blob: bcb28fa3342d9faa7c1e89333a54adbadbe9ed82 [file] [log] [blame]
/*
* Copyright (c) 2020 Seagate Technology LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_lpc11u6x_pinmux
/**
* @file
* @brief pinmux driver for NXP LPC11U6X SoCs
*
* This driver allows to configure the IOCON (I/O control) registers found
* on the LPC11U6x MCUs.
*
* The IOCON registers are divided into three ports. The number of pins
* available on each port depends on the package type (48, 64 or 100 pins).
* Each port is handled as a distinct device and is defined by a dedicated
* device tree node. This node provides the port's base address and number
* of pins information.
*/
#include <errno.h>
#include <zephyr/drivers/pinmux.h>
struct pinmux_lpc11u6x_config {
uint8_t port;
volatile uint32_t *base;
uint8_t npins;
};
static int pinmux_lpc11u6x_set(const struct device *dev, uint32_t pin,
uint32_t func)
{
const struct pinmux_lpc11u6x_config *config = dev->config;
volatile uint32_t *base;
if (pin >= config->npins) {
return -EINVAL;
}
/* Handle 4 bytes hole between PIO2_1 and PIO2_2. */
if (config->port == 2 && pin > 1) {
base = config->base + 1;
} else {
base = config->base;
}
base[pin] = func;
return 0;
}
static int
pinmux_lpc11u6x_get(const struct device *dev, uint32_t pin, uint32_t *func)
{
const struct pinmux_lpc11u6x_config *config = dev->config;
volatile uint32_t *base;
if (pin >= config->npins) {
return -EINVAL;
}
/* Handle 4 bytes hole between PIO2_1 and PIO2_2. */
if (config->port == 2 && pin > 1) {
base = config->base + 1;
} else {
base = config->base;
}
*func = base[pin];
return 0;
}
static int
pinmux_lpc11u6x_pullup(const struct device *dev, uint32_t pin, uint8_t func)
{
return -ENOTSUP;
}
static int
pinmux_lpc11u6x_input(const struct device *dev, uint32_t pin, uint8_t func)
{
return -ENOTSUP;
}
static int pinmux_lpc11u6x_init(const struct device *dev)
{
return 0;
}
static const struct pinmux_driver_api pinmux_lpc11u6x_driver_api = {
.set = pinmux_lpc11u6x_set,
.get = pinmux_lpc11u6x_get,
.pullup = pinmux_lpc11u6x_pullup,
.input = pinmux_lpc11u6x_input,
};
#define PINMUX_LPC11U6X_INIT(id) \
static const struct pinmux_lpc11u6x_config \
pinmux_lpc11u6x_config_##id = { \
.port = id, \
.base = (volatile uint32_t *) DT_INST_REG_ADDR(id), \
.npins = DT_INST_REG_SIZE(id) / 4, \
}; \
\
DEVICE_DT_INST_DEFINE(id, &pinmux_lpc11u6x_init, \
NULL, NULL, &pinmux_lpc11u6x_config_##id, \
PRE_KERNEL_1, CONFIG_PINMUX_INIT_PRIORITY, \
&pinmux_lpc11u6x_driver_api);
DT_INST_FOREACH_STATUS_OKAY(PINMUX_LPC11U6X_INIT)