* [PATCH net-next v5 3/5] mfd: ac200: Add X-Powers AC200 support
2026-08-09 20:28 [PATCH net-next v5 0/5] net: phy: add X-Powers AC200/AC300 EPHY support James Hilliard
2026-08-09 20:28 ` [PATCH net-next v5 1/5] dt-bindings: mfd: x-powers: Add AC200 James Hilliard
2026-08-09 20:28 ` [PATCH net-next v5 2/5] mfd: syscon: Add managed registration for external regmaps James Hilliard
@ 2026-08-09 20:28 ` James Hilliard
2026-08-09 20:28 ` [PATCH net-next v5 4/5] dt-bindings: net: x-powers: add AC200/AC300 EPHY packages James Hilliard
2026-08-09 20:28 ` [PATCH net-next v5 5/5] net: phy: add X-Powers AC200/AC300 EPHY driver James Hilliard
4 siblings, 0 replies; 11+ messages in thread
From: James Hilliard @ 2026-08-09 20:28 UTC (permalink / raw)
To: Lee Jones, Arnd Bergmann, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, James Hilliard, Andrew Lunn, David S. Miller,
Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn,
Heiner Kallweit, Russell King
Cc: mfd, devicetree, linux-kernel, netdev
The X-Powers AC200 is a mixed-signal companion IC with a paged register
map accessed over I2C.
Enable the shared input clock and prevent its rate from changing. Match
the vendor driver's 40 ms wait before the first register access,
initialize the paged regmap, report the chip and package revision, and
apply common reset.
The Ethernet PHY link endpoint is independently enumerated on its MDIO
bus, so publish the regmap through managed syscon registration for lookup
through its AC200 firmware reference rather than creating an artificial
MFD platform child. The managed entry is withdrawn before the regmap is
released, while the function driver separately manages the PHY analog
supply.
Cache only the common page selector. Individual functions can reset
independently and invalidate their other registers without regmap's
knowledge, so leave all functional registers volatile.
Reset the chip during managed teardown and system shutdown. Consumers
can use device links to ensure that they unbind before the shared AC200
resources are released.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
---
drivers/mfd/Kconfig | 12 ++++
drivers/mfd/Makefile | 1 +
drivers/mfd/ac200.c | 170 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 183 insertions(+)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 763ce6a34782..95e3c62742bb 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -205,6 +205,18 @@ config MFD_AC100
This driver include only the core APIs. You have to select individual
components like codecs or RTC under the corresponding menus.
+config MFD_AC200
+ tristate "X-Powers AC200"
+ depends on I2C
+ depends on OF
+ select MFD_SYSCON
+ select REGMAP_I2C
+ help
+ Support for the X-Powers AC200 mixed-signal companion IC. The AC200
+ contains audio, video, RTC and Fast Ethernet PHY functions and is
+ co-packaged with some Allwinner H6 and H616 SoCs. This driver provides
+ the shared register access used by the individual function drivers.
+
config MFD_AXP20X
tristate
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index dd4bb7e77c33..890e76a9ad00 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -150,6 +150,7 @@ obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
obj-$(CONFIG_MFD_AC100) += ac100.o
+obj-$(CONFIG_MFD_AC200) += ac200.o
obj-$(CONFIG_MFD_AXP20X) += axp20x.o
obj-$(CONFIG_MFD_AXP20X_I2C) += axp20x-i2c.o
obj-$(CONFIG_MFD_AXP20X_RSB) += axp20x-rsb.o
diff --git a/drivers/mfd/ac200.c b/drivers/mfd/ac200.c
new file mode 100644
index 000000000000..25066bb36ac7
--- /dev/null
+++ b/drivers/mfd/ac200.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MFD core driver for the X-Powers AC200
+ *
+ * Copyright (C) 2019 Jernej Skrabec <jernej.skrabec@gmail.com>
+ * Copyright (C) 2026 James Hilliard <james.hilliard1@gmail.com>
+ *
+ * Based on the AC100 driver:
+ * Copyright (C) 2016 Chen-Yu Tsai
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#define AC200_SYS_VERSION_REG 0x0000
+#define AC200_SYS_VERSION_PACKAGE_MASK GENMASK(15, 14)
+#define AC200_SYS_VERSION_CHIP_MASK GENMASK(11, 0)
+
+#define AC200_SYS_CONTROL_REG 0x0002
+#define AC200_SYS_CONTROL_CHIP_RESET_DEASSERT BIT(0)
+
+/* Interface register accessible from every register page. */
+#define AC200_TWI_REG_ADDR_H 0x00fe
+#define AC200_MAX_REG 0xa1f2
+
+struct ac200 {
+ struct regmap *regmap;
+};
+
+static const struct regmap_range_cfg ac200_range_cfg[] = {
+ {
+ .range_max = AC200_MAX_REG,
+ .selector_reg = AC200_TWI_REG_ADDR_H,
+ .selector_mask = 0xff,
+ .window_len = 256,
+ },
+};
+
+/*
+ * Each AC200 sub-block can reset independently, invalidating its register
+ * contents without regmap's knowledge. Cache only the common page selector;
+ * this avoids a selector read-modify-write for every access on the same page
+ * without ever returning stale functional-register values.
+ */
+static bool ac200_volatile_reg(struct device *dev, unsigned int reg)
+{
+ return reg != AC200_TWI_REG_ADDR_H;
+}
+
+static const struct regmap_config ac200_regmap_config = {
+ .name = "ac200",
+ .reg_bits = 8,
+ .reg_stride = 2,
+ .val_bits = 16,
+ .ranges = ac200_range_cfg,
+ .num_ranges = ARRAY_SIZE(ac200_range_cfg),
+ .max_register = AC200_MAX_REG,
+ .volatile_reg = ac200_volatile_reg,
+ .cache_type = REGCACHE_MAPLE,
+};
+
+static void ac200_disable(void *data)
+{
+ struct ac200 *ddata = data;
+
+ regmap_write(ddata->regmap, AC200_SYS_CONTROL_REG, 0);
+}
+
+static int ac200_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ unsigned int version;
+ struct ac200 *ddata;
+ struct clk *clk;
+ int ret;
+
+ ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ clk = devm_clk_get_enabled(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk),
+ "failed to enable input clock\n");
+
+ ret = devm_clk_rate_exclusive_get(dev, clk);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to lock clock rate\n");
+
+ ddata->regmap = devm_regmap_init_i2c(client, &ac200_regmap_config);
+ if (IS_ERR(ddata->regmap))
+ return dev_err_probe(dev, PTR_ERR(ddata->regmap),
+ "failed to initialize regmap\n");
+
+ i2c_set_clientdata(client, ddata);
+
+ /*
+ * No minimum delay is documented. Match the vendor driver's 40 ms delay
+ * before its first AC200 register access after enabling the input clock.
+ */
+ msleep(40);
+
+ ret = regmap_read(ddata->regmap, AC200_SYS_VERSION_REG, &version);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to read chip version\n");
+
+ dev_info(dev, "AC200 revision %#lx in package %lu\n",
+ FIELD_GET(AC200_SYS_VERSION_CHIP_MASK, version),
+ FIELD_GET(AC200_SYS_VERSION_PACKAGE_MASK, version));
+
+ /* Reset the chip after dependent function drivers have unbound. */
+ ret = devm_add_action_or_reset(dev, ac200_disable, ddata);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ddata->regmap, AC200_SYS_CONTROL_REG, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ddata->regmap, AC200_SYS_CONTROL_REG,
+ AC200_SYS_CONTROL_CHIP_RESET_DEASSERT);
+ if (ret)
+ return ret;
+
+ ret = devm_of_syscon_register_regmap(dev, dev->of_node,
+ ddata->regmap);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to register regmap\n");
+
+ return 0;
+}
+
+static void ac200_shutdown(struct i2c_client *client)
+{
+ ac200_disable(i2c_get_clientdata(client));
+}
+
+static const struct of_device_id ac200_of_match[] = {
+ { .compatible = "x-powers,ac200" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ac200_of_match);
+
+static const struct i2c_device_id ac200_i2c_ids[] = {
+ { .name = "ac200" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ac200_i2c_ids);
+
+static struct i2c_driver ac200_driver = {
+ .driver = {
+ .name = "ac200",
+ .of_match_table = ac200_of_match,
+ },
+ .probe = ac200_probe,
+ .shutdown = ac200_shutdown,
+ .id_table = ac200_i2c_ids,
+};
+module_i2c_driver(ac200_driver);
+
+MODULE_AUTHOR("James Hilliard <james.hilliard1@gmail.com>");
+MODULE_DESCRIPTION("X-Powers AC200 MFD core driver");
+MODULE_LICENSE("GPL");
--
2.53.0
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH net-next v5 5/5] net: phy: add X-Powers AC200/AC300 EPHY driver
2026-08-09 20:28 [PATCH net-next v5 0/5] net: phy: add X-Powers AC200/AC300 EPHY support James Hilliard
` (3 preceding siblings ...)
2026-08-09 20:28 ` [PATCH net-next v5 4/5] dt-bindings: net: x-powers: add AC200/AC300 EPHY packages James Hilliard
@ 2026-08-09 20:28 ` James Hilliard
4 siblings, 0 replies; 11+ messages in thread
From: James Hilliard @ 2026-08-09 20:28 UTC (permalink / raw)
To: Lee Jones, Arnd Bergmann, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, James Hilliard, Andrew Lunn, David S. Miller,
Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn,
Heiner Kallweit, Russell King
Cc: mfd, devicetree, linux-kernel, netdev
The AC200 and AC300 contain compatible Fast Ethernet link PHYs, but the
link endpoint is inaccessible until package-specific control registers
have powered and configured it.
Add one PHY driver which binds the link child and joins its parent
Ethernet PHY package. Fixed package compatibles select the corresponding
backend. The generic ACx00 compatible reads one packed configuration field
and selects the backend before touching backend-specific resources. The
AC300 path therefore does not resolve or access the candidate AC200 I2C
device.
AC200 locates the I2C device referenced by the package and establishes a
managed device link before obtaining its regmap through syscon. The link
keeps the supplier bound until the PHY consumer has unbound, while the
syscon lookup defers probing until the AC200 driver has published its
managed regmap. Firmware must make the selected AC200 provider path
available before the PHY probes.
AC300 uses the PHY package helpers to access the control range at base
address plus 16. Keeping both backends in the same module lets the common
link implementation own the complete PHY without registering artificial
control devices.
Obtain and manage the selected package supply, calibration and input
clock, validate or program the link address, and apply the required reset,
clock, I/O and shutdown sequences. Start in the hardware-default MII mode
so the forced PHY device can probe before a MAC attaches, then apply the
MAC-provided MII or RMII mode before the normal PHY soft reset.
Apply the common vendor analog initialization, optional AC300
low-calibration tuning and board-selected receive-clock inversion. Keep
MDI/MDI-X in automatic mode. Preserve standard MAC-managed EEE support
while disabling the vendor PHY-autonomous Intelligent EEE mode.
Power down the package control block and its supply during PHY suspend,
then restore them and the vendor configuration during resume. If
shutdown fails, attempt to recover the running PHY before returning the
original error.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
---
drivers/net/phy/Kconfig | 11 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/xpowers/Makefile | 3 +
drivers/net/phy/xpowers/ac200.c | 315 +++++++++++++++++++++++
drivers/net/phy/xpowers/ac300.c | 387 ++++++++++++++++++++++++++++
drivers/net/phy/xpowers/acx00.c | 536 +++++++++++++++++++++++++++++++++++++++
drivers/net/phy/xpowers/acx00.h | 28 ++
7 files changed, 1281 insertions(+)
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index a29d3fed8a05..27b8ffe4b539 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -475,6 +475,17 @@ config VITESSE_PHY
help
Currently supports the vsc8244
+config XPOWERS_ACX00_PHY
+ tristate "X-Powers AC200/AC300 Ethernet PHY"
+ depends on COMMON_CLK && NVMEM && OF_MDIO && REGULATOR
+ depends on I2C || !I2C
+ select PHY_PACKAGE
+ help
+ Enable the Fast Ethernet PHY driver shared by the X-Powers AC200
+ and AC300 companion ICs. The driver configures their common MDIO PHY
+ registers and the package-specific AC200 I2C or AC300 MDIO control
+ registers.
+
config XILINX_GMII2RGMII
tristate "Xilinx GMII2RGMII converter driver"
help
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index e23df5e836e9..ffb0efbc4cc4 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -100,4 +100,5 @@ obj-$(CONFIG_SMSC_PHY) += smsc.o
obj-$(CONFIG_STE10XP) += ste10Xp.o
obj-$(CONFIG_TERANETICS_PHY) += teranetics.o
obj-$(CONFIG_VITESSE_PHY) += vitesse.o
+obj-$(CONFIG_XPOWERS_ACX00_PHY) += xpowers/
obj-$(CONFIG_XILINX_GMII2RGMII) += xilinx_gmii2rgmii.o
diff --git a/drivers/net/phy/xpowers/Makefile b/drivers/net/phy/xpowers/Makefile
new file mode 100644
index 000000000000..ae977a795832
--- /dev/null
+++ b/drivers/net/phy/xpowers/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+xpowers-acx00-y := acx00.o ac200.o ac300.o
+obj-$(CONFIG_XPOWERS_ACX00_PHY) += xpowers-acx00.o
diff --git a/drivers/net/phy/xpowers/ac200.c b/drivers/net/phy/xpowers/ac200.c
new file mode 100644
index 000000000000..681e013be401
--- /dev/null
+++ b/drivers/net/phy/xpowers/ac200.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * X-Powers AC200 Ethernet PHY package backend
+ *
+ * Copyright (c) 2022 Arm Ltd. (Andre Przywara <andre.przywara@arm.com>)
+ * Copyright (C) 2026 James Hilliard <james.hilliard1@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include "acx00.h"
+
+#define AC200_EPHY_BPS_EFFUSE_OFFSET 3
+#define AC200_EPHY_CLK_RATE_24_MHZ 24000000
+#define AC200_EPHY_CLK_RATE_27_MHZ 27000000
+
+#define AC200_SYS_EPHY_CTL0_REG 0x0014
+#define AC200_EPHY_RESET_DEASSERT BIT(0)
+#define AC200_EPHY_SYSCLK_ENABLE BIT(1)
+
+#define AC200_SYS_EPHY_CTL1_REG 0x0016
+#define AC200_EPHY_MII_IO_ENABLE BIT(0)
+
+/* AC200-internal copy of the Ethernet PHY calibration eFuse. */
+#define AC200_EFUSE_EPHY_REG 0x8004
+
+#define AC200_EPHY_CTL_REG 0x6000
+#define AC200_EPHY_SHUTDOWN BIT(0)
+#define AC200_EPHY_CLK_SEL_24_MHZ BIT(2)
+#define AC200_EPHY_PHY_ADDR_MASK GENMASK(8, 4)
+#define AC200_EPHY_RMII_SEL BIT(11)
+#define AC200_EPHY_BPS_EFFUSE_MASK GENMASK(15, 12)
+
+struct ac200_ephy_ctl {
+ struct acx00_ephy_control control;
+ struct regmap *regmap;
+ struct regulator *vcc;
+ struct device *dev;
+ u16 ephy_ctl;
+ unsigned int phy_addr;
+ phy_interface_t interface;
+ bool supply_enabled;
+ bool powered;
+};
+
+static u16 ac200_ephy_ctl_config(const struct ac200_ephy_ctl *priv)
+{
+ return priv->ephy_ctl |
+ (priv->interface == PHY_INTERFACE_MODE_RMII ?
+ AC200_EPHY_RMII_SEL : 0) |
+ FIELD_PREP(AC200_EPHY_PHY_ADDR_MASK, priv->phy_addr);
+}
+
+static int ac200_ephy_ctl_write(struct ac200_ephy_ctl *priv,
+ unsigned int reg, u16 value)
+{
+ int ret;
+
+ ret = regmap_write(priv->regmap, reg, value);
+ if (ret)
+ dev_err(priv->dev, "failed to write register %#x: %pe\n",
+ reg, ERR_PTR(ret));
+
+ return ret;
+}
+
+static int ac200_ephy_ctl_disable(struct ac200_ephy_ctl *priv)
+{
+ int err;
+ int ret = 0;
+
+ if (priv->powered) {
+ ret = ac200_ephy_ctl_write(priv, AC200_EPHY_CTL_REG,
+ ac200_ephy_ctl_config(priv) |
+ AC200_EPHY_SHUTDOWN);
+ err = ac200_ephy_ctl_write(priv, AC200_SYS_EPHY_CTL1_REG, 0);
+ if (!ret)
+ ret = err;
+ err = ac200_ephy_ctl_write(priv, AC200_SYS_EPHY_CTL0_REG, 0);
+ if (!ret)
+ ret = err;
+
+ priv->powered = false;
+ }
+
+ if (priv->supply_enabled) {
+ err = regulator_disable(priv->vcc);
+ if (!err)
+ priv->supply_enabled = false;
+ else if (!ret)
+ ret = err;
+ }
+
+ return ret;
+}
+
+static int ac200_ephy_ctl_power_off(struct acx00_ephy_control *control)
+{
+ struct ac200_ephy_ctl *priv =
+ container_of(control, struct ac200_ephy_ctl, control);
+
+ return ac200_ephy_ctl_disable(priv);
+}
+
+static int
+ac200_ephy_ctl_set_interface(struct acx00_ephy_control *control,
+ phy_interface_t interface)
+{
+ struct ac200_ephy_ctl *priv =
+ container_of(control, struct ac200_ephy_ctl, control);
+ int ret = 0;
+
+ if (interface != PHY_INTERFACE_MODE_MII &&
+ interface != PHY_INTERFACE_MODE_RMII)
+ return -EINVAL;
+
+ if (priv->interface == interface)
+ return 0;
+
+ if (priv->powered)
+ ret = regmap_update_bits(priv->regmap, AC200_EPHY_CTL_REG,
+ AC200_EPHY_RMII_SEL,
+ interface == PHY_INTERFACE_MODE_RMII ?
+ AC200_EPHY_RMII_SEL : 0);
+ if (!ret)
+ priv->interface = interface;
+
+ return ret;
+}
+
+static int ac200_ephy_ctl_power_on(struct acx00_ephy_control *control,
+ unsigned int phy_addr)
+{
+ struct ac200_ephy_ctl *priv =
+ container_of(control, struct ac200_ephy_ctl, control);
+ u16 ephy_ctl;
+ int ret;
+
+ if (phy_addr > FIELD_MAX(AC200_EPHY_PHY_ADDR_MASK))
+ return -EINVAL;
+
+ if (priv->powered && priv->phy_addr == phy_addr)
+ return 0;
+
+ if (priv->powered) {
+ ret = ac200_ephy_ctl_disable(priv);
+ if (ret)
+ return ret;
+ }
+ priv->phy_addr = phy_addr;
+
+ if (!priv->supply_enabled) {
+ ret = regulator_enable(priv->vcc);
+ if (ret)
+ return ret;
+ priv->supply_enabled = true;
+ }
+
+ ephy_ctl = ac200_ephy_ctl_config(priv);
+
+ /* Start from a disabled state before applying the configuration. */
+ ret = ac200_ephy_ctl_write(priv, AC200_SYS_EPHY_CTL0_REG, 0);
+ if (ret)
+ goto err_disable;
+
+ ret = ac200_ephy_ctl_write(priv, AC200_SYS_EPHY_CTL1_REG,
+ AC200_EPHY_MII_IO_ENABLE);
+ if (ret)
+ goto err_disable;
+
+ ret = ac200_ephy_ctl_write(priv, AC200_EPHY_CTL_REG,
+ ephy_ctl | AC200_EPHY_SHUTDOWN);
+ if (ret)
+ goto err_disable;
+
+ ret = ac200_ephy_ctl_write(priv, AC200_SYS_EPHY_CTL0_REG,
+ AC200_EPHY_RESET_DEASSERT |
+ AC200_EPHY_SYSCLK_ENABLE);
+ if (ret)
+ goto err_disable;
+
+ ret = ac200_ephy_ctl_write(priv, AC200_EPHY_CTL_REG, ephy_ctl);
+ if (ret)
+ goto err_disable;
+
+ priv->powered = true;
+ return 0;
+
+err_disable:
+ /* Attempt every step of the shutdown sequence after a partial start. */
+ priv->powered = true;
+ ac200_ephy_ctl_disable(priv);
+
+ return ret;
+}
+
+struct acx00_ephy_control *
+ac200_ephy_ctl_create(struct phy_device *phydev,
+ struct device_node *package_node,
+ bool has_calibration, u8 calibration)
+{
+ struct device *dev = &phydev->mdio.dev;
+ unsigned int internal_calibration;
+ struct device_node *ac200_node;
+ struct ac200_ephy_ctl *priv;
+ struct i2c_client *client;
+ struct device_link *link;
+ unsigned long clk_rate;
+ u8 bps_effuse_code;
+ struct clk *clk;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return ERR_PTR(-ENOMEM);
+ priv->dev = dev;
+ priv->vcc = devm_of_regulator_get(dev, package_node, "vcc");
+ if (IS_ERR(priv->vcc))
+ return ERR_PTR(dev_err_probe(dev, PTR_ERR(priv->vcc),
+ "failed to get package supply\n"));
+
+ ac200_node = of_parse_phandle(package_node, "x-powers,ac200", 0);
+ if (!ac200_node)
+ return ERR_PTR(dev_err_probe(dev, -EINVAL,
+ "missing x-powers,ac200 reference\n"));
+ client = of_find_i2c_device_by_node(ac200_node);
+ of_node_put(ac200_node);
+ if (!client) {
+ ret = IS_ENABLED(CONFIG_I2C) ? -EPROBE_DEFER : -ENODEV;
+ return ERR_PTR(dev_err_probe(dev, ret,
+ "AC200 device is not registered\n"));
+ }
+
+ link = device_link_add(dev, &client->dev,
+ DL_FLAG_AUTOREMOVE_CONSUMER);
+ if (!link) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "failed to link AC200 device\n");
+ goto out_put_client;
+ }
+
+ if (READ_ONCE(link->status) != DL_STATE_CONSUMER_PROBE) {
+ ret = dev_err_probe(dev, -EPROBE_DEFER,
+ "AC200 driver is not ready\n");
+ goto out_put_client;
+ }
+
+ priv->regmap = syscon_regmap_lookup_by_phandle(package_node,
+ "x-powers,ac200");
+ if (IS_ERR(priv->regmap)) {
+ ret = dev_err_probe(dev, PTR_ERR(priv->regmap),
+ "failed to get AC200 regmap\n");
+ goto out_error;
+ }
+
+ if (!has_calibration) {
+ ret = regmap_read(priv->regmap, AC200_EFUSE_EPHY_REG,
+ &internal_calibration);
+ if (ret)
+ goto out_error;
+ calibration = internal_calibration;
+ }
+
+ /* The vendor driver supplies no transfer function beyond this offset. */
+ bps_effuse_code = (calibration + AC200_EPHY_BPS_EFFUSE_OFFSET) &
+ FIELD_MAX(AC200_EPHY_BPS_EFFUSE_MASK);
+ priv->ephy_ctl =
+ FIELD_PREP(AC200_EPHY_BPS_EFFUSE_MASK, bps_effuse_code);
+ /* EPHY_MODE and BIST_CLK_EN stay clear for normal operation. */
+
+ clk = clk_get(&client->dev, NULL);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto out_error;
+ }
+
+ clk_rate = clk_get_rate(clk);
+ clk_put(clk);
+
+ switch (clk_rate) {
+ case AC200_EPHY_CLK_RATE_24_MHZ:
+ priv->ephy_ctl |= AC200_EPHY_CLK_SEL_24_MHZ;
+ break;
+ case AC200_EPHY_CLK_RATE_27_MHZ:
+ break;
+ default:
+ ret = dev_err_probe(dev, -EINVAL,
+ "unsupported AC200 clock rate %lu Hz\n",
+ clk_rate);
+ goto out_put_client;
+ }
+
+ priv->control.power_on = ac200_ephy_ctl_power_on;
+ priv->control.power_off = ac200_ephy_ctl_power_off;
+ priv->control.set_interface = ac200_ephy_ctl_set_interface;
+ /* MII is the reset default used until the MAC supplies its interface. */
+ priv->interface = PHY_INTERFACE_MODE_MII;
+ put_device(&client->dev);
+
+ return &priv->control;
+
+out_error:
+ ret = dev_err_probe(dev, ret, "failed to initialize AC200 control\n");
+out_put_client:
+ put_device(&client->dev);
+ return ERR_PTR(ret);
+}
diff --git a/drivers/net/phy/xpowers/ac300.c b/drivers/net/phy/xpowers/ac300.c
new file mode 100644
index 000000000000..aa560432a14c
--- /dev/null
+++ b/drivers/net/phy/xpowers/ac300.c
@@ -0,0 +1,387 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * X-Powers AC300 Ethernet PHY package backend
+ *
+ * Copyright (C) 2026 James Hilliard <james.hilliard1@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/regulator/consumer.h>
+
+#include "../phylib.h"
+#include "acx00.h"
+
+#define AC300_EPHY_BGS_EFFUSE_OFFSET 3
+#define AC300_EPHY_CLK_RATE_24_MHZ 24000000
+#define AC300_EPHY_CLK_RATE_25_MHZ 25000000
+#define AC300_EPHY_CLK_RATE_27_MHZ 27000000
+#define AC300_SYS_CONTROL_REG 0x00
+#define AC300_PACKAGE_STATUS_MASK GENMASK(11, 8)
+#define AC300_EPHY_CLK_SEL_MASK GENMASK(7, 6)
+#define AC300_EPHY_CLK_SEL_25_MHZ FIELD_PREP(AC300_EPHY_CLK_SEL_MASK, 0)
+#define AC300_EPHY_CLK_SEL_27_MHZ FIELD_PREP(AC300_EPHY_CLK_SEL_MASK, 1)
+#define AC300_EPHY_CLK_SEL_24_MHZ FIELD_PREP(AC300_EPHY_CLK_SEL_MASK, 2)
+#define AC300_EFUSE_CLK_ENABLE BIT(5)
+#define AC300_EPHY_REG_CLK_ENABLE BIT(4)
+#define AC300_CLKIN_GATING_ENABLE BIT(2)
+#define AC300_EPHY_RESET_DEASSERT BIT(1)
+#define AC300_CHIP_RESET_DEASSERT BIT(0)
+
+#define AC300_PACKAGE_POR_INTERNAL_DLDO BIT(3)
+#define AC300_PACKAGE_PHY_ADDR_MASK GENMASK(2, 0)
+
+#define AC300_SYS_BIAS1_REG 0x02
+#define AC300_INTERNAL_DLDO_ENABLE BIT(15)
+
+#define AC300_SYS_IO_REG 0x05
+#define AC300_MDIO_DRV_MASK GENMASK(15, 14)
+#define AC300_MII_DRV_MASK GENMASK(11, 10)
+#define AC300_IO_DRV_LEVEL_2 2
+#define AC300_CLKIN_PAD_ENABLE BIT(4)
+#define AC300_EPHY_MII_IO_ENABLE BIT(0)
+
+#define AC300_EPHY_CONFIG_REG 0x06
+#define AC300_EPHY_BGS_EFFUSE_MASK GENMASK(15, 12)
+#define AC300_EPHY_RMII_SEL BIT(11)
+#define AC300_EPHY_SHUTDOWN BIT(0)
+
+#define AC300_SYS_CONTROL_ENABLE_BITS \
+ (AC300_EFUSE_CLK_ENABLE | AC300_EPHY_REG_CLK_ENABLE | \
+ AC300_CLKIN_GATING_ENABLE | AC300_EPHY_RESET_DEASSERT | \
+ AC300_CHIP_RESET_DEASSERT)
+
+#define AC300_SYS_IO_VALUE \
+ (FIELD_PREP(AC300_MDIO_DRV_MASK, AC300_IO_DRV_LEVEL_2) | \
+ FIELD_PREP(AC300_MII_DRV_MASK, AC300_IO_DRV_LEVEL_2) | \
+ AC300_CLKIN_PAD_ENABLE | AC300_EPHY_MII_IO_ENABLE)
+
+struct ac300_ephy_ctl {
+ struct acx00_ephy_control control;
+ struct phy_device *phydev;
+ struct regulator *vcc;
+ struct clk *clk;
+ u16 sys_control;
+ u16 ephy_config;
+ phy_interface_t interface;
+ bool package_known;
+ bool internal_dldo;
+ bool supply_enabled;
+ bool powered;
+};
+
+static unsigned int
+ac300_ephy_ctl_link_addr(const struct ac300_ephy_ctl *priv)
+{
+ return priv->phydev->mdio.addr;
+}
+
+static int ac300_ephy_ctl_read(struct ac300_ephy_ctl *priv, u32 regnum)
+{
+ int ret;
+
+ phy_lock_mdio_bus(priv->phydev);
+ ret = __phy_package_read(priv->phydev,
+ AC300_EPHY_CONTROL_ADDR_OFFSET, regnum);
+ phy_unlock_mdio_bus(priv->phydev);
+
+ return ret;
+}
+
+static int ac300_ephy_ctl_write(struct ac300_ephy_ctl *priv, u32 regnum,
+ u16 val)
+{
+ int ret;
+
+ phy_lock_mdio_bus(priv->phydev);
+ ret = __phy_package_write(priv->phydev,
+ AC300_EPHY_CONTROL_ADDR_OFFSET, regnum, val);
+ phy_unlock_mdio_bus(priv->phydev);
+
+ return ret;
+}
+
+static int ac300_ephy_ctl_modify(struct ac300_ephy_ctl *priv, u32 regnum,
+ u16 mask, u16 set)
+{
+ int ret;
+
+ phy_lock_mdio_bus(priv->phydev);
+ ret = __phy_package_read(priv->phydev,
+ AC300_EPHY_CONTROL_ADDR_OFFSET, regnum);
+ if (ret >= 0) {
+ u16 val = (ret & ~mask) | (set & mask);
+
+ ret = val == ret ? 0 :
+ __phy_package_write(priv->phydev,
+ AC300_EPHY_CONTROL_ADDR_OFFSET,
+ regnum, val);
+ }
+ phy_unlock_mdio_bus(priv->phydev);
+
+ return ret;
+}
+
+static u16 ac300_ephy_ctl_config(const struct ac300_ephy_ctl *priv)
+{
+ return priv->ephy_config |
+ (priv->interface == PHY_INTERFACE_MODE_RMII ?
+ AC300_EPHY_RMII_SEL : 0);
+}
+
+static u16 ac300_ephy_ctl_reset_value(const struct ac300_ephy_ctl *priv)
+{
+ /*
+ * A chip reset restores DLDOEN to one. Until PKG_STATUS has identified
+ * the supply arrangement, preserve any external-VDD setup left by the
+ * bootloader by asserting only the EPHY reset.
+ */
+ return !priv->package_known || !priv->internal_dldo ?
+ AC300_CHIP_RESET_DEASSERT : 0;
+}
+
+static int ac300_ephy_ctl_disable(struct ac300_ephy_ctl *priv)
+{
+ int err;
+ int ret = 0;
+
+ if (priv->powered) {
+ ret = ac300_ephy_ctl_write(priv, AC300_EPHY_CONFIG_REG,
+ ac300_ephy_ctl_config(priv) |
+ AC300_EPHY_SHUTDOWN);
+ err = ac300_ephy_ctl_write(priv, AC300_SYS_IO_REG, 0);
+ if (!ret)
+ ret = err;
+ err = ac300_ephy_ctl_write(priv, AC300_SYS_CONTROL_REG,
+ ac300_ephy_ctl_reset_value(priv));
+ if (!ret)
+ ret = err;
+
+ clk_disable_unprepare(priv->clk);
+ priv->powered = false;
+ }
+
+ if (priv->supply_enabled) {
+ err = regulator_disable(priv->vcc);
+ if (!err)
+ priv->supply_enabled = false;
+ else if (!ret)
+ ret = err;
+ }
+
+ return ret;
+}
+
+static int ac300_ephy_ctl_power_off(struct acx00_ephy_control *control)
+{
+ struct ac300_ephy_ctl *priv =
+ container_of(control, struct ac300_ephy_ctl, control);
+
+ return ac300_ephy_ctl_disable(priv);
+}
+
+static int
+ac300_ephy_ctl_set_interface(struct acx00_ephy_control *control,
+ phy_interface_t interface)
+{
+ struct ac300_ephy_ctl *priv =
+ container_of(control, struct ac300_ephy_ctl, control);
+ int ret = 0;
+
+ if (interface != PHY_INTERFACE_MODE_MII &&
+ interface != PHY_INTERFACE_MODE_RMII)
+ return -EINVAL;
+
+ if (priv->interface == interface)
+ return 0;
+
+ if (priv->powered)
+ ret = ac300_ephy_ctl_modify(priv, AC300_EPHY_CONFIG_REG,
+ AC300_EPHY_RMII_SEL,
+ interface == PHY_INTERFACE_MODE_RMII ?
+ AC300_EPHY_RMII_SEL : 0);
+ if (!ret)
+ priv->interface = interface;
+
+ return ret;
+}
+
+static int ac300_ephy_ctl_power_on(struct acx00_ephy_control *control,
+ unsigned int phy_addr)
+{
+ struct ac300_ephy_ctl *priv =
+ container_of(control, struct ac300_ephy_ctl, control);
+ u8 package_status;
+ u16 reset_value;
+ int sys_control;
+ int ret;
+
+ if (phy_addr != ac300_ephy_ctl_link_addr(priv))
+ return -EINVAL;
+
+ if (priv->powered)
+ return 0;
+
+ if (!priv->supply_enabled) {
+ ret = regulator_enable(priv->vcc);
+ if (ret)
+ return ret;
+ priv->supply_enabled = true;
+
+ /* Wait for the power-on reset interval specified by the manual. */
+ fsleep(10000);
+ }
+
+ ret = clk_prepare_enable(priv->clk);
+ if (ret)
+ goto err_power_off;
+ priv->powered = true;
+
+ /* Keep the external-supply configuration across chip resets. */
+ reset_value = ac300_ephy_ctl_reset_value(priv);
+ ret = ac300_ephy_ctl_write(priv, AC300_SYS_CONTROL_REG, reset_value);
+ if (ret)
+ goto err_power_off;
+
+ /* The manual requires both resets to be released before the clocks. */
+ ret = ac300_ephy_ctl_write(priv, AC300_SYS_CONTROL_REG,
+ AC300_EPHY_RESET_DEASSERT |
+ AC300_CHIP_RESET_DEASSERT);
+ if (ret)
+ goto err_power_off;
+
+ /* Retain the vendor clock-enable defaults, including the eFuse clock. */
+ ret = ac300_ephy_ctl_write(priv, AC300_SYS_CONTROL_REG,
+ priv->sys_control);
+ if (ret)
+ goto err_power_off;
+
+ sys_control = ac300_ephy_ctl_read(priv, AC300_SYS_CONTROL_REG);
+ if (sys_control < 0) {
+ ret = sys_control;
+ goto err_power_off;
+ }
+
+ package_status = FIELD_GET(AC300_PACKAGE_STATUS_MASK, sys_control);
+ if ((~package_status & AC300_PACKAGE_PHY_ADDR_MASK) !=
+ ac300_ephy_ctl_link_addr(priv)) {
+ ret = -EINVAL;
+ goto err_power_off;
+ }
+
+ priv->internal_dldo = package_status & AC300_PACKAGE_POR_INTERNAL_DLDO;
+ priv->package_known = true;
+ ret = ac300_ephy_ctl_modify(priv, AC300_SYS_BIAS1_REG,
+ AC300_INTERNAL_DLDO_ENABLE,
+ priv->internal_dldo ?
+ AC300_INTERNAL_DLDO_ENABLE : 0);
+ if (ret)
+ goto err_power_off;
+
+ /* Keep the documented default drive level and leave the IRQ disabled. */
+ ret = ac300_ephy_ctl_write(priv, AC300_SYS_IO_REG,
+ AC300_SYS_IO_VALUE);
+ if (ret)
+ goto err_power_off;
+
+ fsleep(10000);
+
+ ret = ac300_ephy_ctl_write(priv, AC300_EPHY_CONFIG_REG,
+ ac300_ephy_ctl_config(priv) |
+ AC300_EPHY_SHUTDOWN);
+ if (ret)
+ goto err_power_off;
+
+ fsleep(10000);
+
+ ret = ac300_ephy_ctl_write(priv, AC300_EPHY_CONFIG_REG,
+ ac300_ephy_ctl_config(priv));
+ if (ret)
+ goto err_power_off;
+
+ return 0;
+
+err_power_off:
+ ac300_ephy_ctl_disable(priv);
+
+ return ret;
+}
+
+static void ac300_ephy_clk_put(void *data)
+{
+ clk_put(data);
+}
+
+struct acx00_ephy_control *
+ac300_ephy_ctl_create(struct phy_device *phydev,
+ struct device_node *package_node, u8 calibration)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct ac300_ephy_ctl *priv;
+ unsigned long clk_rate;
+ u8 bgs_effuse_code;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return ERR_PTR(-ENOMEM);
+ if (phydev->mdio.addr > FIELD_MAX(AC300_PACKAGE_PHY_ADDR_MASK))
+ return ERR_PTR(dev_err_probe(dev, -EINVAL,
+ "link address is outside the package range\n"));
+ priv->phydev = phydev;
+
+ priv->vcc = devm_of_regulator_get(dev, package_node, "vcc");
+ if (IS_ERR(priv->vcc))
+ return ERR_PTR(dev_err_probe(dev, PTR_ERR(priv->vcc),
+ "failed to get package supply\n"));
+
+ priv->clk = of_clk_get(package_node, 0);
+ if (IS_ERR(priv->clk))
+ return ERR_PTR(dev_err_probe(dev, PTR_ERR(priv->clk),
+ "failed to get input clock\n"));
+
+ ret = devm_add_action_or_reset(dev, ac300_ephy_clk_put, priv->clk);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = devm_clk_rate_exclusive_get(dev, priv->clk);
+ if (ret)
+ return ERR_PTR(dev_err_probe(dev, ret,
+ "failed to lock clock rate\n"));
+
+ clk_rate = clk_get_rate(priv->clk);
+ switch (clk_rate) {
+ case AC300_EPHY_CLK_RATE_24_MHZ:
+ priv->sys_control = AC300_EPHY_CLK_SEL_24_MHZ;
+ break;
+ case AC300_EPHY_CLK_RATE_25_MHZ:
+ priv->sys_control = AC300_EPHY_CLK_SEL_25_MHZ;
+ break;
+ case AC300_EPHY_CLK_RATE_27_MHZ:
+ priv->sys_control = AC300_EPHY_CLK_SEL_27_MHZ;
+ break;
+ default:
+ return ERR_PTR(dev_err_probe(dev, -EINVAL,
+ "unsupported input clock rate %lu Hz\n",
+ clk_rate));
+ }
+ priv->sys_control |= AC300_SYS_CONTROL_ENABLE_BITS;
+
+ /* The vendor driver supplies no transfer function beyond this offset. */
+ bgs_effuse_code = (calibration + AC300_EPHY_BGS_EFFUSE_OFFSET) &
+ FIELD_MAX(AC300_EPHY_BGS_EFFUSE_MASK);
+ priv->ephy_config =
+ FIELD_PREP(AC300_EPHY_BGS_EFFUSE_MASK, bgs_effuse_code);
+ /* EPHY_MODE and BIST_CLK_EN stay clear for normal operation. */
+
+ priv->control.power_on = ac300_ephy_ctl_power_on;
+ priv->control.power_off = ac300_ephy_ctl_power_off;
+ priv->control.set_interface = ac300_ephy_ctl_set_interface;
+ /* MII is the reset default used until the MAC supplies its interface. */
+ priv->interface = PHY_INTERFACE_MODE_MII;
+
+ return &priv->control;
+}
diff --git a/drivers/net/phy/xpowers/acx00.c b/drivers/net/phy/xpowers/acx00.c
new file mode 100644
index 000000000000..98f2b0b63909
--- /dev/null
+++ b/drivers/net/phy/xpowers/acx00.c
@@ -0,0 +1,536 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * X-Powers AC200/AC300 Ethernet PHY driver
+ *
+ * Copyright (C) 2019 Jernej Skrabec <jernej.skrabec@gmail.com>
+ * Copyright (C) 2026 James Hilliard <james.hilliard1@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/slab.h>
+
+#include "../phylib.h"
+#include "acx00.h"
+
+#define ACX00_EPHY_ID 0x00441400
+
+#define ACX00_EPHY_CONFIG_CALIBRATION_MASK GENMASK(3, 0)
+#define ACX00_EPHY_CONFIG_VARIANT_AC300 BIT(8)
+#define ACX00_EPHY_CONFIG_CALIBRATION_LOW BIT(9)
+
+#define ACX00_PAGE_SELECT_REG 0x1f
+#define ACX00_PAGE_SELECT_MASK GENMASK(12, 8)
+#define ACX00_PAGE_0 0
+#define ACX00_PAGE_1 1
+#define ACX00_PAGE_2 2
+#define ACX00_PAGE_6 6
+#define ACX00_PAGE_8 8
+
+#define ACX00_PAGE0_GLOBAL_CONFIG_REG 0x13
+#define ACX00_PAGE0_XMII_RX_CLOCK_INVERT BIT(12)
+#define ACX00_PAGE0_MDI_MODE_MASK GENMASK(1, 0)
+#define ACX00_PAGE0_MDI_MODE_AUTO 2
+
+#define ACX00_PAGE1_APS_CONTROL_REG 0x12
+#define ACX00_PAGE1_APS_DISABLED_4S_VALUE 0x4824
+#define ACX00_PAGE1_UAPS_CONTROL_REG 0x13
+#define ACX00_PAGE1_UAPS_ENABLE BIT(15)
+#define ACX00_PAGE1_INTELLIGENT_EEE_CONTROL_REG 0x17
+#define ACX00_PAGE1_INTELLIGENT_EEE_ENABLE BIT(3)
+
+#define ACX00_PAGE2_TX_DATA_CONTROL_REG 0x18
+#define ACX00_PAGE2_10BT_FIR_SELECT_MASK GENMASK(14, 12)
+#define ACX00_PAGE2_10BT_FIR_SELECT_DEFAULT 0
+
+#define ACX00_PAGE6_ADC_CONTROL_REG 0x10
+#define ACX00_PAGE6_ADC_CONTROL_LOW_CAL_VALUE 0x5523
+#define ACX00_PAGE6_AFE_RX_CONTROL_REG 0x13
+#define ACX00_PAGE6_AFE_RX_CONTROL_VALUE 0xf000
+#define ACX00_PAGE6_AFE_EQ_RX_DETECT_CONTROL_REG 0x14
+#define AC200_PAGE6_AFE_EQ_RX_DETECT_VALUE 0x708f
+#define AC300_PAGE6_AFE_EQ_RX_DETECT_VALUE 0x708b
+#define ACX00_PAGE6_AFE_EQ_RX_DETECT_LOW_CAL_VALUE 0x7809
+#define ACX00_PAGE6_TX_LEVEL_REG 0x15
+#define ACX00_PAGE6_TX_LEVEL_100M_MASK GENMASK(15, 8)
+#define ACX00_PAGE6_TX_LEVEL_10M_MASK GENMASK(7, 0)
+#define ACX00_PAGE6_TX_LEVEL_VALUE(_100m, _10m) \
+ (FIELD_PREP(ACX00_PAGE6_TX_LEVEL_100M_MASK, (_100m)) | \
+ FIELD_PREP(ACX00_PAGE6_TX_LEVEL_10M_MASK, (_10m)))
+#define ACX00_PAGE6_TX_LEVEL_DEFAULT_VALUE \
+ ACX00_PAGE6_TX_LEVEL_VALUE(0x15, 0x30)
+#define ACX00_PAGE6_TX_LEVEL_LOW_CAL_VALUE \
+ ACX00_PAGE6_TX_LEVEL_VALUE(0x35, 0x33)
+
+#define ACX00_PAGE8_AFE_CONTROL_REG 0x18
+#define ACX00_PAGE8_AFE_CONTROL_VALUE 0x00bc
+#define ACX00_PAGE8_AUTO_CAL_CONTROL_REG 0x1d
+#define ACX00_PAGE8_AUTO_CAL_TX_LEVEL_ADJUST_BYPASS BIT(11)
+#define ACX00_PAGE8_AUTO_CAL_LOW_CAL_OPAQUE_BITS 0x0044
+#define ACX00_PAGE8_AUTO_CAL_LOW_VALUE \
+ (ACX00_PAGE8_AUTO_CAL_TX_LEVEL_ADJUST_BYPASS | \
+ ACX00_PAGE8_AUTO_CAL_LOW_CAL_OPAQUE_BITS)
+
+/*
+ * Another integration of this exact-ID PHY documents its digital vendor
+ * register map, which also matches the observed ACx00 reset values. The ACx00
+ * analog-page field encodings remain unpublished, so keep those as opaque
+ * vendor initialization values instead of inventing bit definitions.
+ */
+
+struct acx00_ephy_priv {
+ struct phy_device *phydev;
+ struct acx00_ephy_control *control;
+ bool is_ac300;
+ bool use_low_calibration_tuning;
+ bool xmii_rx_clock_inverted;
+};
+
+static int acx00_ephy_read_page(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = __phy_read(phydev, ACX00_PAGE_SELECT_REG);
+ if (ret < 0)
+ return ret;
+
+ return FIELD_GET(ACX00_PAGE_SELECT_MASK, ret);
+}
+
+static int acx00_ephy_write_page(struct phy_device *phydev, int page)
+{
+ return __phy_write(phydev, ACX00_PAGE_SELECT_REG,
+ FIELD_PREP(ACX00_PAGE_SELECT_MASK, page));
+}
+
+static int acx00_ephy_control_power_on(struct acx00_ephy_priv *priv)
+{
+ return priv->control->power_on(priv->control,
+ priv->phydev->mdio.addr);
+}
+
+static int acx00_ephy_control_power_off(struct acx00_ephy_priv *priv)
+{
+ return priv->control->power_off(priv->control);
+}
+
+static int acx00_ephy_set_interface(struct phy_device *phydev)
+{
+ struct acx00_ephy_priv *priv = phydev->priv;
+
+ if (phydev->interface == PHY_INTERFACE_MODE_NA)
+ return 0;
+ if (phydev->interface != PHY_INTERFACE_MODE_MII &&
+ phydev->interface != PHY_INTERFACE_MODE_RMII)
+ return -EINVAL;
+
+ return priv->control->set_interface(priv->control,
+ phydev->interface);
+}
+
+static void acx00_ephy_control_release(void *data)
+{
+ struct acx00_ephy_priv *priv = data;
+ int ret;
+
+ ret = acx00_ephy_control_power_off(priv);
+ if (ret)
+ phydev_warn(priv->phydev,
+ "failed to power off control block: %pe\n",
+ ERR_PTR(ret));
+}
+
+static int acx00_ephy_read_nvmem_u16(struct device_node *node,
+ const char *name, u16 *value)
+{
+ struct nvmem_cell *cell;
+ size_t i;
+ size_t len;
+ u8 *buf;
+ u16 val = 0;
+
+ cell = of_nvmem_cell_get(node, name);
+ if (IS_ERR(cell))
+ return PTR_ERR(cell);
+
+ buf = nvmem_cell_read(cell, &len);
+ nvmem_cell_put(cell);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
+ if (!len || len > sizeof(*value)) {
+ kfree(buf);
+ return len ? -ERANGE : -EINVAL;
+ }
+
+ for (i = 0; i < len; i++)
+ val |= (u16)buf[i] << (8 * i);
+ kfree(buf);
+ *value = val;
+
+ return 0;
+}
+
+static int acx00_ephy_init_package(struct phy_device *phydev,
+ struct acx00_ephy_priv *priv)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct device_node *package_node;
+ bool selectable;
+ bool fixed_ac300;
+ bool has_configuration;
+ u8 calibration;
+ u32 base_addr;
+ u16 configuration = 0;
+ int ret;
+
+ package_node = of_get_parent(dev->of_node);
+ if (!package_node)
+ return -EINVAL;
+ if (!of_node_name_eq(package_node, "ethernet-phy-package")) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "PHY is not in an Ethernet PHY package\n");
+ goto out_put_node;
+ }
+
+ ret = of_property_read_u32(package_node, "reg", &base_addr);
+ if (ret || base_addr != phydev->mdio.addr) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "package and link PHY addresses differ\n");
+ goto out_put_node;
+ }
+
+ selectable = of_device_is_compatible(package_node,
+ "x-powers,acx00-ephy-package");
+ fixed_ac300 = of_device_is_compatible(package_node,
+ "x-powers,ac300-ephy-package");
+ if (!selectable && !fixed_ac300 &&
+ !of_device_is_compatible(package_node,
+ "x-powers,ac200-ephy-package")) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "unsupported Ethernet PHY package\n");
+ goto out_put_node;
+ }
+
+ ret = devm_of_phy_package_join(dev, phydev, 0);
+ if (ret)
+ goto out_put_node;
+
+ has_configuration =
+ of_property_match_string(package_node, "nvmem-cell-names",
+ "configuration") >= 0;
+ if (has_configuration) {
+ ret = acx00_ephy_read_nvmem_u16(package_node, "configuration",
+ &configuration);
+ if (ret) {
+ ret = dev_err_probe(dev, ret,
+ "failed to read package configuration\n");
+ goto out_put_node;
+ }
+ } else if (selectable || fixed_ac300) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "package configuration is required\n");
+ goto out_put_node;
+ }
+
+ if (selectable) {
+ priv->is_ac300 =
+ configuration & ACX00_EPHY_CONFIG_VARIANT_AC300;
+ } else {
+ priv->is_ac300 = fixed_ac300;
+ if (has_configuration &&
+ !!(configuration & ACX00_EPHY_CONFIG_VARIANT_AC300) !=
+ priv->is_ac300) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "configuration does not match package\n");
+ goto out_put_node;
+ }
+ }
+
+ calibration = FIELD_GET(ACX00_EPHY_CONFIG_CALIBRATION_MASK,
+ configuration);
+
+ priv->use_low_calibration_tuning =
+ priv->is_ac300 &&
+ !!(configuration & ACX00_EPHY_CONFIG_CALIBRATION_LOW);
+ priv->xmii_rx_clock_inverted =
+ of_property_read_bool(package_node,
+ "x-powers,xmii-rx-clock-inverted");
+
+ if (priv->is_ac300)
+ priv->control =
+ ac300_ephy_ctl_create(phydev, package_node,
+ calibration);
+ else
+ priv->control =
+ ac200_ephy_ctl_create(phydev, package_node,
+ has_configuration,
+ calibration);
+ ret = PTR_ERR_OR_ZERO(priv->control);
+
+out_put_node:
+ of_node_put(package_node);
+ return ret;
+}
+
+static int acx00_ephy_disable_autonomous_eee(struct phy_device *phydev)
+{
+ return phy_modify_paged(phydev, ACX00_PAGE_1,
+ ACX00_PAGE1_INTELLIGENT_EEE_CONTROL_REG,
+ ACX00_PAGE1_INTELLIGENT_EEE_ENABLE, 0);
+}
+
+static int acx00_ephy_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct acx00_ephy_priv *priv;
+ int ret;
+
+ if (!dev->of_node)
+ return -ENODEV;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->phydev = phydev;
+ ret = acx00_ephy_init_package(phydev, priv);
+ if (ret)
+ return ret;
+
+ phydev->priv = priv;
+ ret = devm_add_action_or_reset(dev, acx00_ephy_control_release, priv);
+ if (ret)
+ return ret;
+
+ ret = acx00_ephy_control_power_on(priv);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to power on control block\n");
+
+ return 0;
+}
+
+static int acx00_ephy_soft_reset(struct phy_device *phydev)
+{
+ struct acx00_ephy_priv *priv = phydev->priv;
+ int ret;
+
+ ret = acx00_ephy_set_interface(phydev);
+ if (ret)
+ return ret;
+
+ ret = acx00_ephy_control_power_on(priv);
+ if (ret)
+ return ret;
+
+ /* ACx00 can acknowledge reset in power-down without restarting. */
+ ret = genphy_resume(phydev);
+ if (ret)
+ return ret;
+
+ return genphy_soft_reset(phydev);
+}
+
+static int acx00_ephy_config_init(struct phy_device *phydev)
+{
+ struct acx00_ephy_priv *priv = phydev->priv;
+ u16 afe_eq_rx_detect = priv->is_ac300 ?
+ AC300_PAGE6_AFE_EQ_RX_DETECT_VALUE :
+ AC200_PAGE6_AFE_EQ_RX_DETECT_VALUE;
+ u16 tx_level_value = ACX00_PAGE6_TX_LEVEL_DEFAULT_VALUE;
+ u16 global_config;
+ int oldpage;
+ int ret;
+
+ global_config = FIELD_PREP(ACX00_PAGE0_MDI_MODE_MASK,
+ ACX00_PAGE0_MDI_MODE_AUTO);
+ if (priv->xmii_rx_clock_inverted)
+ global_config |= ACX00_PAGE0_XMII_RX_CLOCK_INVERT;
+
+ ret = phy_modify_paged(phydev, ACX00_PAGE_0,
+ ACX00_PAGE0_GLOBAL_CONFIG_REG,
+ ACX00_PAGE0_XMII_RX_CLOCK_INVERT |
+ ACX00_PAGE0_MDI_MODE_MASK, global_config);
+ if (ret)
+ return ret;
+
+ if (priv->is_ac300 && priv->use_low_calibration_tuning) {
+ afe_eq_rx_detect =
+ ACX00_PAGE6_AFE_EQ_RX_DETECT_LOW_CAL_VALUE;
+ tx_level_value = ACX00_PAGE6_TX_LEVEL_LOW_CAL_VALUE;
+ }
+
+ oldpage = phy_select_page(phydev, ACX00_PAGE_1);
+ if (oldpage < 0)
+ goto out_restore_page;
+
+ ret = __phy_write(phydev, ACX00_PAGE1_APS_CONTROL_REG,
+ ACX00_PAGE1_APS_DISABLED_4S_VALUE);
+ if (ret)
+ goto out_restore_page;
+ ret = __phy_modify(phydev, ACX00_PAGE1_UAPS_CONTROL_REG,
+ ACX00_PAGE1_UAPS_ENABLE, 0);
+ if (ret)
+ goto out_restore_page;
+ ret = __phy_modify(phydev, ACX00_PAGE1_INTELLIGENT_EEE_CONTROL_REG,
+ ACX00_PAGE1_INTELLIGENT_EEE_ENABLE, 0);
+ if (ret)
+ goto out_restore_page;
+
+ ret = acx00_ephy_write_page(phydev, ACX00_PAGE_2);
+ if (ret)
+ goto out_restore_page;
+ ret = __phy_modify(phydev, ACX00_PAGE2_TX_DATA_CONTROL_REG,
+ ACX00_PAGE2_10BT_FIR_SELECT_MASK,
+ FIELD_PREP(ACX00_PAGE2_10BT_FIR_SELECT_MASK,
+ ACX00_PAGE2_10BT_FIR_SELECT_DEFAULT));
+ if (ret)
+ goto out_restore_page;
+
+ ret = acx00_ephy_write_page(phydev, ACX00_PAGE_6);
+ if (ret)
+ goto out_restore_page;
+ ret = __phy_write(phydev, ACX00_PAGE6_AFE_EQ_RX_DETECT_CONTROL_REG,
+ afe_eq_rx_detect);
+ if (ret)
+ goto out_restore_page;
+ ret = __phy_write(phydev, ACX00_PAGE6_AFE_RX_CONTROL_REG,
+ ACX00_PAGE6_AFE_RX_CONTROL_VALUE);
+ if (ret)
+ goto out_restore_page;
+ if (priv->is_ac300 && priv->use_low_calibration_tuning) {
+ ret = __phy_write(phydev, ACX00_PAGE6_ADC_CONTROL_REG,
+ ACX00_PAGE6_ADC_CONTROL_LOW_CAL_VALUE);
+ if (ret)
+ goto out_restore_page;
+ }
+ ret = __phy_write(phydev, ACX00_PAGE6_TX_LEVEL_REG, tx_level_value);
+ if (ret)
+ goto out_restore_page;
+
+ ret = acx00_ephy_write_page(phydev, ACX00_PAGE_8);
+ if (ret)
+ goto out_restore_page;
+ if (priv->is_ac300 && priv->use_low_calibration_tuning) {
+ ret = __phy_write(phydev, ACX00_PAGE8_AUTO_CAL_CONTROL_REG,
+ ACX00_PAGE8_AUTO_CAL_LOW_VALUE);
+ if (ret)
+ goto out_restore_page;
+ }
+ ret = __phy_write(phydev, ACX00_PAGE8_AFE_CONTROL_REG,
+ ACX00_PAGE8_AFE_CONTROL_VALUE);
+
+out_restore_page:
+ ret = phy_restore_page(phydev, oldpage, ret);
+ if (ret)
+ return ret;
+
+ /* Restore the standard EEE policy retained by phylib across resets. */
+ return genphy_c45_an_config_eee_aneg(phydev);
+}
+
+static int acx00_ephy_power_on_and_resume(struct phy_device *phydev)
+{
+ struct acx00_ephy_priv *priv = phydev->priv;
+ int ret;
+
+ ret = acx00_ephy_set_interface(phydev);
+ if (ret)
+ return ret;
+
+ ret = acx00_ephy_control_power_on(priv);
+ if (ret)
+ return ret;
+
+ ret = genphy_resume(phydev);
+ if (ret) {
+ acx00_ephy_control_power_off(priv);
+ return ret;
+ }
+
+ /* Powering off the control block loses the vendor-page state. */
+ return acx00_ephy_config_init(phydev);
+}
+
+static int acx00_ephy_resume(struct phy_device *phydev)
+{
+ return acx00_ephy_power_on_and_resume(phydev);
+}
+
+static int acx00_ephy_suspend(struct phy_device *phydev)
+{
+ struct acx00_ephy_priv *priv = phydev->priv;
+ int resume_ret;
+ int ret;
+
+ ret = genphy_suspend(phydev);
+ if (ret)
+ return ret;
+
+ ret = acx00_ephy_control_power_off(priv);
+ if (ret) {
+ resume_ret = acx00_ephy_power_on_and_resume(phydev);
+ if (resume_ret)
+ phydev_warn(phydev,
+ "failed to recover from suspend error: %pe\n",
+ ERR_PTR(resume_ret));
+ }
+
+ return ret;
+}
+
+static int acx00_ephy_match_phy_device(struct phy_device *phydev,
+ const struct phy_driver *phydrv)
+{
+ struct device_node *node = phydev->mdio.dev.of_node;
+ struct device_node *package_node;
+ bool match;
+
+ if (!genphy_match_phy_device(phydev, phydrv) || !node)
+ return 0;
+
+ /* RK630 reports the same PHY ID, so also match the package identity. */
+ package_node = of_get_parent(node);
+ if (!package_node)
+ return 0;
+ match = of_device_is_compatible(package_node,
+ "x-powers,ac200-ephy-package") ||
+ of_device_is_compatible(package_node,
+ "x-powers,ac300-ephy-package") ||
+ of_device_is_compatible(package_node,
+ "x-powers,acx00-ephy-package");
+ of_node_put(package_node);
+
+ return match;
+}
+
+static struct phy_driver acx00_ephy_driver[] = {
+ {
+ PHY_ID_MATCH_MODEL(ACX00_EPHY_ID),
+ .name = "X-Powers AC200/AC300 EPHY",
+ .match_phy_device = acx00_ephy_match_phy_device,
+ .probe = acx00_ephy_probe,
+ .read_page = acx00_ephy_read_page,
+ .write_page = acx00_ephy_write_page,
+ .soft_reset = acx00_ephy_soft_reset,
+ .config_init = acx00_ephy_config_init,
+ .disable_autonomous_eee = acx00_ephy_disable_autonomous_eee,
+ .suspend = acx00_ephy_suspend,
+ .resume = acx00_ephy_resume,
+ },
+};
+module_phy_driver(acx00_ephy_driver);
+
+static const struct mdio_device_id __maybe_unused acx00_ephy_tbl[] = {
+ { PHY_ID_MATCH_MODEL(ACX00_EPHY_ID) },
+ { }
+};
+MODULE_DEVICE_TABLE(mdio, acx00_ephy_tbl);
+
+MODULE_AUTHOR("James Hilliard <james.hilliard1@gmail.com>");
+MODULE_DESCRIPTION("X-Powers AC200/AC300 Ethernet PHY driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/phy/xpowers/acx00.h b/drivers/net/phy/xpowers/acx00.h
new file mode 100644
index 000000000000..7df6084c7a77
--- /dev/null
+++ b/drivers/net/phy/xpowers/acx00.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __DRIVERS_NET_PHY_XPOWERS_ACX00_H
+#define __DRIVERS_NET_PHY_XPOWERS_ACX00_H
+
+#include <linux/err.h>
+#include <linux/phy.h>
+
+#define AC300_EPHY_CONTROL_ADDR_OFFSET 16
+
+struct device_node;
+
+struct acx00_ephy_control {
+ int (*power_on)(struct acx00_ephy_control *control,
+ unsigned int phy_addr);
+ int (*power_off)(struct acx00_ephy_control *control);
+ int (*set_interface)(struct acx00_ephy_control *control,
+ phy_interface_t interface);
+};
+
+struct acx00_ephy_control *
+ac200_ephy_ctl_create(struct phy_device *phydev,
+ struct device_node *package_node,
+ bool has_calibration, u8 calibration);
+struct acx00_ephy_control *
+ac300_ephy_ctl_create(struct phy_device *phydev,
+ struct device_node *package_node, u8 calibration);
+
+#endif
--
2.53.0
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