net: dsa: mv88e6xxx: Add minimal platform_data support

Not all the world uses device tree. Some parts of the world still use
platform devices and platform data. Add basic support for probing a
Marvell switch via platform data.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-05-19 22:31:34 +02:00 committed by David S. Miller
parent 577941eb56
commit 877b7cb0b6
3 changed files with 67 additions and 7 deletions

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@ -8466,6 +8466,7 @@ M: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/dsa/mv88e6xxx/
F: linux/platform_data/mv88e6xxx.h
F: Documentation/devicetree/bindings/net/dsa/marvell.txt
MARVELL ARMADA DRM SUPPORT

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@ -28,6 +28,7 @@
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/platform_data/mv88e6xxx.h>
#include <linux/netdevice.h>
#include <linux/gpio/consumer.h>
#include <linux/phy.h>
@ -4350,6 +4351,7 @@ static int mv88e6xxx_register_switch(struct mv88e6xxx_chip *chip)
return -ENOMEM;
ds->priv = chip;
ds->dev = dev;
ds->ops = &mv88e6xxx_switch_ops;
ds->ageing_time_min = chip->info->age_time_coeff;
ds->ageing_time_max = chip->info->age_time_coeff * U8_MAX;
@ -4364,36 +4366,73 @@ static void mv88e6xxx_unregister_switch(struct mv88e6xxx_chip *chip)
dsa_unregister_switch(chip->ds);
}
static const void *pdata_device_get_match_data(struct device *dev)
{
const struct of_device_id *matches = dev->driver->of_match_table;
const struct dsa_mv88e6xxx_pdata *pdata = dev->platform_data;
for (; matches->name[0] || matches->type[0] || matches->compatible[0];
matches++) {
if (!strcmp(pdata->compatible, matches->compatible))
return matches->data;
}
return NULL;
}
static int mv88e6xxx_probe(struct mdio_device *mdiodev)
{
struct dsa_mv88e6xxx_pdata *pdata = mdiodev->dev.platform_data;
struct device *dev = &mdiodev->dev;
struct device_node *np = dev->of_node;
const struct mv88e6xxx_info *compat_info;
struct mv88e6xxx_chip *chip;
u32 eeprom_len;
int port;
int err;
compat_info = of_device_get_match_data(dev);
if (np)
compat_info = of_device_get_match_data(dev);
if (pdata) {
compat_info = pdata_device_get_match_data(dev);
if (!pdata->netdev)
return -EINVAL;
for (port = 0; port < DSA_MAX_PORTS; port++) {
if (!(pdata->enabled_ports & (1 << port)))
continue;
if (strcmp(pdata->cd.port_names[port], "cpu"))
continue;
pdata->cd.netdev[port] = &pdata->netdev->dev;
break;
}
}
if (!compat_info)
return -EINVAL;
chip = mv88e6xxx_alloc_chip(dev);
if (!chip)
return -ENOMEM;
if (!chip) {
err = -ENOMEM;
goto out;
}
chip->info = compat_info;
err = mv88e6xxx_smi_init(chip, mdiodev->bus, mdiodev->addr);
if (err)
return err;
goto out;
chip->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(chip->reset))
return PTR_ERR(chip->reset);
if (IS_ERR(chip->reset)) {
err = PTR_ERR(chip->reset);
goto out;
}
err = mv88e6xxx_detect(chip);
if (err)
return err;
goto out;
mv88e6xxx_phy_init(chip);
@ -4468,6 +4507,9 @@ out_g1_irq:
mv88e6xxx_irq_poll_free(chip);
mutex_unlock(&chip->reg_lock);
out:
if (pdata)
dev_put(pdata->netdev);
return err;
}

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@ -0,0 +1,17 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __DSA_MV88E6XXX_H
#define __DSA_MV88E6XXX_H
#include <net/dsa.h>
struct dsa_mv88e6xxx_pdata {
/* Must be first, such that dsa_register_switch() can access this
* without gory pointer manipulations
*/
struct dsa_chip_data cd;
const char *compatible;
unsigned int enabled_ports;
struct net_device *netdev;
};
#endif