drivers/pinctrl/pinctrl-loongson2.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/pinctrl-loongson2.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/pinctrl-loongson2.c
Extension
.c
Size
9007 bytes
Lines
313
Domain
Driver Families
Bucket
drivers/pinctrl
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 loongson2_pinctrl {
	struct device *dev;
	struct pinctrl_dev *pcdev;
	struct pinctrl_desc desc;
	struct device_node *of_node;
	spinlock_t lock;
	void __iomem *reg_base;
};

struct loongson2_pmx_group {
	struct pingroup grp;
	unsigned int reg;
	unsigned int bit;
};

struct loongson2_pmx_func {
	const char *name;
	const char * const *groups;
	unsigned int num_groups;
};

#define LOONGSON2_PIN(x) PINCTRL_PIN(x, "gpio"#x)
static const struct pinctrl_pin_desc loongson2_pctrl_pins[] = {
	LOONGSON2_PIN(0),  LOONGSON2_PIN(1),  LOONGSON2_PIN(2),  LOONGSON2_PIN(3),
	LOONGSON2_PIN(4),  LOONGSON2_PIN(5),  LOONGSON2_PIN(6),  LOONGSON2_PIN(7),
	LOONGSON2_PIN(8),  LOONGSON2_PIN(9),  LOONGSON2_PIN(10), LOONGSON2_PIN(11),
	LOONGSON2_PIN(12), LOONGSON2_PIN(13), LOONGSON2_PIN(14),
	LOONGSON2_PIN(16), LOONGSON2_PIN(17), LOONGSON2_PIN(18), LOONGSON2_PIN(19),
	LOONGSON2_PIN(20), LOONGSON2_PIN(21), LOONGSON2_PIN(22), LOONGSON2_PIN(23),
	LOONGSON2_PIN(24), LOONGSON2_PIN(25), LOONGSON2_PIN(26), LOONGSON2_PIN(27),
	LOONGSON2_PIN(28), LOONGSON2_PIN(29), LOONGSON2_PIN(30),
	LOONGSON2_PIN(32), LOONGSON2_PIN(33), LOONGSON2_PIN(34), LOONGSON2_PIN(35),
	LOONGSON2_PIN(36), LOONGSON2_PIN(37), LOONGSON2_PIN(38), LOONGSON2_PIN(39),
	LOONGSON2_PIN(40), LOONGSON2_PIN(41),
	LOONGSON2_PIN(44), LOONGSON2_PIN(45), LOONGSON2_PIN(46), LOONGSON2_PIN(47),
	LOONGSON2_PIN(48), LOONGSON2_PIN(49), LOONGSON2_PIN(50), LOONGSON2_PIN(51),
	LOONGSON2_PIN(52), LOONGSON2_PIN(53), LOONGSON2_PIN(54), LOONGSON2_PIN(55),
	LOONGSON2_PIN(56), LOONGSON2_PIN(57), LOONGSON2_PIN(58), LOONGSON2_PIN(59),
	LOONGSON2_PIN(60), LOONGSON2_PIN(61), LOONGSON2_PIN(62), LOONGSON2_PIN(63),
};

static const unsigned int gpio_pins[] = {0, 1, 2, 3, 4, 5, 6, 7,
					 8, 9, 10, 11, 12, 13, 14,
					 16, 17, 18, 19, 20, 21, 22, 23,
					 24, 25, 26, 27, 28, 29, 30,
					 32, 33, 34, 35, 36, 37, 38, 39,
					 40,         43, 44, 45, 46, 47,
					 48, 49, 50, 51, 52, 53, 46, 55,
					 56, 57, 58, 59, 60, 61, 62, 63};
static const unsigned int sdio_pins[] = {36, 37, 38, 39, 40, 41};
static const unsigned int can1_pins[] = {34, 35};
static const unsigned int can0_pins[] = {32, 33};
static const unsigned int pwm3_pins[] = {23};
static const unsigned int pwm2_pins[] = {22};
static const unsigned int pwm1_pins[] = {21};
static const unsigned int pwm0_pins[] = {20};
static const unsigned int i2c1_pins[] = {18, 19};
static const unsigned int i2c0_pins[] = {16, 17};
static const unsigned int nand_pins[] = {44, 45, 46, 47, 48, 49, 50, 51,
					 52, 53, 54, 55, 56, 57, 58, 59, 60,
					 61, 62, 63};
static const unsigned int sata_led_pins[] = {14};
static const unsigned int i2s_pins[]    = {24, 25, 26, 27, 28};
static const unsigned int hda_pins[]    = {24, 25, 26, 27, 28, 29, 30};

static struct loongson2_pmx_group loongson2_pmx_groups[] = {
	PMX_GROUP(gpio, 0x0, 64),
	PMX_GROUP(sdio, 0x0, 20),
	PMX_GROUP(can1, 0x0, 17),
	PMX_GROUP(can0, 0x0, 16),
	PMX_GROUP(pwm3, 0x0, 15),
	PMX_GROUP(pwm2, 0x0, 14),
	PMX_GROUP(pwm1, 0x0, 13),
	PMX_GROUP(pwm0, 0x0, 12),
	PMX_GROUP(i2c1, 0x0, 11),
	PMX_GROUP(i2c0, 0x0, 10),
	PMX_GROUP(nand, 0x0, 9),
	PMX_GROUP(sata_led, 0x0, 8),
	PMX_GROUP(i2s, 0x0, 6),
	PMX_GROUP(hda, 0x0, 4),
};

SPECIFIC_GROUP(sdio);
SPECIFIC_GROUP(can1);
SPECIFIC_GROUP(can0);
SPECIFIC_GROUP(pwm3);
SPECIFIC_GROUP(pwm2);
SPECIFIC_GROUP(pwm1);
SPECIFIC_GROUP(pwm0);
SPECIFIC_GROUP(i2c1);

Annotation

Implementation Notes