# subsystems should select the appropriate symbols.
config REGMAP
- default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SOUNDWIRE_MBQ || REGMAP_SCCB || REGMAP_I3C || REGMAP_SPI_AVMM)
+ default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SOUNDWIRE_MBQ || REGMAP_SCCB || REGMAP_I3C || REGMAP_SPI_AVMM || REGMAP_MDIO)
select IRQ_DOMAIN if REGMAP_IRQ
+ select MDIO_BUS if REGMAP_MDIO
bool
config REGCACHE_COMPRESSED
tristate
depends on W1
+config REGMAP_MDIO
+ tristate
+
config REGMAP_MMIO
tristate
obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o
obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o
obj-$(CONFIG_REGMAP_SPI_AVMM) += regmap-spi-avmm.o
+obj-$(CONFIG_REGMAP_MDIO) += regmap-mdio.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/errno.h>
+#include <linux/mdio.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+static int regmap_mdio_read(void *context, unsigned int reg, unsigned int *val)
+{
+ struct mdio_device *mdio_dev = context;
+ int ret;
+
+ ret = mdiobus_read(mdio_dev->bus, mdio_dev->addr, reg);
+ *val = ret & 0xffff;
+
+ return ret < 0 ? ret : 0;
+}
+
+static int regmap_mdio_write(void *context, unsigned int reg, unsigned int val)
+{
+ struct mdio_device *mdio_dev = context;
+
+ return mdiobus_write(mdio_dev->bus, mdio_dev->addr, reg, val);
+}
+
+static const struct regmap_bus regmap_mdio_bus = {
+ .reg_write = regmap_mdio_write,
+ .reg_read = regmap_mdio_read,
+};
+
+struct regmap *__regmap_init_mdio(struct mdio_device *mdio_dev,
+ const struct regmap_config *config, struct lock_class_key *lock_key,
+ const char *lock_name)
+{
+ if (config->reg_bits != 5 || config->val_bits != 16)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ return __regmap_init(&mdio_dev->dev, ®map_mdio_bus, mdio_dev, config,
+ lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__regmap_init_mdio);
+
+struct regmap *__devm_regmap_init_mdio(struct mdio_device *mdio_dev,
+ const struct regmap_config *config, struct lock_class_key *lock_key,
+ const char *lock_name)
+{
+ if (config->reg_bits != 5 || config->val_bits != 16)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ return __devm_regmap_init(&mdio_dev->dev, ®map_mdio_bus, mdio_dev,
+ config, lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__devm_regmap_init_mdio);
+
+MODULE_AUTHOR("Sander Vanheule <sander@svanheule.net>");
+MODULE_DESCRIPTION("Regmap MDIO Module");
+MODULE_LICENSE("GPL v2");
struct i2c_client;
struct i3c_device;
struct irq_domain;
+struct mdio_device;
struct slim_device;
struct spi_device;
struct spmi_device;
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name);
+struct regmap *__regmap_init_mdio(struct mdio_device *mdio_dev,
+ const struct regmap_config *config,
+ struct lock_class_key *lock_key,
+ const char *lock_name);
struct regmap *__regmap_init_sccb(struct i2c_client *i2c,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name);
+struct regmap *__devm_regmap_init_mdio(struct mdio_device *mdio_dev,
+ const struct regmap_config *config,
+ struct lock_class_key *lock_key,
+ const char *lock_name);
struct regmap *__devm_regmap_init_sccb(struct i2c_client *i2c,
const struct regmap_config *config,
struct lock_class_key *lock_key,
i2c, config)
/**
+ * regmap_init_mdio() - Initialise register map
+ *
+ * @mdio_dev: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+#define regmap_init_mdio(mdio_dev, config) \
+ __regmap_lockdep_wrapper(__regmap_init_mdio, #config, \
+ mdio_dev, config)
+
+/**
* regmap_init_sccb() - Initialise register map
*
* @i2c: Device that will be interacted with
i2c, config)
/**
+ * devm_regmap_init_mdio() - Initialise managed register map
+ *
+ * @mdio_dev: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap. The regmap will be automatically freed by the
+ * device management code.
+ */
+#define devm_regmap_init_mdio(mdio_dev, config) \
+ __regmap_lockdep_wrapper(__devm_regmap_init_mdio, #config, \
+ mdio_dev, config)
+
+/**
* devm_regmap_init_sccb() - Initialise managed register map
*
* @i2c: Device that will be interacted with