blob: 2fc97b36267781567028d7296f70c703d8ac442a [file] [log] [blame]
/*
* Copyright (c) 2018 Google LLC.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <pinmux.h>
#include <soc.h>
struct pinmux_sam0_config {
PortGroup *regs;
};
static int pinmux_sam0_set(struct device *dev, u32_t pin, u32_t func)
{
const struct pinmux_sam0_config *cfg = dev->config->config_info;
bool odd_pin = pin & 1;
int idx = pin / 2;
/* Each pinmux register holds the config for two pins. The
* even numbered pin goes in the bits 0..3 and the odd
* numbered pin in bits 4..7.
*/
if (odd_pin) {
cfg->regs->PMUX[idx].bit.PMUXO = func;
} else {
cfg->regs->PMUX[idx].bit.PMUXE = func;
}
cfg->regs->PINCFG[pin].bit.PMUXEN = 1;
return 0;
}
static int pinmux_sam0_get(struct device *dev, u32_t pin, u32_t *func)
{
const struct pinmux_sam0_config *cfg = dev->config->config_info;
bool odd_pin = pin & 1;
int idx = pin / 2;
if (odd_pin) {
*func = cfg->regs->PMUX[idx].bit.PMUXO;
} else {
*func = cfg->regs->PMUX[idx].bit.PMUXE;
}
return 0;
}
static int pinmux_sam0_pullup(struct device *dev, u32_t pin, u8_t func)
{
return -ENOTSUP;
}
static int pinmux_sam0_input(struct device *dev, u32_t pin, u8_t func)
{
return -ENOTSUP;
}
static int pinmux_sam0_init(struct device *dev)
{
/* Nothing to do. The GPIO clock is enabled at reset. */
return 0;
}
const struct pinmux_driver_api pinmux_sam0_api = {
.set = pinmux_sam0_set,
.get = pinmux_sam0_get,
.pullup = pinmux_sam0_pullup,
.input = pinmux_sam0_input,
};
#if CONFIG_PINMUX_SAM0_A_BASE_ADDRESS
static const struct pinmux_sam0_config pinmux_sam0_config_0 = {
.regs = (PortGroup *)CONFIG_PINMUX_SAM0_A_BASE_ADDRESS,
};
DEVICE_AND_API_INIT(pinmux_sam0_0, CONFIG_PINMUX_SAM0_A_LABEL,
pinmux_sam0_init, NULL, &pinmux_sam0_config_0,
PRE_KERNEL_1, CONFIG_PINMUX_INIT_PRIORITY,
&pinmux_sam0_api);
#endif
#if CONFIG_PINMUX_SAM0_B_BASE_ADDRESS
static const struct pinmux_sam0_config pinmux_sam0_config_1 = {
.regs = (PortGroup *)CONFIG_PINMUX_SAM0_B_BASE_ADDRESS,
};
DEVICE_AND_API_INIT(pinmux_sam0_1, CONFIG_PINMUX_SAM0_B_LABEL,
pinmux_sam0_init, NULL, &pinmux_sam0_config_1,
PRE_KERNEL_1, CONFIG_PINMUX_INIT_PRIORITY,
&pinmux_sam0_api);
#endif