drivers/phy/qualcomm/phy-qcom-m31.c

File Facts

System

Linux kernel

Corpus path

drivers/phy/qualcomm/phy-qcom-m31.c

Extension

.c

Size

7358 bytes

Lines

349

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.

• 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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/clk.h
• linux/delay.h
• linux/err.h
• linux/io.h
• linux/kernel.h
• linux/module.h
• linux/of.h
• linux/phy/phy.h
• linux/platform_device.h
• linux/reset.h
• linux/slab.h

Detected Declarations

• struct m31_phy_regs
• struct m31_priv_data
• struct m31usb_phy
• function m31usb_phy_init
• function m31usb_phy_shutdown
• function m31usb_phy_probe

Annotated Snippet

struct m31_phy_regs {
	u32 off;
	u32 val;
	u32 delay;
};

struct m31_priv_data {
	bool				ulpi_mode;
	const struct m31_phy_regs	*regs;
	unsigned int			nregs;
};

static const struct m31_phy_regs m31_ipq5018_regs[] = {
	{
		.off = USB_PHY_CFG0,
		.val = UTMI_PHY_OVERRIDE_EN
	},
	{
		.off = USB_PHY_UTMI_CTRL5,
		.val = POR_EN,
		.delay = 15
	},
	{
		.off = USB_PHY_FSEL_SEL,
		.val = FREQ_SEL
	},
	{
		.off = USB_PHY_HS_PHY_CTRL_COMMON0,
		.val = COMMONONN | FSEL | RETENABLEN
	},
	{
		.off = USB_PHY_REFCLK_CTRL,
		.val = CLKCORE
	},
	{
		.off = USB_PHY_UTMI_CTRL5,
		.val = POR_EN
	},
	{
		.off = USB_PHY_HS_PHY_CTRL2,
		.val = USB2_SUSPEND_N_SEL | USB2_SUSPEND_N | USB2_UTMI_CLK_EN
	},
	{
		.off = USB_PHY_UTMI_CTRL5,
		.val = 0x0
	},
	{
		.off = USB_PHY_HS_PHY_CTRL2,
		.val = USB2_SUSPEND_N | USB2_UTMI_CLK_EN
	},
	{
		.off = USB_PHY_CFG0,
		.val = 0x0
	},
};

static struct m31_phy_regs m31_ipq5332_regs[] = {
	{
		USB_PHY_CFG0,
		UTMI_PHY_OVERRIDE_EN,
		0
	},
	{
		USB_PHY_UTMI_CTRL5,
		POR_EN,
		15
	},
	{
		USB_PHY_FSEL_SEL,
		FREQ_SEL,
		0
	},
	{
		USB_PHY_HS_PHY_CTRL_COMMON0,
		COMMONONN | FREQ_24MHZ | RETENABLEN,
		0
	},
	{
		USB_PHY_UTMI_CTRL5,
		POR_EN,
		0
	},
	{
		USB_PHY_HS_PHY_CTRL2,
		USB2_SUSPEND_N_SEL | USB2_SUSPEND_N | USB2_UTMI_CLK_EN,
		0
	},
	{
		USB2PHY_USB_PHY_M31_XCFGI_11,
		XCFG_COARSE_TUNE_NUM  | XCFG_FINE_TUNE_NUM,

Annotation

• Immediate include surface: `linux/clk.h`, `linux/delay.h`, `linux/err.h`, `linux/io.h`, `linux/kernel.h`, `linux/module.h`, `linux/of.h`, `linux/phy/phy.h`.
• Detected declarations: `struct m31_phy_regs`, `struct m31_priv_data`, `struct m31usb_phy`, `function m31usb_phy_init`, `function m31usb_phy_shutdown`, `function m31usb_phy_probe`.
• Atlas domain: Driver Families / drivers/phy.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.