#define _SPI_H_
#include <common.h>
+#include <linux/bitops.h>
/* SPI mode flags */
#define SPI_CPHA BIT(0) /* clock phase */
#define SPI_DEFAULT_WORDLEN 8
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
/* TODO(sjg@chromium.org): Remove this and use max_hz from struct spi_slave */
struct dm_spi_bus {
uint max_hz;
#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
*
* For driver model this is the per-child data used by the SPI bus. It can
* @flags: Indication of SPI flags.
*/
struct spi_slave {
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
struct udevice *dev; /* struct spi_slave is dev->parentdata */
uint max_hz;
uint speed;
*/
int spi_cs_is_valid(unsigned int bus, unsigned int cs);
-#ifndef CONFIG_DM_SPI
+#if !CONFIG_IS_ENABLED(DM_SPI)
/**
* Activate a SPI chipselect.
* This function is provided by the board code when using a driver
return ret < 0 ? ret : din[1];
}
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
/**
* struct spi_cs_info - Information about a bus chip select