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drivers: pinctrl: nrf: add support for uart/uarte peripheral

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Add support for configuring UART/UARTE peripheral pins.

Co-authored-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This commit is contained in:
Gerard Marull-Paretas 2021-08-10 11:24:54 +02:00 • committed by Carles Cufí
commit 6399ad50f4
2 changed files with 39 additions and 2 deletions
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32
drivers/pinctrl/pinctrl_nrf.c
View file

@ -27,6 +27,12 @@ BUILD_ASSERT(((NRF_DRIVE_S0S1 == NRF_GPIO_PIN_S0S1) &&
(1U)),
"nRF pinctrl drive settings do not match HAL values");
#if DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_uart)
#define NRF_PSEL_UART(reg, line) ((NRF_UART_Type *)reg)->PSEL##line
#elif DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_uarte)
#define NRF_PSEL_UART(reg, line) ((NRF_UARTE_Type *)reg)->PSEL.line
#endif
/**
* @brief Configure pin settings.
*
@ -51,10 +57,32 @@ __unused static void nrf_pin_configure(pinctrl_soc_pin_t pin,
int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
uintptr_t reg)
{
ARG_UNUSED(reg);
for (uint8_t i = 0U; i < pin_cnt; i++) {
switch (NRF_GET_FUN(pins[i])) {
#if defined(NRF_PSEL_UART)
case NRF_FUN_UART_TX:
NRF_PSEL_UART(reg, TXD) = NRF_GET_PIN(pins[i]);
nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 1);
nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_DISCONNECT);
break;
case NRF_FUN_UART_RX:
NRF_PSEL_UART(reg, RXD) = NRF_GET_PIN(pins[i]);
nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_INPUT,
NRF_GPIO_PIN_INPUT_CONNECT);
break;
case NRF_FUN_UART_RTS:
NRF_PSEL_UART(reg, RTS) = NRF_GET_PIN(pins[i]);
nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 1);
nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_DISCONNECT);
break;
case NRF_FUN_UART_CTS:
NRF_PSEL_UART(reg, CTS) = NRF_GET_PIN(pins[i]);
nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_INPUT,
NRF_GPIO_PIN_INPUT_CONNECT);
break;
#endif /* defined(NRF_PSEL_UART) */
default:
return -ENOTSUP;
}

9
include/dt-bindings/pinctrl/nrf-pinctrl.h
View file

@ -51,6 +51,15 @@
* @{
*/
/** UART TX */
#define NRF_FUN_UART_TX 0U
/** UART RX */
#define NRF_FUN_UART_RX 1U
/** UART RTS */
#define NRF_FUN_UART_RTS 2U
/** UART CTS */
#define NRF_FUN_UART_CTS 3U
/** @} */
/**