drivers/power/sequencing/pwrseq-pcie-m2.c

Source file repositories/reference/linux-study-clean/drivers/power/sequencing/pwrseq-pcie-m2.c

File Facts

System
Linux kernel
Corpus path
drivers/power/sequencing/pwrseq-pcie-m2.c
Extension
.c
Size
16125 bytes
Lines
607
Domain
Driver Families
Bucket
drivers/power
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 pwrseq_pci_dev {
	struct serdev_device *serdev;
	struct of_changeset *ocs;
	struct pci_dev *pdev;
	struct list_head list;
};

struct pwrseq_pcie_m2_pdata {
	const struct pwrseq_target_data **targets;
};

struct pwrseq_pcie_m2_ctx {
	struct pwrseq_device *pwrseq;
	struct device_node *of_node;
	const struct pwrseq_pcie_m2_pdata *pdata;
	struct regulator_bulk_data *regs;
	size_t num_vregs;
	struct notifier_block nb;
	struct gpio_desc *w_disable1_gpio;
	struct gpio_desc *w_disable2_gpio;
	struct device *dev;
	struct list_head pci_devices;
	struct mutex list_lock;
};

static int pwrseq_pcie_m2_vregs_enable(struct pwrseq_device *pwrseq)
{
	struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq);

	return regulator_bulk_enable(ctx->num_vregs, ctx->regs);
}

static int pwrseq_pcie_m2_vregs_disable(struct pwrseq_device *pwrseq)
{
	struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq);

	return regulator_bulk_disable(ctx->num_vregs, ctx->regs);
}

static const struct pwrseq_unit_data pwrseq_pcie_m2_vregs_unit_data = {
	.name = "regulators-enable",
	.enable = pwrseq_pcie_m2_vregs_enable,
	.disable = pwrseq_pcie_m2_vregs_disable,
};

static const struct pwrseq_unit_data *pwrseq_pcie_m2_unit_deps[] = {
	&pwrseq_pcie_m2_vregs_unit_data,
	NULL
};

static int pwrseq_pci_m2_e_uart_enable(struct pwrseq_device *pwrseq)
{
	struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq);

	return gpiod_set_value_cansleep(ctx->w_disable2_gpio, 0);
}

static int pwrseq_pci_m2_e_uart_disable(struct pwrseq_device *pwrseq)
{
	struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq);

	return gpiod_set_value_cansleep(ctx->w_disable2_gpio, 1);
}

static const struct pwrseq_unit_data pwrseq_pcie_m2_e_uart_unit_data = {
	.name = "uart-enable",
	.deps = pwrseq_pcie_m2_unit_deps,
	.enable = pwrseq_pci_m2_e_uart_enable,
	.disable = pwrseq_pci_m2_e_uart_disable,
};

static int pwrseq_pci_m2_e_pcie_enable(struct pwrseq_device *pwrseq)
{
	struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq);

	return gpiod_set_value_cansleep(ctx->w_disable1_gpio, 0);
}

static int pwrseq_pci_m2_e_pcie_disable(struct pwrseq_device *pwrseq)
{
	struct pwrseq_pcie_m2_ctx *ctx = pwrseq_device_get_drvdata(pwrseq);

	return gpiod_set_value_cansleep(ctx->w_disable1_gpio, 1);
}

static const struct pwrseq_unit_data pwrseq_pcie_m2_e_pcie_unit_data = {
	.name = "pcie-enable",
	.deps = pwrseq_pcie_m2_unit_deps,
	.enable = pwrseq_pci_m2_e_pcie_enable,
	.disable = pwrseq_pci_m2_e_pcie_disable,

Annotation

Implementation Notes