On Thu, Sep 03, 2015 at 02:33:22PM -0700, Stephen Boyd wrote:
> On 07/20, Andy Gross wrote:
> > This patch creates a platform driver for the SCM so that we can adequately
> > manage resources. This removes clients having to carry the necessary
> > clocks to use the SCM resources.
> >
> > Signed-off-by: Andy Gross <agross@xxxxxxxxxxxxxx>
> > ---
>
> It would be nice if we could use this platform device for doing
> the DMAish memory allocations that we do in this driver too. I
> guess one complication there is that we would need to allocate
> memory with the DMA APIs before CPUs are brought up
> (early_initcall level).
Yeah that's one thing we could do but we'd have to defer the memory stuff until
it's used the first time (specific calls require it).
>
> > diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> > index 45c008d..5dd0514 100644
> > --- a/drivers/firmware/qcom_scm.c
> > +++ b/drivers/firmware/qcom_scm.c
> > @@ -15,14 +15,57 @@
> > * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> > * 02110-1301, USA.
> > */
> > -
> > +#include <linux/platform_device.h>
> > +#include <linux/module.h>
> > +#include <linux/platform_device.h>
>
> This include is here twice.
>
> > #include <linux/cpumask.h>
> > #include <linux/export.h>
> > #include <linux/types.h>
> > #include <linux/qcom_scm.h>
> > +#include <linux/of.h>
> > +#include <linux/clk.h>
> >
> [...]
> > +
> > +/**
> > + * qcom_scm_is_available() - Checks if SCM is available
> > + */
> > +bool qcom_scm_is_available(void)
> > +{
> > + return !!__scm;
> > +}
> > +EXPORT_SYMBOL(qcom_scm_is_available);
> > +
> > +static int qcom_scm_remove(struct platform_device *pdev)
> > +{
> > + __scm = NULL;
> > +
> > + return 0;
> > +}
>
> Maybe we just shouldn't allow this? The firmware isn't going
> anywhere at runtime, and this driver is currently marked as
> bool in the Kconfig.
Fair enough.
>
> > +
> > +static const struct of_device_id qcom_scm_dt_match[] = {
> > + { .compatible = "qcom,scm",},
> > + {},
> > +};
> > +
> > +MODULE_DEVICE_TABLE(of, qcom_scm_dt_match);
> > +
> > +static struct platform_driver qcom_scm_driver = {
> > + .driver = {
> > + .name = "scm",
>
> Maybe 'qcom_scm' ?
yeah i should have used that.
>
> > + .of_match_table = qcom_scm_dt_match,
> > + },
> > + .probe = qcom_scm_probe,
> > + .remove = qcom_scm_remove,
> > +};
> > +
> > +module_platform_driver(qcom_scm_driver);
>
> Isn't there some sort of builtin_platform_driver() macro for
> builtin modules?
I'll take a look and convert.
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