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https://github.com/torvalds/linux
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e4b9a72d76
The KSZ9893 3-Port Gigabit Ethernet Switch can be controlled via SPI, I²C or MDIO (very limited and not supported by this driver). While there is already a compatible entry for the SPI bus, it was missing for I²C. Signed-off-by: Helmut Grohne <helmut.grohne@intenta.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Microchip KSZ9477 series register access through I2C
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*
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* Copyright (C) 2018-2019 Microchip Technology Inc.
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*/
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "ksz_common.h"
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KSZ_REGMAP_TABLE(ksz9477, not_used, 16, 0, 0);
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static int ksz9477_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *i2c_id)
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{
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struct regmap_config rc;
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struct ksz_device *dev;
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int i, ret;
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dev = ksz_switch_alloc(&i2c->dev, i2c);
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if (!dev)
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return -ENOMEM;
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for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) {
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rc = ksz9477_regmap_config[i];
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rc.lock_arg = &dev->regmap_mutex;
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dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc);
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if (IS_ERR(dev->regmap[i])) {
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ret = PTR_ERR(dev->regmap[i]);
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dev_err(&i2c->dev,
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"Failed to initialize regmap%i: %d\n",
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ksz9477_regmap_config[i].val_bits, ret);
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return ret;
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}
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}
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if (i2c->dev.platform_data)
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dev->pdata = i2c->dev.platform_data;
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ret = ksz9477_switch_register(dev);
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/* Main DSA driver may not be started yet. */
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if (ret)
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return ret;
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i2c_set_clientdata(i2c, dev);
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return 0;
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}
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static int ksz9477_i2c_remove(struct i2c_client *i2c)
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{
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struct ksz_device *dev = i2c_get_clientdata(i2c);
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ksz_switch_remove(dev);
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return 0;
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}
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static void ksz9477_i2c_shutdown(struct i2c_client *i2c)
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{
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struct ksz_device *dev = i2c_get_clientdata(i2c);
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if (dev && dev->dev_ops->shutdown)
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dev->dev_ops->shutdown(dev);
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}
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static const struct i2c_device_id ksz9477_i2c_id[] = {
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{ "ksz9477-switch", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id);
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static const struct of_device_id ksz9477_dt_ids[] = {
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{ .compatible = "microchip,ksz9477" },
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{ .compatible = "microchip,ksz9897" },
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{ .compatible = "microchip,ksz9893" },
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{ .compatible = "microchip,ksz9567" },
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{},
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};
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MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
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static struct i2c_driver ksz9477_i2c_driver = {
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.driver = {
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.name = "ksz9477-switch",
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.of_match_table = of_match_ptr(ksz9477_dt_ids),
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},
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.probe = ksz9477_i2c_probe,
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.remove = ksz9477_i2c_remove,
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.shutdown = ksz9477_i2c_shutdown,
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.id_table = ksz9477_i2c_id,
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};
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module_i2c_driver(ksz9477_i2c_driver);
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MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
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MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver");
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MODULE_LICENSE("GPL v2");
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