drivers/phy/amlogic/phy-meson-g12a-mipi-dphy-analog.c

Source file repositories/reference/linux-study-clean/drivers/phy/amlogic/phy-meson-g12a-mipi-dphy-analog.c

File Facts

System
Linux kernel
Corpus path
drivers/phy/amlogic/phy-meson-g12a-mipi-dphy-analog.c
Extension
.c
Size
4656 bytes
Lines
173
Domain
Driver Families
Bucket
drivers/phy
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct phy_g12a_mipi_dphy_analog_priv {
	struct phy *phy;
	struct regmap *regmap;
	struct phy_configure_opts_mipi_dphy config;
};

static int phy_g12a_mipi_dphy_analog_configure(struct phy *phy,
					       union phy_configure_opts *opts)
{
	struct phy_g12a_mipi_dphy_analog_priv *priv = phy_get_drvdata(phy);
	int ret;

	ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
	if (ret)
		return ret;

	memcpy(&priv->config, opts, sizeof(priv->config));

	return 0;
}

static int phy_g12a_mipi_dphy_analog_power_on(struct phy *phy)
{
	struct phy_g12a_mipi_dphy_analog_priv *priv = phy_get_drvdata(phy);
	unsigned int reg;

	regmap_write(priv->regmap, HHI_MIPI_CNTL0,
		     FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL0, 0x8) |
		     FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0xa487));

	regmap_write(priv->regmap, HHI_MIPI_CNTL1,
		     FIELD_PREP(HHI_MIPI_CNTL2_DIF_REF_CTL2, 0x2e) |
		     HHI_MIPI_CNTL1_BANDGAP);

	regmap_write(priv->regmap, HHI_MIPI_CNTL2,
		     FIELD_PREP(HHI_MIPI_CNTL2_DIF_TX_CTL0, 0x45a) |
		     FIELD_PREP(HHI_MIPI_CNTL2_DIF_TX_CTL1, 0x2680));

	reg = DSI_LANE_CLK;
	switch (priv->config.lanes) {
	case 4:
		reg |= DSI_LANE_3;
		fallthrough;
	case 3:
		reg |= DSI_LANE_2;
		fallthrough;
	case 2:
		reg |= DSI_LANE_1;
		fallthrough;
	case 1:
		reg |= DSI_LANE_0;
		break;
	default:
		reg = 0;
	}

	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2,
			   HHI_MIPI_CNTL2_CH_EN,
			   FIELD_PREP(HHI_MIPI_CNTL2_CH_EN, reg));

	return 0;
}

static int phy_g12a_mipi_dphy_analog_power_off(struct phy *phy)
{
	struct phy_g12a_mipi_dphy_analog_priv *priv = phy_get_drvdata(phy);

	regmap_write(priv->regmap, HHI_MIPI_CNTL0, 0);
	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0);
	regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0);

	return 0;
}

static const struct phy_ops phy_g12a_mipi_dphy_analog_ops = {
	.configure = phy_g12a_mipi_dphy_analog_configure,
	.power_on = phy_g12a_mipi_dphy_analog_power_on,
	.power_off = phy_g12a_mipi_dphy_analog_power_off,
	.owner = THIS_MODULE,
};

static int phy_g12a_mipi_dphy_analog_probe(struct platform_device *pdev)
{
	struct phy_provider *phy;
	struct device *dev = &pdev->dev;
	struct phy_g12a_mipi_dphy_analog_priv *priv;
	struct device_node *np = dev->of_node, *parent_np;
	struct regmap *map;

	priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);

Annotation

Implementation Notes