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[Qemu-devel] [PATCH v6 0/9] Clock framework API
From: |
Damien Hedde |
Subject: |
[Qemu-devel] [PATCH v6 0/9] Clock framework API |
Date: |
Wed, 4 Sep 2019 14:55:22 +0200 |
This series aims to add a way to model clock distribution in qemu. This allows
to model the clock tree of a platform allowing us to inspect clock
configuration and detect problems such as disabled clock or bad configured
pll.
The added clock api is very similar the the gpio api for devices. We can add
input and output and connect them together.
Very few changes since v5 in the core patches: we were waiting for multi phase
ability to allow proper initialization of the clock tree. So this is almost a
simple rebase on top of the current "Multi-phase reset mechanism" series.
Based-on: <address@hidden>
Changes since v5:
- drop the "-port" in file names
- new patch 2, extracted from patch 1 (to fix some problem with linux-user
builds)
- patch 3, minor modification to better match gpios api and allow non
device-related clock
(I've dropped the reviewed-by, see the patch message for the details of what
has changed).
- patch 6, Philippe's comments and various improvement
- patches 7/8/9, multi-phase reset addition and scope reduced to uart ref
clocks
The patches are organised as follows:
+ Patches 1 to 5 adds the clock support in qemu (1, 4 and 5 are already
reviewed and
also a big part of the 3)
+ Patch 6 add some documentation in docs/devel
+ Patches 7 to 9 adds the uart's clocks to the xilinx_zynq platform as an
example for this framework. It updates the zynq's slcr clock controller, the
cadence_uart device, and the zynq toplevel platform.
I've tested this patchset on the xilinx-zynq-a9 machine with the buildroot's
zynq_zc706_defconfig which package the Xilinx's Linux.
Clocks are correctly updated and we ends up with a configured baudrate of 115601
on the console uart (for a theoretical 115200) which is nice. "cadence_uart*"
and
"clock*" traces can be enabled to see what's going on in this platform.
Any comments and suggestion are welcomed.
Thanks to the Xilinx QEMU team who sponsored this development.
Damien Hedde (9):
hw/core/clock: introduce clock objects
hw/core/clock-vmstate: define a vmstate entry for clock state
qdev: add clock input&output support to devices.
qdev-monitor: print the device's clock with info qtree
qdev-clock: introduce an init array to ease the device construction
docs/clocks: add device's clock documentation
hw/misc/zynq_slcr: add clock generation for uarts
hw/char/cadence_uart: add clock support
hw/arm/xilinx_zynq: connect uart clocks to slcr
Makefile.objs | 1 +
docs/devel/clock.txt | 246 +++++++++++++++++++++++++++++++++
hw/arm/xilinx_zynq.c | 64 +++++++--
hw/char/cadence_uart.c | 85 ++++++++++--
hw/char/trace-events | 3 +
hw/core/Makefile.objs | 4 +-
hw/core/clock-vmstate.c | 25 ++++
hw/core/clock.c | 144 +++++++++++++++++++
hw/core/qdev-clock.c | 181 ++++++++++++++++++++++++
hw/core/qdev.c | 32 +++++
hw/core/trace-events | 6 +
hw/misc/zynq_slcr.c | 145 ++++++++++++++++++-
include/hw/char/cadence_uart.h | 1 +
include/hw/clock.h | 133 ++++++++++++++++++
include/hw/qdev-clock.h | 134 ++++++++++++++++++
include/hw/qdev-core.h | 14 ++
qdev-monitor.c | 13 ++
tests/Makefile.include | 1 +
18 files changed, 1210 insertions(+), 22 deletions(-)
create mode 100644 docs/devel/clock.txt
create mode 100644 hw/core/clock-vmstate.c
create mode 100644 hw/core/clock.c
create mode 100644 hw/core/qdev-clock.c
create mode 100644 include/hw/clock.h
create mode 100644 include/hw/qdev-clock.h
--
2.22.0
- [Qemu-devel] [PATCH v6 9/9] hw/arm/xilinx_zynq: connect uart clocks to slcr, (continued)
- [Qemu-devel] [PATCH v6 9/9] hw/arm/xilinx_zynq: connect uart clocks to slcr, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 2/9] hw/core/clock-vmstate: define a vmstate entry for clock state, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 8/9] hw/char/cadence_uart: add clock support, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 3/9] qdev: add clock input&output support to devices., damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 7/9] hw/misc/zynq_slcr: add clock generation for uarts, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 4/9] qdev-monitor: print the device's clock with info qtree, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 5/9] qdev-clock: introduce an init array to ease the device construction, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 6/9] docs/clocks: add device's clock documentation, damien . hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 1/9] hw/core/clock: introduce clock objects, damien . hedde, 2019/09/04
- Re: [Qemu-devel] [PATCH v6 0/9] Clock framework API, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 0/9] Clock framework API,
Damien Hedde <=
- [Qemu-devel] [PATCH v6 2/9] hw/core/clock-vmstate: define a vmstate entry for clock state, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 1/9] hw/core/clock: introduce clock objects, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 4/9] qdev-monitor: print the device's clock with info qtree, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 5/9] qdev-clock: introduce an init array to ease the device construction, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 3/9] qdev: add clock input&output support to devices., Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 9/9] hw/arm/xilinx_zynq: connect uart clocks to slcr, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 8/9] hw/char/cadence_uart: add clock support, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 7/9] hw/misc/zynq_slcr: add clock generation for uarts, Damien Hedde, 2019/09/04
- [Qemu-devel] [PATCH v6 6/9] docs/clocks: add device's clock documentation, Damien Hedde, 2019/09/04