[DNM] drivers: stm32: use device_get/put

Use device_get/put.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

Author: gmarull

drivers/gpio/gpio_stm32.c

@@ -714,8 +714,9 @@ static int gpio_stm32_init(const struct device *dev)
 
 	data->dev = dev;
 
-	if (!device_is_ready(DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE))) {
-		return -ENODEV;
+	ret = device_get(DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE));
+	if (ret < 0) {
+		return ret;
 	}
 
 #if (defined(PWR_CR2_IOSV) || defined(PWR_SVMCR_IO2SV)) && \

drivers/pinctrl/pinctrl_stm32.c

@@ -211,18 +211,24 @@ static int stm32_pins_remap(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt)
 static int stm32_pin_configure(uint32_t pin, uint32_t pin_cgf, uint32_t pin_func)
 {
 	const struct device *port_device;
+	int ret;
 
 	if (STM32_PORT(pin) >= gpio_ports_cnt) {
 		return -EINVAL;
 	}
 
 	port_device = gpio_ports[STM32_PORT(pin)];
 
-	if ((port_device == NULL) || (!device_is_ready(port_device))) {
-		return -ENODEV;
+	ret = device_get(port_device);
+	if (ret < 0) {
+		return ret;
 	}
 
-	return gpio_stm32_configure(port_device, STM32_PIN(pin), pin_cgf, pin_func);
+	ret = gpio_stm32_configure(port_device, STM32_PIN(pin), pin_cgf, pin_func);
+
+	(void)device_put(port_device);
+
+	return ret;
 }
 
 int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,

drivers/serial/uart_stm32.c

@@ -1815,18 +1815,21 @@ static int uart_stm32_async_init(const struct device *dev)
 	const struct uart_stm32_config *config = dev->config;
 	USART_TypeDef *usart = config->usart;
 	struct uart_stm32_data *data = dev->data;
+	int ret;
 
 	data->uart_dev = dev;
 
 	if (data->dma_rx.dma_dev != NULL) {
-		if (!device_is_ready(data->dma_rx.dma_dev)) {
-			return -ENODEV;
+		ret = device_get(data->dma_rx.dma_dev);
+		if (ret < 0) {
+			return ret;
 		}
 	}
 
 	if (data->dma_tx.dma_dev != NULL) {
-		if (!device_is_ready(data->dma_tx.dma_dev)) {
-			return -ENODEV;
+		ret = device_get(data->dma_tx.dma_dev);
+		if (ret < 0) {
+			return ret;
 		}
 	}
 
@@ -1998,9 +2001,10 @@ static int uart_stm32_clocks_enable(const struct device *dev)
 
 	__uart_stm32_get_clock(dev);
 
-	if (!device_is_ready(data->clock)) {
+	err = device_get(data->clock);
+	if (err < 0) {
 		LOG_ERR("clock control device not ready");
-		return -ENODEV;
+		return err;
 	}
 
 	/* enable clock */
@@ -2029,12 +2033,14 @@ static int uart_stm32_registers_configure(const struct device *dev)
 	USART_TypeDef *usart = config->usart;
 	struct uart_stm32_data *data = dev->data;
 	struct uart_config *uart_cfg = data->uart_cfg;
+	int ret;
 
 	LL_USART_Disable(usart);
 
-	if (!device_is_ready(config->reset.dev)) {
+	ret = device_get(config->reset.dev);
+	if (ret < 0) {
 		LOG_ERR("reset controller not ready");
-		return -ENODEV;
+		return ret;
 	}
 
 	/* Reset UART to default state using RCC */