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Diffstat (limited to 'include/linux/spi/spi.h')
-rw-r--r--include/linux/spi/spi.h51
1 files changed, 13 insertions, 38 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index c47c4b4da97e..97b60b37f445 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -20,6 +20,7 @@
#define __LINUX_SPI_H
#include <linux/device.h>
+#include <linux/mod_devicetable.h>
/*
* INTERFACES between SPI master-side drivers and SPI infrastructure.
@@ -86,7 +87,7 @@ struct spi_device {
int irq;
void *controller_state;
void *controller_data;
- char modalias[32];
+ char modalias[SPI_NAME_SIZE];
/*
* likely need more hooks for more protocol options affecting how
@@ -145,6 +146,7 @@ struct spi_message;
/**
* struct spi_driver - Host side "protocol" driver
+ * @id_table: List of SPI devices supported by this driver
* @probe: Binds this driver to the spi device. Drivers can verify
* that the device is actually present, and may need to configure
* characteristics (such as bits_per_word) which weren't needed for
@@ -170,6 +172,7 @@ struct spi_message;
* MMC, RTC, filesystem character device nodes, and hardware monitoring.
*/
struct spi_driver {
+ const struct spi_device_id *id_table;
int (*probe)(struct spi_device *spi);
int (*remove)(struct spi_device *spi);
void (*shutdown)(struct spi_device *spi);
@@ -207,6 +210,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
* each slave has a chipselect signal, but it's common that not
* every chipselect is connected to a slave.
* @dma_alignment: SPI controller constraint on DMA buffers alignment.
+ * @mode_bits: flags understood by this controller driver
+ * @flags: other constraints relevant to this driver
* @setup: updates the device mode and clocking records used by a
* device's SPI controller; protocol code may call this. This
* must fail if an unrecognized or unsupported mode is requested.
@@ -253,6 +258,8 @@ struct spi_master {
/* other constraints relevant to this driver */
u16 flags;
#define SPI_MASTER_HALF_DUPLEX BIT(0) /* can't do full duplex */
+#define SPI_MASTER_NO_RX BIT(1) /* can't do buffer read */
+#define SPI_MASTER_NO_TX BIT(2) /* can't do buffer write */
/* Setup mode and clock, etc (spi driver may call many times).
*
@@ -533,42 +540,7 @@ static inline void spi_message_free(struct spi_message *m)
}
extern int spi_setup(struct spi_device *spi);
-
-/**
- * spi_async - asynchronous SPI transfer
- * @spi: device with which data will be exchanged
- * @message: describes the data transfers, including completion callback
- * Context: any (irqs may be blocked, etc)
- *
- * This call may be used in_irq and other contexts which can't sleep,
- * as well as from task contexts which can sleep.
- *
- * The completion callback is invoked in a context which can't sleep.
- * Before that invocation, the value of message->status is undefined.
- * When the callback is issued, message->status holds either zero (to
- * indicate complete success) or a negative error code. After that
- * callback returns, the driver which issued the transfer request may
- * deallocate the associated memory; it's no longer in use by any SPI
- * core or controller driver code.
- *
- * Note that although all messages to a spi_device are handled in
- * FIFO order, messages may go to different devices in other orders.
- * Some device might be higher priority, or have various "hard" access
- * time requirements, for example.
- *
- * On detection of any fault during the transfer, processing of
- * the entire message is aborted, and the device is deselected.
- * Until returning from the associated message completion callback,
- * no other spi_message queued to that device will be processed.
- * (This rule applies equally to all the synchronous transfer calls,
- * which are wrappers around this core asynchronous primitive.)
- */
-static inline int
-spi_async(struct spi_device *spi, struct spi_message *message)
-{
- message->spi = spi;
- return spi->master->transfer(spi, message);
-}
+extern int spi_async(struct spi_device *spi, struct spi_message *message);
/*---------------------------------------------------------------------------*/
@@ -732,7 +704,7 @@ struct spi_board_info {
* controller_data goes to spi_device.controller_data,
* irq is copied too
*/
- char modalias[32];
+ char modalias[SPI_NAME_SIZE];
const void *platform_data;
void *controller_data;
int irq;
@@ -800,4 +772,7 @@ spi_unregister_device(struct spi_device *spi)
device_unregister(&spi->dev);
}
+extern const struct spi_device_id *
+spi_get_device_id(const struct spi_device *sdev);
+
#endif /* __LINUX_SPI_H */