | 131 +++++++++++++++++ drivers/iio/adc/Kconfig | 2 +- drivers/iio/adc/at91-sama5d2_adc.c | 124 +++++++++++----- drivers/nvmem/microchip-otpc.c | 133 ++++++++++++++++-- .../nvmem/microchip,sama7g5-otpc.h | 4 +- include/linux/nvmem-consumer.h | 3 + 9 files changed, 403 insertions(+), 50 deletions(-) -- 2.34.1