linux-kernel - Re: [PATCH v2 00/14] Add support for TI TPS65224 PMIC

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Message-Id: <20240307094753.172319-1-bhargav.r@ltts.com>
Date: Thu,  7 Mar 2024 15:17:53 +0530
From: Bhargav Raviprakash <bhargav.r@...s.com>
To: lee@...nel.org
Cc: arnd@...db.de,
	bhargav.r@...s.com,
	broonie@...nel.org,
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Subject: Re: [PATCH v2 00/14]  Add support for TI TPS65224 PMIC

Hi,

On Thu, 29 Feb 2024 17:49:52 +0000, Lee Jones wrote:
> On Fri, 23 Feb 2024, Bhargav Raviprakash wrote:
> 
> > This series modifies the existing TPS6594 drivers to add support for the
> > TPS65224 PMIC device that is a derivative of TPS6594. TPS65224 has a
> > similar register map to TPS6594 with a few differences. SPI, I2C, ESM,
> > PFSM, Regulators and GPIO features overlap between the two devices.
> > 
> > TPS65224 is a Power Management IC (PMIC) which provides regulators and
> > other features like GPIOs, Watchdog, Error Signal Monitor (ESM) and
> > Pre-configurable Finite State Machine (PFSM). The SoC and the PMIC can
> > communicate through the I2C or SPI interfaces. The PMIC TPS65224
> > additionally has a 12-bit ADC.
> > Data Sheet for TPS65224: https://www.ti.com/product/TPS65224-Q1
> > 
> > Driver re-use is applied following the advice of the following series:
> > https://lore.kernel.org/lkml/2f467b0a-1d11-4ec7-8ca6-6c4ba66e5887@baylibre.com/
> > 
> > The features implemented in this series are:
> > - TPS65224 Register definitions
> > - Core (MFD I2C and SPI entry points)
> > - PFSM	
> > - ESM
> > - Regulators
> > - Pinctrl
> > 
> > TPS65224 Register definitions:
> > This patch adds macros for register field definitions of TPS65224
> > to the existing TPS6594 driver.  
> > 
> > Core description:
> > I2C and SPI interface protocols are implemented, with and without
> > the bit-integrity error detection feature (CRC mode).
> > 
> > PFSM description:
> > Strictly speaking, PFSM is not hardware. It is a piece of code.
> > PMIC integrates a state machine which manages operational modes.
> > Depending on the current operational mode, some voltage domains
> > remain energized while others can be off.
> > PFSM driver can be used to trigger transitions between configured
> > states.
> > 
> > ESM description:
> > This device monitors the SoC error output signal at its nERR_MCU
> > input pin. On error detection, ESM driver toggles the PMIC nRSTOUT pin
> > to reset the SoC.
> > 
> > Regulators description:
> > 4 BUCKs and 3 LDOs.
> > BUCK12 can be used in dual-phase mode.
> > 
> > Pinctrl description:
> > TPS65224 family has 6 GPIOs. Those GPIOs can also serve different
> > functions such as I2C or SPI interface or watchdog disable functions.
> > The driver provides both pinmuxing for the functions and GPIO capability.
> > 
> > This series was tested on linux-next tag: next-20240118
> > 
> > Test logs can be found here:
> > https://gist.github.com/LeonardMH/58ec135921fb1062ffd4a8b384831eb0
> > 
> > Changelog v1 -> v2:
> > - Changes to patch sign-off
> > - Commit message change in dt-bindings patch
> > - regmap config included in the of_match_table data field
> > 
> > Bhargav Raviprakash (11):
> >   mfd: tps6594: use volatile_table instead of volatile_reg
> >   mfd: tps6594: add regmap config in match data
> >   dt-bindings: mfd: ti,tps6594: Add TI TPS65224 PMIC
> >   mfd: tps6594-i2c: Add TI TPS65224 PMIC I2C
> >   mfd: tps6594-spi: Add TI TPS65224 PMIC SPI
> >   mfd: tps6594-core: Add TI TPS65224 PMIC core
> >   misc: tps6594-pfsm: Add TI TPS65224 PMIC PFSM
> >   misc: tps6594-esm: reversion check limited to TPS6594 family
> >   misc: tps6594-esm: use regmap_field
> >   misc: tps6594-esm: Add TI TPS65224 PMIC ESM
> >   arch: arm64: dts: ti: k3-am62p5-sk: Add TPS65224 PMIC support in AM62P
> >     dts
> > 
> > Nirmala Devi Mal Nadar (3):
> >   mfd: tps6594: Add register definitions for TI TPS65224 PMIC
> >   regulator: tps6594-regulator: Add TI TPS65224 PMIC regulators
> >   pinctrl: pinctrl-tps6594: Add TPS65224 PMIC pinctrl and GPIO
> > 
> >  .../devicetree/bindings/mfd/ti,tps6594.yaml   |   1 +
> >  arch/arm64/boot/dts/ti/k3-am62p5-sk.dts       |  95 +++++
> >  drivers/mfd/tps6594-core.c                    | 266 +++++++++++--
> >  drivers/mfd/tps6594-i2c.c                     |  41 +-
> >  drivers/mfd/tps6594-spi.c                     |  41 +-
> >  drivers/misc/tps6594-esm.c                    |  89 +++--
> >  drivers/misc/tps6594-pfsm.c                   |  55 ++-
> >  drivers/pinctrl/pinctrl-tps6594.c             | 287 ++++++++++++--
> >  drivers/regulator/Kconfig                     |   4 +-
> >  drivers/regulator/tps6594-regulator.c         | 244 ++++++++++--
> >  include/linux/mfd/tps6594.h                   | 369 +++++++++++++++++-
> >  11 files changed, 1325 insertions(+), 167 deletions(-)
> 
> Does this set have to be taken in wholesale?
> 
> -- 
> Lee Jones [李琼斯]

The drivers do not have to be applied in lockstep or taken in wholesale.

Regards,
Bhargav