Hello, On Fri, Jul 26, 2019 at 08:40:42PM +0200, Jernej Skrabec wrote: > H6 PWM core needs bus clock to be enabled in order to work. > > Add a quirk for it. > > Signed-off-by: Jernej Skrabec <[email protected]> > --- > drivers/pwm/pwm-sun4i.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c > index 1b7be8fbde86..7d3ac3f2dc3f 100644 > --- a/drivers/pwm/pwm-sun4i.c > +++ b/drivers/pwm/pwm-sun4i.c > @@ -72,6 +72,7 @@ static const u32 prescaler_table[] = { > }; > > struct sun4i_pwm_data { > + bool has_bus_clock; > bool has_prescaler_bypass; > bool has_reset; > unsigned int npwm; > @@ -79,6 +80,7 @@ struct sun4i_pwm_data { > > struct sun4i_pwm_chip { > struct pwm_chip chip; > + struct clk *bus_clk; > struct clk *clk; > struct reset_control *rst; > void __iomem *base; > @@ -382,6 +384,16 @@ static int sun4i_pwm_probe(struct platform_device *pdev) > reset_control_deassert(pwm->rst); > } > > + if (pwm->data->has_bus_clock) { > + pwm->bus_clk = devm_clk_get(&pdev->dev, "bus");
Similar to my suggestion in patch 2: I'd use devm_clk_get_optional() and drop struct sun4i_pwm_data::has_bus_clock. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |
