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Fri, 6 Sep 2024 05:40:52 -0400 (EDT) From: =?utf-8?q?Niklas_S=C3=B6derlund?= To: Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yoshihiro Shimoda , netdev@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, =?utf-8?q?Niklas_S=C3=B6derlund?= Subject: [net-next 0/2] net: phy: Fallback to C22 for PHY register read/write Date: Fri, 6 Sep 2024 11:39:53 +0200 Message-ID: <20240906093955.3083245-1-niklas.soderlund+renesas@ragnatech.se> X-Mailer: git-send-email 2.46.0 Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hello, This series extends the behavior of the SIOCGMIIREG and SIOCSMIIREG IOCTLs to use the convenience functions mmd_phy_read() and mmd_phy_write() for C45 access. This brings the benefit of the core falling back to indirect C22 access of the underlying driver do not itself provide C45 read/write capability. Patch 1/2 exposes the read/write functions making them available to the IOCTL callback. While patch 2/2 changes the IOCTL callback to make use of them. Without this change using tools like phytool to read/write registers on a C45 only PHY using a C22 only driver fails as the IOCTL callback don't know how to talk C45 on the mdio bus. Niklas Söderlund (2): net: phy: Expose the direct mdiobus access functions net: phy: Fallback to C22 access if needed in phy_mii_ioctl() drivers/net/phy/phy-core.c | 10 ++++++---- drivers/net/phy/phy.c | 18 ++++++++++++------ include/linux/phy.h | 12 ++++++++++++ 3 files changed, 30 insertions(+), 10 deletions(-)