drivers/firmware/arm_scmi/pinctrl.c

Source file repositories/reference/linux-study-clean/drivers/firmware/arm_scmi/pinctrl.c

File Facts

System
Linux kernel
Corpus path
drivers/firmware/arm_scmi/pinctrl.c
Extension
.c
Size
21369 bytes
Lines
900
Domain
Driver Families
Bucket
drivers/firmware
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 scmi_msg_settings_conf {
	__le32 identifier;
	__le32 function_id;
	__le32 attributes;
	__le32 configs[];
};

struct scmi_msg_settings_get {
	__le32 identifier;
	__le32 attributes;
};

struct scmi_resp_settings_get {
	__le32 function_selected;
	__le32 num_configs;
	__le32 configs[];
};

struct scmi_msg_pinctrl_protocol_attributes {
	__le32 attributes_low;
	__le32 attributes_high;
};

struct scmi_msg_pinctrl_attributes {
	__le32 identifier;
	__le32 flags;
};

struct scmi_resp_pinctrl_attributes {
	__le32 attributes;
	u8 name[SCMI_SHORT_NAME_MAX_SIZE];
};

struct scmi_msg_pinctrl_list_assoc {
	__le32 identifier;
	__le32 flags;
	__le32 index;
};

struct scmi_resp_pinctrl_list_assoc {
	__le32 flags;
	__le16 array[];
};

struct scmi_msg_request {
	__le32 identifier;
	__le32 flags;
};

struct scmi_group_info {
	char name[SCMI_MAX_STR_SIZE];
	bool present;
	u32 *group_pins;
	u32 nr_pins;
};

struct scmi_function_info {
	char name[SCMI_MAX_STR_SIZE];
	bool present;
	u32 *groups;
	u32 nr_groups;
};

struct scmi_pin_info {
	char name[SCMI_MAX_STR_SIZE];
	bool present;
};

struct scmi_pinctrl_info {
	int nr_groups;
	int nr_functions;
	int nr_pins;
	struct scmi_group_info *groups;
	struct scmi_function_info *functions;
	struct scmi_pin_info *pins;
};

static int scmi_pinctrl_attributes_get(const struct scmi_protocol_handle *ph,
				       struct scmi_pinctrl_info *pi)
{
	int ret;
	struct scmi_xfer *t;
	struct scmi_msg_pinctrl_protocol_attributes *attr;

	ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, sizeof(*attr), &t);
	if (ret)
		return ret;

	attr = t->rx.buf;

Annotation

Implementation Notes