mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 13:25:12 +07:00
69bdd2d40d
Convert platform glue layer into a proper platform driver and add it to the build system. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
|
|
* DWMAC glue for NXP LPC18xx/LPC43xx Ethernet
|
|
*
|
|
* Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_net.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/stmmac.h>
|
|
|
|
#include "stmmac_platform.h"
|
|
|
|
/* Register defines for CREG syscon */
|
|
#define LPC18XX_CREG_CREG6 0x12c
|
|
# define LPC18XX_CREG_CREG6_ETHMODE_MASK 0x7
|
|
# define LPC18XX_CREG_CREG6_ETHMODE_MII 0x0
|
|
# define LPC18XX_CREG_CREG6_ETHMODE_RMII 0x4
|
|
|
|
struct lpc18xx_dwmac_priv_data {
|
|
struct regmap *reg;
|
|
int interface;
|
|
};
|
|
|
|
static void *lpc18xx_dwmac_setup(struct platform_device *pdev)
|
|
{
|
|
struct lpc18xx_dwmac_priv_data *dwmac;
|
|
|
|
dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
|
|
if (!dwmac)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
dwmac->interface = of_get_phy_mode(pdev->dev.of_node);
|
|
if (dwmac->interface < 0)
|
|
return ERR_PTR(dwmac->interface);
|
|
|
|
dwmac->reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");
|
|
if (IS_ERR(dwmac->reg)) {
|
|
dev_err(&pdev->dev, "Syscon lookup failed\n");
|
|
return dwmac->reg;
|
|
}
|
|
|
|
return dwmac;
|
|
}
|
|
|
|
static int lpc18xx_dwmac_init(struct platform_device *pdev, void *priv)
|
|
{
|
|
struct lpc18xx_dwmac_priv_data *dwmac = priv;
|
|
u8 ethmode;
|
|
|
|
if (dwmac->interface == PHY_INTERFACE_MODE_MII) {
|
|
ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII;
|
|
} else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {
|
|
ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII;
|
|
} else {
|
|
dev_err(&pdev->dev, "Only MII and RMII mode supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regmap_update_bits(dwmac->reg, LPC18XX_CREG_CREG6,
|
|
LPC18XX_CREG_CREG6_ETHMODE_MASK, ethmode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct stmmac_of_data lpc18xx_dwmac_data = {
|
|
.has_gmac = 1,
|
|
.setup = lpc18xx_dwmac_setup,
|
|
.init = lpc18xx_dwmac_init,
|
|
};
|
|
|
|
static const struct of_device_id lpc18xx_dwmac_match[] = {
|
|
{ .compatible = "nxp,lpc1850-dwmac", .data = &lpc18xx_dwmac_data },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match);
|
|
|
|
static struct platform_driver lpc18xx_dwmac_driver = {
|
|
.probe = stmmac_pltfr_probe,
|
|
.remove = stmmac_pltfr_remove,
|
|
.driver = {
|
|
.name = "lpc18xx-dwmac",
|
|
.pm = &stmmac_pltfr_pm_ops,
|
|
.of_match_table = lpc18xx_dwmac_match,
|
|
},
|
|
};
|
|
module_platform_driver(lpc18xx_dwmac_driver);
|
|
|
|
MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
|
|
MODULE_DESCRIPTION("DWMAC glue for LPC18xx/43xx Ethernet");
|
|
MODULE_LICENSE("GPL v2");
|