110c18bfed
Add driver for the built-in Gigabit Ethernet switch which can be found in the MediaTek MT7988 SoC. The switch shares most of its design with MT7530 and MT7531, but has it's registers mapped into the SoCs register space rather than being connected externally or internally via MDIO. Introduce a new platform driver to support that. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/reset.h>
|
|
#include <net/dsa.h>
|
|
|
|
#include "mt7530.h"
|
|
|
|
static const struct of_device_id mt7988_of_match[] = {
|
|
{ .compatible = "mediatek,mt7988-switch", .data = &mt753x_table[ID_MT7988], },
|
|
{ /* sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mt7988_of_match);
|
|
|
|
static int
|
|
mt7988_probe(struct platform_device *pdev)
|
|
{
|
|
static struct regmap_config *sw_regmap_config;
|
|
struct mt7530_priv *priv;
|
|
void __iomem *base_addr;
|
|
int ret;
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->bus = NULL;
|
|
priv->dev = &pdev->dev;
|
|
|
|
ret = mt7530_probe_common(priv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
priv->rstc = devm_reset_control_get(&pdev->dev, NULL);
|
|
if (IS_ERR(priv->rstc)) {
|
|
dev_err(&pdev->dev, "Couldn't get our reset line\n");
|
|
return PTR_ERR(priv->rstc);
|
|
}
|
|
|
|
base_addr = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(base_addr)) {
|
|
dev_err(&pdev->dev, "cannot request I/O memory space\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
sw_regmap_config = devm_kzalloc(&pdev->dev, sizeof(*sw_regmap_config), GFP_KERNEL);
|
|
if (!sw_regmap_config)
|
|
return -ENOMEM;
|
|
|
|
sw_regmap_config->name = "switch";
|
|
sw_regmap_config->reg_bits = 16;
|
|
sw_regmap_config->val_bits = 32;
|
|
sw_regmap_config->reg_stride = 4;
|
|
sw_regmap_config->max_register = MT7530_CREV;
|
|
priv->regmap = devm_regmap_init_mmio(&pdev->dev, base_addr, sw_regmap_config);
|
|
if (IS_ERR(priv->regmap))
|
|
return PTR_ERR(priv->regmap);
|
|
|
|
return dsa_register_switch(priv->ds);
|
|
}
|
|
|
|
static int
|
|
mt7988_remove(struct platform_device *pdev)
|
|
{
|
|
struct mt7530_priv *priv = platform_get_drvdata(pdev);
|
|
|
|
if (priv)
|
|
mt7530_remove_common(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mt7988_shutdown(struct platform_device *pdev)
|
|
{
|
|
struct mt7530_priv *priv = platform_get_drvdata(pdev);
|
|
|
|
if (!priv)
|
|
return;
|
|
|
|
dsa_switch_shutdown(priv->ds);
|
|
|
|
dev_set_drvdata(&pdev->dev, NULL);
|
|
}
|
|
|
|
static struct platform_driver mt7988_platform_driver = {
|
|
.probe = mt7988_probe,
|
|
.remove = mt7988_remove,
|
|
.shutdown = mt7988_shutdown,
|
|
.driver = {
|
|
.name = "mt7530-mmio",
|
|
.of_match_table = mt7988_of_match,
|
|
},
|
|
};
|
|
module_platform_driver(mt7988_platform_driver);
|
|
|
|
MODULE_AUTHOR("Daniel Golle <daniel@makrotopia.org>");
|
|
MODULE_DESCRIPTION("Driver for Mediatek MT7530 Switch (MMIO)");
|
|
MODULE_LICENSE("GPL");
|