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: 12+ 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
2026-09-11 11:46 ` Andrew Lunn
2026-09-11 12:32 ` 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260909190541.466476-7-mmyangfl@gmail.com \
--to=mmyangfl@gmail.com \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=netdev@vger.kernel.org \
--cc=olteanv@gmail.com \
--cc=pabeni@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.