[PATCH v3 6/9] spi: stm32: add stm32_spi_is_enabled() helper

[Dario Binacchi]

Add a helper to check the SPE (SPI Enable) bit and replace the
open-coded bitwise check in stm32_spi_stopxfer() with this helper to
improve readability and consistency.

This is also a preparatory step for future driver updates that require
checking the SPI enable state across different code paths.

Signed-off-by: Dario Binacchi <dario.binacchi at amarulasolutions.com>
---

(Added in v3)

 drivers/spi/stm32_spi.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/stm32_spi.c b/drivers/spi/stm32_spi.c
index adba97915cd3..70eb8735e03d 100644
--- a/drivers/spi/stm32_spi.c
+++ b/drivers/spi/stm32_spi.c
@@ -192,6 +192,11 @@ static void stm32_spi_read_rxfifo(struct udevice *bus)
 	log_debug("%d bytes left\n", priv->rx_len);
 }
 
+static bool stm32_spi_is_enabled(void __iomem *base)
+{
+	return !!(readl(base + STM32_SPI_CR1) & SPI_CR1_SPE);
+}
+
 static int stm32_spi_enable(void __iomem *base)
 {
 	log_debug("\n");
@@ -245,9 +250,7 @@ static void stm32_spi_stopxfer(struct udevice *dev)
 
 	dev_dbg(dev, "\n");
 
-	cr1 = readl(base + STM32_SPI_CR1);
-
-	if (!(cr1 & SPI_CR1_SPE))
+	if (!stm32_spi_is_enabled(base))
 		return;
 
 	/* Wait on EOT or suspend the flow */
-- 
2.43.0