ec/google/chromeec: Add Kconfig to enable battery full workaround

Commit 55a972236e ("chromeec: Disable battery remaining capacity
workaround") disabled the workaround for all ChromeEC devices, since
newer EC firmware applies compensation via battery_compensate_params.
Older boards use EC branches that lack this logic; without it, users can
see 93–100% charge–discharge cycling and stale full-capacity reporting.

Add a Kconfig to configure the workaround, and select it for older
boards whose EC firmware lacks battery_compensate_params logic.
EC firmware branches were inspected to determine which ones lack this
logic.


TEST=build/boot google/lulu, verify battery full indication works
     correctly with the Kconfig selected.

Change-Id: I096e0cf402e07f846b961319e01fb8f2c2dde7fc
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90960
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/ec/google/chromeec/Kconfig

@@ -220,6 +220,17 @@ config EC_GOOGLE_CHROMEEC_READ_BATTERY_LONG_STRING
 
 	  If unsure, say N.
 
+config EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
+	bool
+	help
+	  Enable the ACPI "full battery" workaround (BFWK) for remaining capacity.
+	  When enabled, remaining charge near full is reported as full capacity to
+	  hide 93-100% charge-discharge cycles and to handle batteries that don't report
+	  full capacity timely.
+	  Select this for older boards whose EC firmware lacks battery_compensate_params
+	  logic.
+	  If unsure, say N.
+
 config EC_GOOGLE_CHROMEEC_LPC_GENERIC_MEMORY_RANGE
 	def_bool n
 	help

src/ec/google/chromeec/acpi/battery.asl

@@ -414,8 +414,9 @@ Device (BAT0)
 	})
 	Name (BSTP, 0)
 
-	// Workaround for full battery status, disabled by default
-	Name (BFWK, 0)
+	// Workaround for full battery status, disabled by default,
+	// enabled via Kconfig for older boards lacking EC compensation.
+	Name (BFWK, CONFIG(EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND))
 
 	// Method to enable full battery workaround
 	Method (BFWE)
@@ -504,8 +505,9 @@ Device (BAT1)
 	})
 	Name (BSTP, 0)
 
-	// Workaround for full battery status, disabled by default
-	Name (BFWK, 0)
+	// Workaround for full battery status, disabled by default,
+	// enabled via Kconfig for older boards lacking EC compensation.
+	Name (BFWK, CONFIG(EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND))
 
 	// Method to enable full battery workaround
 	Method (BFWE)

src/mainboard/google/auron/Kconfig

@@ -9,6 +9,7 @@ config BOARD_GOOGLE_BASEBOARD_AURON
 	select DRIVERS_OPTION_CFR_ENABLED if PAYLOAD_EDK2 && SMMSTORE
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_LPC
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE

src/mainboard/google/cyan/Kconfig

@@ -8,6 +8,7 @@ config BOARD_GOOGLE_BASEBOARD_CYAN
 	select EC_GOOGLE_CHROMEEC_BOARDID
 	select EC_GOOGLE_CHROMEEC_LPC
 	select EC_GOOGLE_CHROMEEC_MEC
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE

src/mainboard/google/eve/Kconfig

@@ -15,6 +15,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_BOARDID
 	select EC_GOOGLE_CHROMEEC_ESPI
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select I2C_TPM

src/mainboard/google/glados/Kconfig

@@ -10,6 +10,7 @@ config BOARD_GOOGLE_BASEBOARD_GLADOS
 	select EC_GOOGLE_CHROMEEC_BOARDID
 	select EC_GOOGLE_CHROMEEC_LPC
 	select EC_GOOGLE_CHROMEEC_MEC
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select EC_GOOGLE_CHROMEEC_PD
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES

src/mainboard/google/link/Kconfig

@@ -10,6 +10,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select DRIVERS_OPTION_CFR_ENABLED if PAYLOAD_EDK2 && SMMSTORE
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_AUTO_FAN_CTRL
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select EC_GOOGLE_CHROMEEC_LPC
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES

src/mainboard/google/poppy/Kconfig

@@ -73,6 +73,7 @@ config BOARD_GOOGLE_NOCTURNE
 	select DRIVERS_I2C_SX9310
 	select DRIVERS_SPI_ACPI
 	select DRIVERS_USB_ACPI
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select EXCLUDE_NATIVE_SD_INTERFACE
 	select GEO_SAR_ENABLE if CHROMEOS_WIFI_SAR
 	select INTEL_GMA_HAVE_VBT

src/mainboard/google/rambi/Kconfig

@@ -6,6 +6,7 @@ config BOARD_GOOGLE_BASEBOARD_RAMBI
 	select BOARD_ROMSIZE_KB_8192
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_LPC
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select ENABLE_BUILTIN_COM1 if CONSOLE_SERIAL
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES

src/mainboard/google/reef/Kconfig

@@ -10,6 +10,7 @@ config BOARD_GOOGLE_BASEBOARD_REEF
 	select DRIVERS_OPTION_CFR_ENABLED if PAYLOAD_EDK2 && SMMSTORE
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_BOARDID
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select EC_GOOGLE_CHROMEEC_LPC
 	select GOOGLE_SMBIOS_MAINBOARD_VERSION
 	select HAVE_ACPI_RESUME

src/mainboard/google/slippy/Kconfig

@@ -8,6 +8,7 @@ config BOARD_GOOGLE_BASEBOARD_SLIPPY
 	select DRIVERS_OPTION_CFR_ENABLED if PAYLOAD_EDK2 && SMMSTORE
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_LPC
+	select EC_GOOGLE_CHROMEEC_NEEDS_BATTERY_WORKAROUND
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE