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authorSimon Glass <sjg@chromium.org>2013-12-03 16:43:24 -0700
committerSimon Glass <sjg@chromium.org>2013-12-09 12:22:12 -0700
commit0efc02499f9131bd7e1689ebb8d626ef12387de4 (patch)
treed6b4296f983ebe381432d7db3b12e4368ec0efe9 /include/spi.h
parent7b3efc66996b6686ad393b706c323990afa31930 (diff)
downloadu-boot-0efc02499f9131bd7e1689ebb8d626ef12387de4.tar.gz
spi_flash: Add spi_flash_probe_fdt() to locate SPI by FDT node
This allows us to put the SPI flash chip inside the SPI interface node, with U-Boot finding the correct bus and chip select automatically. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/spi.h')
-rw-r--r--include/spi.h23
1 files changed, 17 insertions, 6 deletions
diff --git a/include/spi.h b/include/spi.h
index e2563c99f2..aba792244a 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -259,13 +259,24 @@ static inline int spi_w8r8(struct spi_slave *slave, unsigned char byte)
* spi_free_slave() to free it later.
*
* @param blob: Device tree blob
- * @param node: SPI peripheral node to use
- * @param cs: Chip select to use
- * @param max_hz: Maximum SCK rate in Hz (0 for default)
- * @param mode: Clock polarity, clock phase and other parameters
+ * @param slave_node: Slave node to use
+ * @param spi_node: SPI peripheral node to use
* @return pointer to new spi_slave structure
*/
-struct spi_slave *spi_setup_slave_fdt(const void *blob, int node,
- unsigned int cs, unsigned int max_hz, unsigned int mode);
+struct spi_slave *spi_setup_slave_fdt(const void *blob, int slave_node,
+ int spi_node);
+
+/**
+ * spi_base_setup_slave_fdt() - helper function to set up a SPI slace
+ *
+ * This decodes SPI properties from the slave node to determine the
+ * chip select and SPI parameters.
+ *
+ * @blob: Device tree blob
+ * @busnum: Bus number to use
+ * @node: Device tree node for the SPI bus
+ */
+struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
+ int node);
#endif /* _SPI_H_ */