From patchwork Thu Feb 13 13:05:13 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 13973228 Received: from mail-wm1-f41.google.com (mail-wm1-f41.google.com [209.85.128.41]) (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 B081D23F401 for ; Thu, 13 Feb 2025 13:05:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739451919; cv=none; b=TDJwvN9AgDNGkrMpjzyFnh+8l6R1mB9SdrYa/F4WQX8w29ArZNVywfYyUaLg9fgiUNg4tG3HIjwdyJYUvxDBCVpFnniXAX0wX91KN4bL2PYm+leirCwIdgrF/UE2RDCAMrFTt5R4lEIJcTi6IBlDNOMtI9YlwH3oGhTd21X7nOc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739451919; c=relaxed/simple; bh=0xvlbveU53QfgFe308AzTrrEyAYHzEnCLInr1C5Wvwo=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=aKL9EIa7G/I994PTwQ8oEzqf1eQlVbydaGBiO28XUVXWx7S2A9BJjPgwIXraTxRFG2u8UkoQL8MXBvoTIxr7Br7nP5HPjCO7CFeTjElRYUfIjQJpPwNLq2I/sd9dnY5rkbwD0TlXX0iy0paHiDo8dWd0y32GV1SxNX2F5c7euVg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=xbtREc+t; arc=none smtp.client-ip=209.85.128.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="xbtREc+t" Received: by mail-wm1-f41.google.com with SMTP id 5b1f17b1804b1-43948021a45so8988025e9.1 for ; Thu, 13 Feb 2025 05:05:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1739451916; x=1740056716; darn=vger.kernel.org; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:from:to:cc:subject:date:message-id:reply-to; bh=yS0nd8EccXnywEAFii931dQBir56Rj9cTv3wnrjM0qE=; b=xbtREc+tgmP/6Ti8S3jJfH7TWQDl1SKdQOqMZ4bH44SQLQjmlLxOld66lNNVeY10SV MaSDoI/Bxhr4YkWsKEjO5MqSWqCT1mS0iytfYRvsNAQ5i4Y1+fXLYR0wZED2UmgVH4+s TDxPgnrzgxFgY2KDSf/h2UGfAvBfR0qX2JOKSNunvhs0Qwa70Ee+NnQbJFuq+C7e3fLS JNqhXFg2RDdRmx++3SpyxnKjsLGYusdYSsonbkHYPjUJHQbO/UsGXJlL1oDDoVJe6eB7 Vw6b8TVOK4aIWA3GnXruKJdNQAe1fEQLssIcTLFZjoCNqi8M8V8lkx3PcsP8fENOhBD7 e7bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739451916; x=1740056716; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=yS0nd8EccXnywEAFii931dQBir56Rj9cTv3wnrjM0qE=; b=hHU32BZsxo4Tz6yhhRut5ZVJIQyo3tWy/qE1u6Y4FN5sAiVr9M/G0+RaGnNtt748+q B0LZZQJoA9vc9AwmVANVOZ3o1v1H6w/kKrV+OcZBNp1vThFLfXMsajEq2lmxLoS7f1P2 2qdohodtkL8GGbISPA2S+zj0zp5AEbsTbZwzY4nZKv567CUVLa17+NBJ3/G5AEO8vmlG R5fotWoCYCaLRlMHfNPffGqptU55p/gEpGjD1SbFa8GAtQZBl+amF/HD8yQbMI0sJn66 vzLo5KBDuXnMmACX08K95cQki7dwQmVyAfqlZKV1AH3Sjzae5Ldj+fxUu/A1G6s4jKm/ uc/Q== X-Forwarded-Encrypted: i=1; AJvYcCUFg8M/Tmbpn38WTlLtfhW9lBjmIKY56jzAKH47xjNbrh/qXjf560QNoMn7X43ZIqHF7fBz6z0Mx+eVpw5nUWtwlw==@vger.kernel.org X-Gm-Message-State: AOJu0YzpbL67t7gmoDCnthBZujfdvVIl6lRPQrGqYduHlbTblElz3JSu GGZ6X8jM3qjYALwuy6t0yk7h8rnVj1v1bBMd1Eu+GxeGqNoVDrNVT8zPXjZKSVM= X-Gm-Gg: ASbGncu+JizLgnYqXsulf6ULEBjdN/LAq8wh5VOwbx5kLBzayWR41LGBh+BTMMlMxzZ hQk9ql7/Mspq2cnaKl3LkdfrfSF8JmYwhHH1JAEOSS0i6KkXzOlgWJ3G23VngLwhJkJO/J1a4mI 9RJHXCBYpAohOj0iiBaRTbmK2pjwYzECdTsi33M/JoVNJlCTAwGks7trjgVhrgr2ql6CILLmp3K /KAyhicyF9Ep3N6ViewejN6XblfXHoDLdwvT3a3aMO2f00ejIIjI0giqcYh6OarVabdzG5dR6AU BMlwKW/KtzdwB70g72CNsHCOINdyawDJ27j2lhfm867kBb2dn+46ixG/8ixP53Ixd9j3Xak= X-Google-Smtp-Source: AGHT+IGSf38YmDlCYGCcEl+oolpquFZLEVpgwlwKkPRKxqQrzPQzV6gHrX+1nVir/2rtM3YCvDv0ZQ== X-Received: by 2002:a05:600c:1e1f:b0:439:45ce:15e9 with SMTP id 5b1f17b1804b1-439581b94c4mr64442645e9.26.1739451915842; Thu, 13 Feb 2025 05:05:15 -0800 (PST) Received: from ta2.c.googlers.com (169.178.77.34.bc.googleusercontent.com. [34.77.178.169]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43961884251sm17004025e9.31.2025.02.13.05.05.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2025 05:05:15 -0800 (PST) From: Tudor Ambarus Subject: [PATCH v9 0/3] firmware: add Exynos ACPM protocol driver Date: Thu, 13 Feb 2025 13:05:13 +0000 Message-Id: <20250213-gs101-acpm-v9-0-8b0281b93c8b@linaro.org> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAAnurWcC/23MywrCMBCF4VeRrI3MTHNRV76HuEjaTA1oWxIpi vTdjYJo0eU58P13kUOKIYvt4i5SGGOOfVfGZrkQ9dF1bZCxKVsQkEIikG1GQOnq4SxB2Q2R88p oJQoYUuB4fcX2h7KPMV/6dHu1R/18/2ZGLUEqJuMt+4o1706xc6lf9akVz85o3lYDoplZU2yoH AV0FYCtf6z9WAI7s7ZY5sZ6Yo/ahR+7/rKIM7suFrABZE3UODOz0zQ9AI+C0adZAQAA To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krzysztof Kozlowski , Alim Akhtar , Jassi Brar Cc: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, andre.draszik@linaro.org, kernel-team@android.com, willmcvicker@google.com, peter.griffin@linaro.org, daniel.lezcano@linaro.org, vincent.guittot@linaro.org, ulf.hansson@linaro.org, arnd@arndb.de, Tudor Ambarus , Krzysztof Kozlowski X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1739451915; l=6508; i=tudor.ambarus@linaro.org; s=20241212; h=from:subject:message-id; bh=0xvlbveU53QfgFe308AzTrrEyAYHzEnCLInr1C5Wvwo=; b=IW7xtrZj9iPFrC7HklVBVVQYy0EwS1feN/JXtKM+sGHehyDidLtolbAhhTp0J/TRVok7Ym28c qMNAlSsaAqODCFKi+/M+FEscoexFFUlqMjMUjGEkvV8C/ScXuloCrOI X-Developer-Key: i=tudor.ambarus@linaro.org; a=ed25519; pk=uQzE0NXo3dIjeowMTOPCpIiPHEz12IA/MbyzrZVh9WI= Alive Clock and Power Manager (ACPM) Message Protocol is defined for the purpose of communication between the ACPM firmware and masters (AP, AOC, ...). ACPM firmware operates on the Active Power Management (APM) module that handles overall power activities. This protocol driver provides the interface for all the client drivers making use of the features offered by the APM. Add ACPM protocol support. Changes in v9: - use "GPL-2.0-only" thoroughly, don't mix it with "GPL-2.0": - bindings: update SPDX value to "GPL-2.0-only OR BSD-2-Clause" - exynos-acpm-protocol.h: update SPDX value to "GPL-2.0-only" - drop stray module info from exynos-acpm-pmic.c - exynos-acpm.c: explicitly include , it was implicitly included via - Link to v8: https://lore.kernel.org/r/20250211-gs101-acpm-v8-0-01d01f522da6@linaro.org Changes in v8: - replace the open-coded mutex handling with cleanup.h guard(mutex) and scoped_guard(mutex, ...). - fix kdoc warning - Link to v7: https://lore.kernel.org/r/20250207-gs101-acpm-v7-0-ffd7b2fb15ae@linaro.org Changes in v7: - drop device_node cleanup because it missed initializer and didn't make things much smaller. Call of_not_put() after we're done with the dn. - pass the property name containing the phandle as argument to acpm_get_by_phandle(). This lets consumers define their bindings later on, when introduced. - fix typo, s/acpm_dvfs_set_xfer/acpm_pmic_set_xfer. - now that the exynos mailbox driver is in v6.14-rc1, use the exynos-message format for the message passed to the mailbox controller. - Link to v6: https://lore.kernel.org/r/20250116-gs101-acpm-v6-0-e3a2e1a3007c@linaro.org Changes in v6: - Kconfig: s/depends on EXYNOS_MBOX/depends on MAILBOX, build time dependency. - exynos-acpm-pmic: constify tx buf, make acpm_chan_id unsigned int, u32 cmd[4] instead of u32 *cmd on function params. - exynos-acpm: - drop acpm_memcpy_{from,to}io32 wrappers of __io{read, write}32_copy. Right now unailgned accesses can not happen because the only protocol implemented (PMIC), uses on stack u32 buffers. - constify xfer to make it clear that the caller keeps ownership and must ensure it is valid memory through the entire xfer time. - rework acpm_get_by_phandle() and use try_module_get and device links. With the device links, when acpm is unbind, its consumers are unbind first. Thus the acpm drvdata will be destroyed after there are no consumers alive, there's no need for kref. try_module_get() is used because we'd like to be able to delete the acpm module only when there are no consumers left. - make 'struct acpm_xfer' private (move it in drivers/firmware/samsung/exynos-acpm.h). Get rid of 'struct acpm_msg' and use 'const u32 *txcmd' - bindings: add Krzysztof's R-b tag - Link to v5: https://lore.kernel.org/r/20241220-gs101-acpm-v5-0-4f26b7fb3f5f@linaro.org Changes in v5: - depends on: - Link: https://lore.kernel.org/all/20241220-acpm-v4-upstream-mbox-v6-0-a6942806e52a@linaro.org/ - it uses the newly introduced mbox_request_channel_by_args() API - dt-bindings: - drop redundant binding word from the commit subject - remove extra blank line and update example with by complying to #mbox-cells = <0>; - drop Krzysztof's R-b tag as the example was updated. - driver: - channel identifiers are discovered at runtime, use mbox_request_channel_by_args() instead of specifying them in DT. - don't call mbox_free_channel() for PTR_ERR or NULL channels. - introduce common method to init xfer - rename guard name from __EXYNOS_ACPM_MFD_H__ to __EXYNOS_ACPM_PMIC_H__ - stop exporting devm_acpm_get_by_phandle(). We'll export the symbol once a client is introduced. - rebase on top of v6.13-rc3 - Link to v4: https://lore.kernel.org/r/20241212-b4-acpm-v4-upstream-firmware-v4-0-3f18ca64f1b9@linaro.org Changes in v4: - rename bindings filename based on compatible - bindings: drop nodename - bindings: drop mboxes description - bindings: remove initdata-base prop, and define it based on compatible - bindings: move additionalProperties after the required block - bindings: drop firmware node from examples - bindings: drop unused label in examples - bindings: rename node to power-management - driver: switch 2 macros to inline functions for readability - driver: add checl to avoid shift overflow on these inline functions - driver: use ktime_to_ms(ktime_get()) to record ktime - driver: use the default non-relaxed IO accessors - driver: remove atomic handling - driver: remove stray of_match_ptr() - driver: move header in include/linux/firmware - driver: make sure to, from are 32-bit aligned and count is a 32bit quantity before calling __{ioread, write}32_copy - driver: reject IRQ channels (not supported yet_ at the top of do_xfer, instead of when waiting for response. Changes in v3: - decouple the mailbox controller driver from the ACPM protocol driver - address Krzysztof's eview comments - add ACPM PMIC protocol helpers v2: https://lore.kernel.org/linux-arm-kernel/20241017163649.3007062-1-tudor.ambarus@linaro.org/ v1: https://lore.kernel.org/linux-arm-kernel/20241004165301.1979527-1-tudor.ambarus@linaro.org/ Signed-off-by: Tudor Ambarus --- Tudor Ambarus (3): dt-bindings: firmware: add google,gs101-acpm-ipc firmware: add Exynos ACPM protocol driver MAINTAINERS: add entry for the Samsung Exynos ACPM mailbox protocol .../bindings/firmware/google,gs101-acpm-ipc.yaml | 50 ++ MAINTAINERS | 10 + drivers/firmware/Kconfig | 1 + drivers/firmware/Makefile | 1 + drivers/firmware/samsung/Kconfig | 14 + drivers/firmware/samsung/Makefile | 4 + drivers/firmware/samsung/exynos-acpm-pmic.c | 224 ++++++ drivers/firmware/samsung/exynos-acpm-pmic.h | 29 + drivers/firmware/samsung/exynos-acpm.c | 769 +++++++++++++++++++++ drivers/firmware/samsung/exynos-acpm.h | 23 + .../linux/firmware/samsung/exynos-acpm-protocol.h | 49 ++ 11 files changed, 1174 insertions(+) --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20241220-gs101-acpm-047922ab4654 Best regards,