1 // SPDX-License-Identifier: GPL-2.0
3  * Meson G12A USB2 PHY driver
20 #include <linux/phy/phy.h>
169 static int phy_meson_g12a_usb2_init(struct phy *phy)  in phy_meson_g12a_usb2_init()  argument
171 	struct phy_meson_g12a_usb2_priv *priv = phy_get_drvdata(phy);  in phy_meson_g12a_usb2_init()
175 	ret = clk_prepare_enable(priv->clk);  in phy_meson_g12a_usb2_init()
179 	ret = reset_control_reset(priv->reset);  in phy_meson_g12a_usb2_init()
181 		clk_disable_unprepare(priv->clk);  in phy_meson_g12a_usb2_init()
188 	regmap_update_bits(priv->regmap, PHY_CTRL_R21,  in phy_meson_g12a_usb2_init()
192 	regmap_write(priv->regmap, PHY_CTRL_R16,  in phy_meson_g12a_usb2_init()
201 	regmap_write(priv->regmap, PHY_CTRL_R17,  in phy_meson_g12a_usb2_init()
220 	if (priv->soc_id == MESON_SOC_A1)  in phy_meson_g12a_usb2_init()
223 	regmap_write(priv->regmap, PHY_CTRL_R18, value);  in phy_meson_g12a_usb2_init()
228 	regmap_write(priv->regmap, PHY_CTRL_R16,  in phy_meson_g12a_usb2_init()
236 	/* PHY Tuning */  in phy_meson_g12a_usb2_init()
237 	regmap_write(priv->regmap, PHY_CTRL_R20,  in phy_meson_g12a_usb2_init()
247 	if (priv->soc_id == MESON_SOC_G12A)  in phy_meson_g12a_usb2_init()
248 		regmap_write(priv->regmap, PHY_CTRL_R4,  in phy_meson_g12a_usb2_init()
255 	else if (priv->soc_id == MESON_SOC_A1) {  in phy_meson_g12a_usb2_init()
256 		regmap_write(priv->regmap, PHY_CTRL_R21,  in phy_meson_g12a_usb2_init()
262 		regmap_write(priv->regmap, PHY_CTRL_R13,  in phy_meson_g12a_usb2_init()
267 	regmap_write(priv->regmap, PHY_CTRL_R3,  in phy_meson_g12a_usb2_init()
272 	if (priv->soc_id == MESON_SOC_G12A) {  in phy_meson_g12a_usb2_init()
274 		regmap_write(priv->regmap, PHY_CTRL_R14, 0);  in phy_meson_g12a_usb2_init()
275 		regmap_write(priv->regmap, PHY_CTRL_R13,  in phy_meson_g12a_usb2_init()
283 static int phy_meson_g12a_usb2_exit(struct phy *phy)  in phy_meson_g12a_usb2_exit()  argument
285 	struct phy_meson_g12a_usb2_priv *priv = phy_get_drvdata(phy);  in phy_meson_g12a_usb2_exit()
288 	ret = reset_control_reset(priv->reset);  in phy_meson_g12a_usb2_exit()
290 		clk_disable_unprepare(priv->clk);  in phy_meson_g12a_usb2_exit()
304 	struct device *dev = &pdev->dev;  in phy_meson_g12a_usb2_probe()
307 	struct phy *phy;  in phy_meson_g12a_usb2_probe()  local
313 		return -ENOMEM;  in phy_meson_g12a_usb2_probe()
315 	priv->dev = dev;  in phy_meson_g12a_usb2_probe()
322 	priv->soc_id = (uintptr_t)of_device_get_match_data(&pdev->dev);  in phy_meson_g12a_usb2_probe()
324 	priv->regmap = devm_regmap_init_mmio(dev, base,  in phy_meson_g12a_usb2_probe()
326 	if (IS_ERR(priv->regmap))  in phy_meson_g12a_usb2_probe()
327 		return PTR_ERR(priv->regmap);  in phy_meson_g12a_usb2_probe()
329 	priv->clk = devm_clk_get(dev, "xtal");  in phy_meson_g12a_usb2_probe()
330 	if (IS_ERR(priv->clk))  in phy_meson_g12a_usb2_probe()
331 		return PTR_ERR(priv->clk);  in phy_meson_g12a_usb2_probe()
333 	priv->reset = devm_reset_control_get(dev, "phy");  in phy_meson_g12a_usb2_probe()
334 	if (IS_ERR(priv->reset))  in phy_meson_g12a_usb2_probe()
335 		return PTR_ERR(priv->reset);  in phy_meson_g12a_usb2_probe()
337 	ret = reset_control_deassert(priv->reset);  in phy_meson_g12a_usb2_probe()
341 	phy = devm_phy_create(dev, NULL, &phy_meson_g12a_usb2_ops);  in phy_meson_g12a_usb2_probe()
342 	if (IS_ERR(phy)) {  in phy_meson_g12a_usb2_probe()
343 		ret = PTR_ERR(phy);  in phy_meson_g12a_usb2_probe()
344 		if (ret != -EPROBE_DEFER)  in phy_meson_g12a_usb2_probe()
345 			dev_err(dev, "failed to create PHY\n");  in phy_meson_g12a_usb2_probe()
350 	phy_set_bus_width(phy, 8);  in phy_meson_g12a_usb2_probe()
351 	phy_set_drvdata(phy, priv);  in phy_meson_g12a_usb2_probe()
360 		.compatible = "amlogic,g12a-usb2-phy",
364 		.compatible = "amlogic,a1-usb2-phy",
374 		.name		= "phy-meson-g12a-usb2",
382 MODULE_DESCRIPTION("Meson G12A USB2 PHY driver");