From: Fabien Parent <fabien.parent@xxxxxxxxxx> This commit adds support for the Onsemi NCV6336 buck down converter. Signed-off-by: Fabien Parent <fabien.parent@xxxxxxxxxx> --- drivers/regulator/Kconfig | 7 + drivers/regulator/Makefile | 1 + drivers/regulator/ncv6336_regulator.rs | 241 +++++++++++++++++++++++++++++++++ 3 files changed, 249 insertions(+) diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 39297f7d8177193e51c99bc2b360c6d9936e62fe..7254a6e1d7539b147b7ba00ebcb6fd92eb6b2616 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -952,6 +952,13 @@ config REGULATOR_MTK_DVFSRC of Mediatek. It allows for voting on regulator state between multiple users. +config REGULATOR_NCV6336 + tristate "Onsemi NCV6336 regulator driver" + depends on RUST && OF && I2C=y + select REGMAP_I2C + help + Say y here to support the Onsemi NCV6336 buck converter. + config REGULATOR_PALMAS tristate "TI Palmas PMIC Regulators" depends on MFD_PALMAS diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 3d5a803dce8a0556ba9557fa069c6e37593b3c69..0309a78b820cc85883c0c129801ab713e08e4391 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -113,6 +113,7 @@ obj-$(CONFIG_REGULATOR_MT6370) += mt6370-regulator.o obj-$(CONFIG_REGULATOR_MT6380) += mt6380-regulator.o obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o obj-$(CONFIG_REGULATOR_MTK_DVFSRC) += mtk-dvfsrc-regulator.o +obj-$(CONFIG_REGULATOR_NCV6336) += ncv6336_regulator.o obj-$(CONFIG_REGULATOR_QCOM_LABIBB) += qcom-labibb-regulator.o obj-$(CONFIG_REGULATOR_QCOM_PM8008) += qcom-pm8008-regulator.o obj-$(CONFIG_REGULATOR_QCOM_REFGEN) += qcom-refgen-regulator.o diff --git a/drivers/regulator/ncv6336_regulator.rs b/drivers/regulator/ncv6336_regulator.rs new file mode 100644 index 0000000000000000000000000000000000000000..7efd7630792b68fb353ed1b1634980def9e326a1 --- /dev/null +++ b/drivers/regulator/ncv6336_regulator.rs @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Driver for the Onsemi Buck Converter NCV6336 +//! +//! Datasheet: https://www.onsemi.com/pdf/datasheet/ncv6336bm-d.pdf + +use kernel::{ + c_str, i2c, of, + prelude::*, + regmap::{self, BitFieldReadOps, BitFieldWriteOps, RawFieldWriteOps}, + regulator::{ + driver::{Config, Desc, Device, Driver, RegmapHelpers, Status, Type}, + Mode, + }, + sync::{new_mutex, Arc, Mutex}, +}; +use register::*; + +kernel::module_i2c_driver! { + type: Ncv6336, + name: "ncv6336", + author: "Fabien Parent <fabien.parent@xxxxxxxxxx>", + license: "GPL", +} + +kernel::i2c_device_table!( + I2C_ID_TABLE, + MODULE_I2C_ID_TABLE, + <Ncv6336 as i2c::Driver>::IdInfo, + [(i2c::DeviceId::new(c_str!("ncv6336")), ()),] +); + +kernel::of_device_table!( + OF_ID_TABLE, + MODULE_OF_ID_TABLE, + <Ncv6336 as i2c::Driver>::IdInfo, + [(of::DeviceId::new(c_str!("onnn,ncv6336")), ()),] +); + +regmap::define_regmap_field_descs!(FIELD_DESCS, { + (pid, 0x3, READ, { value => raw([7:0], ro) }), + (rid, 0x4, READ, { value => raw([7:0], ro) }), + (fid, 0x5, READ, { value => raw([7:0], ro) }), + (progvsel1, 0x10, RW, { + voutvsel1 => raw([6:0], rw), + envsel1 => bit(7, rw), + }), + (progvsel0, 0x11, RW, { + voutvsel0 => raw([6:0], rw), + envsel0 => bit(7, rw), + }), + (pgood, 0x12, RW, { dischg => bit(4, rw) }), + (command, 0x14, RW, { + vselgt => bit(0, rw), + pwmvsel1 => bit(6, rw), + pwmvsel0 => bit(7, rw), + }), + (limconf, 0x16, RW, { + rearm => bit(0, rw), + rststatus => bit(1, rw), + tpwth => enum([5:4], rw, { + Temp83C = 0x0, + Temp94C = 0x1, + Temp105C = 0x2, + Temp116C = 0x3, + }), + ipeak => enum([7:6], rw, { + Peak3p5A = 0x0, + Peak4p0A = 0x1, + Peak4p5A = 0x2, + Peak5p0A = 0x3, + }), + }) +}); + +static NCV6336_DESC: Desc = Desc::new::<Ncv6336>(c_str!("ncv6336"), Type::Voltage) + .with_owner(&THIS_MODULE) + .with_of_match(c_str!("buck")) + .with_active_discharge( + pgood::addr(), + pgood::dischg::mask(), + pgood::dischg::mask(), + 0, + ) + .with_csel( + limconf::addr(), + limconf::ipeak::mask(), + &[3_500_000, 4_000_000, 4_500_000, 5_000_000], + ) + .with_enable( + progvsel0::addr(), + progvsel0::envsel0::mask(), + progvsel0::envsel0::mask(), + 0, + ) + .with_linear_mapping( + progvsel0::addr(), + progvsel0::voutvsel0::mask(), + 600_000, + 6250, + 128, + 0, + ); + +struct Ncv6336RegulatorData { + fields: regmap::Fields<{ FIELD_DESCS.len() }>, +} + +struct Ncv6336(#[expect(dead_code)] Device<<Self as Driver>::Data>); + +impl i2c::Driver for Ncv6336 { + type IdInfo = (); + + const I2C_ID_TABLE: Option<i2c::IdTable<Self::IdInfo>> = Some(&I2C_ID_TABLE); + const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_ID_TABLE); + + fn probe(client: &mut i2c::Client, _id_info: Option<&Self::IdInfo>) -> Result<Pin<KBox<Self>>> { + let config = regmap::Config::<AccessOps>::new(8, 8) + .with_max_register(0x16) + .with_cache_type(regmap::CacheType::RbTree); + let regmap = Arc::new(regmap::Regmap::init_i2c(client, &config)?, GFP_KERNEL)?; + let fields = regmap::Fields::new(®map, &FIELD_DESCS)?; + + let data = Arc::pin_init(new_mutex!(Ncv6336RegulatorData { fields }), GFP_KERNEL)?; + let config = Config::new(client.as_ref(), data.clone()).with_regmap(regmap.clone()); + let regulator = Device::register(client.as_ref(), &NCV6336_DESC, config)?; + + let drvdata = KBox::new(Self(regulator), GFP_KERNEL)?; + + Ok(drvdata.into()) + } +} + +#[vtable] +impl Driver for Ncv6336 { + type Data = Arc<Mutex<Ncv6336RegulatorData>>; + + fn list_voltage(reg: &mut Device<Self::Data>, selector: u32) -> Result<i32> { + reg.list_voltage_linear(selector) + } + + fn enable(reg: &mut Device<Self::Data>) -> Result { + reg.enable_regmap() + } + + fn disable(reg: &mut Device<Self::Data>) -> Result { + reg.disable_regmap() + } + + fn is_enabled(reg: &mut Device<Self::Data>) -> Result<bool> { + reg.is_enabled_regmap() + } + + fn set_active_discharge(reg: &mut Device<Self::Data>, enable: bool) -> Result { + reg.set_active_discharge_regmap(enable) + } + + fn set_current_limit(reg: &mut Device<Self::Data>, min_ua: i32, max_ua: i32) -> Result { + reg.set_current_limit_regmap(min_ua, max_ua) + } + + fn get_current_limit(reg: &mut Device<Self::Data>) -> Result<i32> { + reg.get_current_limit_regmap() + } + + fn set_voltage_sel(reg: &mut Device<Self::Data>, selector: u32) -> Result { + reg.set_voltage_sel_regmap(selector) + } + + fn get_voltage_sel(reg: &mut Device<Self::Data>) -> Result<i32> { + reg.get_voltage_sel_regmap() + } + + fn set_mode(reg: &mut Device<Self::Data>, mode: Mode) -> Result { + let data = reg.data(); + let fields = &mut data.lock().fields; + + match mode { + Mode::Normal => command::pwmvsel0::clear(fields), + Mode::Fast => command::pwmvsel0::set(fields), + _ => Err(ENOTSUPP), + } + } + + fn get_mode(reg: &mut Device<Self::Data>) -> Mode { + let data = reg.data(); + let fields = &mut data.lock().fields; + + match command::pwmvsel0::is_set(fields) { + Ok(true) => Mode::Fast, + Ok(false) => Mode::Normal, + Err(_) => Mode::Invalid, + } + } + + fn get_status(reg: &mut Device<Self::Data>) -> Result<Status> { + if !Self::is_enabled(reg)? { + return Ok(Status::Off); + } + + Ok(Self::get_mode(reg).into()) + } + + fn set_suspend_voltage(reg: &mut Device<Self::Data>, uv: i32) -> Result { + let data = reg.data(); + let fields = &mut data.lock().fields; + + let quot = (uv - 600000) / 6250; + let rem = (uv - 600000) % 6250; + let selector = if rem > 0 { quot + 1 } else { quot }; + + progvsel1::voutvsel1::write(fields, selector as _) + } + + fn set_suspend_enable(reg: &mut Device<Self::Data>) -> Result { + let data = reg.data(); + let fields = &mut data.lock().fields; + + progvsel1::envsel1::set(fields)?; + command::vselgt::clear(fields) + } + + fn set_suspend_disable(reg: &mut Device<Self::Data>) -> Result { + let data = reg.data(); + let fields = &mut data.lock().fields; + + progvsel1::envsel1::clear(fields)?; + command::vselgt::set(fields) + } + + fn set_suspend_mode(reg: &mut Device<Self::Data>, mode: Mode) -> Result { + let data = reg.data(); + let fields = &mut data.lock().fields; + + match mode { + Mode::Normal => command::pwmvsel1::clear(fields), + Mode::Fast => command::pwmvsel1::set(fields), + _ => Err(ENOTSUPP), + } + } +} -- 2.45.2
