drivers/reset/reset-zynqmp.c

Source file repositories/reference/linux-study-clean/drivers/reset/reset-zynqmp.c

File Facts

System
Linux kernel
Corpus path
drivers/reset/reset-zynqmp.c
Extension
.c
Size
3734 bytes
Lines
146
Domain
Driver Families
Bucket
drivers/reset
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 zynqmp_reset_soc_data {
	u32 reset_id;
	u32 num_resets;
};

struct zynqmp_reset_data {
	struct reset_controller_dev rcdev;
	const struct zynqmp_reset_soc_data *data;
};

static inline struct zynqmp_reset_data *
to_zynqmp_reset_data(struct reset_controller_dev *rcdev)
{
	return container_of(rcdev, struct zynqmp_reset_data, rcdev);
}

static int zynqmp_reset_assert(struct reset_controller_dev *rcdev,
			       unsigned long id)
{
	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);

	return zynqmp_pm_reset_assert(priv->data->reset_id + id,
				      PM_RESET_ACTION_ASSERT);
}

static int zynqmp_reset_deassert(struct reset_controller_dev *rcdev,
				 unsigned long id)
{
	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);

	return zynqmp_pm_reset_assert(priv->data->reset_id + id,
				      PM_RESET_ACTION_RELEASE);
}

static int zynqmp_reset_status(struct reset_controller_dev *rcdev,
			       unsigned long id)
{
	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);
	int err;
	u32 val;

	err = zynqmp_pm_reset_get_status(priv->data->reset_id + id, &val);
	if (err)
		return err;

	return val;
}

static int zynqmp_reset_reset(struct reset_controller_dev *rcdev,
			      unsigned long id)
{
	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);

	return zynqmp_pm_reset_assert(priv->data->reset_id + id,
				      PM_RESET_ACTION_PULSE);
}

static int zynqmp_reset_of_xlate(struct reset_controller_dev *rcdev,
				 const struct of_phandle_args *reset_spec)
{
	return reset_spec->args[0];
}

static const struct zynqmp_reset_soc_data zynqmp_reset_data = {
	.reset_id = ZYNQMP_RESET_ID,
	.num_resets = ZYNQMP_NR_RESETS,
};

static const struct zynqmp_reset_soc_data versal_reset_data = {
	.reset_id = 0,
	.num_resets = VERSAL_NR_RESETS,
};

static const struct zynqmp_reset_soc_data versal_net_reset_data = {
	.reset_id = 0,
	.num_resets = VERSAL_NET_NR_RESETS,
};

static const struct reset_control_ops zynqmp_reset_ops = {
	.reset = zynqmp_reset_reset,
	.assert = zynqmp_reset_assert,
	.deassert = zynqmp_reset_deassert,
	.status = zynqmp_reset_status,
};

static int zynqmp_reset_probe(struct platform_device *pdev)
{
	struct zynqmp_reset_data *priv;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);

Annotation

Implementation Notes