-----Original Message-----
From: Tim Harvey <tharvey@gateworks.com>
Sent: Friday, October 29, 2021 2:17 AM
To: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>; Marcel Ziswiler
[off-list ref]; Kishon Vijay Abraham I
[off-list ref]; vkoul@kernel.org; Rob Herring [off-list ref];
galak@kernel.crashing.org; Shawn Guo [off-list ref];
linux-phy@lists.infradead.org; Device Tree Mailing List
[off-list ref]; Linux ARM Mailing List
[off-list ref]; open list
[off-list ref]; Sascha Hauer [off-list ref];
dl-linux-imx [off-list ref]
Subject: Re: [PATCH v4 0/8] add the imx8m pcie phy driver and imx8mm
pcie support

On Thu, Oct 28, 2021 at 12:52 AM Richard Zhu [off-list ref]
wrote:

quoted

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.

quoted

The PCIe works on i.MX8MM EVK board based the the blkctrl power

driver

quoted

[2] and this patch-set.

[1]

https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpa
tc

quoted

hwork.ozlabs.org%2Fproject%2Flinux-pci%2Fpatch%2F20210510141509.
929120

quoted

-3-l.stach%40pengutronix.de%2F&data=04%7C01%7Chongxing.zhu
%40nxp.c

quoted

om%7C90b27fd98a4d47a5a68c08d99a3f32e3%7C686ea1d3bc2b4c6fa92
cd99c5c3016

quoted

35%7C0%7C0%7C637710418493785262%7CUnknown%7CTWFpbGZsb3d
8eyJWIjoiMC4wLj

quoted

AwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&
amp;sdata=

quoted

K%2B5UzVRndlp9qJT9RlkQp2qzKAx%2B76xwMd51xHLEZKI%3D&re
served=0

quoted

[2]

https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpa
tc

quoted

hwork.kernel.org%2Fproject%2Flinux-arm-kernel%2Fcover%2F20210910
202640

quoted

.980366-1-l.stach%40pengutronix.de%2F&data=04%7C01%7Chon

gxing.zhu%

quoted

40nxp.com%7C90b27fd98a4d47a5a68c08d99a3f32e3%7C686ea1d3bc2b
4c6fa92cd99

quoted

c5c301635%7C0%7C0%7C637710418493795238%7CUnknown%7CTWFp
bGZsb3d8eyJWIjo

quoted

iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%
7C1000&amp

quoted

;sdata=kKpDrUNfZy0qR3QlJxW7tUgmVl8PS0WwUb4O694bOkA%3D&a

mp;reserved=0

quoted

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

quoted

  useless dummy clock and gpio suffix in DT nodes.
- Add board specific de-emphasis parameters as DT properties. Thus

each board

quoted

  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,

quoted

  agree to add an optional boolean property "fsl,clkreq-unsupported",

indicates

quoted

  the CLKREQ# signal is hooked or not in HW designs.
- Add "Tested-by: Marcel Ziswiler [off-list ref]" tag,

since

quoted

  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.

quoted

 - move the PHY related bits manipulations of the GPR/SRC to

standalone PHY driver.

quoted

 - split the dts changes to SOC and board DT, and use the enum instead

of raw value.

quoted

 - 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

+++

quoted

Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml |  95

+++++++++++++++++++++++++++++++++

quoted

arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi                |

55 +++++++++++++++++++

quoted

arch/arm64/boot/dts/freescale/imx8mm.dtsi                    |

46 +++++++++++++++-

quoted

drivers/pci/controller/dwc/pci-imx6.c                        |

73 ++++++++++++++++++++++---

quoted

drivers/phy/freescale/Kconfig                                |

9 ++++

quoted

drivers/phy/freescale/Makefile                               |

1 +

quoted

drivers/phy/freescale/phy-fsl-imx8m-pcie.c                   |

234
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++

quoted

include/dt-bindings/phy/phy-imx8-pcie.h                      |

14 +++++

quoted

9 files changed, 525 insertions(+), 8 deletions(-)

[PATCH v4 1/8] dt-bindings: phy: phy-imx8-pcie: Add binding for the
[PATCH v4 2/8] dt-bindings: phy: Add imx8 pcie phy driver support
[PATCH v4 3/8] dt-bindings: imx6q-pcie: Add PHY phandles and name
[PATCH v4 4/8] arm64: dts: imx8mm: Add the pcie phy support [PATCH

v4

quoted

5/8] phy: freescale: pcie: Initialize the imx8 pcie [PATCH v4 6/8]
arm64: dts: imx8mm: Add the pcie support [PATCH v4 7/8] arm64: dts:
imx8mm-evk: Add the pcie support on imx8mm [PATCH v4 8/8] PCI:

imx:

quoted

Add the imx8mm pcie support

Richard,

For your v4 series:

Reviewed-By: Tim Harvey <tharvey@gateworks.com>
Tested-By: Tim Harvey <tharvey@gateworks.com>

I tested this on imx8mm-venice* boards with no CLKREQ# support as well
as an imx8mm-evk board.

[Richard Zhu] Thanks a lot.

Best Regards
Richard Zhu

Thanks again for your effort on this series!

Best regards,

Tim

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