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src/drivers/gpio/dwgpio.h
79 строк
2 KB
Michael Brown
[dwgpio] Use fdt_reg() to get GPIO port numbers
07 авг 2025, 17:49
07 авг 2025, 17:49
8460dc4
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#ifndef _DWGPIO_H #define _DWGPIO_H /** @file * * Synopsys DesignWare GPIO driver * */ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); /** Maximum number of GPIOs per port */ #define DWGPIO_MAX_COUNT 32 /** Software port * * This is the register bank containing the DR, DDR, and CTL bits. */ #define DWGPIO_SWPORT( x ) ( 0x00 + ( (x) * 0x0c ) ) /** Data register * * Bits written to this register are output if the corresponding DDR * bit is set to 1 (output) and the corresponding CTL bit is set to 0 * (software control). * * Bits read from this register reflect the most recently written * value, and do not reflect the actual status of the GPIO pin. */ #define DWGPIO_SWPORT_DR 0x00 /** Data direction register * * The GPIO is an output if the corresponding bit in this register is * set to 1. */ #define DWGPIO_SWPORT_DDR 0x04 /** Control register * * The GPIO is under software control (i.e. is functioning as a GPIO, * rather than being controlled by a separate functional block) if the * corresponding bit in this register is set to 0. */ #define DWGPIO_SWPORT_CTL 0x08 /** External port * * Bits read from this register reflect the current status of the GPIO * pin. */ #define DWGPIO_EXT_PORT( x ) ( 0x50 + ( (x) * 0x04 ) ) /** A DesignWare GPIO port group */ struct dwgpio_group { /** Registers */ void *regs; }; /** A DesignWare GPIO port */ struct dwgpio { /** Device name */ const char *name; /** Port index */ unsigned int port; /** Software port registers */ void *swport; /** External port register */ void *ext; /** Original data register value */ uint32_t dr; /** Original data direction register value */ uint32_t ddr; /** Original control register value */ uint32_t ctl; }; #endif /* _DWGPIO_H */