[PATCH 1/2] spi: introduce spi_get_master

[Jean-Christophe PLAGNIOL-VILLARD]

so we can request a master usefull for the spi command

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
 drivers/spi/spi.c |   12 ++++++++++++
 include/spi/spi.h |    2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 44040e5..6a5bd6d 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -219,6 +219,18 @@ int spi_register_master(struct spi_master *master)
 }
 EXPORT_SYMBOL(spi_register_master);
 
+struct spi_master *spi_get_master(int bus)
+{
+	struct spi_master* m;
+
+	list_for_each_entry(m, &spi_master_list, list) {
+		if (m->bus_num == bus)
+			return m;
+	}
+
+	return NULL;
+}
+
 int spi_sync(struct spi_device *spi, struct spi_message *message)
 {
 	return spi->master->transfer(spi, message);
diff --git a/include/spi/spi.h b/include/spi/spi.h
index 1773ca2..d6570a4 100644
--- a/include/spi/spi.h
+++ b/include/spi/spi.h
@@ -432,6 +432,8 @@ static inline ssize_t spi_w8r8(struct spi_device *spi, u8 cmd)
 
 extern struct bus_type spi_bus;
 
+struct spi_master *spi_get_master(int bus);
+
 static inline int spi_register_driver(struct driver_d *drv)
 {
 	drv->bus = &spi_bus;
-- 
1.7.10.4