1 // SPDX-License-Identifier: GPL-2.0
3  * Amlogic AXG MIPI + PCIE analog PHY driver
10 #include <linux/phy/phy.h>
16 #include <dt-bindings/phy/phy.h>
49 	struct phy *phy;  member
59 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_enable()
62 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_enable()
68 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_disable()
70 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_bandgap_disable()
78 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_enable()
81 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_enable()
83 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_enable()
87 	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x001e);  in phy_dsi_analog_enable()
89 	regmap_write(priv->regmap, HHI_MIPI_CNTL2,  in phy_dsi_analog_enable()
93 	switch (priv->config.lanes) {  in phy_dsi_analog_enable()
110 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2,  in phy_dsi_analog_enable()
114 	priv->dsi_enabled = true;  in phy_dsi_analog_enable()
119 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_disable()
122 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, BIT(31), 0);  in phy_dsi_analog_disable()
123 	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,  in phy_dsi_analog_disable()
126 	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x6);  in phy_dsi_analog_disable()
128 	regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0x00200000);  in phy_dsi_analog_disable()
130 	priv->dsi_enabled = false;  in phy_dsi_analog_disable()
133 static int phy_axg_mipi_pcie_analog_configure(struct phy *phy,  in phy_axg_mipi_pcie_analog_configure()  argument
136 	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);  in phy_axg_mipi_pcie_analog_configure()
139 	ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);  in phy_axg_mipi_pcie_analog_configure()
143 	memcpy(&priv->config, opts, sizeof(priv->config));  in phy_axg_mipi_pcie_analog_configure()
145 	priv->dsi_configured = true;  in phy_axg_mipi_pcie_analog_configure()
147 	/* If PHY was already powered on, setup the DSI analog part */  in phy_axg_mipi_pcie_analog_configure()
148 	if (priv->powered) {  in phy_axg_mipi_pcie_analog_configure()
150 		if (priv->dsi_enabled)  in phy_axg_mipi_pcie_analog_configure()
161 static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy)  in phy_axg_mipi_pcie_analog_power_on()  argument
163 	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);  in phy_axg_mipi_pcie_analog_power_on()
167 	if (priv->dsi_configured)  in phy_axg_mipi_pcie_analog_power_on()
170 	priv->powered = true;  in phy_axg_mipi_pcie_analog_power_on()
175 static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy)  in phy_axg_mipi_pcie_analog_power_off()  argument
177 	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);  in phy_axg_mipi_pcie_analog_power_off()
181 	if (priv->dsi_enabled)  in phy_axg_mipi_pcie_analog_power_off()
184 	priv->powered = false;  in phy_axg_mipi_pcie_analog_power_off()
198 	struct phy_provider *phy;  in phy_axg_mipi_pcie_analog_probe()  local
199 	struct device *dev = &pdev->dev;  in phy_axg_mipi_pcie_analog_probe()
201 	struct device_node *np = dev->of_node, *parent_np;  in phy_axg_mipi_pcie_analog_probe()
207 		return -ENOMEM;  in phy_axg_mipi_pcie_analog_probe()
210 	parent_np = of_get_parent(dev->of_node);  in phy_axg_mipi_pcie_analog_probe()
219 	priv->regmap = map;  in phy_axg_mipi_pcie_analog_probe()
221 	priv->phy = devm_phy_create(dev, np, &phy_axg_mipi_pcie_analog_ops);  in phy_axg_mipi_pcie_analog_probe()
222 	if (IS_ERR(priv->phy)) {  in phy_axg_mipi_pcie_analog_probe()
223 		ret = PTR_ERR(priv->phy);  in phy_axg_mipi_pcie_analog_probe()
224 		if (ret != -EPROBE_DEFER)  in phy_axg_mipi_pcie_analog_probe()
225 			dev_err(dev, "failed to create PHY\n");  in phy_axg_mipi_pcie_analog_probe()
229 	phy_set_drvdata(priv->phy, priv);  in phy_axg_mipi_pcie_analog_probe()
232 	phy = devm_of_phy_provider_register(dev, of_phy_simple_xlate);  in phy_axg_mipi_pcie_analog_probe()
234 	return PTR_ERR_OR_ZERO(phy);  in phy_axg_mipi_pcie_analog_probe()
239 		.compatible = "amlogic,axg-mipi-pcie-analog-phy",
248 		.name = "phy-axg-mipi-pcie-analog",
255 MODULE_DESCRIPTION("Amlogic AXG MIPI + PCIE analog PHY driver");