[nrf fromtree] drivers: serial: nrfx_uarte: Remove CONFIG_UART_n_GPIO_MANAGEMENT

This is a leftover from pre-pinctrl era and no longer makes sense.
Driver always manages gpio through pinctrl.

Support removed from uart and uarte shims.

Signed-off-by: Krzysztof Chruściński <[email protected]>
(cherry picked from commit 76db5b2)
Signed-off-by: Rafał Kuźnia <[email protected]>

Author: nordic-krch

drivers/serial/Kconfig.nrfx_uart_instance

@@ -119,12 +119,3 @@ config UART_$(nrfx_uart_num)_A2I_RX_BUF_COUNT
 	default 0
 	help
 	  Number of chunks into RX space is divided.
-
-config UART_$(nrfx_uart_num)_GPIO_MANAGEMENT
-	bool "GPIO management on port $(nrfx_uart_num)"
-	depends on PM_DEVICE
-	default y
-	help
-	  If enabled, the driver will configure the GPIOs used by the uart to
-	  their default configuration when device is powered down. The GPIOs
-	  will be configured back to correct state when UART is powered up.

drivers/serial/uart_nrfx_uart.c

@@ -1087,12 +1087,9 @@ static int uart_nrfx_pm_action(const struct device *dev,
 
 	switch (action) {
 	case PM_DEVICE_ACTION_RESUME:
-		if (IS_ENABLED(CONFIG_UART_0_GPIO_MANAGEMENT)) {
-			ret = pinctrl_apply_state(config->pcfg,
-						  PINCTRL_STATE_DEFAULT);
-			if (ret < 0) {
-				return ret;
-			}
+		ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
+		if (ret < 0) {
+			return ret;
 		}
 
 		nrf_uart_enable(uart0_addr);
@@ -1103,13 +1100,9 @@ static int uart_nrfx_pm_action(const struct device *dev,
 		break;
 	case PM_DEVICE_ACTION_SUSPEND:
 		nrf_uart_disable(uart0_addr);
-
-		if (IS_ENABLED(CONFIG_UART_0_GPIO_MANAGEMENT)) {
-			ret = pinctrl_apply_state(config->pcfg,
-						  PINCTRL_STATE_SLEEP);
-			if (ret < 0) {
-				return ret;
-			}
+		ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_SLEEP);
+		if (ret < 0) {
+			return ret;
 		}
 		break;
 	default:

drivers/serial/uart_nrfx_uarte.c

@@ -191,19 +191,16 @@ struct uarte_nrfx_data {
 #define UARTE_LOW_POWER_TX BIT(0)
 #define UARTE_LOW_POWER_RX BIT(1)
 
-/* If enabled, pins are managed when going to low power mode. */
-#define UARTE_CFG_FLAG_GPIO_MGMT   BIT(0)
-
 /* If enabled then ENDTX is PPI'ed to TXSTOP */
-#define UARTE_CFG_FLAG_PPI_ENDTX   BIT(1)
+#define UARTE_CFG_FLAG_PPI_ENDTX   BIT(0)
 
 /* If enabled then TIMER and PPI is used for byte counting. */
-#define UARTE_CFG_FLAG_HW_BYTE_COUNTING   BIT(2)
+#define UARTE_CFG_FLAG_HW_BYTE_COUNTING   BIT(1)
 
 /* If enabled then UARTE peripheral is disabled when not used. This allows
  * to achieve lowest power consumption in idle.
  */
-#define UARTE_CFG_FLAG_LOW_POWER   BIT(4)
+#define UARTE_CFG_FLAG_LOW_POWER   BIT(2)
 
 /* Macro for converting numerical baudrate to register value. It is convenient
  * to use this approach because for constant input it can calculate nrf setting
@@ -516,20 +513,6 @@ static int wait_tx_ready(const struct device *dev)
 	return key;
 }
 
-#if defined(UARTE_ANY_ASYNC) || defined(CONFIG_PM_DEVICE)
-static int pins_state_change(const struct device *dev, bool on)
-{
-	const struct uarte_nrfx_config *config = dev->config;
-
-	if (config->flags & UARTE_CFG_FLAG_GPIO_MGMT) {
-		return pinctrl_apply_state(config->pcfg,
-				on ? PINCTRL_STATE_DEFAULT : PINCTRL_STATE_SLEEP);
-	}
-
-	return 0;
-}
-#endif
-
 #ifdef UARTE_ANY_ASYNC
 
 /* Using Macro instead of static inline function to handle NO_OPTIMIZATIONS case
@@ -551,7 +534,7 @@ static int uarte_enable(const struct device *dev, uint32_t mask)
 		int ret;
 
 		data->async->low_power_mask |= mask;
-		ret = pins_state_change(dev, true);
+		ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
 		if (ret < 0) {
 			return ret;
 		}
@@ -1293,10 +1276,6 @@ static void async_uart_release(const struct device *dev, uint32_t dir_mask)
 		}
 
 		uart_disable(dev);
-		int err = pins_state_change(dev, false);
-
-		(void)err;
-		__ASSERT_NO_MSG(err == 0);
 	}
 
 	irq_unlock(key);
@@ -1924,8 +1903,7 @@ static int uarte_nrfx_pm_action(const struct device *dev,
 
 	switch (action) {
 	case PM_DEVICE_ACTION_RESUME:
-
-		ret = pins_state_change(dev, true);
+		ret = pinctrl_apply_state(cfg->pcfg, PINCTRL_STATE_DEFAULT);
 		if (ret < 0) {
 			return ret;
 		}
@@ -1994,7 +1972,7 @@ static int uarte_nrfx_pm_action(const struct device *dev,
 		wait_for_tx_stopped(dev);
 		uart_disable(dev);
 
-		ret = pins_state_change(dev, false);
+		ret = pinctrl_apply_state(cfg->pcfg, PINCTRL_STATE_SLEEP);
 		if (ret < 0) {
 			return ret;
 		}
@@ -2095,8 +2073,6 @@ static int uarte_nrfx_pm_action(const struct device *dev,
 		.pcfg = PINCTRL_DT_DEV_CONFIG_GET(UARTE(idx)),		       \
 		.uarte_regs = _CONCAT(NRF_UARTE, idx),                         \
 		.flags =						       \
-			(IS_ENABLED(CONFIG_UART_##idx##_GPIO_MANAGEMENT) ?     \
-				UARTE_CFG_FLAG_GPIO_MGMT : 0) |		       \
 			(IS_ENABLED(CONFIG_UART_##idx##_ENHANCED_POLL_OUT) ?   \
 				UARTE_CFG_FLAG_PPI_ENDTX : 0) |		       \
 			(IS_ENABLED(CONFIG_UART_##idx##_NRF_HW_ASYNC) ?        \