eee16b1471
This patch perform the compatibility check for the device after the chip detect is done. It is to prevent the mismatch between the device compatible specified in the device tree and actual device found during the detect. The ksz9477 device doesn't use any .data in the of_device_id. But the ksz8795_spi uses .data for assigning the regmap between 8830 family and 87xx family switch. Changed the regmap assignment based on the chip_id from the .data. Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
150 lines
3.1 KiB
C
150 lines
3.1 KiB
C
// 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 void 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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}
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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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{
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.compatible = "microchip,ksz9477",
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.data = &ksz_switch_chips[KSZ9477]
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},
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{
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.compatible = "microchip,ksz9897",
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.data = &ksz_switch_chips[KSZ9897]
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},
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{
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.compatible = "microchip,ksz9893",
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.data = &ksz_switch_chips[KSZ9893]
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},
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{
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.compatible = "microchip,ksz9563",
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.data = &ksz_switch_chips[KSZ9893]
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},
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{
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.compatible = "microchip,ksz8563",
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.data = &ksz_switch_chips[KSZ9893]
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},
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{
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.compatible = "microchip,ksz9567",
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.data = &ksz_switch_chips[KSZ9567]
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},
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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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