1 // SPDX-License-Identifier: GPL-2.0
3  * Amlogic AXG MIPI + PCIE analog PHY driver
10 #include <linux/phy/phy.h>
15 #include <dt-bindings/phy/phy.h>
48 	struct phy *phy;  member
58 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_enable()
61 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_enable()
67 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_disable()
69 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_disable()
77 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_enable()
80 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_enable()
82 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_enable()
86 	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x001e);  in phy_dsi_analog_enable()
88 	regmap_write(priv->regmap, HHI_MIPI_CNTL2,  in phy_dsi_analog_enable()
92 	switch (priv->config.lanes) {  in phy_dsi_analog_enable()
109 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2,  in phy_dsi_analog_enable()
113 	priv->dsi_enabled = true;  in phy_dsi_analog_enable()
118 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_disable()
121 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, BIT(31), 0);  in phy_dsi_analog_disable()
122 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_disable()
125 	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x6);  in phy_dsi_analog_disable()
127 	regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0x00200000);  in phy_dsi_analog_disable()
129 	priv->dsi_enabled = false;  in phy_dsi_analog_disable()
132 static int phy_axg_mipi_pcie_analog_configure(struct phy *phy,  in phy_axg_mipi_pcie_analog_configure()  argument
135 	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);  in phy_axg_mipi_pcie_analog_configure()
138 	ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);  in phy_axg_mipi_pcie_analog_configure()
142 	memcpy(&priv->config, opts, sizeof(priv->config));  in phy_axg_mipi_pcie_analog_configure()
144 	priv->dsi_configured = true;  in phy_axg_mipi_pcie_analog_configure()
146 	/* If PHY was already powered on, setup the DSI analog part */  in phy_axg_mipi_pcie_analog_configure()
147 	if (priv->powered) {  in phy_axg_mipi_pcie_analog_configure()
149 		if (priv->dsi_enabled)  in phy_axg_mipi_pcie_analog_configure()
160 static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy)  in phy_axg_mipi_pcie_analog_power_on()  argument
162 	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);  in phy_axg_mipi_pcie_analog_power_on()
166 	if (priv->dsi_configured)  in phy_axg_mipi_pcie_analog_power_on()
169 	priv->powered = true;  in phy_axg_mipi_pcie_analog_power_on()
174 static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy)  in phy_axg_mipi_pcie_analog_power_off()  argument
176 	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);  in phy_axg_mipi_pcie_analog_power_off()
180 	if (priv->dsi_enabled)  in phy_axg_mipi_pcie_analog_power_off()
183 	priv->powered = false;  in phy_axg_mipi_pcie_analog_power_off()
197 	struct phy_provider *phy;  in phy_axg_mipi_pcie_analog_probe()  local
198 	struct device *dev = &pdev->dev;  in phy_axg_mipi_pcie_analog_probe()
200 	struct device_node *np = dev->of_node;  in phy_axg_mipi_pcie_analog_probe()
206 		return -ENOMEM;  in phy_axg_mipi_pcie_analog_probe()
209 	map = syscon_node_to_regmap(of_get_parent(dev->of_node));  in phy_axg_mipi_pcie_analog_probe()
216 	priv->regmap = map;  in phy_axg_mipi_pcie_analog_probe()
218 	priv->phy = devm_phy_create(dev, np, &phy_axg_mipi_pcie_analog_ops);  in phy_axg_mipi_pcie_analog_probe()
219 	if (IS_ERR(priv->phy)) {  in phy_axg_mipi_pcie_analog_probe()
220 		ret = PTR_ERR(priv->phy);  in phy_axg_mipi_pcie_analog_probe()
221 		if (ret != -EPROBE_DEFER)  in phy_axg_mipi_pcie_analog_probe()
222 			dev_err(dev, "failed to create PHY\n");  in phy_axg_mipi_pcie_analog_probe()
226 	phy_set_drvdata(priv->phy, priv);  in phy_axg_mipi_pcie_analog_probe()
229 	phy = devm_of_phy_provider_register(dev, of_phy_simple_xlate);  in phy_axg_mipi_pcie_analog_probe()
231 	return PTR_ERR_OR_ZERO(phy);  in phy_axg_mipi_pcie_analog_probe()
236 		.compatible = "amlogic,axg-mipi-pcie-analog-phy",
245 		.name = "phy-axg-mipi-pcie-analog",
252 MODULE_DESCRIPTION("Amlogic AXG MIPI + PCIE analog PHY driver");