From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3415242B75E; Thu, 14 May 2026 15:10:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778771448; cv=none; b=asyOjValKV9LWHVDCGOtKt4XjxrxPePsvR9IPV6m+BVhqFEBPWChti6zpZBypfcGNQ61PtEJwU/FXJ85oxemRwi+UfqpD/YODxejef+wrO3IFkgF4nVETbOOCPTK2iNL89jbJU0TuykQiOU+iTRNl156wEy76mJ3A0QwLGiZLzk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778771448; c=relaxed/simple; bh=vpnqcCkdkxkjCbHeMjUGkoQBZ0cBqZL5/yo/spdfsjk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MgmUCLupDenHkeHmasf7ZxYPpEv8wxhbvBqC3LH8Sf/9xh9osCiZx4j7PNUa9vHGsqh02lEmXt87Yn1ZjPu5TCxDLOsriu9nxHEr0/epKnmr98Xar+bUUA37bzEAFGodqsS8ShEpmPrt0rpt2yaubfaQT0WJKswzbKHRiCkceVU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=je8I2rY8; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="je8I2rY8" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9A24F1477; Thu, 14 May 2026 08:10:34 -0700 (PDT) Received: from e143943.arm.com (unknown [10.57.23.78]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 08B3D3F836; Thu, 14 May 2026 08:10:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778771439; bh=vpnqcCkdkxkjCbHeMjUGkoQBZ0cBqZL5/yo/spdfsjk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=je8I2rY88tHi3txa9qyczzTte3znDUsNnImNnqM3bSgg+rMmEeLus8il0/aKoZnXO wcyoCrhZOdIT88VL+sRruDZw94CPVg6c9IK7pRVYSFncLk0W24EJLa1PDfiSBgMW1m LCh6OfW5GCvHlSIkOKDRPkjOdXioKvp7bN/1J294= From: Beata Michalska To: Miguel Ojeda , Danilo Krummrich , Greg Kroah-Hartman , "Rafael J . Wysocki" Cc: Boqun Feng , Gary Guo , Bjorn Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Daniel Almeida , Boris Brezillon , rust-for-linux@vger.kernel.org, driver-core@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [RFC PATCH 2/3] rust/platform: Add support for runtime PM Date: Thu, 14 May 2026 17:09:04 +0200 Message-ID: <20260514150957.3501924-3-beata.michalska@arm.com> In-Reply-To: <20260514150957.3501924-1-beata.michalska@arm.com> References: <20260514150957.3501924-1-beata.michalska@arm.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Wire the per-driver dev_pm_ops pointer into platform_driver registration so Rust drivers can expose PM callbacks to the PM core. Also add a TryFrom implementation from Device to platform::Device so generated PM callbacks can recover a platform device from the generic device pointer received from the PM core. Signed-off-by: Beata Michalska --- rust/kernel/platform.rs | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 8917d4ee499f..d100adc2ef76 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -72,6 +72,11 @@ unsafe fn register( None => core::ptr::null(), }; + let pm_ops = match T::PM_OPS { + Some(ops) => ops, + None => core::ptr::null(), + }; + // SAFETY: It's safe to set the fields of `struct platform_driver` on initialization. unsafe { (*pdrv.get()).driver.name = name.as_char_ptr(); @@ -79,6 +84,7 @@ unsafe fn register( (*pdrv.get()).remove = Some(Self::remove_callback); (*pdrv.get()).driver.of_match_table = of_table; (*pdrv.get()).driver.acpi_match_table = acpi_table; + (*pdrv.get()).driver.pm = pm_ops; } // SAFETY: `pdrv` is guaranteed to be a valid `DriverType`. @@ -218,6 +224,9 @@ pub trait Driver: Send { /// The table of ACPI device ids supported by the driver. const ACPI_ID_TABLE: Option> = None; + /// Runtime PM callbacks + const PM_OPS: Option<&'static bindings::dev_pm_ops> = None; + /// Platform driver probe. /// /// Called when a new platform device is added or discovered. @@ -555,6 +564,15 @@ fn try_from(dev: &device::Device) -> Result { } } +impl TryFrom<&device::Device> for &Device { + type Error = kernel::error::Error; + + fn try_from(dev: &device::Device) -> Result { + let pdev_ci: &Device = TryFrom::try_from(dev)?; + Ok(pdev_ci) + } +} + // SAFETY: A `Device` is always reference-counted and can be released from any thread. unsafe impl Send for Device {} -- 2.43.0