u-boot.git/drivers/net, branch v2025.01-rc1

Merge a patch series to improve dc2114x support

2024-10-27T23:04:02Z

This patch series by Hanyuan Zhao provides a number of improvements to the dc2114x driver. Link: https://lore.kernel.org/r/tencent_BD4B002FC63A5F77969D9BD1FFF125371C08@qq.com

Merge patch series "net: ksz9477: add support for KSZ GbE switches using SPI bus"

2024-10-27T23:03:40Z

Romain Naour says: We are using a custom board where an ethernet switch device KSZ9896 is available. This family of devices can use several types of serial bus as management interface: mdio, i2c or SPI. Due to board design constraints and because we initially planned to use this device only from Linux, the SPI bus was used. Luckily we are using a recent enough u-boot release where KSZ9477 driver is available... but only for the i2c interface. Indeed, unlike the kernel driver, the KSZ9477 driver doesn't use the regmap API to access the underlying bus since the regmap API is limited to direct memory access [1]. Until regmap API with bus support is available in U-boot, we introduced struct ksz_phy_ops to store low-level ksz bus operations (I2C or SPI). This series has been tested on the current master branch (after v2024.10 release). [1] https://source.denx.de/u-boot/u-boot/-/blob/v2024.10-rc5/drivers/core/Kconfig?ref_type=tags#L188 Link: https://lore.kernel.org/r/20241008075435.1572727-1-romain.naour@smile.fr

Merge patch series "Add driver for Motorcomm YT8821 2.5G ethernet phy"

2024-10-27T23:03:40Z

Frank Sae says: YT8531 as Gigabit transceiver uses bit15:14(bit9 reserved default 0) as phy speed mask, YT8821 as 2.5 Gigabit transceiver uses bit9 bit15:14 as phy speed mask. Be compatible to YT8821, reform phy speed mask and phy speed macro. Based on update above, add YT8821 2.5G phy driver. Link: https://lore.kernel.org/r/20240912120225.28884-1-Frank.Sae@motor-comm.com

net: recv(): return -EAGAIN instead of 0 when no cleanup is expected

2024-10-27T23:03:40Z

Some drivers do not behave properly when free_pkt() is called with a length of zero. It is an issue I observed when developing the lwIP series [1] (see "QEMU CI tests for r2dplus_i82557c, r2dplus_rtl8139" in the change log) and which I fixed incorrectly by not calling free_pkt() when recv() returns 0. That turned out to be wrong for two reasons: 1. The DM documentation [2] clearly requires it: "The **recv** function polls for availability of a new packet. [...] If there is an error [...], return 0 if you require the packet to be cleaned up normally, or a negative error code otherwise (cleanup not necessary or already done). If **free_pkt** is defined, U-Boot will call it after a received packet has been processed [...]. free_pkt() will be called after recv(), for the same packet [...]" 2. The imx8mp_evk platform will fail with OOM errors if free_pkt() is not called after recv() returns 0: u-boot=> tftp 192.168.0.16:50M Using ethernet@30be0000 device TFTP from server 192.168.0.16; our IP address is 192.168.0.48 Filename '50M'. Load address: 0x40480000 Loading: #######################fecmxc_recv: error allocating packetp fecmxc_recv: error allocating packetp fecmxc_recv: error allocating packetp ... Therefore, make recv() return -EAGAIN instead of 0 when no packet is available and the driver doesn't expect free_pkt() to be called subsequently. [1] https://lists.denx.de/pipermail/u-boot/2024-August/562861.html [2] doc/develop/driver-model/ethernet.rst Signed-off-by: Jerome Forissier Reviewed-by: Simon Glass

net: ksz9477: add support for KSZ GbE switches using SPI bus

2024-10-27T16:19:44Z

The Microchip KSZ Gigabit Ethernet Switches support SGMII/RGMII/MII/RMII with register access via SPI, I2C, or MDIO. Since this driver is now able to check the underlying bus type, handle the case when the SPI bus is used. The SPI bus is only used for 8/16/32 wide access of registers. Reword Kconfig option to include SPI bus support. Signed-off-by: Romain Naour

net: ksz9477: prepare ksz9477 without I2C support

2024-10-27T16:19:44Z

With the upcoming ksz9477 SPI support added, the I2C support will be optional. Either the I2C or the SPI bus will be used. For now, DM_I2C is still mandatory. Signed-off-by: Romain Naour

net: ksz9477: rename ksz_i2c_probe() to ksz_probe()

2024-10-27T16:19:44Z

In order to support management bus other than the I2C, rename ksz_i2c_probe() to ksz_probe() since this function is no longer specific to the I2C bus. Signed-off-by: Romain Naour

net: ksz9477: store ksz bus operations functions

2024-10-27T16:19:44Z

The ksz9477 Linux kernel driver is based on regmap API to seamlessly communicate to switch devices connected via different buses like SPI or I2C. The current regmap implementation in U-Boot only supports memory-mapped registers access [1]. Until regmap API with bus support is available in U-boot, introduce struct ksz_phy_ops to store low-level ksz bus operations (I2C for now). [1] https://lists.denx.de/pipermail/u-boot/2018-May/329392.html Signed-off-by: Romain Naour

net: ksz9477: set i2c bus offset length only when needed

2024-10-27T16:19:44Z

In order to add ksz9477 SPI bus support, check parent bus is an I2C bus before calling i2c_set_offset_len(). Doing so, ksz_i2c_probe() will now return an error (-EINVAL) if the parent bus is not the one expected by the ksz-switch u-boot driver. Indeed, the DSA KSZ devicetree binding doesn't specify anything about the underlying bus between the SoC and the DSA switch, so the same "compatible" string can be used wathever the management interface used (SPI or I2C). The ksz-switch u-boot driver currently only support I2C interface but will match a compatible "microchip,ksz9xxx" located under under an SPI bus node. Signed-off-by: Romain Naour

net: ksz9477: rename udevice_id tab to ksz_ids

2024-10-27T16:19:44Z

The DSA KSZ devicetree binding doesn't specify anything about the underlying bus between the SoC and the DSA switch, so the same "compatible" string can be used wathever the management interface used. The driver must be able to access the underlying bus without any help from the compatible string (like for TPM2 TIS devices). So, rename udevice_id tab to ksz_ids since it's not specific to i2c bus. Signed-off-by: Romain Naour