[0/4] clk: Baikal-T1 DDR/PCIe resets and some xGMAC fixes

Message

Serge Semin March 24, 2022, 1:09 a.m. UTC

This patchset is an initial one in the series created in the framework
of my Baikal-T1 PCIe/eDMA-related work:

[1: In-progress] clk: Baikal-T1 DDR/PCIe resets and some xGMAC fixes
Link: --you are looking at it--
[2: Stalling]    PCI: dwc: Various fixes and cleanups
Link: --being submitted afterwards--
[3: Stalling]    PCI: dwc: Add dma-ranges/YAML-schema/Baikal-T1 support
Link: --being submitted afterwards--
[4: Stalling]    dmaengine: dw-edma: Add RP/EP local DMA controllers support
Link: --being submitted afterwards--

Since some of the patches in the later patchsets depend on modifications
introduced here @Bjorn could you please merge this series through your
PCIe subsystem repo? After getting all the required ack'es of course.

Short summary regarding this patchset. A few more modifications are
introduced here to finally finish the Baikal-T1 CCU unit support up and
prepare the code before adding the Baikal-T1 PCIe/xGMAC support. First of
all it turned out I specified wrong DW xGMAC PTP reference clock divider
in my initial patches. It must be 8, not 10. Secondly I was wrong to add a
joint xGMAC Ref and PTP clock instead of having them separately defined.
The SoC manual describes these clocks as separate fixed clock wrappers.
Finally in order to close the SoC clock/reset support up we need to add
the DDR and PCIe interfaces reset controls support. It's done in two
steps. First I've moved the reset-controls-related code into a dedicated
module. Then the DDR/PCIe reset-control functionality is added.

Signed-off-by: Serge Semin <[e-mail]>
Cc: Alexey Malahov <[e-mail]>
Cc: Pavel Parkhomenko <[e-mail]>
Cc: Lorenzo Pieralisi <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: "Krzysztof Wilczyński" <[e-mail]>
Cc: Thomas Bogendoerfer <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail]

Serge Semin (4):
  clk: baikal-t1: Fix invalid xGMAC PTP clock divider
  clk: baikal-t1: Define shared xGMAC ref/ptp clocks parent
  clk: baikal-t1: Move reset-controls code into a dedicated module
  clk: baikal-t1: Add DDR/PCIe directly controlled resets support

 drivers/clk/baikal-t1/Kconfig       |  12 +-
 drivers/clk/baikal-t1/Makefile      |   1 +
 drivers/clk/baikal-t1/ccu-div.c     |   1 +
 drivers/clk/baikal-t1/ccu-div.h     |   6 +
 drivers/clk/baikal-t1/ccu-rst.c     | 373 ++++++++++++++++++++++++++++
 drivers/clk/baikal-t1/ccu-rst.h     |  64 +++++
 drivers/clk/baikal-t1/clk-ccu-div.c | 102 ++------
 include/dt-bindings/reset/bt1-ccu.h |   9 +
 8 files changed, 482 insertions(+), 86 deletions(-)
 create mode 100644 drivers/clk/baikal-t1/ccu-rst.c
 create mode 100644 drivers/clk/baikal-t1/ccu-rst.h