drivers/platform/mellanox/nvsw-sn2201.c

Source file repositories/reference/linux-study-clean/drivers/platform/mellanox/nvsw-sn2201.c

File Facts

System: Linux kernel
Corpus path: drivers/platform/mellanox/nvsw-sn2201.c
Extension: .c
Size: 39192 bytes
Lines: 1372
Domain: Driver Families
Bucket: drivers/platform
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/device.h
linux/dmi.h
linux/i2c.h
linux/interrupt.h
linux/irq.h
linux/module.h
linux/platform_data/mlxcpld.h
linux/platform_data/mlxreg.h
linux/platform_device.h
linux/regmap.h

Detected Declarations

struct nvsw_sn2201
function nvsw_sn2201_writeable_reg
function nvsw_sn2201_readable_reg
function nvsw_sn2201_volatile_reg
function nvsw_sn2201_create_static_devices
function nvsw_sn2201_destroy_static_devices
function nvsw_sn2201_config_post_init
function nvsw_sn2201_config_init
function nvsw_sn2201_config_exit
function nvsw_sn2201_i2c_completion_notify
function nvsw_sn2201_config_pre_init
function nvsw_sn2201_probe
function nvsw_sn2201_remove

Annotated Snippet

struct nvsw_sn2201 {
	struct device *dev;
	struct mlxreg_core_platform_data *io_data;
	struct mlxreg_core_platform_data *led_data;
	struct mlxreg_core_platform_data *wd_data;
	struct mlxreg_core_hotplug_platform_data *hotplug_data;
	struct mlxreg_core_hotplug_platform_data *i2c_data;
	struct platform_device *led;
	struct platform_device *wd;
	struct platform_device *io_regs;
	struct platform_device *pdev_hotplug;
	struct platform_device *pdev_i2c;
	struct mlxreg_hotplug_device *sn2201_devs;
	int sn2201_devs_num;
	struct mlxreg_hotplug_device *main_mux_devs;
	int main_mux_devs_num;
	struct mlxreg_hotplug_device *cpld_devs;
	int cpld_devs_num;
	int main_mux_deferred_nr;
	bool ext_pwr_source;
};

static bool nvsw_sn2201_writeable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case NVSW_SN2201_PSU_CTRL_OFFSET:
	case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
	case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
	case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
	case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
	case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
	case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
	case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
	case NVSW_SN2201_SYS_INT_MASK_OFFSET:
	case NVSW_SN2201_ASIC_EVENT_OFFSET:
	case NVSW_SN2201_ASIC_MAKS_OFFSET:
	case NVSW_SN2201_THML_EVENT_OFFSET:
	case NVSW_SN2201_THML_MASK_OFFSET:
	case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
	case NVSW_SN2201_PS_ALT_MASK_OFFSET:
	case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
	case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
	case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
	case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
	case NVSW_SN2201_RST_SW_CTRL_OFFSET:
	case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
	case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
	case NVSW_SN2201_WD_TMR_OFFSET_LSB:
	case NVSW_SN2201_WD_TMR_OFFSET_MSB:
	case NVSW_SN2201_WD_ACT_OFFSET:
	case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
	case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
		return true;
	}
	return false;
}

static bool nvsw_sn2201_readable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case NVSW_SN2201_HW_VER_ID_OFFSET:
	case NVSW_SN2201_BOARD_ID_OFFSET:
	case NVSW_SN2201_CPLD_VER_OFFSET:
	case NVSW_SN2201_CPLD_MVER_OFFSET:
	case NVSW_SN2201_CPLD_ID_OFFSET:
	case NVSW_SN2201_CPLD_PN_OFFSET:
	case NVSW_SN2201_CPLD_PN1_OFFSET:
	case NVSW_SN2201_PSU_CTRL_OFFSET:
	case NVSW_SN2201_QSFP28_STATUS_OFFSET:
	case NVSW_SN2201_QSFP28_INT_STATUS_OFFSET:
	case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
	case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
	case NVSW_SN2201_SYS_STATUS_OFFSET:
	case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
	case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
	case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
	case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
	case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
	case NVSW_SN2201_RST_CAUSE1_OFFSET:
	case NVSW_SN2201_RST_CAUSE2_OFFSET:
	case NVSW_SN2201_SYS_INT_STATUS_OFFSET:
	case NVSW_SN2201_SYS_INT_MASK_OFFSET:
	case NVSW_SN2201_ASIC_STATUS_OFFSET:
	case NVSW_SN2201_ASIC_EVENT_OFFSET:
	case NVSW_SN2201_ASIC_MAKS_OFFSET:
	case NVSW_SN2201_THML_STATUS_OFFSET:
	case NVSW_SN2201_THML_EVENT_OFFSET:
	case NVSW_SN2201_THML_MASK_OFFSET:
	case NVSW_SN2201_PS_ALT_STATUS_OFFSET:
	case NVSW_SN2201_PS_ALT_EVENT_OFFSET:

Annotation

Immediate include surface: `linux/device.h`, `linux/dmi.h`, `linux/i2c.h`, `linux/interrupt.h`, `linux/irq.h`, `linux/module.h`, `linux/platform_data/mlxcpld.h`, `linux/platform_data/mlxreg.h`.
Detected declarations: `struct nvsw_sn2201`, `function nvsw_sn2201_writeable_reg`, `function nvsw_sn2201_readable_reg`, `function nvsw_sn2201_volatile_reg`, `function nvsw_sn2201_create_static_devices`, `function nvsw_sn2201_destroy_static_devices`, `function nvsw_sn2201_config_post_init`, `function nvsw_sn2201_config_init`, `function nvsw_sn2201_config_exit`, `function nvsw_sn2201_i2c_completion_notify`.
Atlas domain: Driver Families / drivers/platform.
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.