drivers/pinctrl/pinctrl-lpc18xx.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/pinctrl-lpc18xx.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/pinctrl-lpc18xx.c
Extension
.c
Size
43110 bytes
Lines
1383
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 lpc18xx_pmx_func {
	const char **groups;
	unsigned ngroups;
};

struct lpc18xx_scu_data {
	struct pinctrl_dev *pctl;
	void __iomem *base;
	struct clk *clk;
	struct lpc18xx_pmx_func func[FUNC_MAX];
};

struct lpc18xx_pin_caps {
	unsigned int offset;
	unsigned char functions[LPC18XX_SCU_FUNC_PER_PIN];
	unsigned char analog;
	unsigned char type;
};

/* Analog pins are required to have both bias and input disabled */
#define LPC18XX_SCU_ANALOG_PIN_CFG	0x10

/* Macros to maniupluate analog member in lpc18xx_pin_caps */
#define LPC18XX_ANALOG_PIN		BIT(7)
#define LPC18XX_ANALOG_ADC(a)		((a >> 5) & 0x3)
#define LPC18XX_ANALOG_BIT_MASK		0x1f
#define ADC0				(LPC18XX_ANALOG_PIN | (0x00 << 5))
#define ADC1				(LPC18XX_ANALOG_PIN | (0x01 << 5))
#define DAC				LPC18XX_ANALOG_PIN

#define LPC_P(port, pin, f0, f1, f2, f3, f4, f5, f6, f7, a, t)	\
static struct lpc18xx_pin_caps lpc18xx_pin_p##port##_##pin = {	\
	.offset = 0x##port * 32 * 4 + pin * 4,			\
	.functions = {						\
			FUNC_##f0, FUNC_##f1, FUNC_##f2,	\
			FUNC_##f3, FUNC_##f4, FUNC_##f5,	\
			FUNC_##f6, FUNC_##f7,			\
	},							\
	.analog = a,						\
	.type = TYPE_##t,					\
}

#define LPC_N(pname, off, f0, f1, f2, f3, f4, f5, f6, f7, a, t)	\
static struct lpc18xx_pin_caps lpc18xx_pin_##pname = {		\
	.offset = off,						\
	.functions = {						\
			FUNC_##f0, FUNC_##f1, FUNC_##f2,	\
			FUNC_##f3, FUNC_##f4, FUNC_##f5,	\
			FUNC_##f6, FUNC_##f7,			\
	},							\
	.analog = a,						\
	.type = TYPE_##t,					\
}


/* Pinmuxing table taken from data sheet */
/*    Pin    FUNC0  FUNC1  FUNC2  FUNC3   FUNC4   FUNC5   FUNC6    FUNC7 ANALOG TYPE */
LPC_P(0,0,   GPIO,  SSP1,  ENET,  SGPIO,      R,      R, I2S0_TX_WS,I2S1,     0, ND);
LPC_P(0,1,   GPIO,  SSP1,ENET_ALT,SGPIO,      R,      R,   ENET,    I2S1,     0, ND);
LPC_P(1,0,   GPIO,  CTIN,   EMC,      R,      R,   SSP0,  SGPIO,       R,     0, ND);
LPC_P(1,1,   GPIO, CTOUT,   EMC,  SGPIO,      R,   SSP0,      R,       R,     0, ND);
LPC_P(1,2,   GPIO, CTOUT,   EMC,  SGPIO,      R,   SSP0,      R,       R,     0, ND);
LPC_P(1,3,   GPIO, CTOUT, SGPIO,    EMC,   USB0,   SSP1,      R,   SDMMC,     0, ND);
LPC_P(1,4,   GPIO, CTOUT, SGPIO,    EMC,   USB0,   SSP1,      R,   SDMMC,     0, ND);
LPC_P(1,5,   GPIO, CTOUT,     R,    EMC,   USB0,   SSP1,  SGPIO,   SDMMC,     0, ND);
LPC_P(1,6,   GPIO,  CTIN,     R,    EMC,      R,      R,  SGPIO,   SDMMC,     0, ND);
LPC_P(1,7,   GPIO, UART1, CTOUT,    EMC,   USB0,      R,      R,       R,     0, ND);
LPC_P(1,8,   GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
LPC_P(1,9,   GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
LPC_P(1,10,  GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
LPC_P(1,11,  GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
LPC_P(1,12,  GPIO, UART1,     R,    EMC, TIMER0,      R,  SGPIO,   SDMMC,     0, ND);
LPC_P(1,13,  GPIO, UART1,     R,    EMC, TIMER0,      R,  SGPIO,   SDMMC,     0, ND);
LPC_P(1,14,  GPIO, UART1,     R,    EMC, TIMER0,      R,  SGPIO,       R,     0, ND);
LPC_P(1,15,  GPIO, UART2, SGPIO,   ENET, TIMER0,      R,      R,       R,     0, ND);
LPC_P(1,16,  GPIO, UART2, SGPIO,ENET_ALT,TIMER0,      R,      R,    ENET,     0, ND);
LPC_P(1,17,  GPIO, UART2,     R,   ENET, TIMER0,   CAN1,  SGPIO,       R,     0, HD);
LPC_P(1,18,  GPIO, UART2,     R,   ENET, TIMER0,   CAN1,  SGPIO,       R,     0, ND);
LPC_P(1,19,  ENET,  SSP1,     R,      R, CLKOUT,      R, I2S0_RX_MCLK,I2S1,   0, ND);
LPC_P(1,20,  GPIO,  SSP1,     R,   ENET, TIMER0,      R,  SGPIO,       R,     0, ND);
LPC_P(2,0,  SGPIO, UART0,   EMC,   USB0,   GPIO,      R, TIMER3,    ENET,     0, ND);
LPC_P(2,1,  SGPIO, UART0,   EMC,   USB0,   GPIO,      R, TIMER3,       R,     0, ND);
LPC_P(2,2,  SGPIO, UART0,   EMC,   USB0,   GPIO,   CTIN, TIMER3,       R,     0, ND);
LPC_P(2,3,  SGPIO,  I2C1, UART3,   CTIN,   GPIO,      R, TIMER3,    USB0,     0, HD);
LPC_P(2,4,  SGPIO,  I2C1, UART3,   CTIN,   GPIO,      R, TIMER3,    USB0,     0, HD);
LPC_P(2,5,  SGPIO,  CTIN,  USB1, ADCTRIG,  GPIO,      R, TIMER3,    USB0,     0, HD);
LPC_P(2,6,  SGPIO, UART0,   EMC,   USB0,   GPIO,   CTIN, TIMER3,       R,     0, ND);
LPC_P(2,7,   GPIO, CTOUT, UART3,    EMC,      R,      R, TIMER3,       R,     0, ND);
LPC_P(2,8,  SGPIO, CTOUT, UART3,    EMC,   GPIO,      R,      R,       R,     0, ND);
LPC_P(2,9,   GPIO, CTOUT, UART3,    EMC,      R,      R,      R,       R,     0, ND);

Annotation

Implementation Notes