From 006983e59755ea774c52468e9c13d360794be81e Mon Sep 17 00:00:00 2001 From: Tristram Ha Date: Thu, 24 Jul 2025 17:17:52 -0700 Subject: [PATCH] net: dsa: microchip: Setup fiber ports for KSZ8463 The fiber ports in KSZ8463 cannot be detected internally, so it requires specifying that condition in the device tree. Like the one used in Micrel PHY the port link can only be read and there is no write to the PHY. The driver programs registers to operate fiber ports correctly. Signed-off-by: Tristram Ha Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/20250725001753.6330-6-Tristram.Ha@microchip.com Signed-off-by: Jakub Kicinski --- drivers/net/dsa/microchip/ksz8.c | 16 ++++++++++++++++ drivers/net/dsa/microchip/ksz_common.c | 3 +++ 2 files changed, 19 insertions(+) diff --git a/drivers/net/dsa/microchip/ksz8.c b/drivers/net/dsa/microchip/ksz8.c index 55c1460b8b2e..62224426a9bd 100644 --- a/drivers/net/dsa/microchip/ksz8.c +++ b/drivers/net/dsa/microchip/ksz8.c @@ -1714,6 +1714,7 @@ void ksz8_config_cpu_port(struct dsa_switch *ds) const u32 *masks; const u16 *regs; u8 remote; + u8 fiber_ports = 0; int i; masks = dev->info->masks; @@ -1744,6 +1745,21 @@ void ksz8_config_cpu_port(struct dsa_switch *ds) else ksz_port_cfg(dev, i, regs[P_STP_CTRL], PORT_FORCE_FLOW_CTRL, false); + if (p->fiber) + fiber_ports |= (1 << i); + } + if (ksz_is_ksz8463(dev)) { + /* Setup fiber ports. */ + if (fiber_ports) { + fiber_ports &= 3; + regmap_update_bits(ksz_regmap_16(dev), + KSZ8463_REG_CFG_CTRL, + fiber_ports << PORT_COPPER_MODE_S, + 0); + regmap_update_bits(ksz_regmap_16(dev), + KSZ8463_REG_DSP_CTRL_6, + COPPER_RECEIVE_ADJUSTMENT, 0); + } } } diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index e47c4a5aad6f..7292bfe2f7ca 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -5439,6 +5439,9 @@ int ksz_switch_register(struct ksz_device *dev) &dev->ports[port_num].interface); ksz_parse_rgmii_delay(dev, port_num, port); + dev->ports[port_num].fiber = + of_property_read_bool(port, + "micrel,fiber-mode"); } of_node_put(ports); } -- 2.47.2