On Mon, Aug 19, 2013 at 02:53:37PM -0600, Stephen Warren wrote:
> On 08/19/2013 02:10 PM, Thierry Reding wrote:
> > On Mon, Aug 19, 2013 at 01:43:59PM -0600, Stephen Warren wrote:
> >> On 08/17/2013 05:17 AM, Thierry Reding wrote: ...
> >>> Well, the most obvious cases where early initialization is
On 08/19/2013 02:10 PM, Thierry Reding wrote:
> On Mon, Aug 19, 2013 at 01:43:59PM -0600, Stephen Warren wrote:
>> On 08/17/2013 05:17 AM, Thierry Reding wrote: ...
>>> Well, the most obvious cases where early initialization is
>>> needed are interrupt controllers and clocks.
>>
>> ... and IOMMUs,
On Mon, Aug 19, 2013 at 01:43:59PM -0600, Stephen Warren wrote:
> On 08/17/2013 05:17 AM, Thierry Reding wrote:
> ...
> > Well, the most obvious cases where early initialization is needed
> > are interrupt controllers and clocks.
>
> ... and IOMMUs, which apparently need to initialize before any d
On Mon, Aug 19, 2013 at 01:49:18PM -0600, Stephen Warren wrote:
> On 08/17/2013 04:26 AM, Tomasz Figa wrote:
> ...
> > Please correct me if I'm wrong, but to get to initcalls you need a timer.
> > However a timer driver might need interrupts (to tick) and clocks (to get
> > the frequency).
> >
>
On 08/17/2013 04:26 AM, Tomasz Figa wrote:
...
> Please correct me if I'm wrong, but to get to initcalls you need a timer.
> However a timer driver might need interrupts (to tick) and clocks (to get
> the frequency).
>
> At least this is what happens on the platforms I work with. They don't
> n
On 08/17/2013 05:17 AM, Thierry Reding wrote:
...
> Well, the most obvious cases where early initialization is needed
> are interrupt controllers and clocks.
... and IOMMUs, which apparently need to initialize before any devices
whose transactions are routed through the IOMMU, in order to set
them
On Fri, Aug 16, 2013 at 03:08:07PM -0700, Greg Kroah-Hartman wrote:
> On Fri, Aug 16, 2013 at 11:55:31PM +0200, Thierry Reding wrote:
> > > > + list_for_each_entry(private, &device_early_list, early) {
> > > > + struct device *dev = private->device;
> > > > + int e
On Fri, Aug 16, 2013 at 11:20:55PM +0100, Grant Likely wrote:
> On Fri, Aug 16, 2013 at 10:55 PM, Thierry Reding
> wrote:
> > On Fri, Aug 16, 2013 at 02:06:37PM -0700, Greg Kroah-Hartman wrote:
> >> On Fri, Aug 16, 2013 at 10:39:21PM +0200, Thierry Reding wrote:
> >> > +static DEFINE_MUTEX(device_
On Friday 16 of August 2013 23:20:55 Grant Likely wrote:
> On Fri, Aug 16, 2013 at 10:55 PM, Thierry Reding
>
> wrote:
> > On Fri, Aug 16, 2013 at 02:06:37PM -0700, Greg Kroah-Hartman wrote:
> >> On Fri, Aug 16, 2013 at 10:39:21PM +0200, Thierry Reding wrote:
> >> > +static DEFINE_MUTEX(device_ea
On Fri, Aug 16, 2013 at 11:20:55PM +0100, Grant Likely wrote:
> Also, for the devices that are created early, is it really appropriate
> to use APIs that require a struct device? I could easily argue that
> anything done at early boot should only be the bare minimum to allow
> the kernel to get to
On Fri, Aug 16, 2013 at 11:55:31PM +0200, Thierry Reding wrote:
> > > + list_for_each_entry(private, &device_early_list, early) {
> > > + struct device *dev = private->device;
> > > + int err;
> > > +
> > > + if (dev->bus == &platform_bus_type) {
> >
> > Why special case th
On Fri, Aug 16, 2013 at 10:39:21PM +0200, Thierry Reding wrote:
> +static DEFINE_MUTEX(device_early_mutex);
> +static LIST_HEAD(device_early_list);
> +static bool device_is_early = true;
> +
> +/*
> + * Keep a list of early registered devices so that they can be fully
> + * registered at a later po
On Fri, Aug 16, 2013 at 02:06:37PM -0700, Greg Kroah-Hartman wrote:
> On Fri, Aug 16, 2013 at 10:39:21PM +0200, Thierry Reding wrote:
> > +static DEFINE_MUTEX(device_early_mutex);
> > +static LIST_HEAD(device_early_list);
> > +static bool device_is_early = true;
> > +
> > +/*
> > + * Keep a list of
On Fri, Aug 16, 2013 at 10:55 PM, Thierry Reding
wrote:
> On Fri, Aug 16, 2013 at 02:06:37PM -0700, Greg Kroah-Hartman wrote:
>> On Fri, Aug 16, 2013 at 10:39:21PM +0200, Thierry Reding wrote:
>> > +static DEFINE_MUTEX(device_early_mutex);
>> > +static LIST_HEAD(device_early_list);
>> > +static bo
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