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drivers: pwm: nrf: Use HW PWM by default when available

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Enable HW PWM driver instead of the SW one on nRF SoCs where the PWM
peripheral is present.
Default PWM instances are also enabled on Nordic DK boards so that it
is possible to build the basic fade_led sample for them without extra
adjustments.

After the above changes are applied, some configuration alterations
in basic samples blink_led and fade_led become no longer needed.
These are removed. And the blink_led sample is corrected so that it
works with the nRF HW PWM driver as well.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
This commit is contained in:
Andrzej Głąbek 2019-02-05 13:12:43 +01:00 • committed by Anas Nashif
commit e2b38e02bf
13 changed files with 45 additions and 29 deletions
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2
drivers/pwm/Kconfig.nrf5_sw
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@ -8,8 +8,8 @@
menuconfig PWM_NRF5_SW
bool "Nordic Semiconductor nRF5x series S/W PWM"
default y if !PWM_NRFX
depends on PWM && SOC_FAMILY_NRF
default y
help
Enable driver to utilize PWM on the Nordic Semiconductor nRF5x series.
This implementation provides up to 3 pins using one HF timer, two PPI