As described in Documentation/firmware-guide/acpi/gpio-properties.rst a
GPIO can be referenced from ACPI ASL _DSD with the "gpios"-property of the
form:
Package () { "gpios", Package () { ref, index, pin, active_low }}
The second patch of this series adds support for specifing a PWM
reference in ASL of the form
Package () { "pwms", Package () { ref, index, pwm-period [, pwm flags]}}
The first patch of this series is necessary to resolve the "ref" in ASL
if the table has been loaded by efivar_ssdt_load() or configfs.
The third patch of this series makes leds-pwm use the ACPI-enabled
PWM framework.
Nikolaus Voss (3):
ACPI: Resolve objects on host-directed table loads
PWM framework: add support referencing PWMs from ACPI
leds-pwm.c: support ACPI via firmware-node framework
drivers/acpi/acpi_configfs.c | 6 +-
drivers/acpi/acpica/tbxfload.c | 11 ++++
drivers/leds/leds-pwm.c | 44 +++++++------
drivers/pwm/core.c | 112 +++++++++++++++++++++++++++++++++
include/linux/pwm.h | 9 +++
5 files changed, 159 insertions(+), 23 deletions(-)
--
2.17.1
