| Message ID | 20210921202137.7092-2-ps.report@gmx.net |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v5,1/6] package/rpi-firmware: rework boot/config file handling | expand |
Peter, All, On 2021-09-21 22:21 +0200, Peter Seiderer spake thusly: > - add RTC and USB dtoverlay entries to config_cm4io.txt Why specifically the RTC and USB? And why only on the CM, and not the other boards? IIRC, dwc2 is an OTG chip, too, and it is also wired on the rpi0. Well, by experience, I know that the rpi0 *can* do USB slave/OTG. Regards, Yann E. MORIN. > Signed-off-by: Peter Seiderer <ps.report@gmx.net> > --- > Changes v4 -> v5: > - new patch > --- > board/raspberrypi/config_cm4io.txt | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/board/raspberrypi/config_cm4io.txt b/board/raspberrypi/config_cm4io.txt > index 01f60395b3..cf7e6df1a1 100644 > --- a/board/raspberrypi/config_cm4io.txt > +++ b/board/raspberrypi/config_cm4io.txt > @@ -24,3 +24,10 @@ gpu_mem_1024=100 > > # fixes rpi (3B, 3B+, 3A+, 4B and Zero W) ttyAMA0 serial console > dtoverlay=miniuart-bt > + > +# enable RTC > +dtparam=i2c_vc=on > +dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi > + > +# enable dwc2 USB controller (USB 2.0) > +dtoverlay=dwc2,dr_mode=host > -- > 2.33.0 > > _______________________________________________ > buildroot mailing list > buildroot@lists.buildroot.org > https://lists.buildroot.org/mailman/listinfo/buildroot
Hello Yann, On Sun, 17 Oct 2021 22:27:17 +0200, "Yann E. MORIN" <yann.morin.1998@free.fr> wrote: > Peter, All, > > On 2021-09-21 22:21 +0200, Peter Seiderer spake thusly: > > - add RTC and USB dtoverlay entries to config_cm4io.txt > > Why specifically the RTC and USB? And why only on the CM, and not the > other boards? The config is not for the CM4 standalone, but specific to the CM4 IO Board, equipped (as the only RPi original one) with an RTC chip.... > > IIRC, dwc2 is an OTG chip, too, and it is also wired on the rpi0. Well, > by experience, I know that the rpi0 *can* do USB slave/OTG. And as far as I know the USB is enabled with all RPi's with exception of the CM4: 'The USB interface is disabled to save power by default on the CM4' (see [1] page 5) According to [2]: Name: dwc-otg Info: Selects the dwc_otg USB controller driver which has fiq support. This is the default on all except the Pi Zero which defaults to dwc2. Load: dtoverlay=dwc-otg Params: <None> Name: dwc2 Info: Selects the dwc2 USB controller driver Load: dtoverlay=dwc2,<param>=<val> Params: dr_mode Dual role mode: "host", "peripheral" or "otg" g-rx-fifo-size Size of rx fifo size in gadget mode g-np-tx-fifo-size Size of non-periodic tx fifo size in gadget mode Would interpret 'defaults to dwc2' on Pi Zero as enabled by default... Regards, Peter [1] https://datasheets.raspberrypi.com/cm4io/cm4io-datasheet.pdf [2] https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README > > > Regards, > Yann E. MORIN. > > > Signed-off-by: Peter Seiderer <ps.report@gmx.net> > > --- > > Changes v4 -> v5: > > - new patch > > --- > > board/raspberrypi/config_cm4io.txt | 7 +++++++ > > 1 file changed, 7 insertions(+) > > > > diff --git a/board/raspberrypi/config_cm4io.txt b/board/raspberrypi/config_cm4io.txt > > index 01f60395b3..cf7e6df1a1 100644 > > --- a/board/raspberrypi/config_cm4io.txt > > +++ b/board/raspberrypi/config_cm4io.txt > > @@ -24,3 +24,10 @@ gpu_mem_1024=100 > > > > # fixes rpi (3B, 3B+, 3A+, 4B and Zero W) ttyAMA0 serial console > > dtoverlay=miniuart-bt > > + > > +# enable RTC > > +dtparam=i2c_vc=on > > +dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi > > + > > +# enable dwc2 USB controller (USB 2.0) > > +dtoverlay=dwc2,dr_mode=host > > -- > > 2.33.0 > > > > _______________________________________________ > > buildroot mailing list > > buildroot@lists.buildroot.org > > https://lists.buildroot.org/mailman/listinfo/buildroot >
On 2021-10-17 22:54 +0200, Peter Seiderer spake thusly: > On Sun, 17 Oct 2021 22:27:17 +0200, "Yann E. MORIN" <yann.morin.1998@free.fr> wrote: > > On 2021-09-21 22:21 +0200, Peter Seiderer spake thusly: > > > - add RTC and USB dtoverlay entries to config_cm4io.txt > > Why specifically the RTC and USB? And why only on the CM, and not the > > other boards? > The config is not for the CM4 standalone, but specific to the > CM4 IO Board, equipped (as the only RPi original one) with an > RTC chip.... Ah, OK, that makes sense, then. > > IIRC, dwc2 is an OTG chip, too, and it is also wired on the rpi0. Well, > > by experience, I know that the rpi0 *can* do USB slave/OTG. > And as far as I know the USB is enabled with all RPi's with > exception of the CM4: 'The USB interface is disabled to save power by > default on the CM4' (see [1] page 5) > > According to [2]: > > Name: dwc-otg > Info: Selects the dwc_otg USB controller driver which has fiq support. This > is the default on all except the Pi Zero which defaults to dwc2. > Load: dtoverlay=dwc-otg > Params: <None> > > > Name: dwc2 > Info: Selects the dwc2 USB controller driver > Load: dtoverlay=dwc2,<param>=<val> > Params: dr_mode Dual role mode: "host", "peripheral" or "otg" > > g-rx-fifo-size Size of rx fifo size in gadget mode > > g-np-tx-fifo-size Size of non-periodic tx fifo size in gadget > mode > Would interpret 'defaults to dwc2' on Pi Zero as enabled by default... Yes, it is enabled by default, as a host-only controller, not OTG, which has to be explictly requested. Regards, Yann E. MORIN.
On Tue, 21 Sep 2021 22:21:33 +0200 Peter Seiderer <ps.report@gmx.net> wrote: > - add RTC and USB dtoverlay entries to config_cm4io.txt > > Signed-off-by: Peter Seiderer <ps.report@gmx.net> > --- > Changes v4 -> v5: > - new patch > --- > board/raspberrypi/config_cm4io.txt | 7 +++++++ > 1 file changed, 7 insertions(+) I have applied to master, after extending the commit log with more details that explain the change. Thanks! Thomas
diff --git a/board/raspberrypi/config_cm4io.txt b/board/raspberrypi/config_cm4io.txt index 01f60395b3..cf7e6df1a1 100644 --- a/board/raspberrypi/config_cm4io.txt +++ b/board/raspberrypi/config_cm4io.txt @@ -24,3 +24,10 @@ gpu_mem_1024=100 # fixes rpi (3B, 3B+, 3A+, 4B and Zero W) ttyAMA0 serial console dtoverlay=miniuart-bt + +# enable RTC +dtparam=i2c_vc=on +dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi + +# enable dwc2 USB controller (USB 2.0) +dtoverlay=dwc2,dr_mode=host
- add RTC and USB dtoverlay entries to config_cm4io.txt Signed-off-by: Peter Seiderer <ps.report@gmx.net> --- Changes v4 -> v5: - new patch --- board/raspberrypi/config_cm4io.txt | 7 +++++++ 1 file changed, 7 insertions(+)