On Wed, 30 Mar 2016, Michael Turquette wrote:
> Quoting Lee Jones (2016-02-12 00:02:54)
> > On Thu, 11 Feb 2016, Michael Turquette wrote:
> >
> > > From: Lee Jones <lee.jones@xxxxxxxxxx>
> > >
> > > This call matches clocks which have been marked as critical in DT
> > > and sets the appropriate flag. These flags can then be used to
> > > mark the clock core flags appropriately prior to registration.
> > >
> > > Legacy bindings requiring this feature must add the clock-critical
> > > property to their binding descriptions, as it is not a part of
> > > common-clock binding.
> > >
> > > Cc: devicetree@xxxxxxxxxxxxxxx
> > > Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
> > > Signed-off-by: Michael Turquette <mturquette@xxxxxxxxxxxx>
> > > ---
> > > Changed in vWhatever:
> > > * Added kerneldoc
> > > * Moved to clk.c, removed static inline
> > > * s/of_clk_mark_if_critical/of_clk_detect_critical/
> >
> > Looks like you didn't fold this change in.
> >
> > Only the kerneldoc is correct.
>
> Thanks for the catch. I've fixed it and applied patches 1-3 to clk-next.
> Patches 4-6 are turning up some bugs in other code that need to be fixed
> before they are applied.
Thanks Mike. \o/
> > > * s/critical-clock/clock-critical/
> > >
> > > drivers/clk/clk.c | 35 +++++++++++++++++++++++++++++++++++
> > > include/linux/clk-provider.h | 8 +++++++-
> > > 2 files changed, 42 insertions(+), 1 deletion(-)
> >
> > Appart from the small aforementioned issue, the changes look good to
> > me.
> >
> > > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > > index 39f9527..5181a15 100644
> > > --- a/drivers/clk/clk.c
> > > +++ b/drivers/clk/clk.c
> > > @@ -3202,6 +3202,41 @@ static int parent_ready(struct device_node *np)
> > > }
> > >
> > > /**
> > > + * of_clk_detect_critical() - set CLK_IS_CRITICAL flag from Device Tree
> > > + * @np: Device node pointer associated with clock provider
> > > + * @index: clock index
> > > + * @flags: pointer to clk_core->flags
> > > + *
> > > + * Detects if the clock-critical property exists and, if so, sets the
> > > + * corresponding CLK_IS_CRITICAL flag.
> > > + *
> > > + * Do not use this function. It exists only for legacy Device Tree
> > > + * bindings, such as the one-clock-per-node style that are outdated.
> > > + * Those bindings typically put all clock data into .dts and the Linux
> > > + * driver has no clock data, thus making it impossible to set this flag
> > > + * correctly from the driver. Only those drivers may call
> > > + * of_clk_detect_critical from their setup functions.
> > > + *
> > > + * Return: error code or zero on success
> > > + */
> > > +int of_clk_mark_if_critical(struct device_node *np,
> > > + int index, unsigned long *flags)
> > > +{
> > > + struct property *prop;
> > > + const __be32 *cur;
> > > + uint32_t idx;
> > > +
> > > + if (!np || !flags)
> > > + return -EINVAL;
> > > +
> > > + of_property_for_each_u32(np, "clock-critical", prop, cur, idx)
> > > + if (index == idx)
> > > + *flags |= CLK_IS_CRITICAL;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +/**
> > > * of_clk_init() - Scan and init clock providers from the DT
> > > * @matches: array of compatible values and init functions for providers.
> > > *
> > > diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
> > > index 1d986ea..d15d3cc 100644
> > > --- a/include/linux/clk-provider.h
> > > +++ b/include/linux/clk-provider.h
> > > @@ -705,7 +705,8 @@ int of_clk_get_parent_count(struct device_node *np);
> > > int of_clk_parent_fill(struct device_node *np, const char **parents,
> > > unsigned int size);
> > > const char *of_clk_get_parent_name(struct device_node *np, int index);
> > > -
> > > +int of_clk_mark_if_critical(struct device_node *np, int index,
> > > + unsigned long *flags);
> > > void of_clk_init(const struct of_device_id *matches);
> > >
> > > #else /* !CONFIG_OF */
> > > @@ -742,6 +743,11 @@ static inline const char *of_clk_get_parent_name(struct device_node *np,
> > > {
> > > return NULL;
> > > }
> > > +static inline int of_clk_mark_if_critical(struct device_node *np, int index,
> > > + unsigned long *flags)
> > > +{
> > > + return 0;
> > > +}
> > > static inline void of_clk_init(const struct of_device_id *matches) {}
> > > #endif /* CONFIG_OF */
> > >
> >
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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