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lib: utils/gpio: Use fdt_driver for initialization

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FDT gpio drivers have an extra .xlate operation, so they need to embed
the `struct fdt_driver` inside the subsystem-specific type. The gpio
subsystem always initializes the driver for a specific DT node.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2024-11-11 14:02:49 -08:00
committed by Anup Patel
parent 10df2d6fb5
commit bef8f9b806
7 changed files with 28 additions and 40 deletions
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5
include/sbi_utils/gpio/fdt_gpio.h
View File

@@ -10,18 +10,17 @@
#ifndef __FDT_GPIO_H__
#define __FDT_GPIO_H__
#include <sbi_utils/fdt/fdt_driver.h>
#include <sbi_utils/gpio/gpio.h>
struct fdt_phandle_args;
/** FDT based GPIO driver */
struct fdt_gpio {
const struct fdt_match *match_table;
struct fdt_driver driver;
int (*xlate)(struct gpio_chip *chip,
const struct fdt_phandle_args *pargs,
struct gpio_pin *out_pin);
int (*init)(const void *fdt, int nodeoff,
const struct fdt_match *match);
};
/** Get a GPIO pin using "gpios" DT property of client DT node */

2
include/sbi_utils/gpio/gpio.h
View File

@@ -40,7 +40,7 @@ struct gpio_pin {
/** Representation of a GPIO chip */
struct gpio_chip {
/** Pointer to GPIO driver owning this GPIO chip */
void *driver;
const void *driver;
/** Uniquie ID of the GPIO chip assigned by the driver */
unsigned int id;
/** Number of GPIOs supported by the GPIO chip */