Hi, On Fri, Jan 24, 2020 at 09:02:12AM +0100, Neil Armstrong wrote: > Hi, > > On 24/01/2020 00:29, Remi Pommarel wrote: > > PCIe device probing failures have been seen on AXG platforms and were > > due to unreliable clock signal output. Setting HHI_MIPI_CNTL0[26] bit > > in MIPI's PHY registers solved the problem. This bit controls band gap > > reference. > > > > As discussed here [1] one of these shared MIPI/PCIE analog PHY register > > bits was implemented in the clock driver as CLKID_MIPI_ENABLE. This adds > > a PHY driver to control this bit instead, as well as setting the band > > gap one in order to get reliable PCIE communication. > > > > While at it add another PHY driver to control PCIE only PHY registers, > > making AXG code more similar to G12A platform thus allowing to remove > > some specific platform handling in pci-meson driver. > > > > Please note that CLKID_MIPI_ENABLE removable will be done in a different > > serie. > > > > Changes since v5: > > - Add additionalProperties in device tree binding documentation > > - Make analog PHY required > > > > Changes since v4: > > - Rename the shared MIPI/PCIe PHY to analog > > - Chain the MIPI/PCIe PHY to the PCIe one > > > > Changes since v3: > > - Go back to the shared MIPI/PCIe phy driver solution from v2 > > - Remove syscon usage > > - Add all dt-bindings documentation > > > > Changes since v2: > > - Remove shared MIPI/PCIE device driver and use syscon to access register > > in PCIE only driver instead > > - Include devicetree documentation > > > > Changes sinve v1: > > - Move HHI_MIPI_CNTL0 bit control in its own PHY driver > > - Add a PHY driver for PCIE_PHY registers > > - Modify pci-meson.c to make use of both PHYs and remove specific > > handling for AXG and G12A > > > > [1] https://lkml.org/lkml/2019/12/16/119 > > > > Remi Pommarel (7): > > dt-bindings: Add AXG PCIE PHY bindings > > dt-bindings: Add AXG shared MIPI/PCIE analog PHY bindings > > dt-bindings: PCI: meson: Update PCIE bindings documentation > > arm64: dts: meson-axg: Add PCIE PHY nodes > > phy: amlogic: Add Amlogic AXG MIPI/PCIE analog PHY Driver > > phy: amlogic: Add Amlogic AXG PCIE PHY Driver > > PCI: amlogic: Use AXG PCIE > > > > .../bindings/pci/amlogic,meson-pcie.txt | 22 +- > > .../amlogic,meson-axg-mipi-pcie-analog.yaml | 35 ++++ > > .../bindings/phy/amlogic,meson-axg-pcie.yaml | 52 +++++ > > arch/arm64/boot/dts/amlogic/meson-axg.dtsi | 16 ++ > > drivers/pci/controller/dwc/pci-meson.c | 116 ++--------- > > drivers/phy/amlogic/Kconfig | 22 ++ > > drivers/phy/amlogic/Makefile | 12 +- > > .../amlogic/phy-meson-axg-mipi-pcie-analog.c | 188 +++++++++++++++++ > > drivers/phy/amlogic/phy-meson-axg-pcie.c | 192 ++++++++++++++++++ > > 9 files changed, 543 insertions(+), 112 deletions(-) > > create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml > > create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson-axg-pcie.yaml > > create mode 100644 drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c > > create mode 100644 drivers/phy/amlogic/phy-meson-axg-pcie.c > > > > You forgot to keep the Reviewed-by/Acked-by tags from the previous reviews. > Indeed, sorry about that, I have just added them. -- Remi
