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This adds support for the third (optional) pwm cell to specify the
polarity, which is needed by display backlights for example.
Signed-off-by: Stefan Wahren <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Signed-off-by: Stefan Wahren <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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It's possible that the PWM clock becomes an orphan. So better check the
result of clk_get_rate() in order to prevent a division by zero.
Signed-off-by: Stefan Wahren <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Currently pwm-bcm2835 assumes a fixed clock rate and stores the
resulting scaler in the driver structure. But with the upcoming
PWM clock support for clk-bcm2835 the rate could change, so
calculate the scaler in the ->config() callback.
Signed-off-by: Stefan Wahren <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Add PWM driver for Broadcom BCM2835 processor (Raspberry Pi)
Signed-off-by: Bart Tanghe <[email protected]>
Acked-by: Stephen Warren <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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