Hi Uwe, On Thu, 21 Nov 2019 at 22:06, Uwe Kleine-König <[email protected]> wrote: > > On Thu, Nov 21, 2019 at 08:58:59PM +0100, Clément Péron wrote: > > From: Jernej Skrabec <[email protected]> > > > > H6 PWM core needs bus clock to be enabled in order to work. > > > > Add an optional probe for it. > > > > Signed-off-by: Jernej Skrabec <[email protected]> > > Signed-off-by: Clément Péron <[email protected]> > > --- > > drivers/pwm/pwm-sun4i.c | 23 +++++++++++++++++++++++ > > 1 file changed, 23 insertions(+) > > > > diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c > > index 369990ae7d09..66befd8d6f9c 100644 > > --- a/drivers/pwm/pwm-sun4i.c > > +++ b/drivers/pwm/pwm-sun4i.c > > @@ -78,6 +78,7 @@ 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; > > @@ -391,6 +392,14 @@ static int sun4i_pwm_probe(struct platform_device > > *pdev) > > } > > } > > > > + pwm->bus_clk = devm_clk_get_optional(&pdev->dev, "bus"); > > + if (IS_ERR(pwm->bus_clk)) { > > + if (PTR_ERR(pwm->rst) != -EPROBE_DEFER) > > + dev_err(&pdev->dev, "get bus clock failed %pe\n", > > + pwm->bus_clk); > > + return PTR_ERR(pwm->bus_clk); > > + } > > + > > pwm->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL); > > if (IS_ERR(pwm->rst)) { > > if (PTR_ERR(pwm->rst) != -EPROBE_DEFER) > > @@ -407,6 +416,17 @@ static int sun4i_pwm_probe(struct platform_device > > *pdev) > > return ret; > > } > > > > + /* > > + * We're keeping the bus clock on for the sake of simplicity. > > + * Actually it only needs to be on for hardware register accesses. > > + */ > > + ret = clk_prepare_enable(pwm->bus_clk); > > + if (ret) { > > + dev_err(&pdev->dev, "Cannot prepare and enable bus_clk %d\n", > > + ret); > > nitpick: other error messages in this driver start with a lower case > letter. > > Until there is an equivalent for %pe that consumes an int, I suggest to > use > > dev_err(&pdev->dev, "Cannot prepare and enable bus_clk: %pe\n", > ERR_PTR(ret)); > > to benefit from a symbolic error name instead of an error constant.
Ok i will fix both Thanks, Clement > > Best regards > Uwe > > -- > Pengutronix e.K. | Uwe Kleine-König | > Industrial Linux Solutions | https://www.pengutronix.de/ | -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/CAJiuCcfj7rngTgbZQDwjKoLgRGcqsYscBvrCP095zzyASKSqdQ%40mail.gmail.com.
