diff options
author | Tristram Ha <Tristram.Ha@microchip.com> | 2019-09-10 08:18:34 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-09-12 11:36:12 +0100 |
commit | 20e03777d70923fe7eae0d7f043ef9488393ab95 (patch) | |
tree | b49e7a62d1b86ba47f8f3836a78495ecea8558db /drivers/net/dsa | |
parent | 421bceb270e21b6db92988923445460c2e498888 (diff) | |
download | linux-20e03777d70923fe7eae0d7f043ef9488393ab95.tar.bz2 |
net: dsa: microchip: add KSZ9477 I2C driver
Add KSZ9477 I2C driver support. The code ksz9477.c and ksz_common.c are
used together to generate the I2C driver.
Signed-off-by: Tristram Ha <Tristram.Ha@microchip.com>
[george.mccollister@gmail.com: bring up to date, use ksz_common regmap macros]
Signed-off-by: George McCollister <george.mccollister@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
-rw-r--r-- | drivers/net/dsa/microchip/Kconfig | 7 | ||||
-rw-r--r-- | drivers/net/dsa/microchip/Makefile | 1 | ||||
-rw-r--r-- | drivers/net/dsa/microchip/ksz9477_i2c.c | 100 | ||||
-rw-r--r-- | drivers/net/dsa/microchip/ksz_common.h | 2 |
4 files changed, 110 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/Kconfig b/drivers/net/dsa/microchip/Kconfig index e1c23d1e91e6..1d7870c6df3c 100644 --- a/drivers/net/dsa/microchip/Kconfig +++ b/drivers/net/dsa/microchip/Kconfig @@ -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 diff --git a/drivers/net/dsa/microchip/Makefile b/drivers/net/dsa/microchip/Makefile index e3d799b95d7d..929caa81e782 100644 --- a/drivers/net/dsa/microchip/Makefile +++ b/drivers/net/dsa/microchip/Makefile @@ -1,6 +1,7 @@ # 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 diff --git a/drivers/net/dsa/microchip/ksz9477_i2c.c b/drivers/net/dsa/microchip/ksz9477_i2c.c new file mode 100644 index 000000000000..79867cc2474b --- /dev/null +++ b/drivers/net/dsa/microchip/ksz9477_i2c.c @@ -0,0 +1,100 @@ +// 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"); diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index 13d027baaa8b..a24d8e61fbe7 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -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))) |