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net: dsa: microchip: Add Microchip KSZ8863 SPI based driver support

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Add KSZ88X3 driver support. We add support for the KXZ88X3 three port
switches using the SPI Interface.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Grzeschik 2021-04-27 09:09:05 +02:00 committed by David S. Miller
parent 4b20a07e10
commit cc13e52c3a
1 changed files with 32 additions and 12 deletions
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44
drivers/net/dsa/microchip/ksz8795_spi.c
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@ -14,34 +14,52 @@
#include <linux/regmap.h> #include <linux/regmap.h>
#include <linux/spi/spi.h> #include <linux/spi/spi.h>
#include "ksz8.h"
#include "ksz_common.h" #include "ksz_common.h"
#define SPI_ADDR_SHIFT 12 #define KSZ8795_SPI_ADDR_SHIFT 12
#define SPI_ADDR_ALIGN 3 #define KSZ8795_SPI_ADDR_ALIGN 3
#define SPI_TURNAROUND_SHIFT 1 #define KSZ8795_SPI_TURNAROUND_SHIFT 1
KSZ_REGMAP_TABLE(ksz8795, 16, SPI_ADDR_SHIFT, #define KSZ8863_SPI_ADDR_SHIFT 8
SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN); #define KSZ8863_SPI_ADDR_ALIGN 8
#define KSZ8863_SPI_TURNAROUND_SHIFT 0
KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT,
KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN);
KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT,
KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN);
static int ksz8795_spi_probe(struct spi_device *spi) static int ksz8795_spi_probe(struct spi_device *spi)
{ {
const struct regmap_config *regmap_config;
struct device *ddev = &spi->dev;
struct regmap_config rc; struct regmap_config rc;
struct ksz_device *dev; struct ksz_device *dev;
int i, ret; struct ksz8 *ksz8;
int i, ret = 0;
dev = ksz_switch_alloc(&spi->dev, spi); ksz8 = devm_kzalloc(&spi->dev, sizeof(struct ksz8), GFP_KERNEL);
ksz8->priv = spi;
dev = ksz_switch_alloc(&spi->dev, ksz8);
if (!dev) if (!dev)
return -ENOMEM; return -ENOMEM;
regmap_config = device_get_match_data(ddev);
if (!regmap_config)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(ksz8795_regmap_config); i++) { for (i = 0; i < ARRAY_SIZE(ksz8795_regmap_config); i++) {
rc = ksz8795_regmap_config[i]; rc = regmap_config[i];
rc.lock_arg = &dev->regmap_mutex; rc.lock_arg = &dev->regmap_mutex;
dev->regmap[i] = devm_regmap_init_spi(spi, &rc); dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
if (IS_ERR(dev->regmap[i])) { if (IS_ERR(dev->regmap[i])) {
ret = PTR_ERR(dev->regmap[i]); ret = PTR_ERR(dev->regmap[i]);
dev_err(&spi->dev, dev_err(&spi->dev,
"Failed to initialize regmap%i: %d\n", "Failed to initialize regmap%i: %d\n",
ksz8795_regmap_config[i].val_bits, ret); regmap_config[i].val_bits, ret);
return ret; return ret;
} }
} }
@ -85,9 +103,11 @@ static void ksz8795_spi_shutdown(struct spi_device *spi)
} }
static const struct of_device_id ksz8795_dt_ids[] = { static const struct of_device_id ksz8795_dt_ids[] = {
{ .compatible = "microchip,ksz8765" }, { .compatible = "microchip,ksz8765", .data = &ksz8795_regmap_config },
{ .compatible = "microchip,ksz8794" }, { .compatible = "microchip,ksz8794", .data = &ksz8795_regmap_config },
{ .compatible = "microchip,ksz8795" }, { .compatible = "microchip,ksz8795", .data = &ksz8795_regmap_config },
{ .compatible = "microchip,ksz8863", .data = &ksz8863_regmap_config },
{ .compatible = "microchip,ksz8873", .data = &ksz8863_regmap_config },
{}, {},
}; };
MODULE_DEVICE_TABLE(of, ksz8795_dt_ids); MODULE_DEVICE_TABLE(of, ksz8795_dt_ids);