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// SPDX-License-Identifier: GPL-2.0
/*
* Microchip KSZ9477 series register access through SPI
*
* Copyright (C) 2017-2019 Microchip Technology Inc.
*/
#include <asm/unaligned.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include "ksz_common.h"
#define SPI_ADDR_SHIFT 24
#define SPI_ADDR_ALIGN 3
#define SPI_TURNAROUND_SHIFT 5
KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT,
SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN);
static int ksz9477_spi_probe(struct spi_device *spi)
{
struct regmap_config rc;
struct ksz_device *dev;
int i, ret;
dev = ksz_switch_alloc(&spi->dev, spi);
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_spi(spi, &rc);
if (IS_ERR(dev->regmap[i])) {
ret = PTR_ERR(dev->regmap[i]);
dev_err(&spi->dev,
"Failed to initialize regmap%i: %d\n",
ksz9477_regmap_config[i].val_bits, ret);
return ret;
}
}
if (spi->dev.platform_data)
dev->pdata = spi->dev.platform_data;
/* setup spi */
spi->mode = SPI_MODE_3;
ret = spi_setup(spi);
if (ret)
return ret;
ret = ksz9477_switch_register(dev);
/* Main DSA driver may not be started yet. */
if (ret)
return ret;
spi_set_drvdata(spi, dev);
return 0;
}
static int ksz9477_spi_remove(struct spi_device *spi)
{
struct ksz_device *dev = spi_get_drvdata(spi);
if (dev)
ksz_switch_remove(dev);
spi_set_drvdata(spi, NULL);
return 0;
}
static void ksz9477_spi_shutdown(struct spi_device *spi)
{
struct ksz_device *dev = spi_get_drvdata(spi);
if (dev)
dsa_switch_shutdown(dev->ds);
spi_set_drvdata(spi, NULL);
}
static const struct of_device_id ksz9477_dt_ids[] = {
{ .compatible = "microchip,ksz9477" },
{ .compatible = "microchip,ksz9897" },
{ .compatible = "microchip,ksz9893" },
{ .compatible = "microchip,ksz9563" },
{ .compatible = "microchip,ksz8563" },
{ .compatible = "microchip,ksz9567" },
{},
};
MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
static struct spi_driver ksz9477_spi_driver = {
.driver = {
.name = "ksz9477-switch",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(ksz9477_dt_ids),
},
.probe = ksz9477_spi_probe,
.remove = ksz9477_spi_remove,
.shutdown = ksz9477_spi_shutdown,
};
module_spi_driver(ksz9477_spi_driver);
MODULE_ALIAS("spi:ksz9477");
MODULE_ALIAS("spi:ksz9897");
MODULE_ALIAS("spi:ksz9893");
MODULE_ALIAS("spi:ksz9563");
MODULE_ALIAS("spi:ksz8563");
MODULE_ALIAS("spi:ksz9567");
MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver");
MODULE_LICENSE("GPL");
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