drivers/pinctrl/pinctrl-rk805.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/pinctrl-rk805.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/pinctrl-rk805.c
Extension
.c
Size
17520 bytes
Lines
703
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 rk805_pin_function {
	const char *name;
	const char *const *groups;
	unsigned int ngroups;
	int mux_option;
};

struct rk805_pin_group {
	const char *name;
	const unsigned int pins[1];
	unsigned int npins;
};

/*
 * @reg: gpio setting register;
 * @fun_reg: functions select register;
 * @fun_mask: functions select mask value, when set is gpio;
 * @dir_mask: input or output mask value, when set is output, otherwise input;
 * @val_mask: gpio set value, when set is level high, otherwise low;
 *
 * Different PMIC has different pin features, belowing 3 mask members are not
 * all necessary for every PMIC. For example, RK805 has 2 pins that can be used
 * as output only GPIOs, so func_mask and dir_mask are not needed. RK816 has 1
 * pin that can be used as TS/GPIO, so fun_mask, dir_mask and val_mask are all
 * necessary.
 */
struct rk805_pin_config {
	u8 reg;
	u8 fun_reg;
	u8 fun_msk;
	u8 dir_msk;
	u8 val_msk;
};

struct rk805_pctrl_info {
	struct rk808 *rk808;
	struct device *dev;
	struct pinctrl_dev *pctl;
	struct gpio_chip gpio_chip;
	struct pinctrl_desc pinctrl_desc;
	const struct rk805_pin_function *functions;
	unsigned int num_functions;
	const struct rk805_pin_group *groups;
	int num_pin_groups;
	const struct pinctrl_pin_desc *pins;
	unsigned int num_pins;
	const struct rk805_pin_config *pin_cfg;
};

enum rk805_pinmux_option {
	RK805_PINMUX_GPIO,
};

enum rk806_pinmux_option {
	RK806_PINMUX_FUN0 = 0,
	RK806_PINMUX_FUN1,
	RK806_PINMUX_FUN2,
	RK806_PINMUX_FUN3,
	RK806_PINMUX_FUN4,
	RK806_PINMUX_FUN5,
};

enum rk816_pinmux_option {
	RK816_PINMUX_THERMISTOR,
	RK816_PINMUX_GPIO,
};

enum {
	RK805_GPIO0,
	RK805_GPIO1,
};

enum {
	RK806_GPIO_DVS1,
	RK806_GPIO_DVS2,
	RK806_GPIO_DVS3
};

enum {
	RK816_GPIO0,
};

static const char *const rk805_gpio_groups[] = {
	"gpio0",
	"gpio1",
};

static const char *const rk806_gpio_groups[] = {
	"gpio_pwrctrl1",
	"gpio_pwrctrl2",

Annotation

Implementation Notes