dwmac-rzn1.c

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright (C) 2024 Schneider-Electric
 4 *
 5 * Clément Léger <clement.leger@bootlin.com>
 6 */
 7
 8#include <linux/of.h>
 9#include <linux/pcs-rzn1-miic.h>
10#include <linux/phylink.h>
11#include <linux/platform_device.h>
12
13#include "stmmac_platform.h"
14#include "stmmac.h"
15
16static int rzn1_dwmac_pcs_init(struct stmmac_priv *priv)
17{
18	struct device_node *np = priv->device->of_node;
19	struct device_node *pcs_node;
20	struct phylink_pcs *pcs;
21
22	pcs_node = of_parse_phandle(np, "pcs-handle", 0);
23
24	if (pcs_node) {
25		pcs = miic_create(priv->device, pcs_node);
26		of_node_put(pcs_node);
27		if (IS_ERR(pcs))
28			return PTR_ERR(pcs);
29
30		priv->hw->phylink_pcs = pcs;
31	}
32
33	return 0;
34}
35
36static void rzn1_dwmac_pcs_exit(struct stmmac_priv *priv)
37{
38	if (priv->hw->phylink_pcs)
39		miic_destroy(priv->hw->phylink_pcs);
40}
41
42static struct phylink_pcs *rzn1_dwmac_select_pcs(struct stmmac_priv *priv,
43						 phy_interface_t interface)
44{
45	return priv->hw->phylink_pcs;
46}
47
48static int rzn1_dwmac_probe(struct platform_device *pdev)
49{
50	struct plat_stmmacenet_data *plat_dat;
51	struct stmmac_resources stmmac_res;
52	struct device *dev = &pdev->dev;
53	int ret;
54
55	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
56	if (ret)
57		return ret;
58
59	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
60	if (IS_ERR(plat_dat))
61		return PTR_ERR(plat_dat);
62
63	plat_dat->bsp_priv = plat_dat;
64	plat_dat->pcs_init = rzn1_dwmac_pcs_init;
65	plat_dat->pcs_exit = rzn1_dwmac_pcs_exit;
66	plat_dat->select_pcs = rzn1_dwmac_select_pcs;
67
68	ret = stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
69	if (ret)
70		return ret;
71
72	return 0;
73}
74
75static const struct of_device_id rzn1_dwmac_match[] = {
76	{ .compatible = "renesas,rzn1-gmac" },
77	{ }
78};
79MODULE_DEVICE_TABLE(of, rzn1_dwmac_match);
80
81static struct platform_driver rzn1_dwmac_driver = {
82	.probe  = rzn1_dwmac_probe,
83	.remove = stmmac_pltfr_remove,
84	.driver = {
85		.name           = "rzn1-dwmac",
86		.of_match_table = rzn1_dwmac_match,
87	},
88};
89module_platform_driver(rzn1_dwmac_driver);
90
91MODULE_AUTHOR("Clément Léger <clement.leger@bootlin.com>");
92MODULE_DESCRIPTION("Renesas RZN1 DWMAC specific glue layer");
93MODULE_LICENSE("GPL");