new file mode 100644
@@ -0,0 +1,62 @@
+SMSC/MicroChip LAN9303 three port ethernet switch
+-------------------------------------------------
+
+Required properties:
+
+- compatible: should be "smsc,lan9303-i2c"
+
+Optional properties:
+
+- reset-gpios: GPIO to be used to reset the whole device
+- reset-duration: reset duration in milliseconds, defaults to 200 ms
+
+Subnodes:
+
+The integrated switch subnode should be specified according to the binding
+described in dsa/dsa.txt. The CPU port of this switch is always port 0.
+
+Note: always use 'reg = <0/1/2>;' for the three DSA ports, even if the device is
+configured to use 1/2/3 instead. This hardware configuration will be
+auto-detected and mapped accordingly.
+
+Example:
+
+I2C managed mode:
+
+ master: masterdevice@X {
+ status = "okay";
+
+ fixed-link { /* RMII fixed link to LAN9303 */
+ speed = <100>;
+ full-duplex;
+ };
+ };
+
+ switch: switch@a {
+ compatible = "smsc,lan9303-i2c";
+ reg = <0xa>;
+ status = "okay";
+ reset-gpios = <&gpio7 6 GPIO_ACTIVE_LOW>;
+ reset-duration = <200>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 { /* RMII fixed link to master */
+ reg = <0>;
+ label = "cpu";
+ ethernet = <&master>;
+ };
+
+ port@1 { /* external port 1 */
+ reg = <1>;
+ label = "lan1;
+ };
+
+ port@2 { /* external port 2 */
+ reg = <2>;
+ label = "lan2";
+ };
+ };
+ };
@@ -50,4 +50,21 @@ config NET_DSA_MT7530
This enables support for the Mediatek MT7530 Ethernet switch
chip.
+menuconfig NET_DSA_SMSC_LAN9303
+ tristate "SMSC/Microchip LAN9303 3-ports 10/100 ethernet switch"
+ depends on NET_DSA
+ select NET_DSA_TAG_LAN9303
+ ---help---
+ This enables support for the SMSC/Microchip LAN9303 3 port ethernet
+ switch chips.
+
+config NET_DSA_SMSC_LAN9303_I2C
+ bool "I2C managed mode"
+ depends on NET_DSA_SMSC_LAN9303
+ depends on I2C && OF
+ select REGMAP_I2C
+ ---help---
+ Enable access functions if the SMSC/Microchip LAN9303 is configured
+ for I2C managed mode.
+
endmenu
@@ -1,8 +1,14 @@
+lan9303-objs-y := lan9303-core.o
+lan9303-objs-$(CONFIG_NET_DSA_SMSC_LAN9303_I2C) += lan9303_i2c.o
+
obj-$(CONFIG_NET_DSA_MV88E6060) += mv88e6060.o
obj-$(CONFIG_NET_DSA_BCM_SF2) += bcm-sf2.o
bcm-sf2-objs := bcm_sf2.o bcm_sf2_cfp.o
obj-$(CONFIG_NET_DSA_QCA8K) += qca8k.o
obj-$(CONFIG_NET_DSA_MT7530) += mt7530.o
+obj-$(CONFIG_NET_DSA_SMSC_LAN9303) += lan9303.o
+lan9303-objs := $(lan9303-objs-y)
+
obj-y += b53/
obj-y += mv88e6xxx/
obj-$(CONFIG_NET_DSA_LOOP) += dsa_loop.o dsa_loop_bdinfo.o
new file mode 100644
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+
+#include "lan9303.h"
+
+struct lan9303_i2c {
+ struct i2c_client *device;
+ struct lan9303 chip;
+};
+
+static const struct regmap_config lan9303_i2c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 32,
+ .reg_stride = 1,
+ .can_multi_write = true,
+ .max_register = 0x0ff, /* address bits 0..1 are not used */
+ .reg_format_endian = REGMAP_ENDIAN_LITTLE,
+
+ .volatile_table = &lan9303_register_set,
+ .wr_table = &lan9303_register_set,
+ .rd_table = &lan9303_register_set,
+
+ .cache_type = REGCACHE_NONE,
+};
+
+static int lan9303_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lan9303_i2c *sw_dev;
+ int ret;
+
+ sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c),
+ GFP_KERNEL);
+ if (!sw_dev)
+ return -ENOMEM;
+
+ sw_dev->chip.regmap = devm_regmap_init_i2c(client,
+ &lan9303_i2c_regmap_config);
+ if (IS_ERR(sw_dev->chip.regmap)) {
+ ret = PTR_ERR(sw_dev->chip.regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* link forward and backward */
+ sw_dev->device = client;
+ i2c_set_clientdata(client, sw_dev);
+ sw_dev->chip.dev = &client->dev;
+
+ ret = lan9303_probe(&sw_dev->chip, client->dev.of_node);
+ if (ret != 0)
+ return ret;
+
+ dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n");
+
+ return 0;
+}
+
+static int lan9303_i2c_remove(struct i2c_client *client)
+{
+ struct lan9303_i2c *sw_dev;
+
+ sw_dev = i2c_get_clientdata(client);
+ if (!sw_dev)
+ return -ENODEV;
+
+ return lan9303_remove(&sw_dev->chip);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct i2c_device_id lan9303_i2c_id[] = {
+ { "lan9303", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id);
+
+static const struct of_device_id lan9303_i2c_of_match[] = {
+ { .compatible = "smsc,lan9303-i2c", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match);
+
+static struct i2c_driver lan9303_i2c_driver = {
+ .driver = {
+ .name = "LAN9303_I2C",
+ .of_match_table = of_match_ptr(lan9303_i2c_of_match),
+ },
+ .probe = lan9303_i2c_probe,
+ .remove = lan9303_i2c_remove,
+ .id_table = lan9303_i2c_id,
+};
+module_i2c_driver(lan9303_i2c_driver);