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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/dsa/microchip/ksz9477_i2c.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/dsa/microchip/ksz9477_i2c.c')
-rw-r--r-- | drivers/net/dsa/microchip/ksz9477_i2c.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz9477_i2c.c b/drivers/net/dsa/microchip/ksz9477_i2c.c new file mode 100644 index 000000000..aae1dadef --- /dev/null +++ b/drivers/net/dsa/microchip/ksz9477_i2c.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Microchip KSZ9477 series register access through I2C + * + * Copyright (C) 2018-2019 Microchip Technology Inc. + */ + +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/regmap.h> + +#include "ksz_common.h" + +KSZ_REGMAP_TABLE(ksz9477, not_used, 16, 0, 0); + +static int ksz9477_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *i2c_id) +{ + struct regmap_config rc; + struct ksz_device *dev; + int i, ret; + + dev = ksz_switch_alloc(&i2c->dev, i2c); + if (!dev) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) { + rc = ksz9477_regmap_config[i]; + rc.lock_arg = &dev->regmap_mutex; + dev->regmap[i] = devm_regmap_init_i2c(i2c, &rc); + if (IS_ERR(dev->regmap[i])) { + ret = PTR_ERR(dev->regmap[i]); + dev_err(&i2c->dev, + "Failed to initialize regmap%i: %d\n", + ksz9477_regmap_config[i].val_bits, ret); + return ret; + } + } + + if (i2c->dev.platform_data) + dev->pdata = i2c->dev.platform_data; + + ret = ksz_switch_register(dev); + + /* Main DSA driver may not be started yet. */ + if (ret) + return ret; + + i2c_set_clientdata(i2c, dev); + + return 0; +} + +static void ksz9477_i2c_remove(struct i2c_client *i2c) +{ + struct ksz_device *dev = i2c_get_clientdata(i2c); + + if (dev) + ksz_switch_remove(dev); +} + +static void ksz9477_i2c_shutdown(struct i2c_client *i2c) +{ + struct ksz_device *dev = i2c_get_clientdata(i2c); + + if (!dev) + return; + + if (dev->dev_ops->reset) + dev->dev_ops->reset(dev); + + dsa_switch_shutdown(dev->ds); + + i2c_set_clientdata(i2c, NULL); +} + +static const struct i2c_device_id ksz9477_i2c_id[] = { + { "ksz9477-switch", 0 }, + {}, +}; + +MODULE_DEVICE_TABLE(i2c, ksz9477_i2c_id); + +static const struct of_device_id ksz9477_dt_ids[] = { + { + .compatible = "microchip,ksz9477", + .data = &ksz_switch_chips[KSZ9477] + }, + { + .compatible = "microchip,ksz9896", + .data = &ksz_switch_chips[KSZ9896] + }, + { + .compatible = "microchip,ksz9897", + .data = &ksz_switch_chips[KSZ9897] + }, + { + .compatible = "microchip,ksz9893", + .data = &ksz_switch_chips[KSZ9893] + }, + { + .compatible = "microchip,ksz9563", + .data = &ksz_switch_chips[KSZ9893] + }, + { + .compatible = "microchip,ksz8563", + .data = &ksz_switch_chips[KSZ8563] + }, + { + .compatible = "microchip,ksz9567", + .data = &ksz_switch_chips[KSZ9567] + }, + {}, +}; +MODULE_DEVICE_TABLE(of, ksz9477_dt_ids); + +static struct i2c_driver ksz9477_i2c_driver = { + .driver = { + .name = "ksz9477-switch", + .of_match_table = of_match_ptr(ksz9477_dt_ids), + }, + .probe = ksz9477_i2c_probe, + .remove = ksz9477_i2c_remove, + .shutdown = ksz9477_i2c_shutdown, + .id_table = ksz9477_i2c_id, +}; + +module_i2c_driver(ksz9477_i2c_driver); + +MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>"); +MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch I2C access Driver"); +MODULE_LICENSE("GPL v2"); |