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122 lines
2.7 KiB
122 lines
2.7 KiB
// 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 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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.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 <[email protected]>"); |
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MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver"); |
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MODULE_LICENSE("GPL");
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