Refer to the discussion [1] when try to enable i.MX8MM PCIe support, one standalone PCIe PHY driver should be seperated from i.MX PCIe driver when enable i.MX8MM PCIe support. This patch-set adds the standalone PCIe PHY driver suport[1-5], and i.MX8MM PCIe support[6-8] to have whole view to review this patch-set. The PCIe works on i.MX8MM EVK board based the the blkctrl power driver [2] and this patch-set. And tested by Tim and Marcel on the different reference clock modes boards. [1] https://patchwork.ozlabs.org/project/linux-pci/patch/20210510141509.929120-3-l.stach@xxxxxxxxxxxxxx/ [2] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20210910202640.980366-1-l.stach@xxxxxxxxxxxxxx/ Main changes v6 --> v7: - Add "Reviewed-by: Rob Herring <robh@xxxxxxxxxx>" into #2 patches. - Regarding Vinod's review comments do the following changes. - Don't build in the PHY driver in default. - Remove the extra blank line - Correct the license tag. Main changes v5 --> v6: - Add "Reviewed-by: Rob Herring <robh@xxxxxxxxxx>" into #1 and #3 patches. - Merge Rob's review comments to the #2 patch. Main changes v4 --> v5: - Set the AUX_EN always 1b'1, thus it can fix the regression introduced in v4 series on Marcel's board. - Use the lower-case letter in the devicetreee refer to Marcel's comments. - Since the default value of the deemphasis parameters are zero, only set the deemphasis registers when the input paramters are none zero. Main changes v3 --> v4: - Update the yaml to fix syntax error, add maxitems and drop description of phy - Correct the clock name in PHY DT node. - Squash the EVK board relalted dts changes into one patch, and drop the useless dummy clock and gpio suffix in DT nodes. - Add board specific de-emphasis parameters as DT properties. Thus each board can specify its actual de-emphasis values. - Update the commit log of PHY driver. - Remove the useless codes from PCIe driver, since they are moved to PHY driver - After the discussion and verification of the CLKREQ# configurations with Tim, agree to add an optional boolean property "fsl,clkreq-unsupported", indicates the CLKREQ# signal is hooked or not in HW designs. - Add "Tested-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>" tag, since Marcel help to test the v3 patch-set. Main changes v2 --> v3: - Regarding Lucas' comments. - to have a whole view to review the patches, send out the i.MX8MM PCIe support too. - move the PHY related bits manipulations of the GPR/SRC to standalone PHY driver. - split the dts changes to SOC and board DT, and use the enum instead of raw value. - update the license of the dt-binding header file. Changes v1 --> v2: - Update the license of the dt-binding header file to make the license compatible with dts files. - Fix the dt_binding_check errors. Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml | 6 +++ Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml | 92 +++++++++++++++++++++++++++++++ arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 55 +++++++++++++++++++ arch/arm64/boot/dts/freescale/imx8mm.dtsi | 46 +++++++++++++++- drivers/pci/controller/dwc/pci-imx6.c | 83 +++++++++++++++++++++++++--- drivers/phy/freescale/Kconfig | 8 +++ drivers/phy/freescale/Makefile | 1 + drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 236 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/dt-bindings/phy/phy-imx8-pcie.h | 14 +++++ 9 files changed, 532 insertions(+), 9 deletions(-) [PATCH v7 1/8] dt-bindings: phy: phy-imx8-pcie: Add binding for the [PATCH v7 2/8] dt-bindings: phy: Add imx8 pcie phy driver support [PATCH v7 3/8] dt-bindings: imx6q-pcie: Add PHY phandles and name [PATCH v7 4/8] arm64: dts: imx8mm: Add the pcie phy support [PATCH v7 5/8] phy: freescale: pcie: Initialize the imx8 pcie [PATCH v7 6/8] arm64: dts: imx8mm: Add the pcie support [PATCH v7 7/8] arm64: dts: imx8mm-evk: Add the pcie support on imx8mm [PATCH v7 8/8] PCI: imx: Add the imx8mm pcie support
