From: David Yang <mmyangfl@gmail.com>
To: netdev@vger.kernel.org
Cc: David Yang <mmyangfl@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Russell King <linux@armlinux.org.uk>,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next 6/7] net: dsa: motorcomm: Split MDIO bus module
Date: Thu, 10 Sep 2026 03:05:34 +0800 [thread overview]
Message-ID: <20260909190541.466476-7-mmyangfl@gmail.com> (raw)
In-Reply-To: <20260909190541.466476-1-mmyangfl@gmail.com>
Split it in order to be used in other modules.
Signed-off-by: David Yang <mmyangfl@gmail.com>
---
drivers/net/dsa/motorcomm/Makefile | 1 +
drivers/net/dsa/motorcomm/chip.c | 269 +-------------------------
drivers/net/dsa/motorcomm/chip.h | 21 --
drivers/net/dsa/motorcomm/mdio_bus.c | 278 +++++++++++++++++++++++++++
drivers/net/dsa/motorcomm/mdio_bus.h | 37 ++++
5 files changed, 317 insertions(+), 289 deletions(-)
create mode 100644 drivers/net/dsa/motorcomm/mdio_bus.c
create mode 100644 drivers/net/dsa/motorcomm/mdio_bus.h
diff --git a/drivers/net/dsa/motorcomm/Makefile b/drivers/net/dsa/motorcomm/Makefile
index aeb12cb91f93..f7cce7eabbb8 100644
--- a/drivers/net/dsa/motorcomm/Makefile
+++ b/drivers/net/dsa/motorcomm/Makefile
@@ -2,4 +2,5 @@
obj-$(CONFIG_NET_DSA_YT921X) += yt921x.o
yt921x-objs := chip.o
yt921x-$(CONFIG_NET_DSA_YT921X_LEDS) += leds.o
+yt921x-objs += mdio_bus.o
yt921x-objs += smi.o
diff --git a/drivers/net/dsa/motorcomm/chip.c b/drivers/net/dsa/motorcomm/chip.c
index beeb08f2b000..85a31389050b 100644
--- a/drivers/net/dsa/motorcomm/chip.c
+++ b/drivers/net/dsa/motorcomm/chip.c
@@ -27,6 +27,7 @@
#include "chip.h"
#include "leds.h"
+#include "mdio_bus.h"
#include "smi.h"
struct yt921x_mib_desc {
@@ -271,274 +272,6 @@ static const struct yt921x_reg_ops yt921x_reg_ops_mdio = {
/* TODO: SPI/I2C */
-static int yt921x_intif_wait(struct yt921x_priv *priv)
-{
- u32 val = 0;
-
- return yt921x_reg_wait(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START,
- &val);
-}
-
-static int
-yt921x_intif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp)
-{
- struct device *dev = to_device(priv);
- u32 mask;
- u32 ctrl;
- u32 val;
- int res;
-
- res = yt921x_intif_wait(priv);
- if (res)
- return res;
-
- mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
- YT921X_MBUS_CTRL_OP_M;
- ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
- YT921X_MBUS_CTRL_READ;
- res = yt921x_reg_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
- if (res)
- return res;
- res = yt921x_reg_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
- if (res)
- return res;
-
- res = yt921x_intif_wait(priv);
- if (res)
- return res;
- res = yt921x_reg_read(priv, YT921X_INT_MBUS_DIN, &val);
- if (res)
- return res;
-
- if ((u16)val != val)
- dev_info(dev,
- "%s: port %d, reg 0x%x: Expected u16, got 0x%08x\n",
- __func__, port, reg, val);
- *valp = (u16)val;
- return 0;
-}
-
-static int
-yt921x_intif_write(struct yt921x_priv *priv, int port, int reg, u16 val)
-{
- u32 mask;
- u32 ctrl;
- int res;
-
- res = yt921x_intif_wait(priv);
- if (res)
- return res;
-
- mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
- YT921X_MBUS_CTRL_OP_M;
- ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
- YT921X_MBUS_CTRL_WRITE;
- res = yt921x_reg_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
- if (res)
- return res;
- res = yt921x_reg_write(priv, YT921X_INT_MBUS_DOUT, val);
- if (res)
- return res;
- res = yt921x_reg_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
- if (res)
- return res;
-
- return yt921x_intif_wait(priv);
-}
-
-static int yt921x_mbus_int_read(struct mii_bus *mbus, int port, int reg)
-{
- struct yt921x_priv *priv = mbus->priv;
- u16 val;
- int res;
-
- if (port >= YT921X_PORT_NUM)
- return U16_MAX;
-
- mutex_lock(&priv->reg_lock);
- res = yt921x_intif_read(priv, port, reg, &val);
- mutex_unlock(&priv->reg_lock);
-
- if (res)
- return res;
- return val;
-}
-
-static int
-yt921x_mbus_int_write(struct mii_bus *mbus, int port, int reg, u16 data)
-{
- struct yt921x_priv *priv = mbus->priv;
- int res;
-
- if (port >= YT921X_PORT_NUM)
- return -ENODEV;
-
- mutex_lock(&priv->reg_lock);
- res = yt921x_intif_write(priv, port, reg, data);
- mutex_unlock(&priv->reg_lock);
-
- return res;
-}
-
-static int
-yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp)
-{
- struct device *dev = to_device(priv);
- struct mii_bus *mbus;
- int res;
-
- mbus = devm_mdiobus_alloc(dev);
- if (!mbus)
- return -ENOMEM;
-
- mbus->name = "YT921x internal MDIO bus";
- snprintf(mbus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
- mbus->priv = priv;
- mbus->read = yt921x_mbus_int_read;
- mbus->write = yt921x_mbus_int_write;
- mbus->parent = dev;
- mbus->phy_mask = (u32)~GENMASK(YT921X_PORT_NUM - 1, 0);
-
- res = devm_of_mdiobus_register(dev, mbus, mnp);
- if (res)
- return res;
-
- priv->mbus_int = mbus;
-
- return 0;
-}
-
-static int yt921x_extif_wait(struct yt921x_priv *priv)
-{
- u32 val = 0;
-
- return yt921x_reg_wait(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START,
- &val);
-}
-
-static int
-yt921x_extif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp)
-{
- struct device *dev = to_device(priv);
- u32 mask;
- u32 ctrl;
- u32 val;
- int res;
-
- res = yt921x_extif_wait(priv);
- if (res)
- return res;
-
- mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
- YT921X_MBUS_CTRL_TYPE_M | YT921X_MBUS_CTRL_OP_M;
- ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
- YT921X_MBUS_CTRL_TYPE_C22 | YT921X_MBUS_CTRL_READ;
- res = yt921x_reg_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
- if (res)
- return res;
- res = yt921x_reg_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
- if (res)
- return res;
-
- res = yt921x_extif_wait(priv);
- if (res)
- return res;
- res = yt921x_reg_read(priv, YT921X_EXT_MBUS_DIN, &val);
- if (res)
- return res;
-
- if ((u16)val != val)
- dev_info(dev,
- "%s: port %d, reg 0x%x: Expected u16, got 0x%08x\n",
- __func__, port, reg, val);
- *valp = (u16)val;
- return 0;
-}
-
-static int
-yt921x_extif_write(struct yt921x_priv *priv, int port, int reg, u16 val)
-{
- u32 mask;
- u32 ctrl;
- int res;
-
- res = yt921x_extif_wait(priv);
- if (res)
- return res;
-
- mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
- YT921X_MBUS_CTRL_TYPE_M | YT921X_MBUS_CTRL_OP_M;
- ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
- YT921X_MBUS_CTRL_TYPE_C22 | YT921X_MBUS_CTRL_WRITE;
- res = yt921x_reg_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
- if (res)
- return res;
- res = yt921x_reg_write(priv, YT921X_EXT_MBUS_DOUT, val);
- if (res)
- return res;
- res = yt921x_reg_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
- if (res)
- return res;
-
- return yt921x_extif_wait(priv);
-}
-
-static int yt921x_mbus_ext_read(struct mii_bus *mbus, int port, int reg)
-{
- struct yt921x_priv *priv = mbus->priv;
- u16 val;
- int res;
-
- mutex_lock(&priv->reg_lock);
- res = yt921x_extif_read(priv, port, reg, &val);
- mutex_unlock(&priv->reg_lock);
-
- if (res)
- return res;
- return val;
-}
-
-static int
-yt921x_mbus_ext_write(struct mii_bus *mbus, int port, int reg, u16 data)
-{
- struct yt921x_priv *priv = mbus->priv;
- int res;
-
- mutex_lock(&priv->reg_lock);
- res = yt921x_extif_write(priv, port, reg, data);
- mutex_unlock(&priv->reg_lock);
-
- return res;
-}
-
-static int
-yt921x_mbus_ext_init(struct yt921x_priv *priv, struct device_node *mnp)
-{
- struct device *dev = to_device(priv);
- struct mii_bus *mbus;
- int res;
-
- mbus = devm_mdiobus_alloc(dev);
- if (!mbus)
- return -ENOMEM;
-
- mbus->name = "YT921x external MDIO bus";
- snprintf(mbus->id, MII_BUS_ID_SIZE, "%s@ext", dev_name(dev));
- mbus->priv = priv;
- /* TODO: c45? */
- mbus->read = yt921x_mbus_ext_read;
- mbus->write = yt921x_mbus_ext_write;
- mbus->parent = dev;
-
- res = devm_of_mdiobus_register(dev, mbus, mnp);
- if (res)
- return res;
-
- priv->mbus_ext = mbus;
-
- return 0;
-}
-
/* Read and handle overflow of 32bit MIBs. MIB buffer must be zeroed before. */
static int yt921x_read_mib(struct yt921x_priv *priv, int port)
{
diff --git a/drivers/net/dsa/motorcomm/chip.h b/drivers/net/dsa/motorcomm/chip.h
index b9a9e9d22d4b..21132a147d6b 100644
--- a/drivers/net/dsa/motorcomm/chip.h
+++ b/drivers/net/dsa/motorcomm/chip.h
@@ -243,27 +243,6 @@ enum yt921x_speed {
#define YT9218_SYS_CLK_167M 0
#define YT921X_SYS_CLK_143M 1
-#define YT921X_EXT_MBUS_OP 0x6a000
-#define YT921X_INT_MBUS_OP 0xf0000
-#define YT921X_MBUS_OP_START BIT(0)
-#define YT921X_EXT_MBUS_CTRL 0x6a004
-#define YT921X_INT_MBUS_CTRL 0xf0004
-#define YT921X_MBUS_CTRL_PORT_M GENMASK(25, 21)
-#define YT921X_MBUS_CTRL_PORT(x) FIELD_PREP(YT921X_MBUS_CTRL_PORT_M, (x))
-#define YT921X_MBUS_CTRL_REG_M GENMASK(20, 16)
-#define YT921X_MBUS_CTRL_REG(x) FIELD_PREP(YT921X_MBUS_CTRL_REG_M, (x))
-#define YT921X_MBUS_CTRL_TYPE_M GENMASK(11, 8) /* wild guess */
-#define YT921X_MBUS_CTRL_TYPE(x) FIELD_PREP(YT921X_MBUS_CTRL_TYPE_M, (x))
-#define YT921X_MBUS_CTRL_TYPE_C22 YT921X_MBUS_CTRL_TYPE(4)
-#define YT921X_MBUS_CTRL_OP_M GENMASK(3, 2) /* wild guess */
-#define YT921X_MBUS_CTRL_OP(x) FIELD_PREP(YT921X_MBUS_CTRL_OP_M, (x))
-#define YT921X_MBUS_CTRL_WRITE YT921X_MBUS_CTRL_OP(1)
-#define YT921X_MBUS_CTRL_READ YT921X_MBUS_CTRL_OP(2)
-#define YT921X_EXT_MBUS_DOUT 0x6a008
-#define YT921X_INT_MBUS_DOUT 0xf0008
-#define YT921X_EXT_MBUS_DIN 0x6a00c
-#define YT921X_INT_MBUS_DIN 0xf000c
-
#define YT921X_PORTn_EGR(port) (0x100000 + 4 * (port))
#define YT921X_PORT_EGR_TPID_CTAG_M GENMASK(5, 4)
#define YT921X_PORT_EGR_TPID_CTAG(x) FIELD_PREP(YT921X_PORT_EGR_TPID_CTAG_M, (x))
diff --git a/drivers/net/dsa/motorcomm/mdio_bus.c b/drivers/net/dsa/motorcomm/mdio_bus.c
new file mode 100644
index 000000000000..ba70343f3f33
--- /dev/null
+++ b/drivers/net/dsa/motorcomm/mdio_bus.c
@@ -0,0 +1,278 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2026 David Yang
+ */
+
+#include <linux/of_mdio.h>
+
+#include "chip.h"
+#include "mdio_bus.h"
+#include "smi.h"
+
+#define to_device(priv) ((priv)->ds.dev)
+
+static int yt921x_intif_wait(struct yt921x_priv *priv)
+{
+ u32 val = 0;
+
+ return yt921x_reg_wait(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START,
+ &val);
+}
+
+static int
+yt921x_intif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp)
+{
+ struct device *dev = to_device(priv);
+ u32 mask;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_intif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_READ;
+ res = yt921x_reg_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ res = yt921x_intif_wait(priv);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, YT921X_INT_MBUS_DIN, &val);
+ if (res)
+ return res;
+
+ if ((u16)val != val)
+ dev_info(dev,
+ "%s: port %d, reg 0x%x: Expected u16, got 0x%08x\n",
+ __func__, port, reg, val);
+ *valp = (u16)val;
+ return 0;
+}
+
+static int
+yt921x_intif_write(struct yt921x_priv *priv, int port, int reg, u16 val)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ res = yt921x_intif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_WRITE;
+ res = yt921x_reg_update_bits(priv, YT921X_INT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_INT_MBUS_DOUT, val);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_INT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ return yt921x_intif_wait(priv);
+}
+
+static int yt921x_mbus_int_read(struct mii_bus *mbus, int port, int reg)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ u16 val;
+ int res;
+
+ if (port >= YT921X_PORT_NUM)
+ return U16_MAX;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_intif_read(priv, port, reg, &val);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ return res;
+ return val;
+}
+
+static int
+yt921x_mbus_int_write(struct mii_bus *mbus, int port, int reg, u16 data)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ int res;
+
+ if (port >= YT921X_PORT_NUM)
+ return -ENODEV;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_intif_write(priv, port, reg, data);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+int yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp)
+{
+ struct device *dev = to_device(priv);
+ struct mii_bus *mbus;
+ int res;
+
+ mbus = devm_mdiobus_alloc(dev);
+ if (!mbus)
+ return -ENOMEM;
+
+ mbus->name = "YT921x internal MDIO bus";
+ snprintf(mbus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
+ mbus->priv = priv;
+ mbus->read = yt921x_mbus_int_read;
+ mbus->write = yt921x_mbus_int_write;
+ mbus->parent = dev;
+ mbus->phy_mask = (u32)~GENMASK(YT921X_PORT_NUM - 1, 0);
+
+ res = devm_of_mdiobus_register(dev, mbus, mnp);
+ if (res)
+ return res;
+
+ priv->mbus_int = mbus;
+
+ return 0;
+}
+
+static int yt921x_extif_wait(struct yt921x_priv *priv)
+{
+ u32 val = 0;
+
+ return yt921x_reg_wait(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START,
+ &val);
+}
+
+static int
+yt921x_extif_read(struct yt921x_priv *priv, int port, int reg, u16 *valp)
+{
+ struct device *dev = to_device(priv);
+ u32 mask;
+ u32 ctrl;
+ u32 val;
+ int res;
+
+ res = yt921x_extif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_TYPE_M | YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_TYPE_C22 | YT921X_MBUS_CTRL_READ;
+ res = yt921x_reg_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ res = yt921x_extif_wait(priv);
+ if (res)
+ return res;
+ res = yt921x_reg_read(priv, YT921X_EXT_MBUS_DIN, &val);
+ if (res)
+ return res;
+
+ if ((u16)val != val)
+ dev_info(dev,
+ "%s: port %d, reg 0x%x: Expected u16, got 0x%08x\n",
+ __func__, port, reg, val);
+ *valp = (u16)val;
+ return 0;
+}
+
+static int
+yt921x_extif_write(struct yt921x_priv *priv, int port, int reg, u16 val)
+{
+ u32 mask;
+ u32 ctrl;
+ int res;
+
+ res = yt921x_extif_wait(priv);
+ if (res)
+ return res;
+
+ mask = YT921X_MBUS_CTRL_PORT_M | YT921X_MBUS_CTRL_REG_M |
+ YT921X_MBUS_CTRL_TYPE_M | YT921X_MBUS_CTRL_OP_M;
+ ctrl = YT921X_MBUS_CTRL_PORT(port) | YT921X_MBUS_CTRL_REG(reg) |
+ YT921X_MBUS_CTRL_TYPE_C22 | YT921X_MBUS_CTRL_WRITE;
+ res = yt921x_reg_update_bits(priv, YT921X_EXT_MBUS_CTRL, mask, ctrl);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_EXT_MBUS_DOUT, val);
+ if (res)
+ return res;
+ res = yt921x_reg_write(priv, YT921X_EXT_MBUS_OP, YT921X_MBUS_OP_START);
+ if (res)
+ return res;
+
+ return yt921x_extif_wait(priv);
+}
+
+static int yt921x_mbus_ext_read(struct mii_bus *mbus, int port, int reg)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ u16 val;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_extif_read(priv, port, reg, &val);
+ mutex_unlock(&priv->reg_lock);
+
+ if (res)
+ return res;
+ return val;
+}
+
+static int
+yt921x_mbus_ext_write(struct mii_bus *mbus, int port, int reg, u16 data)
+{
+ struct yt921x_priv *priv = mbus->priv;
+ int res;
+
+ mutex_lock(&priv->reg_lock);
+ res = yt921x_extif_write(priv, port, reg, data);
+ mutex_unlock(&priv->reg_lock);
+
+ return res;
+}
+
+int yt921x_mbus_ext_init(struct yt921x_priv *priv, struct device_node *mnp)
+{
+ struct device *dev = to_device(priv);
+ struct mii_bus *mbus;
+ int res;
+
+ mbus = devm_mdiobus_alloc(dev);
+ if (!mbus)
+ return -ENOMEM;
+
+ mbus->name = "YT921x external MDIO bus";
+ snprintf(mbus->id, MII_BUS_ID_SIZE, "%s@ext", dev_name(dev));
+ mbus->priv = priv;
+ /* TODO: c45? */
+ mbus->read = yt921x_mbus_ext_read;
+ mbus->write = yt921x_mbus_ext_write;
+ mbus->parent = dev;
+
+ res = devm_of_mdiobus_register(dev, mbus, mnp);
+ if (res)
+ return res;
+
+ priv->mbus_ext = mbus;
+
+ return 0;
+}
diff --git a/drivers/net/dsa/motorcomm/mdio_bus.h b/drivers/net/dsa/motorcomm/mdio_bus.h
new file mode 100644
index 000000000000..261a71c637f5
--- /dev/null
+++ b/drivers/net/dsa/motorcomm/mdio_bus.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2026 David Yang
+ */
+
+#ifndef _YT_MDIO_BUS_H
+#define _YT_MDIO_BUS_H
+
+#include <linux/of.h>
+
+#define YT921X_EXT_MBUS_OP 0x6a000
+#define YT921X_INT_MBUS_OP 0xf0000
+#define YT921X_MBUS_OP_START BIT(0)
+#define YT921X_EXT_MBUS_CTRL 0x6a004
+#define YT921X_INT_MBUS_CTRL 0xf0004
+#define YT921X_MBUS_CTRL_PORT_M GENMASK(25, 21)
+#define YT921X_MBUS_CTRL_PORT(x) FIELD_PREP(YT921X_MBUS_CTRL_PORT_M, (x))
+#define YT921X_MBUS_CTRL_REG_M GENMASK(20, 16)
+#define YT921X_MBUS_CTRL_REG(x) FIELD_PREP(YT921X_MBUS_CTRL_REG_M, (x))
+#define YT921X_MBUS_CTRL_TYPE_M GENMASK(11, 8) /* wild guess */
+#define YT921X_MBUS_CTRL_TYPE(x) FIELD_PREP(YT921X_MBUS_CTRL_TYPE_M, (x))
+#define YT921X_MBUS_CTRL_TYPE_C22 YT921X_MBUS_CTRL_TYPE(4)
+#define YT921X_MBUS_CTRL_OP_M GENMASK(3, 2) /* wild guess */
+#define YT921X_MBUS_CTRL_OP(x) FIELD_PREP(YT921X_MBUS_CTRL_OP_M, (x))
+#define YT921X_MBUS_CTRL_WRITE YT921X_MBUS_CTRL_OP(1)
+#define YT921X_MBUS_CTRL_READ YT921X_MBUS_CTRL_OP(2)
+#define YT921X_EXT_MBUS_DOUT 0x6a008
+#define YT921X_INT_MBUS_DOUT 0xf0008
+#define YT921X_EXT_MBUS_DIN 0x6a00c
+#define YT921X_INT_MBUS_DIN 0xf000c
+
+struct yt921x_priv;
+
+int yt921x_mbus_int_init(struct yt921x_priv *priv, struct device_node *mnp);
+int yt921x_mbus_ext_init(struct yt921x_priv *priv, struct device_node *mnp);
+
+#endif
--
2.53.0
next prev parent reply other threads:[~2026-09-09 19:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-09 19:05 [PATCH net-next 0/7] net: dsa: motorcomm: Add SerDes PCS David Yang
2026-09-09 19:05 ` [PATCH net-next 1/7] net: dsa: motorcomm: Split xMII and SERDES port masks David Yang
2026-09-10 20:59 ` Andrew Lunn
2026-09-10 21:37 ` David Yang
2026-09-09 19:05 ` [PATCH net-next 2/7] net: dsa: motorcomm: Check port type with runtime info David Yang
2026-09-09 19:05 ` [PATCH net-next 3/7] net: dsa: motorcomm: Fix port control/status register bit field names David Yang
2026-09-09 19:05 ` [PATCH net-next 4/7] net: dsa: motorcomm: Introduce yt921x_speed David Yang
2026-09-09 19:05 ` [PATCH net-next 5/7] net: dsa: motorcomm: Hoist port_to_priv helper into chip.h David Yang
2026-09-09 19:05 ` David Yang [this message]
2026-09-09 19:05 ` [PATCH net-next 7/7] net: dsa: motorcomm: Add SerDes PCS David Yang
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