Commit 20e03777 authored by Tristram Ha's avatar Tristram Ha Committed by David S. Miller

net: dsa: microchip: add KSZ9477 I2C driver

Add KSZ9477 I2C driver support.  The code ksz9477.c and ksz_common.c are
used together to generate the I2C driver.
Signed-off-by: default avatarTristram Ha <Tristram.Ha@microchip.com>
[george.mccollister@gmail.com: bring up to date, use ksz_common regmap macros]
Signed-off-by: default avatarGeorge McCollister <george.mccollister@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 421bceb2
......@@ -9,6 +9,13 @@ menuconfig NET_DSA_MICROCHIP_KSZ9477
help
This driver adds support for Microchip KSZ9477 switch chips.
config NET_DSA_MICROCHIP_KSZ9477_I2C
tristate "KSZ9477 series I2C connected switch driver"
depends on NET_DSA_MICROCHIP_KSZ9477 && I2C
select REGMAP_I2C
help
Select to enable support for registering switches configured through I2C.
config NET_DSA_MICROCHIP_KSZ9477_SPI
tristate "KSZ9477 series SPI connected switch driver"
depends on NET_DSA_MICROCHIP_KSZ9477 && SPI
......
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ_COMMON) += ksz_common.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477) += ksz9477.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477_I2C) += ksz9477_i2c.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477_SPI) += ksz9477_spi.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ8795) += ksz8795.o
obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ8795_SPI) += ksz8795_spi.o
// 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 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++) {
dev->regmap[i] = devm_regmap_init_i2c(i2c,
&ksz9477_regmap_config[i]);
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 = ksz9477_switch_register(dev);
/* Main DSA driver may not be started yet. */
if (ret)
return ret;
i2c_set_clientdata(i2c, dev);
return 0;
}
static int ksz9477_i2c_remove(struct i2c_client *i2c)
{
struct ksz_device *dev = i2c_get_clientdata(i2c);
ksz_switch_remove(dev);
return 0;
}
static void ksz9477_i2c_shutdown(struct i2c_client *i2c)
{
struct ksz_device *dev = i2c_get_clientdata(i2c);
if (dev && dev->dev_ops->shutdown)
dev->dev_ops->shutdown(dev);
}
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" },
{ .compatible = "microchip,ksz9897" },
{},
};
MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
static struct i2c_driver ksz9477_i2c_driver = {
.driver = {
.name = "ksz9477-switch",
.owner = THIS_MODULE,
.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");
......@@ -294,6 +294,8 @@ static inline void ksz_pwrite32(struct ksz_device *dev, int port, int offset,
#define KSZ_SPI_OP_RD 3
#define KSZ_SPI_OP_WR 2
#define swabnot_used(x) 0
#define KSZ_SPI_OP_FLAG_MASK(opcode, swp, regbits, regpad) \
swab##swp((opcode) << ((regbits) + (regpad)))
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment