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-rw-r--r--include/linux/spi/pxa2xx_spi.h1
-rw-r--r--include/linux/spi/spi.h44
-rw-r--r--include/linux/spi/spi_bitbang.h2
3 files changed, 30 insertions, 17 deletions
diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h
index 6d36dacec..9ec4c147a 100644
--- a/include/linux/spi/pxa2xx_spi.h
+++ b/include/linux/spi/pxa2xx_spi.h
@@ -23,7 +23,6 @@ struct dma_chan;
/* device.platform_data for SSP controller devices */
struct pxa2xx_spi_master {
- u32 clock_enable;
u16 num_chipselect;
u8 enable_dma;
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 6b00f18f5..cce80e6dc 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -51,6 +51,8 @@ extern struct bus_type spi_bus_type;
* @bytes_tx: number of bytes sent to device
* @bytes_rx: number of bytes received from device
*
+ * @transfer_bytes_histo:
+ * transfer bytes histogramm
*/
struct spi_statistics {
spinlock_t lock; /* lock for the whole structure */
@@ -68,6 +70,8 @@ struct spi_statistics {
unsigned long long bytes_rx;
unsigned long long bytes_tx;
+#define SPI_STATISTICS_HISTO_SIZE 17
+ unsigned long transfer_bytes_histo[SPI_STATISTICS_HISTO_SIZE];
};
void spi_statistics_add_transfer_stats(struct spi_statistics *stats,
@@ -250,7 +254,7 @@ static inline struct spi_driver *to_spi_driver(struct device_driver *drv)
return drv ? container_of(drv, struct spi_driver, driver) : NULL;
}
-extern int spi_register_driver(struct spi_driver *sdrv);
+extern int __spi_register_driver(struct module *owner, struct spi_driver *sdrv);
/**
* spi_unregister_driver - reverse effect of spi_register_driver
@@ -263,6 +267,10 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
driver_unregister(&sdrv->driver);
}
+/* use a define to avoid include chaining to get THIS_MODULE */
+#define spi_register_driver(driver) \
+ __spi_register_driver(THIS_MODULE, driver)
+
/**
* module_spi_driver() - Helper macro for registering a SPI driver
* @__spi_driver: spi_driver struct
@@ -843,8 +851,10 @@ extern int spi_bus_unlock(struct spi_master *master);
* @len: data buffer size
* Context: can sleep
*
- * This writes the buffer and returns zero or a negative error code.
+ * This function writes the buffer @buf.
* Callable only from contexts that can sleep.
+ *
+ * Return: zero on success, else a negative error code.
*/
static inline int
spi_write(struct spi_device *spi, const void *buf, size_t len)
@@ -867,8 +877,10 @@ spi_write(struct spi_device *spi, const void *buf, size_t len)
* @len: data buffer size
* Context: can sleep
*
- * This reads the buffer and returns zero or a negative error code.
+ * This function reads the buffer @buf.
* Callable only from contexts that can sleep.
+ *
+ * Return: zero on success, else a negative error code.
*/
static inline int
spi_read(struct spi_device *spi, void *buf, size_t len)
@@ -895,7 +907,7 @@ spi_read(struct spi_device *spi, void *buf, size_t len)
*
* For more specific semantics see spi_sync().
*
- * It returns zero on success, else a negative error code.
+ * Return: Return: zero on success, else a negative error code.
*/
static inline int
spi_sync_transfer(struct spi_device *spi, struct spi_transfer *xfers,
@@ -919,9 +931,10 @@ extern int spi_write_then_read(struct spi_device *spi,
* @cmd: command to be written before data is read back
* Context: can sleep
*
- * This returns the (unsigned) eight bit number returned by the
- * device, or else a negative error code. Callable only from
- * contexts that can sleep.
+ * Callable only from contexts that can sleep.
+ *
+ * Return: the (unsigned) eight bit number returned by the
+ * device, or else a negative error code.
*/
static inline ssize_t spi_w8r8(struct spi_device *spi, u8 cmd)
{
@@ -940,12 +953,13 @@ static inline ssize_t spi_w8r8(struct spi_device *spi, u8 cmd)
* @cmd: command to be written before data is read back
* Context: can sleep
*
- * This returns the (unsigned) sixteen bit number returned by the
- * device, or else a negative error code. Callable only from
- * contexts that can sleep.
- *
* The number is returned in wire-order, which is at least sometimes
* big-endian.
+ *
+ * Callable only from contexts that can sleep.
+ *
+ * Return: the (unsigned) sixteen bit number returned by the
+ * device, or else a negative error code.
*/
static inline ssize_t spi_w8r16(struct spi_device *spi, u8 cmd)
{
@@ -964,13 +978,13 @@ static inline ssize_t spi_w8r16(struct spi_device *spi, u8 cmd)
* @cmd: command to be written before data is read back
* Context: can sleep
*
- * This returns the (unsigned) sixteen bit number returned by the device in cpu
- * endianness, or else a negative error code. Callable only from contexts that
- * can sleep.
- *
* This function is similar to spi_w8r16, with the exception that it will
* convert the read 16 bit data word from big-endian to native endianness.
*
+ * Callable only from contexts that can sleep.
+ *
+ * Return: the (unsigned) sixteen bit number returned by the device in cpu
+ * endianness, or else a negative error code.
*/
static inline ssize_t spi_w8r16be(struct spi_device *spi, u8 cmd)
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index 85578d4be..154788ed2 100644
--- a/include/linux/spi/spi_bitbang.h
+++ b/include/linux/spi/spi_bitbang.h
@@ -4,7 +4,7 @@
#include <linux/workqueue.h>
struct spi_bitbang {
- spinlock_t lock;
+ struct mutex lock;
u8 busy;
u8 use_dma;
u8 flags; /* extra spi->mode support */