drivers/pinctrl/renesas/pfc-r8a7740.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/renesas/pfc-r8a7740.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/renesas/pfc-r8a7740.c
Extension
.c
Size
109894 bytes
Lines
3550
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 r8a7740_portcr_group {
	unsigned int end_pin;
	unsigned int offset;
};

static const struct r8a7740_portcr_group r8a7740_portcr_offsets[] = {
	{ 83, 0x0000 }, { 114, 0x1000 }, { 209, 0x2000 }, { 211, 0x3000 },
};

static int r8a7740_pin_to_portcr(unsigned int pin)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(r8a7740_portcr_offsets); ++i) {
		const struct r8a7740_portcr_group *group =
			&r8a7740_portcr_offsets[i];

		if (pin <= group->end_pin)
			return group->offset + pin;
	}

	return -1;
}

static const struct sh_pfc_soc_operations r8a7740_pfc_ops = {
	.get_bias = rmobile_pinmux_get_bias,
	.set_bias = rmobile_pinmux_set_bias,
	.pin_to_portcr = r8a7740_pin_to_portcr,
};

const struct sh_pfc_soc_info r8a7740_pinmux_info = {
	.name		= "r8a7740_pfc",
	.ops		= &r8a7740_pfc_ops,

	.input		= { PINMUX_INPUT_BEGIN,
			    PINMUX_INPUT_END },
	.output		= { PINMUX_OUTPUT_BEGIN,
			    PINMUX_OUTPUT_END },
	.function	= { PINMUX_FUNCTION_BEGIN,
			    PINMUX_FUNCTION_END },

	.pins		= pinmux_pins,
	.nr_pins	= ARRAY_SIZE(pinmux_pins),
	.groups		= pinmux_groups,
	.nr_groups	= ARRAY_SIZE(pinmux_groups),
	.functions	= pinmux_functions,
	.nr_functions	= ARRAY_SIZE(pinmux_functions),

	.cfg_regs	= pinmux_config_regs,
	.data_regs	= pinmux_data_regs,

	.pinmux_data	= pinmux_data,
	.pinmux_data_size = ARRAY_SIZE(pinmux_data),

	.gpio_irq	= pinmux_irqs,
	.gpio_irq_size	= ARRAY_SIZE(pinmux_irqs),
};

Annotation

Implementation Notes