drivers/pinctrl/bcm/pinctrl-bcm2835.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/bcm/pinctrl-bcm2835.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/bcm/pinctrl-bcm2835.c
Extension
.c
Size
37705 bytes
Lines
1459
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 bcm2835_pinctrl {
	struct device *dev;
	void __iomem *base;
	int *wake_irq;

	/* note: locking assumes each bank will have its own unsigned long */
	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
	unsigned int irq_type[BCM2711_NUM_GPIOS];

	struct pinctrl_dev *pctl_dev;
	struct gpio_chip gpio_chip;
	struct pinctrl_desc pctl_desc;
	struct pinctrl_gpio_range gpio_range;

	raw_spinlock_t irq_lock[BCM2835_NUM_BANKS];
	/* Protect FSEL registers */
	spinlock_t fsel_lock;
};

/* pins are just named GPIO0..GPIO53 */
#define BCM2835_GPIO_PIN(a) PINCTRL_PIN(a, "gpio" #a)
static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
	BCM2835_GPIO_PIN(0),
	BCM2835_GPIO_PIN(1),
	BCM2835_GPIO_PIN(2),
	BCM2835_GPIO_PIN(3),
	BCM2835_GPIO_PIN(4),
	BCM2835_GPIO_PIN(5),
	BCM2835_GPIO_PIN(6),
	BCM2835_GPIO_PIN(7),
	BCM2835_GPIO_PIN(8),
	BCM2835_GPIO_PIN(9),
	BCM2835_GPIO_PIN(10),
	BCM2835_GPIO_PIN(11),
	BCM2835_GPIO_PIN(12),
	BCM2835_GPIO_PIN(13),
	BCM2835_GPIO_PIN(14),
	BCM2835_GPIO_PIN(15),
	BCM2835_GPIO_PIN(16),
	BCM2835_GPIO_PIN(17),
	BCM2835_GPIO_PIN(18),
	BCM2835_GPIO_PIN(19),
	BCM2835_GPIO_PIN(20),
	BCM2835_GPIO_PIN(21),
	BCM2835_GPIO_PIN(22),
	BCM2835_GPIO_PIN(23),
	BCM2835_GPIO_PIN(24),
	BCM2835_GPIO_PIN(25),
	BCM2835_GPIO_PIN(26),
	BCM2835_GPIO_PIN(27),
	BCM2835_GPIO_PIN(28),
	BCM2835_GPIO_PIN(29),
	BCM2835_GPIO_PIN(30),
	BCM2835_GPIO_PIN(31),
	BCM2835_GPIO_PIN(32),
	BCM2835_GPIO_PIN(33),
	BCM2835_GPIO_PIN(34),
	BCM2835_GPIO_PIN(35),
	BCM2835_GPIO_PIN(36),
	BCM2835_GPIO_PIN(37),
	BCM2835_GPIO_PIN(38),
	BCM2835_GPIO_PIN(39),
	BCM2835_GPIO_PIN(40),
	BCM2835_GPIO_PIN(41),
	BCM2835_GPIO_PIN(42),
	BCM2835_GPIO_PIN(43),
	BCM2835_GPIO_PIN(44),
	BCM2835_GPIO_PIN(45),
	BCM2835_GPIO_PIN(46),
	BCM2835_GPIO_PIN(47),
	BCM2835_GPIO_PIN(48),
	BCM2835_GPIO_PIN(49),
	BCM2835_GPIO_PIN(50),
	BCM2835_GPIO_PIN(51),
	BCM2835_GPIO_PIN(52),
	BCM2835_GPIO_PIN(53),
	BCM2835_GPIO_PIN(54),
	BCM2835_GPIO_PIN(55),
	BCM2835_GPIO_PIN(56),
	BCM2835_GPIO_PIN(57),
};

/* one pin per group */
static const char * const bcm2835_gpio_groups[] = {
	"gpio0",
	"gpio1",
	"gpio2",
	"gpio3",
	"gpio4",
	"gpio5",

Annotation

Implementation Notes