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aw_pwm: ensure sane configuration, just in case

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Make sure that the hardware is configured to cycle mode and that the
bypass is disabled.

MFC after:	2 weeks
This commit is contained in:
Andriy Gapon 2020-09-25 07:40:56 +00:00
parent fc1ec731c8
commit 6957a14075
1 changed files with 7 additions and 0 deletions
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7
sys/arm/allwinner/aw_pwm.c
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@ -290,6 +290,13 @@ aw_pwm_channel_config(device_t dev, u_int channel, u_int period, u_int duty)
/* Write the prescalar */ /* Write the prescalar */
reg &= ~AW_PWM_CTRL_PRESCALE_MASK; reg &= ~AW_PWM_CTRL_PRESCALE_MASK;
reg |= prescaler; reg |= prescaler;
reg &= ~AW_PWM_CTRL_MODE_MASK;
reg |= AW_PWM_CTRL_CYCLE_MODE;
reg &= ~AW_PWM_CTRL_PULSE_START;
reg &= ~AW_PWM_CTRL_CLK_BYPASS;
AW_PWM_WRITE(sc, AW_PWM_CTRL, reg); AW_PWM_WRITE(sc, AW_PWM_CTRL, reg);
/* Write the total/active cycles */ /* Write the total/active cycles */