1 // SPDX-License-Identifier: GPL-2.0
3  * MediaTek DisplayPort PHY driver
13 #include <linux/phy/phy.h>
85 static int mtk_dp_phy_init(struct phy *phy)  in mtk_dp_phy_init()  argument
87 	struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy);  in mtk_dp_phy_init()
97 	regmap_bulk_write(dp_phy->regs, MTK_DP_LANE0_DRIVING_PARAM_3,  in mtk_dp_phy_init()
99 	regmap_bulk_write(dp_phy->regs, MTK_DP_LANE1_DRIVING_PARAM_3,  in mtk_dp_phy_init()
101 	regmap_bulk_write(dp_phy->regs, MTK_DP_LANE2_DRIVING_PARAM_3,  in mtk_dp_phy_init()
103 	regmap_bulk_write(dp_phy->regs, MTK_DP_LANE3_DRIVING_PARAM_3,  in mtk_dp_phy_init()
109 static int mtk_dp_phy_configure(struct phy *phy, union phy_configure_opts *opts)  in mtk_dp_phy_configure()  argument
111 	struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy);  in mtk_dp_phy_configure()
114 	if (opts->dp.set_rate) {  in mtk_dp_phy_configure()
115 		switch (opts->dp.link_rate) {  in mtk_dp_phy_configure()
117 			dev_err(&phy->dev,  in mtk_dp_phy_configure()
119 				opts->dp.link_rate);  in mtk_dp_phy_configure()
120 			return -EINVAL;  in mtk_dp_phy_configure()
134 		regmap_write(dp_phy->regs, MTK_DP_PHY_DIG_BIT_RATE, val);  in mtk_dp_phy_configure()
137 	regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_PLL_CTL_1,  in mtk_dp_phy_configure()
138 			   TPLL_SSC_EN, opts->dp.ssc ? TPLL_SSC_EN : 0);  in mtk_dp_phy_configure()
143 static int mtk_dp_phy_reset(struct phy *phy)  in mtk_dp_phy_reset()  argument
145 	struct mtk_dp_phy *dp_phy = phy_get_drvdata(phy);  in mtk_dp_phy_reset()
147 	regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_SW_RST,  in mtk_dp_phy_reset()
150 	regmap_update_bits(dp_phy->regs, MTK_DP_PHY_DIG_SW_RST,  in mtk_dp_phy_reset()
165 	struct device *dev = &pdev->dev;  in mtk_dp_phy_probe()
167 	struct phy *phy;  in mtk_dp_phy_probe()  local
170 	regs = *(struct regmap **)dev->platform_data;  in mtk_dp_phy_probe()
172 		return dev_err_probe(dev, -EINVAL,  in mtk_dp_phy_probe()
177 		return -ENOMEM;  in mtk_dp_phy_probe()
179 	dp_phy->regs = regs;  in mtk_dp_phy_probe()
180 	phy = devm_phy_create(dev, NULL, &mtk_dp_phy_dev_ops);  in mtk_dp_phy_probe()
181 	if (IS_ERR(phy))  in mtk_dp_phy_probe()
182 		return dev_err_probe(dev, PTR_ERR(phy),  in mtk_dp_phy_probe()
183 				     "Failed to create DP PHY\n");  in mtk_dp_phy_probe()
185 	phy_set_drvdata(phy, dp_phy);  in mtk_dp_phy_probe()
186 	if (!dev->of_node)  in mtk_dp_phy_probe()
187 		phy_create_lookup(phy, "dp", dev_name(dev));  in mtk_dp_phy_probe()
195 		.name = "mediatek-dp-phy",
200 MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com>");
201 MODULE_DESCRIPTION("MediaTek DP PHY Driver");