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build: define PWM_SUPPORT arch feature flag

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As the PWM has its own sub-system in the Linux kernel,
I think it should be handled in the same way as GPIO, RTC, PCI...

This patch introduces a specific feature flag "pwm" and the
"leds-pwm" kernel module as the first customer.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: maurerr <mariusd84@gmail.com>
This commit is contained in:
Christian Lamparter 2020-08-29 23:07:28 +02:00 committed by maurerr
parent 1be8df0fa6
commit 11a10e414e
3 changed files with 20 additions and 0 deletions
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16
package/kernel/linux/modules/leds.mk
View File

@ -159,3 +159,19 @@ define KernelPackage/leds-pca963x/description
endef endef
$(eval $(call KernelPackage,leds-pca963x)) $(eval $(call KernelPackage,leds-pca963x))
define KernelPackage/leds-pwm
SUBMENU:=$(LEDS_MENU)
TITLE:=PWM driven LED Support
KCONFIG:=CONFIG_LEDS_PWM
DEPENDS:= @PWM_SUPPORT
FILES:=$(LINUX_DIR)/drivers/leds/leds-pwm.ko
AUTOLOAD:=$(call AutoLoad,60,leds-pwm,1)
endef
define KernelPackage/leds-pwm/description
This option enables support for pwm driven LEDs
endef
$(eval $(call KernelPackage,leds-pwm))

1
scripts/target-metadata.pl
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@ -20,6 +20,7 @@ sub target_config_features(@) {
/^usb$/ and $ret .= "\tselect USB_SUPPORT\n"; /^usb$/ and $ret .= "\tselect USB_SUPPORT\n";
/^usbgadget$/ and $ret .= "\tselect USB_GADGET_SUPPORT\n"; /^usbgadget$/ and $ret .= "\tselect USB_GADGET_SUPPORT\n";
/^pcmcia$/ and $ret .= "\tselect PCMCIA_SUPPORT\n"; /^pcmcia$/ and $ret .= "\tselect PCMCIA_SUPPORT\n";
/^pwm$/ and $ret .= "\select PWM_SUPPORT\n";
/^rtc$/ and $ret .= "\tselect RTC_SUPPORT\n"; /^rtc$/ and $ret .= "\tselect RTC_SUPPORT\n";
/^squashfs$/ and $ret .= "\tselect USES_SQUASHFS\n"; /^squashfs$/ and $ret .= "\tselect USES_SQUASHFS\n";
/^jffs2$/ and $ret .= "\tselect USES_JFFS2\n"; /^jffs2$/ and $ret .= "\tselect USES_JFFS2\n";

3
target/Config.in
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@ -29,6 +29,9 @@ config PCIE_SUPPORT
config PCMCIA_SUPPORT config PCMCIA_SUPPORT
bool bool
config PWM_SUPPORT
bool
config USB_SUPPORT config USB_SUPPORT
select AUDIO_SUPPORT select AUDIO_SUPPORT
bool bool