Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> writes:
> This patch makes it possible to set the chipidea udc
> into full-speed only mode. It can be set by the oftree
> property "force-full-speed".
>
> Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
> ---
> drivers/usb/chipidea/bits.h | 1 +
> drivers/usb/chipidea/core.c | 5 +++++
> include/linux/usb/chipidea.h | 1 +
> 3 files changed, 7 insertions(+)
>
> diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h
> index 3cded5f..85b6b09 100644
> --- a/drivers/usb/chipidea/bits.h
> +++ b/drivers/usb/chipidea/bits.h
> @@ -51,6 +51,7 @@
> #define PORTSC_PTS (BIT(31) | BIT(30))
> #define PORTSC_PTW BIT(28)
> #define PORTSC_STS BIT(29)
> +#define PORTSC_PFSC BIT(24)
Same for this one, it's in DEVLC in my spec.
>
> /* DEVLC */
> #define DEVLC_PSPD (0x03UL << 25)
> diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> index 7e80f1b..bc99cea 100644
> --- a/drivers/usb/chipidea/core.c
> +++ b/drivers/usb/chipidea/core.c
> @@ -230,6 +230,9 @@ void hw_portsc_configure(struct ci13xxx *ci)
> hw_write(ci, OP_PORTSC, PORTSC_PTS, 0x3 << ffs_nr(PORTSC_PTS));
> hw_write(ci, OP_PORTSC, PORTSC_STS, 0x1 << ffs_nr(PORTSC_STS));
> }
> +
> + if (ci->platdata->flags & CI13XXX_PORTSC_PFSC)
> + hw_write(ci, OP_PORTSC, PORTSC_PFSC, 0x1 << ffs_nr(PORTSC_PFSC));
> }
>
> /**
> @@ -566,6 +569,8 @@ void ci13xxx_get_dr_flags(struct device_node *of_node, struct ci13xxx_platform_d
> pr_err("no phy interface defined\n");
> }
>
> + if (of_find_property(of_node, "force-full-speed", NULL))
> + pdata->flags |= CI13XXX_PORTSC_PFSC;
> }
> EXPORT_SYMBOL_GPL(ci13xxx_get_dr_flags);
>
> diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
> index cafca23..9ffe105 100644
> --- a/include/linux/usb/chipidea.h
> +++ b/include/linux/usb/chipidea.h
> @@ -26,6 +26,7 @@ struct ci13xxx_platform_data {
> #define CI13XXX_PORTSC_PTS_UTMI BIT(8)
> #define CI13XXX_PORTSC_PTS_ULPI BIT(9)
> #define CI13XXX_PORTSC_PTS_FSLS BIT(10)
> +#define CI13XXX_PORTSC_PFSC BIT(11)
Btw, these can be more descriptive and don't need _PORTSC_ prefix, like
"CI13XXX_FORCE_FULLSPEED".
Regards,
--
Alex
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