X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fspi.h;h=5cc6d6e0087fa5b00eff5d9489ff4838cf2e0a6a;hb=1e389a434aa9821330523002ee7b50d1147e0fef;hp=852f570eaa8d997c4fedd2c5b5dd8f5d7811746f;hpb=86e42b3629c212d98c7a17e36bd6c0702dcd864c;p=oweals%2Fu-boot.git

diff --git a/include/spi.h b/include/spi.h
index 852f570eaa..5cc6d6e008 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -10,6 +10,7 @@
 #define _SPI_H_
 
 #include <common.h>
+#include <linux/bitops.h>
 
 /* SPI mode flags */
 #define SPI_CPHA	BIT(0)			/* clock phase */
@@ -66,6 +67,39 @@ struct dm_spi_slave_platdata {
 
 #endif /* CONFIG_DM_SPI */
 
+/**
+ * enum spi_clock_phase - indicates  the clock phase to use for SPI (CPHA)
+ *
+ * @SPI_CLOCK_PHASE_FIRST: Data sampled on the first phase
+ * @SPI_CLOCK_PHASE_SECOND: Data sampled on the second phase
+ */
+enum spi_clock_phase {
+	SPI_CLOCK_PHASE_FIRST,
+	SPI_CLOCK_PHASE_SECOND,
+};
+
+/**
+ * enum spi_wire_mode - indicates the number of wires used for SPI
+ *
+ * @SPI_4_WIRE_MODE: Normal bidirectional mode with MOSI and MISO
+ * @SPI_3_WIRE_MODE: Unidirectional version with a single data line SISO
+ */
+enum spi_wire_mode {
+	SPI_4_WIRE_MODE,
+	SPI_3_WIRE_MODE,
+};
+
+/**
+ * enum spi_polarity - indicates the polarity of the SPI bus (CPOL)
+ *
+ * @SPI_POLARITY_LOW: Clock is low in idle state
+ * @SPI_POLARITY_HIGH: Clock is high in idle state
+ */
+enum spi_polarity {
+	SPI_POLARITY_LOW,
+	SPI_POLARITY_HIGH,
+};
+
 /**
  * struct spi_slave - Representation of a SPI slave
  *