[PATCH v5 0/2] Add motorcomm phy pad-driver-strength-cfg support

From: Samin Guo <samin.guo@starfivetech.com>
To: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<netdev@vger.kernel.org>, Peter Geis <pgwipeout@gmail.com>,
	Frank <Frank.Sae@motor-comm.com>
Cc: "David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Rob Herring <robh+dt@kernel.org>, Conor Dooley <conor@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Andrew Lunn <andrew@lunn.ch>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	"Russell King" <linux@armlinux.org.uk>,
	Samin Guo <samin.guo@starfivetech.com>,
	"Yanhong Wang" <yanhong.wang@starfivetech.com>
Subject: [PATCH v5 0/2] Add motorcomm phy pad-driver-strength-cfg support
Date: Thu, 20 Jul 2023 19:15:07 +0800	[thread overview]
Message-ID: <20230720111509.21843-1-samin.guo@starfivetech.com> (raw)

The motorcomm phy (YT8531) supports the ability to adjust the drive
strength of the rx_clk/rx_data, and the default strength may not be
suitable for all boards. So add configurable options to better match
the boards.(e.g. StarFive VisionFive 2)

The first patch adds a description of dt-bingding, and the second patch adds
YT8531's parsing and settings for pad-driver-strength-cfg.

Changes since v4:
Patch 1:
- Removed register-related DS(3b) values and added vol descriptions (by Andrew Lunn)
- Dropped the type and added '-microamp' suffix. (by Rob Herring)
Patch 2:
- Return -EINVAL if the value in DT but it is invalid (by Andrew Lunn)

Changes since v3:
Patch 1:
- Used current values instead of register values
- Added units and numerical descriptions of driver-strength
Patch 2:
- Added a lookup table to listing the valid values in the schema (by Andrew Lunn)

Changes since v2:
Patch 2:
- Readjusted the order of YT8531_RGMII_xxx to below YTPHY_PAD_DRIVE_STRENGTH_REG (by Frank Sae)
- Reversed Christmas tree, sort these longest first, shortest last (by Andrew Lunn)
- Rebased on tag v6.4

Changes since v1:
Patch 1:
- Renamed "rx-xxx-driver-strength" to "motorcomm,rx-xxx-driver-strength" (by Frank Sae)
Patch 2:
- Added default values for rxc/rxd driver strength (by Frank Sea/Andrew Lunn)
- Added range checking when val is in DT (by Frank Sea/Andrew Lunn)

Previous versions:
v1 - https://patchwork.kernel.org/project/netdevbpf/cover/20230426063541.15378-1-samin.guo@starfivetech.com
v2 - https://patchwork.kernel.org/project/netdevbpf/cover/20230505090558.2355-1-samin.guo@starfivetech.com
v3 - https://patchwork.kernel.org/project/netdevbpf/cover/20230526090502.29835-1-samin.guo@starfivetech.com
v4 - https://patchwork.kernel.org/project/netdevbpf/cover/20230714101406.17686-1-samin.guo@starfivetech.com

Samin Guo (2):
  dt-bindings: net: motorcomm: Add pad driver strength cfg
  net: phy: motorcomm: Add pad drive strength cfg support

 .../bindings/net/motorcomm,yt8xxx.yaml        |  34 +++++
 drivers/net/phy/motorcomm.c                   | 118 ++++++++++++++++++
 2 files changed, 152 insertions(+)

base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
-- 
2.17.1