135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Microchip KSZ9477 series register access through SPI
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*
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* Copyright (C) 2017-2019 Microchip Technology Inc.
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*/
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#include <asm/unaligned.h>
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#include <linux/delay.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 <linux/spi/spi.h>
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#include "ksz_common.h"
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#define SPI_ADDR_SHIFT 24
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#define SPI_ADDR_ALIGN 3
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#define SPI_TURNAROUND_SHIFT 5
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KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT,
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SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN);
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static int ksz9477_spi_probe(struct spi_device *spi)
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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(&spi->dev, spi);
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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_spi(spi, &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(&spi->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 (spi->dev.platform_data)
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dev->pdata = spi->dev.platform_data;
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/* setup spi */
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spi->mode = SPI_MODE_3;
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ret = spi_setup(spi);
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if (ret)
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return ret;
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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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spi_set_drvdata(spi, dev);
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return 0;
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}
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static int ksz9477_spi_remove(struct spi_device *spi)
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{
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struct ksz_device *dev = spi_get_drvdata(spi);
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if (dev)
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ksz_switch_remove(dev);
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spi_set_drvdata(spi, NULL);
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return 0;
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}
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static void ksz9477_spi_shutdown(struct spi_device *spi)
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{
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struct ksz_device *dev = spi_get_drvdata(spi);
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if (dev)
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dsa_switch_shutdown(dev->ds);
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spi_set_drvdata(spi, NULL);
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}
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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,ksz8563" },
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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 const struct spi_device_id ksz9477_spi_ids[] = {
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{ "ksz9477" },
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{ "ksz9897" },
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{ "ksz9893" },
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{ "ksz9563" },
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{ "ksz8563" },
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{ "ksz9567" },
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{ },
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};
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MODULE_DEVICE_TABLE(spi, ksz9477_spi_ids);
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static struct spi_driver ksz9477_spi_driver = {
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.driver = {
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.name = "ksz9477-switch",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(ksz9477_dt_ids),
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},
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.id_table = ksz9477_spi_ids,
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.probe = ksz9477_spi_probe,
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.remove = ksz9477_spi_remove,
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.shutdown = ksz9477_spi_shutdown,
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};
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module_spi_driver(ksz9477_spi_driver);
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MODULE_ALIAS("spi:ksz9477");
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MODULE_ALIAS("spi:ksz9897");
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MODULE_ALIAS("spi:ksz9893");
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MODULE_ALIAS("spi:ksz9563");
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MODULE_ALIAS("spi:ksz8563");
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MODULE_ALIAS("spi:ksz9567");
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MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
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MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver");
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MODULE_LICENSE("GPL");
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