From 0efc02499f9131bd7e1689ebb8d626ef12387de4 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 3 Dec 2013 16:43:24 -0700 Subject: 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 --- drivers/spi/spi.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/spi/spi.c') diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index b76a26cef0..7ddea9b026 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -5,6 +5,7 @@ */ #include +#include #include #include @@ -37,3 +38,21 @@ void *spi_do_alloc_slave(int offset, int size, unsigned int bus, return ptr; } + +#ifdef CONFIG_OF_SPI +struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum, + int node) +{ + int cs, max_hz, mode = 0; + + cs = fdtdec_get_int(blob, node, "reg", -1); + max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000); + if (fdtdec_get_bool(blob, node, "spi-cpol")) + mode |= SPI_CPOL; + if (fdtdec_get_bool(blob, node, "spi-cpha")) + mode |= SPI_CPHA; + if (fdtdec_get_bool(blob, node, "spi-cs-high")) + mode |= SPI_CS_HIGH; + return spi_setup_slave(busnum, cs, max_hz, mode); +} +#endif -- cgit v1.2.1