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spi_flash: Add spi_flash_probe_fdt() to locate SPI by FDT node

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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>
This commit is contained in:
Simon Glass
2013-12-03 16:43:24 -07:00
parent 7b3efc6699
commit 0efc02499f
7 changed files with 77 additions and 17 deletions
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13
include/spi_flash.h
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@@ -67,6 +67,19 @@ struct spi_flash {
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode);
/**
* Set up a new SPI flash from an fdt node
*
* @param blob Device tree blob
* @param slave_node Pointer to this SPI slave node in the device tree
* @param spi_node Cached pointer to the SPI interface this node belongs
* to
* @return 0 if ok, -1 on error
*/
struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
int spi_node);
void spi_flash_free(struct spi_flash *flash);
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,