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58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/errno.h>
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#include <linux/mdio.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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static int regmap_mdio_read(void *context, unsigned int reg, unsigned int *val)
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{
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struct mdio_device *mdio_dev = context;
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int ret;
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ret = mdiobus_read(mdio_dev->bus, mdio_dev->addr, reg);
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*val = ret & 0xffff;
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return ret < 0 ? ret : 0;
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}
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static int regmap_mdio_write(void *context, unsigned int reg, unsigned int val)
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{
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struct mdio_device *mdio_dev = context;
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return mdiobus_write(mdio_dev->bus, mdio_dev->addr, reg, val);
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}
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static const struct regmap_bus regmap_mdio_bus = {
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.reg_write = regmap_mdio_write,
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.reg_read = regmap_mdio_read,
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};
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struct regmap *__regmap_init_mdio(struct mdio_device *mdio_dev,
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const struct regmap_config *config, struct lock_class_key *lock_key,
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const char *lock_name)
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{
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if (config->reg_bits != 5 || config->val_bits != 16)
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return ERR_PTR(-EOPNOTSUPP);
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return __regmap_init(&mdio_dev->dev, ®map_mdio_bus, mdio_dev, config,
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lock_key, lock_name);
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}
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EXPORT_SYMBOL_GPL(__regmap_init_mdio);
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struct regmap *__devm_regmap_init_mdio(struct mdio_device *mdio_dev,
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const struct regmap_config *config, struct lock_class_key *lock_key,
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const char *lock_name)
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{
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if (config->reg_bits != 5 || config->val_bits != 16)
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return ERR_PTR(-EOPNOTSUPP);
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return __devm_regmap_init(&mdio_dev->dev, ®map_mdio_bus, mdio_dev,
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config, lock_key, lock_name);
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}
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EXPORT_SYMBOL_GPL(__devm_regmap_init_mdio);
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MODULE_AUTHOR("Sander Vanheule <sander@svanheule.net>");
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MODULE_DESCRIPTION("Regmap MDIO Module");
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MODULE_LICENSE("GPL v2");
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