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Wed, 18 Dec 2024 15:37:25 -0800 (PST) Received: from [127.0.1.1] ([2001:569:fcea:600:2e06:283e:5daa:4d0f]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-219dc9f6967sm802335ad.214.2024.12.18.15.37.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Dec 2024 15:37:24 -0800 (PST) From: Fabien Parent Date: Wed, 18 Dec 2024 15:36:34 -0800 Subject: [PATCH 4/9] rust: regulator: add abstraction for Regulator's modes Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241218-ncv6336-v1-4-b8d973747f7a@gmail.com> References: <20241218-ncv6336-v1-0-b8d973747f7a@gmail.com> In-Reply-To: <20241218-ncv6336-v1-0-b8d973747f7a@gmail.com> To: Rob Herring , Saravana Kannan , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Greg Kroah-Hartman , "Rafael J. Wysocki" , Wolfram Sang , Mark Brown , Liam Girdwood , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Fabien Parent Cc: devicetree@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, vinod.koul@linaro.org, Fabien Parent X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3505; i=parent.f@gmail.com; h=from:subject:message-id; bh=P1S4uQEgJR2OofcG/5ihA0BvuOtU7xhJ4vJHZDYeWxc=; b=LS0tLS1CRUdJTiBQR1AgTUVTU0FHRS0tLS0tCgpvd0o0bkFGdEFwTDlrQTBEQUFvQmlKc2d4Q kw5cktRQnl5WmlBR2RqWEtVcldDRGpYdXlsZXNoUHh5QzM5TjQyCmxyOHNjQWQyU0R3bjI1UFpP RXhkbTRrQ013UUFBUW9BSFJZaEJONk0wZElMeXpzd3JmRnNxWWliSU1RUy9heWsKQlFKblkxeWx BQW9KRUlpYklNUVMvYXlrVDk0UC8zSm55Z2Q2SU1PYmkxa25teTAvZGROWnFhOGEwb3BqZ2NweA prT3BHS2Nna0pNV1FsWGlQZlRNb3RUSWg4d0VGSDhwU01kdWUwaHVwYU82b3NkekRQRFU3U2Z4T Tlyem1PQW94CmNFTWpWVVNRT0NQWmtnRjNYSUFHaS9hOGJ0NWo2OTlpNGhtSVpDZU4xMnp3MXJG MDBNOFB2OWhvc1VnM2ljNWwKaGxDcll0cUx2cTVaYUFRd3Qvb3N2NjFwU0JoZG41djEzTEVFcUZ aY2NnekwvVHBuakQxUFpYaUJ0Z1hqYVhoUwp5SWd4cjZuK3RJN2lwSTh0RnlWS3U2Ni9SdnRDRE hvczE4cTMxNExOeTBKSDlIU2ZlemJDMVdjVGUxWFJiSk5UCkN1allrRlJzMjVRUUtZU2svQ0V2U jhFdzVmSFpzeC83TTNIeHRWV0lOUWxxUHptb3IyajdOZXRmK0lJREZOU00KdjFEb205T3BkMVNP N0NQWU45UWx2UWIrLzdaYWtCbGRWMmROQytick1mRkFUdFFTdlFuL2k2SW9FY0xucjFEYQpLTm1 KMjE1MDdOR3pockNjR253Z0FBcUVEeVNqU3JsUFJzN3F1VDEwdVh5KzdEYm9xd2xuUmhTSTBuZ3 U4SkdhClZCK1p3MHl4cVd2RWFaMmR4dmtLOTkzMWVGVUovNndyUlRodXRGT3p1dDl2bUxJOXBMR FBLdC83S2VpUEdUdzcKZjh0NU1SVUV0S2xYZ1ZCOHllRFVHUXhGbGxCNzV1cjJtY09IZ2FON1pm Yi9tOFFLWTQ0QTgveTBBR0dEMnZ6Nwp3QlA0VHdjM01Xd0MvenBmd1N2QXJYWkJlRW41UGhidGh FS0d5dnpyYlJaSHhsVEVzTTFvQTZKdEFCb3hhQjVqCkR5QmV4dU9nVUo0d2NnPT0KPU1BNmgKLS 0tLS1FTkQgUEdQIE1FU1NBR0UtLS0tLQo= X-Developer-Key: i=parent.f@gmail.com; a=openpgp; fpr=07BB034F9E8E3AF0DF4CF7607AE864A1E16FA383 From: Fabien Parent The type regulator::Mode is used by both the regulator consumer abstraction and the regulator driver abstraction. This commits adds a shared abstraction for it. Signed-off-by: Fabien Parent --- MAINTAINERS | 1 + rust/bindings/bindings_helper.h | 1 + rust/kernel/lib.rs | 2 ++ rust/kernel/regulator.rs | 42 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 46 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index acb3942eb1b66ec2bc09ac50f51c2054b7b45355..90c231f0aa7381aa8d206fb94c5d1f013dfcae41 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25159,6 +25159,7 @@ F: Documentation/power/regulator/ F: drivers/regulator/ F: include/dt-bindings/regulator/ F: include/linux/regulator/ +F: rust/kernel/regulator.rs K: regulator_get_optional VOLTAGE AND CURRENT REGULATOR IRQ HELPERS diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h index 48d2b91b34067e7e9ee9c64c2e42681e988e9aad..b18d772bc3a0e78d749cc9e5ae81a4237a57f8c5 100644 --- a/rust/bindings/bindings_helper.h +++ b/rust/bindings/bindings_helper.h @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index 456e979724d1079045cb157086ff2b2ed0fcca3b..3aa36648e9571e305a89f5d1353c0dd44e136384 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -68,6 +68,8 @@ pub mod rbtree; #[cfg(CONFIG_REGMAP)] pub mod regmap; +#[cfg(CONFIG_REGULATOR)] +pub mod regulator; pub mod revocable; pub mod security; pub mod seq_file; diff --git a/rust/kernel/regulator.rs b/rust/kernel/regulator.rs new file mode 100644 index 0000000000000000000000000000000000000000..d695ac955193efcfda62770784a92d70d606b93d --- /dev/null +++ b/rust/kernel/regulator.rs @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! SoC Regulators + +use crate::{ + bindings, + error::{code::*, Error, Result}, +}; + +/// Regulators operating modes +#[derive(Copy, Clone)] +#[repr(u32)] +pub enum Mode { + /// Invalid mode + Invalid = bindings::REGULATOR_MODE_INVALID, + /// Regulator can handle fast changes in it's load + Fast = bindings::REGULATOR_MODE_FAST, + /// Normal regulator power supply mode + Normal = bindings::REGULATOR_MODE_NORMAL, + /// Regulator runs in a more efficient mode for light loads + Idle = bindings::REGULATOR_MODE_IDLE, + /// Regulator runs in the most efficient mode for very light loads + Standby = bindings::REGULATOR_MODE_STANDBY, +} + +impl TryFrom for Mode { + type Error = Error; + + /// Convert a mode represented as an unsigned integer into its Rust enum equivalent + /// + /// If the integer does not match any of the [`Mode`], then [`EINVAL`] is returned + fn try_from(mode: core::ffi::c_uint) -> Result { + match mode { + bindings::REGULATOR_MODE_FAST => Ok(Self::Fast), + bindings::REGULATOR_MODE_NORMAL => Ok(Self::Normal), + bindings::REGULATOR_MODE_IDLE => Ok(Self::Idle), + bindings::REGULATOR_MODE_STANDBY => Ok(Self::Standby), + bindings::REGULATOR_MODE_INVALID => Ok(Self::Invalid), + _ => Err(EINVAL), + } + } +}