* [PATCH v5 0/3] Add Turris Omnia LEDs driver
@ 2020-07-16 11:40 Marek Behún
2020-07-16 11:40 ` [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding Marek Behún
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Marek Behún @ 2020-07-16 11:40 UTC (permalink / raw)
To: linux-leds; +Cc: Pavel Machek, jacek.anaszewski, Dan Murphy, Marek Behún
Hi,
this version addresses some of Dan's suggestions. Uses the multicolor
framework.
Marek
changes since v4:
- fixed a typo in dt-binding
- change to dt-binding documentation as suggested by Dan Murphy so that
it is less confusing
- cleaning up some things in the code addressed by Dan Murphy
- added sysfs ABI documentation for the brightness file controlling the
brightness of the whole panel
changes since v3:
- added a note in yaml scheme to the description of multi-led property
that no subnodes for the specific channels are needed since this
controller only supports RGB LEDs. A comment into the device-tree
example in the yaml scheme is added saying the same thing.
changes since v2:
- using multicolor LED framework now, major rewrite
- added support for global brightness (Omnia has a button which can
switch between 8 levels of intensity of all the LEDs at once, but
in reality any value between 0% and 100% can be set, and we want to
access this setting via software)
Marek Behún (3):
dt-bindings: leds: add cznic,turris-omnia-leds binding
leds: initial support for Turris Omnia LEDs
Documentation: ABI: leds-turris-omnia: document sysfs attribute
.../sysfs-class-led-driver-turris-omnia | 14 +
.../leds/cznic,turris-omnia-leds.yaml | 88 ++++++
drivers/leds/Kconfig | 11 +
drivers/leds/Makefile | 1 +
drivers/leds/leds-turris-omnia.c | 293 ++++++++++++++++++
5 files changed, 407 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia
create mode 100644 Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml
create mode 100644 drivers/leds/leds-turris-omnia.c
--
2.26.2
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding 2020-07-16 11:40 [PATCH v5 0/3] Add Turris Omnia LEDs driver Marek Behún @ 2020-07-16 11:40 ` Marek Behún 2020-07-16 14:54 ` Rob Herring 2020-07-16 11:40 ` [PATCH v5 2/3] leds: initial support for Turris Omnia LEDs Marek Behún 2020-07-16 11:40 ` [PATCH v5 3/3] Documentation: ABI: leds-turris-omnia: document sysfs attribute Marek Behún 2 siblings, 1 reply; 6+ messages in thread From: Marek Behún @ 2020-07-16 11:40 UTC (permalink / raw) To: linux-leds Cc: Pavel Machek, jacek.anaszewski, Dan Murphy, Marek Behún, Rob Herring, devicetree Add device-tree bindings documentation for Turris Omnia RGB LEDs. Signed-off-by: Marek Behún <marek.behun@nic.cz> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org --- .../leds/cznic,turris-omnia-leds.yaml | 88 +++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml diff --git a/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml b/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml new file mode 100644 index 000000000000..bfe19aee0805 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml @@ -0,0 +1,88 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/cznic,turris-omnia-leds.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: CZ.NIC's Turris Omnia LEDs driver + +maintainers: + - Marek Behún <marek.behun@nic.cz> + +description: + This module adds support for the RGB LEDs found on the front panel of the + Turris Omnia router. There are 12 RGB LEDs that are controlled by a + microcontroller that communicates via the I2C bus. Each LED is described + as a subnode of this I2C device. + +properties: + compatible: + const: cznic,turris-omnia-leds + + reg: + description: I2C slave address of the microcontroller. + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^multi-led[0-9a-f]$": + type: object + allOf: + - $ref: leds-class-multicolor.yaml# + description: + This node represents one of the RGB LED devices on Turris Omnia. + No subnodes need to be added for subchannels since this controller only + supports RGB LEDs. + + properties: + reg: + minimum: 0 + maximum: 11 + description: + This property identifies one of the LEDs on the front panel of the + Turris Omnia router. + + required: + - reg + +examples: + - | + + #include <dt-bindings/leds/common.h> + + i2c0 { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@2b { + compatible = "cznic,turris-omnia-leds"; + reg = <0x2b>; + #address-cells = <1>; + #size-cells = <0>; + + multi-led@0 { + /* + * No subnodes are needed, this controller only supports RGB + * LEDs. + */ + reg = <0>; + color = <LED_COLOR_ID_MULTI>; + function = LED_FUNCTION_POWER; + linux,default-trigger = "heartbeat"; + }; + + multi-led@a { + reg = <0xa>; + color = <LED_COLOR_ID_MULTI>; + function = LED_FUNCTION_INDICATOR; + function-enumerator = <1>; + }; + }; + }; + +... -- 2.26.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding 2020-07-16 11:40 ` [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding Marek Behún @ 2020-07-16 14:54 ` Rob Herring 0 siblings, 0 replies; 6+ messages in thread From: Rob Herring @ 2020-07-16 14:54 UTC (permalink / raw) To: Marek Behún Cc: linux-leds, Pavel Machek, jacek.anaszewski, Dan Murphy, devicetree On Thu, Jul 16, 2020 at 01:40:45PM +0200, Marek Behún wrote: > Add device-tree bindings documentation for Turris Omnia RGB LEDs. > > Signed-off-by: Marek Behún <marek.behun@nic.cz> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: devicetree@vger.kernel.org > --- > .../leds/cznic,turris-omnia-leds.yaml | 88 +++++++++++++++++++ > 1 file changed, 88 insertions(+) > create mode 100644 Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml > > diff --git a/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml b/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml > new file mode 100644 > index 000000000000..bfe19aee0805 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml > @@ -0,0 +1,88 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/leds/cznic,turris-omnia-leds.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: CZ.NIC's Turris Omnia LEDs driver > + > +maintainers: > + - Marek Behún <marek.behun@nic.cz> > + > +description: > + This module adds support for the RGB LEDs found on the front panel of the > + Turris Omnia router. There are 12 RGB LEDs that are controlled by a > + microcontroller that communicates via the I2C bus. Each LED is described > + as a subnode of this I2C device. > + > +properties: > + compatible: > + const: cznic,turris-omnia-leds > + > + reg: > + description: I2C slave address of the microcontroller. > + maxItems: 1 > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 0 > + > +patternProperties: > + "^multi-led[0-9a-f]$": > + type: object > + allOf: > + - $ref: leds-class-multicolor.yaml# > + description: > + This node represents one of the RGB LED devices on Turris Omnia. > + No subnodes need to be added for subchannels since this controller only > + supports RGB LEDs. > + > + properties: > + reg: > + minimum: 0 > + maximum: 11 > + description: > + This property identifies one of the LEDs on the front panel of the > + Turris Omnia router. > + > + required: > + - reg > + Add: additionalProperties: false With that, Reviewed-by: Rob Herring <robh@kernel.org> ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v5 2/3] leds: initial support for Turris Omnia LEDs 2020-07-16 11:40 [PATCH v5 0/3] Add Turris Omnia LEDs driver Marek Behún 2020-07-16 11:40 ` [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding Marek Behún @ 2020-07-16 11:40 ` Marek Behún 2020-07-16 15:10 ` Dan Murphy 2020-07-16 11:40 ` [PATCH v5 3/3] Documentation: ABI: leds-turris-omnia: document sysfs attribute Marek Behún 2 siblings, 1 reply; 6+ messages in thread From: Marek Behún @ 2020-07-16 11:40 UTC (permalink / raw) To: linux-leds; +Cc: Pavel Machek, jacek.anaszewski, Dan Murphy, Marek Behún This adds basic support for LEDs on the front side of CZ.NIC's Turris Omnia router. There are 12 RGB LEDs. The controller supports HW triggering mode for the LEDs, but this driver does not support it yet, and sets all the LEDs defined in device-tree into SW mode upon probe. This driver uses the multi color LED framework. Signed-off-by: Marek Behún <marek.behun@nic.cz> --- drivers/leds/Kconfig | 11 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-turris-omnia.c | 293 +++++++++++++++++++++++++++++++ 3 files changed, 305 insertions(+) create mode 100644 drivers/leds/leds-turris-omnia.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 0d034453eeb9..125349824bb6 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -176,6 +176,17 @@ config LEDS_EL15203000 To compile this driver as a module, choose M here: the module will be called leds-el15203000. +config LEDS_TURRIS_OMNIA + tristate "LED support for CZ.NIC's Turris Omnia" + depends on LEDS_CLASS_MULTI_COLOR + depends on I2C + depends on MACH_ARMADA_38X || COMPILE_TEST + depends on OF + help + This option enables basic support for the LEDs found on the front + side of CZ.NIC's Turris Omnia router. There are 12 RGB LEDs on the + front panel. + config LEDS_LM3530 tristate "LCD Backlight driver for LM3530" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 53a752c32e67..664ca1d719c4 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -87,6 +87,7 @@ obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o +obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds-turris-omnia.o obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o diff --git a/drivers/leds/leds-turris-omnia.c b/drivers/leds/leds-turris-omnia.c new file mode 100644 index 000000000000..c735e837ef48 --- /dev/null +++ b/drivers/leds/leds-turris-omnia.c @@ -0,0 +1,293 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CZ.NIC's Turris Omnia LEDs driver + * + * 2020 by Marek Behun <marek.behun@nic.cz> + */ + +#include <linux/i2c.h> +#include <linux/led-class-multicolor.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include "leds.h" + +#define OMNIA_BOARD_LEDS 12 +#define OMNIA_LED_NUM_CHANNELS 3 + +#define CMD_LED_MODE 3 +#define CMD_LED_MODE_LED(l) ((l) & 0x0f) +#define CMD_LED_MODE_USER 0x10 + +#define CMD_LED_STATE 4 +#define CMD_LED_STATE_LED(l) ((l) & 0x0f) +#define CMD_LED_STATE_ON 0x10 + +#define CMD_LED_COLOR 5 +#define CMD_LED_SET_BRIGHTNESS 7 +#define CMD_LED_GET_BRIGHTNESS 8 + +#define OMNIA_CMD 0 + +#define OMNIA_CMD_LED_COLOR_LED 1 +#define OMNIA_CMD_LED_COLOR_R 2 +#define OMNIA_CMD_LED_COLOR_G 3 +#define OMNIA_CMD_LED_COLOR_B 4 +#define OMNIA_CMD_LED_COLOR_LEN 5 + +struct omnia_led { + struct led_classdev_mc mc_cdev; + struct mc_subled subled_info[OMNIA_LED_NUM_CHANNELS]; + int reg; +}; + +#define to_omnia_led(l) container_of(l, struct omnia_led, mc_cdev) + +struct omnia_leds { + struct i2c_client *client; + struct mutex lock; + struct omnia_led leds[]; +}; + +static int omnia_led_brightness_set_blocking(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev); + struct omnia_leds *leds = dev_get_drvdata(cdev->dev->parent); + struct omnia_led *led = to_omnia_led(mc_cdev); + u8 buf[OMNIA_CMD_LED_COLOR_LEN], state; + int ret; + + mutex_lock(&leds->lock); + + led_mc_calc_color_components(&led->mc_cdev, brightness); + + buf[OMNIA_CMD] = CMD_LED_COLOR; + buf[OMNIA_CMD_LED_COLOR_LED] = led->reg; + buf[OMNIA_CMD_LED_COLOR_R] = mc_cdev->subled_info[0].brightness; + buf[OMNIA_CMD_LED_COLOR_G] = mc_cdev->subled_info[1].brightness; + buf[OMNIA_CMD_LED_COLOR_B] = mc_cdev->subled_info[2].brightness; + + state = CMD_LED_STATE_LED(led->reg); + if (buf[OMNIA_CMD_LED_COLOR_R] || buf[OMNIA_CMD_LED_COLOR_G] || buf[OMNIA_CMD_LED_COLOR_B]) + state |= CMD_LED_STATE_ON; + + ret = i2c_smbus_write_byte_data(leds->client, CMD_LED_STATE, state); + if (ret >= 0 && (state & CMD_LED_STATE_ON)) + ret = i2c_master_send(leds->client, buf, 5); + + mutex_unlock(&leds->lock); + + return ret; +} + +static int omnia_led_register(struct i2c_client *client, struct omnia_led *led, + struct device_node *np) +{ + struct led_init_data init_data = {}; + struct device *dev = &client->dev; + struct led_classdev *cdev; + int ret, color; + + ret = of_property_read_u32(np, "reg", &led->reg); + if (ret || led->reg >= OMNIA_BOARD_LEDS) { + dev_warn(dev, + "Node %pOF: must contain 'reg' property with values between 0 and %i\n", + np, OMNIA_BOARD_LEDS - 1); + return 0; + } + + ret = of_property_read_u32(np, "color", &color); + if (ret || color != LED_COLOR_ID_MULTI) { + dev_warn(dev, + "Node %pOF: must contain 'color' property with value LED_COLOR_ID_MULTI\n", + np); + return 0; + } + + led->subled_info[0].color_index = LED_COLOR_ID_RED; + led->subled_info[0].channel = 0; + led->subled_info[1].color_index = LED_COLOR_ID_GREEN; + led->subled_info[1].channel = 1; + led->subled_info[2].color_index = LED_COLOR_ID_BLUE; + led->subled_info[2].channel = 2; + + led->mc_cdev.subled_info = led->subled_info; + led->mc_cdev.num_colors = OMNIA_LED_NUM_CHANNELS; + + init_data.fwnode = &np->fwnode; + + cdev = &led->mc_cdev.led_cdev; + cdev->max_brightness = 255; + cdev->brightness_set_blocking = omnia_led_brightness_set_blocking; + + of_property_read_string(np, "linux,default-trigger", &cdev->default_trigger); + + /* put the LED into software mode */ + ret = i2c_smbus_write_byte_data(client, CMD_LED_MODE, + CMD_LED_MODE_LED(led->reg) | + CMD_LED_MODE_USER); + if (ret < 0) { + dev_err(dev, "Cannot set LED %pOF to software mode: %i\n", np, ret); + return ret; + } + + /* disable the LED */ + ret = i2c_smbus_write_byte_data(client, CMD_LED_STATE, CMD_LED_STATE_LED(led->reg)); + if (ret < 0) { + dev_err(dev, "Cannot set LED %pOF brightness: %i\n", np, ret); + return ret; + } + + ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc_cdev, &init_data); + if (ret < 0) { + dev_err(dev, "Cannot register LED %pOF: %i\n", np, ret); + return ret; + } + + return 1; +} + +/* + * On the front panel of the Turris Omnia router there is also a button which can be used to control + * the intensity of all the LEDs at once, so that if they are too bright, user can dim them. + * The microcontroller cycles between 8 levels of this global brightness (from 100% to 0%), but this + * setting can have any integer value between 0 and 100. It is therefore convenient to be able to + * change this setting from software. + * We expose this setting via a sysfs attribute file called "brightness". This file lives in the + * device directory of the LED controller, not an individual LED, so it should not confuse users. + */ +static ssize_t brightness_show(struct device *dev, struct device_attribute *a, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct omnia_leds *leds = i2c_get_clientdata(client); + int ret; + + mutex_lock(&leds->lock); + ret = i2c_smbus_read_byte_data(client, CMD_LED_GET_BRIGHTNESS); + mutex_unlock(&leds->lock); + + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", ret); +} + +static ssize_t brightness_store(struct device *dev, struct device_attribute *a, const char *buf, + size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct omnia_leds *leds = i2c_get_clientdata(client); + unsigned int brightness; + int ret; + + if (sscanf(buf, "%u", &brightness) != 1) + return -EINVAL; + + if (brightness > 100) + return -EINVAL; + + mutex_lock(&leds->lock); + ret = i2c_smbus_write_byte_data(client, CMD_LED_SET_BRIGHTNESS, (u8) brightness); + mutex_unlock(&leds->lock); + + if (ret < 0) + return ret; + + return count; +} +static DEVICE_ATTR_RW(brightness); + +static struct attribute *omnia_led_controller_attrs[] = { + &dev_attr_brightness.attr, + NULL, +}; +ATTRIBUTE_GROUPS(omnia_led_controller); + +static int omnia_leds_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct device_node *np = dev->of_node, *child; + struct omnia_leds *leds; + struct omnia_led *led; + int ret, count; + + count = of_get_available_child_count(np); + if (!count) { + dev_err(dev, "LEDs are not defined in device tree!\n"); + return -ENODEV; + } else if (count > OMNIA_BOARD_LEDS) { + dev_err(dev, "Too many LEDs defined in device tree!\n"); + return -EINVAL; + } + + leds = devm_kzalloc(dev, struct_size(leds, leds, count), GFP_KERNEL); + if (!leds) + return -ENOMEM; + + leds->client = client; + i2c_set_clientdata(client, leds); + + mutex_init(&leds->lock); + + led = &leds->leds[0]; + for_each_available_child_of_node(np, child) { + ret = omnia_led_register(client, led, child); + if (ret < 0) + return ret; + + led += ret; + } + + if (devm_device_add_groups(dev, omnia_led_controller_groups)) + dev_warn(dev, "Could not add attribute group!\n"); + + return 0; +} + +static int omnia_leds_remove(struct i2c_client *client) +{ + u8 buf[OMNIA_CMD_LED_COLOR_LEN]; + + /* put all LEDs into default (HW triggered) mode */ + i2c_smbus_write_byte_data(client, CMD_LED_MODE, + CMD_LED_MODE_LED(OMNIA_BOARD_LEDS)); + + /* set all LEDs color to [255, 255, 255] */ + buf[OMNIA_CMD] = CMD_LED_COLOR; + buf[OMNIA_CMD_LED_COLOR_LED] = OMNIA_BOARD_LEDS; + buf[OMNIA_CMD_LED_COLOR_R] = 255; + buf[OMNIA_CMD_LED_COLOR_G] = 255; + buf[OMNIA_CMD_LED_COLOR_B] = 255; + + i2c_master_send(client, buf, 5); + + return 0; +} + +static const struct of_device_id of_omnia_leds_match[] = { + { .compatible = "cznic,turris-omnia-leds", }, + {}, +}; + +static const struct i2c_device_id omnia_id[] = { + { "omnia", 0 }, + { } +}; + +static struct i2c_driver omnia_leds_driver = { + .probe = omnia_leds_probe, + .remove = omnia_leds_remove, + .id_table = omnia_id, + .driver = { + .name = "leds-turris-omnia", + .of_match_table = of_omnia_leds_match, + }, +}; + +module_i2c_driver(omnia_leds_driver); + +MODULE_AUTHOR("Marek Behun <marek.behun@nic.cz>"); +MODULE_DESCRIPTION("CZ.NIC's Turris Omnia LEDs"); +MODULE_LICENSE("GPL v2"); -- 2.26.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v5 2/3] leds: initial support for Turris Omnia LEDs 2020-07-16 11:40 ` [PATCH v5 2/3] leds: initial support for Turris Omnia LEDs Marek Behún @ 2020-07-16 15:10 ` Dan Murphy 0 siblings, 0 replies; 6+ messages in thread From: Dan Murphy @ 2020-07-16 15:10 UTC (permalink / raw) To: Marek Behún, linux-leds; +Cc: Pavel Machek, jacek.anaszewski Marek On 7/16/20 6:40 AM, Marek Behún wrote: > This adds basic support for LEDs on the front side of CZ.NIC's Turris > Omnia router. > > There are 12 RGB LEDs. The controller supports HW triggering mode for > the LEDs, but this driver does not support it yet, and sets all the LEDs > defined in device-tree into SW mode upon probe. > > This driver uses the multi color LED framework. As Pavel pointed out to me s/multi color/multicolor > Signed-off-by: Marek Behún <marek.behun@nic.cz> > --- > drivers/leds/Kconfig | 11 ++ > drivers/leds/Makefile | 1 + > drivers/leds/leds-turris-omnia.c | 293 +++++++++++++++++++++++++++++++ > 3 files changed, 305 insertions(+) > create mode 100644 drivers/leds/leds-turris-omnia.c > > diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig > index 0d034453eeb9..125349824bb6 100644 > --- a/drivers/leds/Kconfig > +++ b/drivers/leds/Kconfig > @@ -176,6 +176,17 @@ config LEDS_EL15203000 > To compile this driver as a module, choose M here: the module > will be called leds-el15203000. > > +config LEDS_TURRIS_OMNIA > + tristate "LED support for CZ.NIC's Turris Omnia" > + depends on LEDS_CLASS_MULTI_COLOR > + depends on I2C > + depends on MACH_ARMADA_38X || COMPILE_TEST > + depends on OF > + help > + This option enables basic support for the LEDs found on the front > + side of CZ.NIC's Turris Omnia router. There are 12 RGB LEDs on the > + front panel. > + > config LEDS_LM3530 > tristate "LCD Backlight driver for LM3530" > depends on LEDS_CLASS > diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile > index 53a752c32e67..664ca1d719c4 100644 > --- a/drivers/leds/Makefile > +++ b/drivers/leds/Makefile > @@ -87,6 +87,7 @@ obj-$(CONFIG_LEDS_TCA6507) += leds-tca6507.o > obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o > obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o > obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o > +obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds-turris-omnia.o > obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o > obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o > obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o > diff --git a/drivers/leds/leds-turris-omnia.c b/drivers/leds/leds-turris-omnia.c > new file mode 100644 > index 000000000000..c735e837ef48 > --- /dev/null > +++ b/drivers/leds/leds-turris-omnia.c > @@ -0,0 +1,293 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * CZ.NIC's Turris Omnia LEDs driver > + * > + * 2020 by Marek Behun <marek.behun@nic.cz> > + */ > + > +#include <linux/i2c.h> > +#include <linux/led-class-multicolor.h> > +#include <linux/module.h> > +#include <linux/mutex.h> > +#include <linux/of.h> > +#include "leds.h" > + > +#define OMNIA_BOARD_LEDS 12 > +#define OMNIA_LED_NUM_CHANNELS 3 > + > +#define CMD_LED_MODE 3 > +#define CMD_LED_MODE_LED(l) ((l) & 0x0f) > +#define CMD_LED_MODE_USER 0x10 > + > +#define CMD_LED_STATE 4 > +#define CMD_LED_STATE_LED(l) ((l) & 0x0f) > +#define CMD_LED_STATE_ON 0x10 > + > +#define CMD_LED_COLOR 5 > +#define CMD_LED_SET_BRIGHTNESS 7 > +#define CMD_LED_GET_BRIGHTNESS 8 > + > +#define OMNIA_CMD 0 > + > +#define OMNIA_CMD_LED_COLOR_LED 1 > +#define OMNIA_CMD_LED_COLOR_R 2 > +#define OMNIA_CMD_LED_COLOR_G 3 > +#define OMNIA_CMD_LED_COLOR_B 4 > +#define OMNIA_CMD_LED_COLOR_LEN 5 > + > +struct omnia_led { > + struct led_classdev_mc mc_cdev; > + struct mc_subled subled_info[OMNIA_LED_NUM_CHANNELS]; > + int reg; > +}; > + > +#define to_omnia_led(l) container_of(l, struct omnia_led, mc_cdev) > + Still funky spacing here Otherwise Reviewed-by: Dan Murphy <dmurphy@ti.com> ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v5 3/3] Documentation: ABI: leds-turris-omnia: document sysfs attribute 2020-07-16 11:40 [PATCH v5 0/3] Add Turris Omnia LEDs driver Marek Behún 2020-07-16 11:40 ` [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding Marek Behún 2020-07-16 11:40 ` [PATCH v5 2/3] leds: initial support for Turris Omnia LEDs Marek Behún @ 2020-07-16 11:40 ` Marek Behún 2 siblings, 0 replies; 6+ messages in thread From: Marek Behún @ 2020-07-16 11:40 UTC (permalink / raw) To: linux-leds; +Cc: Pavel Machek, jacek.anaszewski, Dan Murphy, Marek Behún Document the global brightness attribute for the Turris Omnia LED controller. Signed-off-by: Marek Behún <marek.behun@nic.cz> --- .../testing/sysfs-class-led-driver-turris-omnia | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia diff --git a/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia new file mode 100644 index 000000000000..795a5de12fc1 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-led-driver-turris-omnia @@ -0,0 +1,14 @@ +What: /sys/class/leds/<led>/device/brightness +Date: July 2020 +KernelVersion: 5.9 +Contact: Marek Behún <marek.behun@nic.cz> +Description: (RW) On the front panel of the Turris Omnia router there is also + a button which can be used to control the intensity of all the + LEDs at once, so that if they are too bright, user can dim them. + + The microcontroller cycles between 8 levels of this global + brightness (from 100% to 0%), but this setting can have any + integer value between 0 and 100. It is therefore convenient to be + able to change this setting from software. + + Format: %i -- 2.26.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-07-16 15:10 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-07-16 11:40 [PATCH v5 0/3] Add Turris Omnia LEDs driver Marek Behún 2020-07-16 11:40 ` [PATCH v5 1/3] dt-bindings: leds: add cznic,turris-omnia-leds binding Marek Behún 2020-07-16 14:54 ` Rob Herring 2020-07-16 11:40 ` [PATCH v5 2/3] leds: initial support for Turris Omnia LEDs Marek Behún 2020-07-16 15:10 ` Dan Murphy 2020-07-16 11:40 ` [PATCH v5 3/3] Documentation: ABI: leds-turris-omnia: document sysfs attribute Marek Behún
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