diff options
| -rw-r--r-- | Documentation/devicetree/bindings/net/dsa/lan9303.txt | 62 | ||||
| -rw-r--r-- | drivers/net/dsa/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/net/dsa/Makefile | 2 | ||||
| -rw-r--r-- | drivers/net/dsa/lan9303_i2c.c | 113 |
4 files changed, 193 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/dsa/lan9303.txt b/Documentation/devicetree/bindings/net/dsa/lan9303.txt new file mode 100644 index 000000000000..2edc2561467a --- /dev/null +++ b/Documentation/devicetree/bindings/net/dsa/lan9303.txt @@ -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"; + }; + }; + }; diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig index 31a2b229106d..c56533bffc8c 100644 --- a/drivers/net/dsa/Kconfig +++ b/drivers/net/dsa/Kconfig @@ -50,4 +50,20 @@ config NET_DSA_MT7530 This enables support for the Mediatek MT7530 Ethernet switch chip. +config NET_DSA_SMSC_LAN9303 + tristate + 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 + tristate "SMSC/Microchip LAN9303 3-ports 10/100 ethernet switch in I2C managed mode" + depends on NET_DSA + select NET_DSA_SMSC_LAN9303 + select REGMAP_I2C + ---help--- + Enable access functions if the SMSC/Microchip LAN9303 is configured + for I2C managed mode. + endmenu diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile index 2ae07f4fbf63..c1981ba18963 100644 --- a/drivers/net/dsa/Makefile +++ b/drivers/net/dsa/Makefile @@ -3,6 +3,8 @@ 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-core.o +obj-$(CONFIG_NET_DSA_SMSC_LAN9303_I2C) += lan9303_i2c.o obj-y += b53/ obj-y += mv88e6xxx/ obj-$(CONFIG_NET_DSA_LOOP) += dsa_loop.o dsa_loop_bdinfo.o diff --git a/drivers/net/dsa/lan9303_i2c.c b/drivers/net/dsa/lan9303_i2c.c new file mode 100644 index 000000000000..ab3ce0da5071 --- /dev/null +++ b/drivers/net/dsa/lan9303_i2c.c @@ -0,0 +1,113 @@ +/* + * 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); + +MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>"); +MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode"); +MODULE_LICENSE("GPL v2"); |