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net: dsa: qca8k: Add support for force mode for fixed link topology

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A fixed link topology is commonly used to connect this switch (on port
0 or 6) to a SoC's MAC over SGMII. When inband negotiation is not used,
the switch needs to be configured to operate in force mode. As such,
enable support for force mode.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: George Moussalem <george.moussalem@outlook.com>
Link: https://patch.msgid.link/20260605-qca8337-force-mode-v2-1-d9a6b6545bfa@outlook.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
George Moussalem 2026-06-05 12:11:29 +04:00 committed by Jakub Kicinski
parent e8b38659de
commit e0a77b1ed9
2 changed files with 17 additions and 6 deletions
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22
drivers/net/dsa/qca/qca8k-8xxx.c
View File

@ -1538,7 +1538,7 @@ static int qca8k_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
{
struct qca8k_priv *priv = pcs_to_qca8k_pcs(pcs)->priv;
int cpu_port_index, ret, port;
u32 reg, val;
u32 mask, reg, val;
port = pcs_to_qca8k_pcs(pcs)->port;
switch (port) {
@ -1611,11 +1611,21 @@ static int qca8k_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
if (priv->ports_config.sgmii_tx_clk_falling_edge)
val |= QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE;
if (val)
ret = qca8k_rmw(priv, reg,
QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE |
QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE,
val);
mask = (val) ? (QCA8K_PORT0_PAD_SGMII_RXCLK_FALLING_EDGE |
QCA8K_PORT0_PAD_SGMII_TXCLK_FALLING_EDGE) : 0;
/*
* (Un)set force mode on QCA8337 only, don't include it in the mask for
* others. It is written to the PORT0 PAD register for both port 0 and 6.
*/
if (priv->switch_id == QCA8K_ID_QCA8337) {
if (neg_mode == PHYLINK_PCS_NEG_OUTBAND)
val |= QCA8K_PORT_PAD_SGMII_FORCE_MODE;
mask |= QCA8K_PORT_PAD_SGMII_FORCE_MODE;
}
if (mask)
ret = qca8k_rmw(priv, reg, mask, val);
return 0;
}

1
drivers/net/dsa/qca/qca8k.h
View File

@ -58,6 +58,7 @@
#define QCA8K_PORT_PAD_RGMII_TX_DELAY_EN BIT(25)
#define QCA8K_PORT_PAD_RGMII_RX_DELAY_EN BIT(24)
#define QCA8K_PORT_PAD_SGMII_EN BIT(7)
#define QCA8K_PORT_PAD_SGMII_FORCE_MODE BIT(3)
#define QCA8K_REG_PWS 0x010
#define QCA8K_PWS_POWER_ON_SEL BIT(31)
/* This reg is only valid for QCA832x and toggle the package