From a9507793d96d28e8835210fb059a0eebb6fa2b5e Mon Sep 17 00:00:00 2001
From: Francois Ramu <francois.ramu@st.com>
Date: Thu, 10 Mar 2022 10:21:22 +0100
Subject: [PATCH] drivers: spi: stm32 spi with dma must enable cs after periph
When using DMA to transfer over the spi, the spi_stm32_cs_control
is done after enabling the SPI. The same sequence applies
in the transceive_dma function as in transceive function
Signed-off-by: Francois Ramu <francois.ramu@st.com>
---
drivers/spi/spi_ll_stm32.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi_ll_stm32.c b/drivers/spi/spi_ll_stm32.c
index e230c884076..7e7387f099e 100644
--- a/drivers/spi/spi_ll_stm32.c
+++ b/drivers/spi/spi_ll_stm32.c
@@ -724,9 +724,6 @@ static int transceive_dma(const struct device *dev,
/* Set buffers info */
spi_context_buffers_setup(&data->ctx, tx_bufs, rx_bufs, 1);
- /* This is turned off in spi_stm32_complete(). */
- spi_stm32_cs_control(dev, true);
-
#if defined(CONFIG_SOC_SERIES_STM32H7X)
/* set request before enabling (else SPI CFG1 reg is write protected) */
LL_SPI_EnableDMAReq_RX(spi);
@@ -740,6 +737,9 @@ static int transceive_dma(const struct device *dev,
LL_SPI_Enable(spi);
#endif /* CONFIG_SOC_SERIES_STM32H7X */
+ /* This is turned off in spi_stm32_complete(). */
+ spi_stm32_cs_control(dev, true);
+
while (data->ctx.rx_len > 0 || data->ctx.tx_len > 0) {
size_t dma_len;
--
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