net: dsa: microchip: add KSZ9477 I2C driver (20e03777) · Commits · 戴 / test

drivers/net/dsa/microchip/Kconfig

+7 −0

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		@@ -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

drivers/net/dsa/microchip/Makefile

+1 −0

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		# 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

drivers/net/dsa/microchip/ksz9477_i2c.c

0 → 100644

+100 −0

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		// 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");

drivers/net/dsa/microchip/ksz_common.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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)))

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