Re: [PATCH] led: led_pwm: Add a driver for LEDs connected to PWM
On Sat, Mar 12, 2022 at 01:03:14PM +0300, Ivan Vozvakhov wrote: > Add a driver which allows to use of LEDs connected > to PWM (Linux compatible). > MAINTAINERS: add i.vozvakhov as a maintainer of leds-pwm > C(required during new functionality adding). > > Signed-off-by: Ivan Vozvakhov Applied to u-boot/master, thanks! -- Tom signature.asc Description: PGP signature
[PATCH] led: led_pwm: Add a driver for LEDs connected to PWM
Add a driver which allows to use of LEDs connected to PWM (Linux compatible). MAINTAINERS: add i.vozvakhov as a maintainer of leds-pwm C(required during new functionality adding). Signed-off-by: Ivan Vozvakhov --- MAINTAINERS| 6 + doc/device-tree-bindings/leds/leds-pwm.txt | 47 + drivers/led/Kconfig| 6 + drivers/led/Makefile | 1 + drivers/led/led_pwm.c | 192 + 5 files changed, 252 insertions(+) create mode 100644 doc/device-tree-bindings/leds/leds-pwm.txt create mode 100644 drivers/led/led_pwm.c diff --git a/MAINTAINERS b/MAINTAINERS index fb171e0c68..2e8f8cdada 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -869,6 +869,12 @@ F: doc/README.kwbimage F: doc/kwboot.1 F: tools/kwb* +LED +M: Ivan Vozvakhov +S: Supported +F: doc/device-tree-bindings/leds/leds-pwm.txt +F: drivers/led/led_pwm.c + LOGGING M: Simon Glass S: Maintained diff --git a/doc/device-tree-bindings/leds/leds-pwm.txt b/doc/device-tree-bindings/leds/leds-pwm.txt new file mode 100644 index 00..186e8a848f --- /dev/null +++ b/doc/device-tree-bindings/leds/leds-pwm.txt @@ -0,0 +1,47 @@ +LEDs connected to PWM (Linux compatible) + +Required properties: +- compatible : should be "pwm-leds". + +Each LED is represented as a sub-node of the pwm-leds device. Each +node's name represents the name of the corresponding LED. + +LED sub-node properties: +- pwms : (required) LED pwm channel, see "pwms property" in + doc/device-tree-bindings/pwm/pwm.txt +- label : (optional) LED label, see "label property" in + doc/device-tree-bindings/led/common.txt +- max-brightness : (optional, unsigned, default 255) Maximum brightness possible + for the LED +- active-low : (optional, boolean, default false) For PWMs where the LED is + wired to supply rather than ground +- u-boot,default-brightness : (optional, unsigned, default 0) Initial state + of pwm-leds + +Example: + +leds { +compatible = "pwm-leds"; +status = "okay"; + +blue { +label = "led-blue"; +pwms = < 0 10 0>; +max-brightness = <255>; +u-boot,default-brightness = <127>; +}; + +green { +label = "led-green"; +pwms = < 0 10 0>; +max-brightness = <255>; +u-boot,default-brightness = <127>; +}; + +red { +label = "led-red"; +pwms = < 0 10 0>; +max-brightness = <255>; +u-boot,default-brightness = <127>; +}; +} diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index cc87fbf395..48616e2f55 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -42,6 +42,12 @@ config LED_CORTINA This option enables support for LEDs connected to the Cortina Access CA SOCs. +config LED_PWM + bool "LED PWM" + depends on LED && DM_PWM + help + Enable support for LEDs connected to PWM. + Linux compatible ofdata. config LED_BLINK bool "Support LED blinking" diff --git a/drivers/led/Makefile b/drivers/led/Makefile index 8e3ae7f146..c31a59e1aa 100644 --- a/drivers/led/Makefile +++ b/drivers/led/Makefile @@ -7,5 +7,6 @@ obj-y += led-uclass.o obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o +obj-$(CONFIG_LED_PWM) += led_pwm.o obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o obj-$(CONFIG_LED_CORTINA) += led_cortina.o diff --git a/drivers/led/led_pwm.c b/drivers/led/led_pwm.c new file mode 100644 index 00..4e50272258 --- /dev/null +++ b/drivers/led/led_pwm.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2022 VK + * Author: Ivan Vozvakhov + */ + +#include +#include +#include +#include +#include +#include +#include + +#define LEDS_PWM_DRIVER_NAME "led_pwm" + +struct led_pwm_priv { + struct udevice *pwm; + uint period;/* period in ns */ + uint duty; /* duty cycle in ns */ + uint channel; /* pwm channel number */ + bool active_low;/* pwm polarity */ + bool enabled; +}; + +static int led_pwm_enable(struct udevice *dev) +{ + struct led_pwm_priv *priv = dev_get_priv(dev); + int ret; + + ret = pwm_set_invert(priv->pwm, priv->channel, priv->active_low); + if (ret) + return ret; + + ret = pwm_set_config(priv->pwm, priv->channel, priv->period, priv->duty); + if (ret) + return ret; + + ret = pwm_set_enable(priv->pwm, priv->channel, true); + if (ret) + return ret; + + priv->enabled = true; + + return 0; +} + +static int led_pwm_disable(struct udevice *dev) +{ + struct led_pwm_priv *priv = dev_get_priv(dev); + int ret; + + ret = pwm_set_config(priv->pwm, priv->channel, priv->period, 0); + if (ret) + return ret; + + ret =
Re: [PATCH] led: led_pwm: Add a driver for LEDs connected to PWM
Hi Ivan, On Sun, 27 Feb 2022 at 11:16, Ivan Vozvakhov wrote: > > From: Ivan Vozvakhov > > Add a driver which allows to use of LEDs connected > to PWM (Linux compatible). > MAINTAINERS: add i.vozvakhov as a maintainer of leds-pwm > (required during new functionality adding). > > Signed-off-by: Ivan Vozvakhov > Signed-off-by: Ivan Vozvakhov > --- > > MAINTAINERS| 6 + > doc/device-tree-bindings/leds/leds-pwm.txt | 47 + > drivers/led/Kconfig| 6 + > drivers/led/Makefile | 1 + > drivers/led/led_pwm.c | 189 + > 5 files changed, 249 insertions(+) > create mode 100644 doc/device-tree-bindings/leds/leds-pwm.txt > create mode 100644 drivers/led/led_pwm.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index fb171e0c68..2e8f8cdada 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -869,6 +869,12 @@ F: doc/README.kwbimage > F: doc/kwboot.1 > F: tools/kwb* > > +LED > +M: Ivan Vozvakhov > +S: Supported > +F: doc/device-tree-bindings/leds/leds-pwm.txt > +F: drivers/led/led_pwm.c > + > LOGGING > M: Simon Glass > S: Maintained > diff --git a/doc/device-tree-bindings/leds/leds-pwm.txt > b/doc/device-tree-bindings/leds/leds-pwm.txt > new file mode 100644 > index 00..186e8a848f > --- /dev/null > +++ b/doc/device-tree-bindings/leds/leds-pwm.txt > @@ -0,0 +1,47 @@ > +LEDs connected to PWM (Linux compatible) > + > +Required properties: > +- compatible : should be "pwm-leds". > + > +Each LED is represented as a sub-node of the pwm-leds device. Each > +node's name represents the name of the corresponding LED. > + > +LED sub-node properties: > +- pwms : (required) LED pwm channel, see "pwms property" in > + doc/device-tree-bindings/pwm/pwm.txt > +- label : (optional) LED label, see "label property" in > + doc/device-tree-bindings/led/common.txt > +- max-brightness : (optional, unsigned, default 255) Maximum brightness > possible > + for the LED > +- active-low : (optional, boolean, default false) For PWMs where the LED is > + wired to supply rather than ground > +- u-boot,default-brightness : (optional, unsigned, default 0) Initial state > + of pwm-leds > + > +Example: > + > +leds { > +compatible = "pwm-leds"; > +status = "okay"; > + > +blue { > +label = "led-blue"; > +pwms = < 0 10 0>; > +max-brightness = <255>; > +u-boot,default-brightness = <127>; > +}; > + > +green { > +label = "led-green"; > +pwms = < 0 10 0>; > +max-brightness = <255>; > +u-boot,default-brightness = <127>; > +}; > + > +red { > +label = "led-red"; > +pwms = < 0 10 0>; > +max-brightness = <255>; > +u-boot,default-brightness = <127>; > +}; > +} > diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig > index cc87fbf395..48616e2f55 100644 > --- a/drivers/led/Kconfig > +++ b/drivers/led/Kconfig > @@ -42,6 +42,12 @@ config LED_CORTINA > This option enables support for LEDs connected to the Cortina > Access CA SOCs. > > +config LED_PWM > + bool "LED PWM" > + depends on LED && DM_PWM > + help > + Enable support for LEDs connected to PWM. > + Linux compatible ofdata. > > config LED_BLINK > bool "Support LED blinking" > diff --git a/drivers/led/Makefile b/drivers/led/Makefile > index 8e3ae7f146..c31a59e1aa 100644 > --- a/drivers/led/Makefile > +++ b/drivers/led/Makefile > @@ -7,5 +7,6 @@ obj-y += led-uclass.o > obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o > obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o > obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o > +obj-$(CONFIG_LED_PWM) += led_pwm.o > obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o > obj-$(CONFIG_LED_CORTINA) += led_cortina.o > diff --git a/drivers/led/led_pwm.c b/drivers/led/led_pwm.c > new file mode 100644 > index 00..d36ce4c0df > --- /dev/null > +++ b/drivers/led/led_pwm.c > @@ -0,0 +1,189 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Copyright (C) 2022 VK > + * Author: Ivan Vozvakhov > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define LEDS_PWM_DRIVER_NAME "led_pwm" > + Please add a proper struct comment describing these values and what they mean...e.g. if polarity is true, what does that mean? > +struct led_pwm_priv { > + struct udevice *pwm; > + uint active_low;/* polarity */ > + uint period;/* period_ns */ > + uint duty; > + uint channel; > + bool enabled; > + bool polarity; > +}; > + [..] Regards, Simon
[PATCH] led: led_pwm: Add a driver for LEDs connected to PWM
From: Ivan Vozvakhov Add a driver which allows to use of LEDs connected to PWM (Linux compatible). MAINTAINERS: add i.vozvakhov as a maintainer of leds-pwm (required during new functionality adding). Signed-off-by: Ivan Vozvakhov Signed-off-by: Ivan Vozvakhov --- MAINTAINERS| 6 + doc/device-tree-bindings/leds/leds-pwm.txt | 47 + drivers/led/Kconfig| 6 + drivers/led/Makefile | 1 + drivers/led/led_pwm.c | 189 + 5 files changed, 249 insertions(+) create mode 100644 doc/device-tree-bindings/leds/leds-pwm.txt create mode 100644 drivers/led/led_pwm.c diff --git a/MAINTAINERS b/MAINTAINERS index fb171e0c68..2e8f8cdada 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -869,6 +869,12 @@ F: doc/README.kwbimage F: doc/kwboot.1 F: tools/kwb* +LED +M: Ivan Vozvakhov +S: Supported +F: doc/device-tree-bindings/leds/leds-pwm.txt +F: drivers/led/led_pwm.c + LOGGING M: Simon Glass S: Maintained diff --git a/doc/device-tree-bindings/leds/leds-pwm.txt b/doc/device-tree-bindings/leds/leds-pwm.txt new file mode 100644 index 00..186e8a848f --- /dev/null +++ b/doc/device-tree-bindings/leds/leds-pwm.txt @@ -0,0 +1,47 @@ +LEDs connected to PWM (Linux compatible) + +Required properties: +- compatible : should be "pwm-leds". + +Each LED is represented as a sub-node of the pwm-leds device. Each +node's name represents the name of the corresponding LED. + +LED sub-node properties: +- pwms : (required) LED pwm channel, see "pwms property" in + doc/device-tree-bindings/pwm/pwm.txt +- label : (optional) LED label, see "label property" in + doc/device-tree-bindings/led/common.txt +- max-brightness : (optional, unsigned, default 255) Maximum brightness possible + for the LED +- active-low : (optional, boolean, default false) For PWMs where the LED is + wired to supply rather than ground +- u-boot,default-brightness : (optional, unsigned, default 0) Initial state + of pwm-leds + +Example: + +leds { +compatible = "pwm-leds"; +status = "okay"; + +blue { +label = "led-blue"; +pwms = < 0 10 0>; +max-brightness = <255>; +u-boot,default-brightness = <127>; +}; + +green { +label = "led-green"; +pwms = < 0 10 0>; +max-brightness = <255>; +u-boot,default-brightness = <127>; +}; + +red { +label = "led-red"; +pwms = < 0 10 0>; +max-brightness = <255>; +u-boot,default-brightness = <127>; +}; +} diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index cc87fbf395..48616e2f55 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -42,6 +42,12 @@ config LED_CORTINA This option enables support for LEDs connected to the Cortina Access CA SOCs. +config LED_PWM + bool "LED PWM" + depends on LED && DM_PWM + help + Enable support for LEDs connected to PWM. + Linux compatible ofdata. config LED_BLINK bool "Support LED blinking" diff --git a/drivers/led/Makefile b/drivers/led/Makefile index 8e3ae7f146..c31a59e1aa 100644 --- a/drivers/led/Makefile +++ b/drivers/led/Makefile @@ -7,5 +7,6 @@ obj-y += led-uclass.o obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o +obj-$(CONFIG_LED_PWM) += led_pwm.o obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o obj-$(CONFIG_LED_CORTINA) += led_cortina.o diff --git a/drivers/led/led_pwm.c b/drivers/led/led_pwm.c new file mode 100644 index 00..d36ce4c0df --- /dev/null +++ b/drivers/led/led_pwm.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2022 VK + * Author: Ivan Vozvakhov + */ + +#include +#include +#include +#include +#include +#include +#include + +#define LEDS_PWM_DRIVER_NAME "led_pwm" + +struct led_pwm_priv { + struct udevice *pwm; + uint active_low;/* polarity */ + uint period;/* period_ns */ + uint duty; + uint channel; + bool enabled; + bool polarity; +}; + +static int led_pwm_enable(struct udevice *dev) +{ + struct led_pwm_priv *priv = dev_get_priv(dev); + int ret; + + ret = pwm_set_invert(priv->pwm, priv->channel, priv->polarity); + if (ret) + return ret; + + ret = pwm_set_config(priv->pwm, priv->channel, priv->period, priv->duty); + if (ret) + return ret; + + ret = pwm_set_enable(priv->pwm, priv->channel, true); + if (ret) + return ret; + + priv->enabled = true; + + return 0; +} + +static int led_pwm_disable(struct udevice *dev) +{ + struct led_pwm_priv *priv = dev_get_priv(dev); + int ret; + + ret = pwm_set_config(priv->pwm, priv->channel, priv->period, 0); + if (ret) + return ret; + +