zephyr: Extract charger config to its own kconfig

Make build more tractable by moving the charger configs defined in
Kconfig.battery to separate Kconfig.charger.

BRANCH=none
BUG=b:218897689
TEST=zmake testall

Signed-off-by: Aaron Massey <aaronmassey@google.com>
Change-Id: If9c817a6a201e484bc296e4b072c6dc32da202d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3453231
Reviewed-by: Yuval Peress <peress@google.com>

1 files changed, 630 insertions, 0 deletions

diff --git a/zephyr/Kconfig.charger b/zephyr/Kconfig.charger
new file mode 100644
index 0000000000..ac8dbfb191
--- /dev/null
+++ b/zephyr/Kconfig.charger
@@ -0,0 +1,630 @@
+# Copyright 2022 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+menuconfig PLATFORM_EC_CHARGER
+	bool "Charging support"
+	default y
+	select HAS_TASK_CHARGER
+	select PLATFORM_EC_EXTPOWER
+	depends on PLATFORM_EC_BATTERY
+	help
+	  Enable the EC charging task.  This enables compilation of the
+          charge_state_v2 code.
+
+if PLATFORM_EC_CHARGER
+
+choice PLATFORM_EC_CHARGER_TYPE
+	prompt "Select how many chargers are on the board"
+	default PLATFORM_EC_CHARGER_SINGLE_CHIP
+	help
+	  Select a single charger or multiple chargers.
+	  Multiple chargers imply one charger per type-C port (OCPC).
+
+config PLATFORM_EC_CHARGER_SINGLE_CHIP
+	bool "Board has a single charger"
+	help
+	  Enables a single charger for the board, which is assigned
+	  index 0.
+
+config PLATFORM_EC_OCPC
+	bool "Board has multiple chargers"
+	help
+	  Enables multiple chargers, one for each type-C port (OCPC).
+	  The assumption is that that primary charger is index 0 and is the
+	  charger IC connected to the battery FET.
+	  Additionally, `chgnum` is assumed to be the same as the
+	  charge port index.
+
+endchoice  # PLATFORM_EC_CHARGER_TYPE
+
+config PLATFORM_EC_CHARGER_RUNTIME_CONFIG
+	bool "Allow charger configuration at runtime"
+	default n
+	help
+	  When enabled, the internal array of charger chip configuration will
+	  not be made constant. This allows board code to do runtime
+	  reconfiguration, such as to configure ports that may only be present
+	  in some hardware configurations or when ports in some configurations
+	  are setup differently.
+
+config PLATFORM_EC_CHARGE_MANAGER
+	bool "Charge manager"
+	default y
+	help
+	  The EC charge manager manages charging the battery from all supported
+	  power sources.  This includes dedicated charge ports (such as a
+	  barrel jack connector), BC1.2 (Battery Charging 1.2) sources, and
+	  USB-C sources. When multiple charge sources are connected to a
+	  Chromebook simultaneously, the charge manager is responsible for
+	  picking the best source.
+
+	  Note that the charge manager assumes that at least one USB-C power
+	  source is available on the hardware, so cannot be built without
+	  PLATFORM_EC_USBC.
+
+config PLATFORM_EC_CHARGER_ISL9237
+	bool "Use the ISL9237 charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	select PLATFORM_EC_CHARGER_OTG_SUPPORTED
+	help
+	  Enables a driver for the ISL9237 VCD Battery Charger. This is a
+	  digitally-configurable, buck-boost battery charger that supporting
+	  Narrow Voltage Direct Charging (NVDC). It supports an input voltage
+	  range of 3.2-23.4V and output of 2.4-13.8V. It provides an I2C
+	  interface for configuration an provides a USB On-The-Go (OTG)
+	  function for 2- and 3-cell battery applications.
+
+config PLATFORM_EC_CHARGER_ISL9238
+	bool "Use the ISL9238 charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	select PLATFORM_EC_CHARGER_OTG_SUPPORTED
+	help
+	  Enables a driver for the ISL9238 VCD Battery Charger. This is a
+	  digitally-configurable, buck-boost battery charger that supporting
+	  Narrow Voltage Direct Charging (NVDC). It supports an input voltage
+	  range of 3.2-23.4V and output of 2.4-18.3V. It provides an I2C
+	  interface for configuration.
+
+config PLATFORM_EC_CHARGER_ISL9238C
+	bool "Use the ISL9238 Rev C charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	select PLATFORM_EC_CHARGER_OTG_SUPPORTED
+	help
+	  Enable a driver for the ISL9238 Rev C VCD Battery Charger. This
+	  is a digitally-configurable, buck-boost battery charger that
+	  supporting Narrow Voltage Direct Charging (NVDC). It supports an input
+	  voltage range of 3.2-23.4V and output of 2.4-18.3V. It provides an I2C
+	  interface for configuration.
+
+	  This option is separate from PLATFORM_EC_CHARGER_ISL9238 since there
+	  is no way in software to distinguish between rev. A/B and rev. C.
+
+config PLATFORM_EC_CHARGER_ISL9241
+	bool "Use the ISL9241 charger"
+	depends on PLATFORM_EC_I2C
+	# Hardware based charge ramp is broken in the ISL9241 (b/169350714)
+	select PLATFORM_EC_CHARGER_CHGRAMP_BROKEN
+	help
+	  Enables a driver for the ISL9241 VCD Battery Charger. This is a
+	  digitally-configurable, buck-boost battery charger that can support
+	  both Narrow Voltage Direct Charging (NVDC) and Hybrid Power Buck Boost
+	  (HPBB/Bypass) charging and switch between the modes under firmware
+	  control. It supports an input voltage range of 3.9-23.4V and output
+	  of 3.9-18.3V. It provides an I2C interface for configuration.
+
+config PLATFORM_EC_CHARGER_BQ25710
+	bool "Use the BQ25710 charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	help
+	  Enables the driver for the TI BQ25710 battery charger
+	  controller. This is a synchronous narrow voltage DC buck-boost
+	  battery charger for one to four battery cell applications. A
+	  wide range of input power sources are supported such as high
+	  voltage USB-C power delivery.
+
+config PLATFORM_EC_CHARGER_BQ25720
+	bool "Use the BQ25720 charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	help
+	  Enables the driver for the TI BQ25720 battery charger
+	  controller. This is a synchronous narrow voltage DC buck-boost
+	  battery charger for one to four battery cell applications. A
+	  wide range of input power sources are supported such as high
+	  voltage USB-C power delivery.
+
+config PLATFORM_EC_CHARGER_RAA489000
+	bool "Use the RAA489000 charger"
+	depends on PLATFORM_EC_I2C
+	depends on PLATFORM_EC_CHARGER_SENSE_RESISTOR > 0
+	depends on PLATFORM_EC_CHARGER_SENSE_RESISTOR_AC > 0
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	select PLATFORM_EC_CHARGER_TRICKLE
+	help
+	  Enables the driver for the Renesas RAA489000 battery charger
+	  with integrated USB-C TCPC.
+
+config PLATFORM_EC_CHARGER_RT9490
+	bool "Use the RT9490 charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_OTG_SUPPORTED
+	help
+	  Enables the driver for the Richtek RT9490 battery charger
+	  controller. This is a highly-integrated 5A Buck-Boost switch mode
+	  battery charge management and system power path management device for
+	  1-4 cell Li-Ion and Li-polymer battery.
+
+config PLATFORM_EC_CHARGER_SM5803
+	bool "Use the SM5803 charger"
+	depends on PLATFORM_EC_I2C
+	select PLATFORM_EC_CHARGER_NARROW_VDC
+	help
+	  Enables the driver for the SM5803.
+	  The SM5803 is the Silicon Mitus SM5803 Buck-Boost Charger.
+
+
+if PLATFORM_EC_OCPC
+
+config PLATFORM_EC_OCPC_DEF_RBATT_MOHMS
+	int "Resistance between the secondary charger IC and the battery"
+	help
+	  Boards using OCPC must define this value in order to seed the
+	  starting board battery and system resistance between the secondary
+	  charger IC and the battery.
+	  This should be at a minimum the Rds(on) resistance of the BFET plus
+	  the series sense resistor.
+
+endif  # PLATFORM_EC_OCPC
+
+config PLATFORM_EC_CHARGER_DISCHARGE_ON_AC
+	bool "Board supports discharge mode"
+	help
+	  Enable this if the board supports discharging the battery even when
+	  AC power is present. This is used for testing. The function is
+	  provided either by the charger or by custom code in the board.
+
+if PLATFORM_EC_CHARGER_DISCHARGE_ON_AC
+
+choice "Discharge control method"
+	prompt "Select the method of controlling discharge"
+	help
+	  Select which method is provided to enable and disable the discharge
+	  mode.
+
+config PLATFORM_EC_CHARGER_DISCHARGE_ON_AC_CHARGER
+	bool "Charger controls discharge mode"
+	help
+	  Enable this if the charger controls selection of discharge mode.
+	  In this case the charger must provide a function:
+
+	     int charger_discharge_on_ac(int enabled)
+
+	  It should enable this feature if enabled is true, else disable it.
+	  The function should return EC_SUCCESS
+
+config PLATFORM_EC_CHARGER_DISCHARGE_ON_AC_CUSTOM
+	bool "Custom control of discharge mode"
+	help
+	  Enable this if the discharge mode is controlled by a custom function.
+	  This function is typically provided by the board implementation:
+
+	     int board_discharge_on_ac(int enabled)
+
+	  It should enable this feature if enabled is true, else disable it.
+	  The function should return EC_SUCCESS
+
+endchoice  # "Discharge control method"
+
+endif  # PLATFORM_EC_CHARGER_DISCHARGE_ON_AC
+
+config PLATFORM_EC_CHARGER_BQ25710_PSYS_SENSING
+	bool "Charger monitors PSYS"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  This enables the PSYS sensing circuit on the BQ25710 and
+	  BQ25720 chargers. This is used for system power monitoring on
+	  board designs that support this capability. This circuit is
+	  disabled by default (reset) and needs to be explicitly enabled
+	  for meaningful results.
+
+config PLATFORM_EC_CHARGER_BQ25710_CMP_REF_1P2
+	bool "Use 1.2 V for internal comparator reference voltage"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  This changes the charger's internal comparator reference
+	  voltage to 1.2 V. The power-on default is 2.3 V. This must be
+	  enabled if the board was designed for 1.2 V instead of 2.3 V.
+
+config PLATFORM_EC_CHARGER_BQ25710_PKPWR_TOVLD_DEG_CUSTOM
+	bool "PKPWR_TOVLD_DEG override"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charger's PKPWR_TOVLD_DEG period.
+
+config PLATFORM_EC_CHARGER_BQ25710_PKPWR_TOVLD_DEG
+	int "PKPWR_TOVLD_DEG period"
+	range 0 3
+	default 0
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Sets the input overload time when in peak power mode
+	  (PKPWR_TOVLD_DEG). This limits how long the charger can draw
+	  ILIM2 from the adapter. This is a 2 bit field. On the bq25710
+	  1 ms to 20 ms can be encoded. On the bq25720 1 ms to 10 ms can
+	  be encoded.
+
+config PLATFORM_EC_CHARGER_BQ25710_EN_ACOC
+	bool "Enable AC over-current protection"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  This enables the charger's AC over-current protection. The
+	  converter turns off when the OC threshold is reached. The
+	  threshold is selected using the ACOC_VTH bit.
+
+config PLATFORM_EC_CHARGER_BQ25710_ACOC_VTH_1P33
+	bool "Set ACOC threshold to 133% of ILIM2"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+          This selects which ACOC protection threshold is used with
+	  EN_ACOC. Enabling this option selects 133% of
+	  ILIM2. Otherwise, the default is 200% of ILIM2.
+
+config PLATFORM_EC_CHARGER_BQ25710_BATOC_VTH_MINIMUM
+	bool "Select the minimum BATOC threshold"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+          This selects the minimum BATOC protection threshold to be used
+          with EN_BATOC. The minimum threshold is 150% of PROCHOT IDCHG
+          on the bq25710 and 133% of PROCHOT IDCHG_TH2 on the
+          bq25720. The default threshold is 200% on both chips.
+
+config PLATFORM_EC_CHARGER_BQ25710_PP_INOM
+	bool "Enable PROCHOT on adapter current exceeding INOM"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Sets the PP_INOM bit in Prochot Option 1 register. This causes
+	  PROCHOT to be pulsed when the nominal adapter current
+	  threshold is reached. INOM is 110% of IDPM/IIN_DPM (input
+	  current setting).
+
+config PLATFORM_EC_CHARGER_BQ25710_PP_BATPRES
+	bool "Enable PROCHOT on battery removal"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Sets the PP_BATPRES bit in Prochot Option 1 register. This
+	  causes PROCHOT to be pulsed when the battery is removed.
+
+config PLATFORM_EC_CHARGER_BQ25710_PP_ACOK
+	bool "Enable PROCHOT on AC removal"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Sets the PP_ACOK in Prochot Option 1 register. This causes
+	  PROCHOT to be pulsed when the AC adapter is removed.
+
+config PLATFORM_EC_CHARGER_BQ25720_PP_IDCHG2
+	bool "Enable PROCHOT on battery current exceeding IDCHG_TH2"
+	default n
+	depends on PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Sets the PP_IDCHG2 bit in Charge Option 4 register. This
+	  causes PROCHOT to be pulsed when the battery discharge current
+	  exceeds IDCHG_TH2.
+
+config PLATFORM_EC_CHARGER_BQ25710_SENSE_RESISTOR
+	int "Value of the charge sense-resistor, in mOhms"
+	default 10
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  The charge sense-resistor is used to detect the charge current to the
+	  battery. Its value must be known for the calculation to be correct.
+	  The value is typically around 10 mOhms.
+
+config PLATFORM_EC_CHARGER_BQ25710_SENSE_RESISTOR_AC
+	int "Value of the input sense-resistor, in mOhms"
+	default 10
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  The input sense-resistor is used to detect the input current from the
+	  external AC power supply. Its value must be known for the calculation
+	  to be correct. The value is typically around 10 mOhms.
+
+config PLATFORM_EC_CHARGER_BQ257X0_ILIM2_VTH_CUSTOM
+	bool "ILIM2_VTH override"
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charhger's ILIM2_VTH threshold
+
+config PLATFORM_EC_CHARGER_BQ257X0_ILIM2_VTH
+	int "ILIM2 threshold"
+	range 1 30
+	default 9
+	depends on PLATFORM_EC_CHARGER_BQ257X0_ILIM2_VTH_CUSTOM
+	help
+	  Set percentage of IDPM as threshold. ICRIT threshold is set to be 110%
+	  of ILIM2. Input overcurrent protection (ACOC) threshold is also 1.33x
+	  or 2x of ILIM2 (1.33x or 2x based on ACOC limit field).
+	  1  - 25: 110% - 230%, step is 5%.
+	  26 - 30: 250% - 450%, step is 50%.
+	  31: Out of range (ignored).
+
+config PLATFORM_EC_CHARGER_BQ25720_VSYS_TH2_CUSTOM
+	bool "VSYS_TH2 override"
+	depends on PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charger's VSYS_TH2 threshold.
+
+config PLATFORM_EC_CHARGER_BQ25720_VSYS_TH2_DV
+	int "VSYS threshold 2 in deci-volts"
+	range 32 95
+	default 32
+	depends on PLATFORM_EC_CHARGER_BQ25720_VSYS_TH2_CUSTOM
+	help
+	  Sets the VSYS threshold 2 in deci volts. This is the first
+	  threshold that will be encountered when VSYS droops, typically
+	  due to high power demand from the main processor. The charger
+	  chip reacts by asserting PROCHOT which the main processor uses
+	  as an indication to throttle back and reduce power demand. The
+	  charger chip uses default thresholds which may be low enough
+	  to cause system instability. The default for 1S batteries is
+	  3.2v and 5.9v for 2S or higher batteries.  The valid range is
+	  3.2v - 3.9v for 1S and 3.2 - 9.5v for 2S or higher batteries.
+
+config PLATFORM_EC_CHARGER_BQ25720_VSYS_UVP_CUSTOM
+       	bool "VSYS_UVP override"
+	depends on PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charger's VSYS_UVP threshold.
+
+config PLATFORM_EC_CHARGER_BQ25720_VSYS_UVP
+       	int "VSYS_UVP threshold"
+	range 0 7
+	default 0
+	depends on PLATFORM_EC_CHARGER_BQ25720_VSYS_UVP_CUSTOM
+	help
+	  Sets the VSYS under voltage (VSYS_UVP) lockout threshold. This
+	  is a 3 bit field with default value 0. The actual voltage
+	  encoded is (0.8 * <value> + 2.4), allowing a threshold in the
+	  range of 2.4 V to 8.0 V to be specified.
+
+config PLATFORM_EC_CHARGER_BQ25720_IDCHG_DEG2_CUSTOM
+	bool "IDCHG_TH2 deglitch time override"
+	depends on PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charger's 2nd battery discharge current
+	  limit (IDCHG_TH2) deglitch time (IDCHG_DEG2).
+
+config PLATFORM_EC_CHARGER_BQ25720_IDCHG_DEG2
+	int "IDCHG_TH2 deglitch time"
+	range 0 3
+	default 1
+	depends on PLATFORM_EC_CHARGER_BQ25720_IDCHG_DEG2_CUSTOM
+	help
+	  Sets the 2nd battery discharge current limit (IDCHG_TH2)
+	  deglitch time (IDCHG_DEG2). This is a 2 bit field with default
+	  value 1 (1.6 ms). The encoded value ranges from 100 us to 12
+	  ms.
+
+config PLATFORM_EC_CHARGER_BQ25720_IDCHG_TH2_CUSTOM
+	bool "IDCHG_TH2 override"
+	depends on PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charger's 2nd battery discharge current
+	  limit (IDCHG_TH2).
+
+config PLATFORM_EC_CHARGER_BQ25720_IDCHG_TH2
+	int "IDCHG threshold 2"
+	range 0 7
+	default 1
+	depends on PLATFORM_EC_CHARGER_BQ25720_IDCHG_TH2_CUSTOM
+	help
+	  Sets the charger's 2nd battery discharge current limit
+	  (IDCHG_TH2) as a percentage of IDCHG_TH1. This is a 3 bit
+	  field with default value 1 (150%). The encoded value ranges
+	  from 125% to 400%.
+
+config PLATFORM_EC_CHARGER_BQ25710_VSYS_MIN_VOLTAGE_CUSTOM
+	bool "Enable minimum system voltage override"
+	depends on PLATFORM_EC_CHARGER_BQ25710 || PLATFORM_EC_CHARGER_BQ25720
+	help
+	  Enable customizing the charger's 2nd battery discharge current
+	  limit (IDCHG_TH2).
+
+config PLATFORM_EC_CHARGER_BQ25710_VSYS_MIN_VOLTAGE_MV
+	int "Minimum system voltage in milli-volts"
+	default 0
+	depends on PLATFORM_EC_CHARGER_BQ25710_VSYS_MIN_VOLTAGE_CUSTOM
+	help
+	  Sets the minimum system voltage in milli-volts. The bq25710
+	  uses 6 bits of resolution and can be configured from 1.024 V
+	  to 16.128 V in 256 mV increments. The bq25720 uses 8 bits of
+	  resolution and can be set from 1.0 V to 19.2 V in 100 mV
+	  increments. The default value depends on configured number of
+	  battery cells connected in series using the CELL_BATPRESZ
+	  strap.
+
+config PLATFORM_EC_CHARGER_MAINTAIN_VBAT
+	bool "Maintain VBAT voltage regardless of AC state"
+	help
+	  Leave the charger VBAT configured to battery-requested voltage under
+	  all conditions, even when AC is not present. This may be necessary to
+	  work around quirks of certain charger chips, such as the BD9995X.
+
+config PLATFORM_EC_CHARGER_NARROW_VDC
+	bool
+	help
+	  Select this if the charger uses a Narrow Voltage Direct Charging.
+	  Narrow VDC (NVDC) reduces power loss by reducing the voltage range of
+	  the VDC node. This reduction is accomplished by replacing the
+	  battery-charger circuit with a system-charger voltage regulator, thus
+	  narrowing the VDC range. This in turn enables DC/DC converter
+	  optimisations in the system and allows the removal of the power-path
+	  switch, saving additional power, board area, and cost.
+
+	  This should be enabled by charger drivers which need it. It cannot
+	  be set otherwise, even in prj.conf
+
+config PLATFORM_EC_CHARGER_TRICKLE
+	bool
+	help
+	  Select this if the charger allows trickle charging, which allows
+	  the battery to charge with a minimum voltage.
+
+	  This should be enabled by charger drivers which need it.
+
+config PLATFORM_EC_CHARGER_OTG_SUPPORTED
+	bool
+	help
+	  Indicates that the charger supports an OTG (On-The-Go) function,
+	  which allows supplying output power from the battery to a connected
+	  device.
+
+	  This should be enabled by charger drivers which support it. It cannot
+	  be set otherwise, even in prj.conf
+
+config PLATFORM_EC_CHARGER_OTG
+	bool "Allow supplying output power from the battery"
+	depends on PLATFORM_EC_CHARGER_OTG_SUPPORTED
+	help
+	  Enable charger's OTG functions, i.e. make it possible to supply
+	  output power from the battery. This option is available if the
+	  selected charger supports it.
+
+config PLATFORM_EC_CHARGER_PROFILE_OVERRIDE
+	bool "Override the charger profile"
+	help
+	  Select this if the charger should call battery_override_params() to
+	  limit/correct the voltage and current requested by the battery pack
+	  before acting on the request.
+
+	  The board must provide this function:
+
+	    void battery_override_params(struct batt_params *batt);
+
+	  It may modify the parameters as needed.
+
+config PLATFORM_EC_CHARGER_PSYS
+	bool "Support system power-monitor (PSYS) function"
+	help
+	  Enable this to support monitoring of system power using the charger's
+	  PSYS function. The charger provides an output which can be read
+	  using an ADC channel on the EC.
+
+config PLATFORM_EC_CHARGER_PSYS_READ
+	bool "Allow reading PSYS (system power) value"
+	depends on PLATFORM_EC_CHARGER_PSYS
+	help
+	  Enable support for reading the system-power value (PSYS). This
+	  calls the function charger_get_system_power() which is provided
+	  by the charger.
+
+	  It also enables the "psys" console command.
+
+	  Sample output:
+
+	    PSYS from chg_adc: 456 mW
+
+config PLATFORM_EC_CHARGER_SENSE_RESISTOR
+	int "Value of the charge sense-resistor, in mOhms"
+	help
+	  The charge sense-resistor is used to detect the charge current to the
+	  battery. Its value must be known for the calculation to be correct.
+	  The value is typically around 10 mOhms.
+
+config PLATFORM_EC_CHARGER_SENSE_RESISTOR_AC
+	int "Value of the input sense-resistor, in mOhms"
+	help
+	  The input sense-resistor is used to detect the input current from the
+	  external AC power supply. Its value must be known for the calculation
+	  to be correct. The value is typically around 10 mOhms.
+
+config PLATFORM_EC_CHARGER_CHGRAMP_BROKEN
+	bool
+	help
+	  This is selected if the charger's support for hardware-controlled
+	  charge ramping is broken. In some cases the charger has problems
+	  which make it unusable and we must fall back to software-controlled
+	  charge ramping.
+
+	  This should be enabled by charger drivers which need it. It cannot
+	  be set otherwise, even in prj.conf
+
+choice "Charge-ramp method"
+	prompt "Select the charge-ramp method"
+	help
+	  Select the method used for ramping up charging of a battery. It is
+	  preferred to use the hardware method if the charger chip can support
+	  it. If not, software-controlled charging can be used, with a slight
+	  increase in code size.
+
+config PLATFORM_EC_CHARGE_RAMP_HW
+	bool "Hardware-controlled charging"
+	depends on !PLATFORM_EC_CHARGER_CHGRAMP_BROKEN
+	help
+	   Disables software control of ramping up charging. This is used when
+	   the hardware has a mechanism for ramping input current and
+	   backing-off as needed.
+
+config PLATFORM_EC_CHARGE_RAMP_SW
+	bool "Software-controlled charging"
+	select HAS_TASK_CHG_RAMP
+	help
+	  Enables ramping up charging from an external source to the maximum
+	  available within the source's limits and taking into account the
+	  current needs of the device. It handles the user plugging chargers in
+	  and removing them.
+
+endchoice  # "Charge-ramp method"
+
+config PLATFORM_EC_CONSOLE_CMD_CHARGER_ADC_AMON_BMON
+	bool "Console command: amonbmon"
+	help
+	  Enable the 'amonbmon' command. This shows the charger adapter-current
+	  monitor (AMON) and battery-charging current monitor (BMON).
+
+	     amonbmon a | b
+
+config PLATFORM_EC_CONSOLE_CMD_CHGRAMP
+	bool "Console command: chgramp"
+	depends on PLATFORM_EC_CHARGE_RAMP_SW
+	default y
+	help
+	  Enable the "chgramp" command. This shows the current state of the
+	  chg_ramp task. It shows the state of each port and the current limit
+	  for each port. The 'State' shown is from enum chg_ramp_state.
+
+	  Chg Ramp:
+	    State: 5
+	    Min ICL: 2000
+	    Active ICL: 2000
+	    Port 0:
+	      OC idx:0
+	      OC 0: s-1 oc_det0 icl0
+	      OC 1: s0 oc_det0 icl0
+	      OC 2: s0 oc_det0 icl0
+	    Port 1:
+	      OC idx:0
+	      OC 0: s-1 oc_det0 icl0
+	      OC 1: s0 oc_det0 icl0
+	      OC 2: s0 oc_det0 icl0
+
+config PLATFORM_EC_CONSOLE_CMD_CHARGER_DUMP
+	bool "Console command: charger dump"
+	help
+	  Enable the "charger dump" subcommand. If the charger driver provides
+	  a dump_registers() function, this command shows its register dump.
+
+endif # PLATFORM_EC_CHARGER