diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2023-03-04 01:19:28 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2023-03-16 16:42:30 +0300 |
| commit | 94227b9c88f3df8ac3025611719cebd125b5981a (patch) | |
| tree | 360d67c0b08928b290badf25cb12a03273dd5cac /drivers/platform/x86/intel/Makefile | |
| parent | de4fb5f5165582caf21b9074b918acccf99582a1 (diff) | |
| download | linux-94227b9c88f3df8ac3025611719cebd125b5981a.tar.xz | |
platform/x86: Add intel_bytcrc_pwrsrc driver
Add a new driver for the power-, wake- and reset-source functionality
of the Bay Trail (BYT) version of the Crystal Cove PMIC.
The main functionality here is detecting which power-sources (USB /
DC in / battery) are active. This is normally exposed to userspace as
a power_supply class charger device with an online sysfs attribute.
But if a charger is online or not is already exposed on BYT-CRC devices
through either an ACPI AC power_supply device, or through a native driver
for the battery charger chip (e.g. a BQ24292i).
So instead of adding duplicate info under the power_supply class this
driver exports the info through debugfs and likewise adds debugfs files
for the reset- and wake-source info / registers.
Despite this driver only exporting debugfs bits it is still useful to
have this driver because it clears the wake- and reset-source registers
after reading them. Not clearing these can have undesirable side-effects.
Specifically if the WAKESRC register contains 0x01 (wake by powerbutton)
on reboot then the firmware on some tablets turns the reboot into
a poweroff. I guess this may be necessary to make long power-presses turn
into a poweroff somehow?
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230303221928.285477-1-hdegoede@redhat.com
Diffstat (limited to 'drivers/platform/x86/intel/Makefile')
| -rw-r--r-- | drivers/platform/x86/intel/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel/Makefile b/drivers/platform/x86/intel/Makefile index 411df4040427..c1d5fe05e3f3 100644 --- a/drivers/platform/x86/intel/Makefile +++ b/drivers/platform/x86/intel/Makefile @@ -38,6 +38,8 @@ intel_bxtwc_tmu-y := bxtwc_tmu.o obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU) += intel_bxtwc_tmu.o intel_crystal_cove_charger-y := crystal_cove_charger.o obj-$(CONFIG_X86_ANDROID_TABLETS) += intel_crystal_cove_charger.o +intel_bytcrc_pwrsrc-y := bytcrc_pwrsrc.o +obj-$(CONFIG_INTEL_BYTCRC_PWRSRC) += intel_bytcrc_pwrsrc.o intel_chtdc_ti_pwrbtn-y := chtdc_ti_pwrbtn.o obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN) += intel_chtdc_ti_pwrbtn.o intel_chtwc_int33fe-y := chtwc_int33fe.o |