davids5 commented on code in PR #7888:
URL: https://github.com/apache/nuttx/pull/7888#discussion_r1049575741
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arch/arm/src/s32k1xx/s32k1xx_lpspi.c:
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@@ -1593,7 +1620,151 @@ static void s32k1xx_lpspi_exchange_nodma(struct
spi_dev_s *dev,
}
}
}
-#endif /* !CONFIG_S32K1XX_LPSPI_DMA || CONFIG_S32K1XX_DMACAPABLE */
+
+/****************************************************************************
+ * Name: spi_exchange (with DMA capability)
+ *
+ * Description:
+ * Exchange a block of data on SPI using DMA
+ *
+ * Input Parameters:
+ * dev - Device-specific state data
+ * txbuffer - A pointer to the buffer of data to be sent
+ * rxbuffer - A pointer to a buffer in which to receive data
+ * nwords - the length of data to be exchanged in units of words.
+ * The wordsize is determined by the number of bits-per-word
+ * selected for the SPI interface. If nbits <= 8, the data is
+ * packed into uint8_t's; if nbits > 8, the data is packed into
+ * uint16_t's
+ *
+ * Returned Value:
+ * None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_S32K1XX_LPSPI_DMA
+static void s32k1xx_lpspi_exchange(struct spi_dev_s *dev,
+ const void *txbuffer, void *rxbuffer,
+ size_t nwords)
+{
+ int ret;
+ size_t adjust;
+ ssize_t nbytes;
+ static uint8_t rxdummy[4] aligned_data(4);
Review Comment:
Ok will keep it as is for now.
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