Hi Christophe,
On Fri, 10 May 2024 at 01:35, Christophe JAILLET
<christophe.jaillet@xxxxxxxxxx> wrote:
>
> Le 09/05/2024 à 08:47, Anand Moon a écrit :
> > The devm_clk_get_enabled() helpers:
> > - call devm_clk_get()
> > - call clk_prepare_enable() and register what is needed in order to
> > call clk_disable_unprepare() when needed, as a managed resource.
> >
> > This simplifies the code and avoids the calls to clk_disable_unprepare().
> >
> > While at it, use dev_err_probe consistently, and use its return value
> > to return the error code.
> >
> > Signed-off-by: Anand Moon <linux.amoon@xxxxxxxxx>
> > ---
> > V4 - wrap up the error messagee within 80 char
> > v3 - No change
> > v2 - No change
> > ---
> > drivers/devfreq/exynos-bus.c | 22 +++++-----------------
> > 1 file changed, 5 insertions(+), 17 deletions(-)
> >
> > diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> > index 00118580905a..7d06c476d8e9 100644
> > --- a/drivers/devfreq/exynos-bus.c
> > +++ b/drivers/devfreq/exynos-bus.c
> > @@ -160,7 +160,6 @@ static void exynos_bus_exit(struct device *dev)
> > platform_device_unregister(bus->icc_pdev);
> >
> > dev_pm_opp_of_remove_table(dev);
> > - clk_disable_unprepare(bus->clk);
> > dev_pm_opp_put_regulators(bus->opp_token);
> > }
> >
> > @@ -171,7 +170,6 @@ static void exynos_bus_passive_exit(struct device *dev)
> > platform_device_unregister(bus->icc_pdev);
> >
> > dev_pm_opp_of_remove_table(dev);
> > - clk_disable_unprepare(bus->clk);
> > }
> >
> > static int exynos_bus_parent_parse_of(struct device_node *np,
> > @@ -247,23 +245,16 @@ static int exynos_bus_parse_of(struct device_node *np,
> > int ret;
> >
> > /* Get the clock to provide each bus with source clock */
> > - bus->clk = devm_clk_get(dev, "bus");
> > - if (IS_ERR(bus->clk)) {
> > - dev_err(dev, "failed to get bus clock\n");
> > - return PTR_ERR(bus->clk);
> > - }
> > -
> > - ret = clk_prepare_enable(bus->clk);
> > - if (ret < 0) {
> > - dev_err(dev, "failed to get enable clock\n");
> > - return ret;
> > - }
> > + bus->clk = devm_clk_get_enabled(dev, "bus");
> > + if (IS_ERR(bus->clk))
> > + return dev_err_probe(dev, PTR_ERR(bus->clk),
> > + "failed to get bus clock\n");
> >
> > /* Get the freq and voltage from the OPP table to scale the bus freq */
> > ret = dev_pm_opp_of_add_table(dev);
> > if (ret < 0) {
> > dev_err(dev, "failed to get OPP table\n");
> > - goto err_clk;
> > + return ret;
> > }
> >
> > rate = clk_get_rate(bus->clk);
> > @@ -281,8 +272,6 @@ static int exynos_bus_parse_of(struct device_node *np,
> >
> > err_opp:
> > dev_pm_opp_of_remove_table(dev);
> > -err_clk:
> > - clk_disable_unprepare(bus->clk);
> >
> > return ret;
> > }
> > @@ -453,7 +442,6 @@ static int exynos_bus_probe(struct platform_device *pdev)
> >
> > err:
> > dev_pm_opp_of_remove_table(dev);
> > - clk_disable_unprepare(bus->clk);
> > err_reg:
> > dev_pm_opp_put_regulators(bus->opp_token);
> >
>
> Hi,
>
> If the patch is correct, I think that clk in struct exynos_bus can be
> easily be removed as well.
>
Yes, you are correct, I will submit a patch following these changes.
> CJ
Thanks
-Anand
