173a272a9f
The KSZ9477 SPI driver already has support for the KSZ8563. The same switch chip can also be managed via i2c and we have an KSZ9477 I2C driver, but that one lacks the relevant compatible entry. Add it. DT bindings already describe this compatible. Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
115 lines
2.5 KiB
C
115 lines
2.5 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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if (dev)
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ksz_switch_remove(dev);
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i2c_set_clientdata(i2c, NULL);
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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)
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return;
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if (dev->dev_ops->shutdown)
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dev->dev_ops->shutdown(dev);
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dsa_switch_shutdown(dev->ds);
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i2c_set_clientdata(i2c, NULL);
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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,ksz9563" },
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{ .compatible = "microchip,ksz9567" },
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{ .compatible = "microchip,ksz8563" },
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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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