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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2016-03-16 02:54:45 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2016-03-16 02:54:45 +0300
commit245f0db0de926601353776085e6f6a4c974c5615 (patch)
treeb493e9e726f4a898041f7861d0df328aa1a348a1 /include/linux/spi
parent24672bdfb357b91bed0ea8d432241bf7bdefc8a8 (diff)
parentb562e44f507e863c6792946e4e1b1449fbbac85d (diff)
downloadlinux-245f0db0de926601353776085e6f6a4c974c5615.tar.xz
Merge tag 'v4.5' into next
Merge with Linux 4.5 to get PROPERTY_ENTRY_INTEGER() that is needed to fix pxa/raumfeld rotary encoder properties.
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/spi.h29
1 files changed, 22 insertions, 7 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index cce80e6dc7d1..53be3a4c60cb 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -425,6 +425,12 @@ struct spi_master {
#define SPI_MASTER_MUST_RX BIT(3) /* requires rx */
#define SPI_MASTER_MUST_TX BIT(4) /* requires tx */
+ /*
+ * on some hardware transfer size may be constrained
+ * the limit may depend on device transfer settings
+ */
+ size_t (*max_transfer_size)(struct spi_device *spi);
+
/* lock and mutex for SPI bus locking */
spinlock_t bus_lock_spinlock;
struct mutex bus_lock_mutex;
@@ -762,10 +768,15 @@ struct spi_message {
void *state;
};
+static inline void spi_message_init_no_memset(struct spi_message *m)
+{
+ INIT_LIST_HEAD(&m->transfers);
+}
+
static inline void spi_message_init(struct spi_message *m)
{
memset(m, 0, sizeof *m);
- INIT_LIST_HEAD(&m->transfers);
+ spi_message_init_no_memset(m);
}
static inline void
@@ -832,6 +843,15 @@ extern int spi_async(struct spi_device *spi, struct spi_message *message);
extern int spi_async_locked(struct spi_device *spi,
struct spi_message *message);
+static inline size_t
+spi_max_transfer_size(struct spi_device *spi)
+{
+ struct spi_master *master = spi->master;
+ if (!master->max_transfer_size)
+ return SIZE_MAX;
+ return master->max_transfer_size(spi);
+}
+
/*---------------------------------------------------------------------------*/
/* All these synchronous SPI transfer routines are utilities layered
@@ -1115,12 +1135,7 @@ spi_add_device(struct spi_device *spi);
extern struct spi_device *
spi_new_device(struct spi_master *, struct spi_board_info *);
-static inline void
-spi_unregister_device(struct spi_device *spi)
-{
- if (spi)
- device_unregister(&spi->dev);
-}
+extern void spi_unregister_device(struct spi_device *spi);
extern const struct spi_device_id *
spi_get_device_id(const struct spi_device *sdev);