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[v2,0/2] phy: Add support for the HDMI TX PHY on Meson8/8b/8m2

Message ID 20210629182047.893415-1-martin.blumenstingl@googlemail.com (mailing list archive)
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Series phy: Add support for the HDMI TX PHY on Meson8/8b/8m2 | expand

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Martin Blumenstingl June 29, 2021, 6:20 p.m. UTC 
Amlogic Meson8/8b/8m2 SoCs embed a HDMI TX PHY. Unfortunately there is
no (public) documentation for this hardware. The best thing we have is
the 3.10 vendor kernel, which unfortunately doesn't document most
register bits (only a few are named there, the rest is all magic
numbers).
It is possible that this is a TranSwitch HDMI TX PHY based core, but
this is pure speculation.

Adding a driver for the HDMI TX PHY gets us one step closer to video
output on these older SoCs.


Changes since v1 at [0]:
- add a reg property to the dt-bindings
- parse the reg property (register offset) in the driver
- update copyright year to 2021 (spotted by Vinod, thanks!)
- drop "default ARCH_MESON" from the Kconfig entry


[0] https://patchwork.kernel.org/project/linux-amlogic/cover/20210604190338.2248295-1-martin.blumenstingl@googlemail.com/


Martin Blumenstingl (2):
  dt-bindings: phy: Add the Amlogic Meson8 HDMI TX PHY bindings
  phy: amlogic: Add a new driver for the HDMI TX PHY on Meson8/8b/8m2

 .../phy/amlogic,meson8-hdmi-tx-phy.yaml       |  55 ++++++
 drivers/phy/amlogic/Kconfig                   |  10 ++
 drivers/phy/amlogic/Makefile                  |   1 +
 drivers/phy/amlogic/phy-meson8-hdmi-tx.c      | 162 ++++++++++++++++++
 4 files changed, 228 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
 create mode 100644 drivers/phy/amlogic/phy-meson8-hdmi-tx.c