1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * emac-rockchip.c - Rockchip EMAC specific glue layer
32 	struct clk *refclk;  member
39 	u32 speed_offset = emac->soc_data->grf_speed_offset;  in emac_rockchip_set_mac_speed()
55 	err = regmap_write(emac->grf, emac->soc_data->grf_offset, data);  in emac_rockchip_set_mac_speed()
77 		.compatible = "rockchip,rk3036-emac",
81 		.compatible = "rockchip,rk3066-emac",
85 		.compatible = "rockchip,rk3188-emac",
95 	struct device *dev = &pdev->dev;  in emac_rockchip_probe()
103 	if (!pdev->dev.of_node)  in emac_rockchip_probe()
104 		return -ENODEV;  in emac_rockchip_probe()
108 		return -ENOMEM;  in emac_rockchip_probe()
113 	priv->emac.drv_name = DRV_NAME;  in emac_rockchip_probe()
114 	priv->emac.set_mac_speed = emac_rockchip_set_mac_speed;  in emac_rockchip_probe()
116 	err = of_get_phy_mode(dev->of_node, &interface);  in emac_rockchip_probe()
123 		err = -ENOTSUPP;  in emac_rockchip_probe()
127 	priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node,  in emac_rockchip_probe()
129 	if (IS_ERR(priv->grf)) {  in emac_rockchip_probe()
131 			PTR_ERR(priv->grf));  in emac_rockchip_probe()
132 		err = PTR_ERR(priv->grf);  in emac_rockchip_probe()
136 	match = of_match_node(emac_rockchip_dt_ids, dev->of_node);  in emac_rockchip_probe()
137 	priv->soc_data = match->data;  in emac_rockchip_probe()
139 	priv->emac.clk = devm_clk_get(dev, "hclk");  in emac_rockchip_probe()
140 	if (IS_ERR(priv->emac.clk)) {  in emac_rockchip_probe()
142 			PTR_ERR(priv->emac.clk));  in emac_rockchip_probe()
143 		err = PTR_ERR(priv->emac.clk);  in emac_rockchip_probe()
147 	priv->refclk = devm_clk_get(dev, "macref");  in emac_rockchip_probe()
148 	if (IS_ERR(priv->refclk)) {  in emac_rockchip_probe()
150 			PTR_ERR(priv->refclk));  in emac_rockchip_probe()
151 		err = PTR_ERR(priv->refclk);  in emac_rockchip_probe()
155 	err = clk_prepare_enable(priv->refclk);  in emac_rockchip_probe()
162 	priv->regulator = devm_regulator_get_optional(dev, "phy");  in emac_rockchip_probe()
163 	if (IS_ERR(priv->regulator)) {  in emac_rockchip_probe()
164 		if (PTR_ERR(priv->regulator) == -EPROBE_DEFER) {  in emac_rockchip_probe()
165 			err = -EPROBE_DEFER;  in emac_rockchip_probe()
169 		priv->regulator = NULL;  in emac_rockchip_probe()
172 	if (priv->regulator) {  in emac_rockchip_probe()
173 		err = regulator_enable(priv->regulator);  in emac_rockchip_probe()
175 			dev_err(dev, "failed to enable phy-supply (%d)\n", err);  in emac_rockchip_probe()
181 	data = (1 << (priv->soc_data->grf_speed_offset + 16)) |  in emac_rockchip_probe()
182 	       (1 << priv->soc_data->grf_speed_offset);  in emac_rockchip_probe()
184 	data |= (1 << (priv->soc_data->grf_mode_offset + 16)) |  in emac_rockchip_probe()
185 		(0 << priv->soc_data->grf_mode_offset);  in emac_rockchip_probe()
187 	err = regmap_write(priv->grf, priv->soc_data->grf_offset, data);  in emac_rockchip_probe()
195 	err = clk_set_rate(priv->refclk, 50000000);  in emac_rockchip_probe()
202 	if (priv->soc_data->need_div_macclk) {  in emac_rockchip_probe()
203 		priv->macclk = devm_clk_get(dev, "macclk");  in emac_rockchip_probe()
204 		if (IS_ERR(priv->macclk)) {  in emac_rockchip_probe()
206 				PTR_ERR(priv->macclk));  in emac_rockchip_probe()
207 			err = PTR_ERR(priv->macclk);  in emac_rockchip_probe()
211 		err = clk_prepare_enable(priv->macclk);  in emac_rockchip_probe()
218 		err = clk_set_rate(priv->macclk, 25000000);  in emac_rockchip_probe()
235 	if (priv->soc_data->need_div_macclk)  in emac_rockchip_probe()
236 		clk_disable_unprepare(priv->macclk);  in emac_rockchip_probe()
238 	if (priv->regulator)  in emac_rockchip_probe()
239 		regulator_disable(priv->regulator);  in emac_rockchip_probe()
241 	clk_disable_unprepare(priv->refclk);  in emac_rockchip_probe()
255 	clk_disable_unprepare(priv->refclk);  in emac_rockchip_remove()
257 	if (priv->regulator)  in emac_rockchip_remove()
258 		regulator_disable(priv->regulator);  in emac_rockchip_remove()
260 	if (priv->soc_data->need_div_macclk)  in emac_rockchip_remove()
261 		clk_disable_unprepare(priv->macclk);  in emac_rockchip_remove()