LED PWM driver #29401
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LED PWM driver #29401
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simonguinot
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erwango,
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area: Boards
area: Devicetree
area: Documentation
area: Samples
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Two commits I used to test this driver on a STM32F070-based board have been accidentally pushed in the initial PR. I removed them. |
gmarull
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Oct 21, 2020
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Oct 21, 2020
This driver supports the PWM driven LEDs. The devices are created from the DT nodes with a compatible property matching "pwm-leds". For each child node a LED is created and its "pwms" phandle's node is used to retrieve the PWM configuration: channel, period and flags. If some of this properties are missing (it is the case for some PWM controllers), then reasonable default values are used. This driver implements the following LED API methods: - led_on - led_off - led_blink - led_set_brightness Signed-off-by: Simon Guinot <[email protected]>
This sample allows to test the led-pwm driver. The first "pwm-leds" compatible device instance found in DT is used. For each LEDs attached to this device (child nodes) the same test pattern (described below) is executed. The LED API functions are used to control the LEDs. Test pattern: For each PWM LEDs (one after the other): - turn on - turn off - increase the brightness gradually up to the maximum level - blink (0.1 sec on, 0.1 sec off) - blink (1 sec on, 1 sec off) - turn off Signed-off-by: Simon Guinot <[email protected]>
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This pull request adds a driver (and its test sample) for the PWM driven LEDs.
The devices are created from the DT nodes with a compatible property matching "pwm-leds". For each child node a LED is created and its "pwms" phandle's node is used to retrieve the PWM configuration: channel, period and flags. If some of this properties are missing (it is the case for some PWM controllers), then reasonable default values are used.
This driver implements the following LED API methods: