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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-06-29 16:17:33 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-07-14 19:42:49 +0200 |
| commit | 1110495de926db4b21b9969da522e5270c67f115 (patch) | |
| tree | 04a04b6e797173c1b3639a4c4ecb90c544ab84ab /src/soc/intel/fsp_baytrail/spi.c | |
| parent | 77d1280d0c866a9f85e62f74c43fe8d021a4ff39 (diff) | |
SPI: Split writes using spi_crop_chunk()
SPI controllers in Intel and AMD bridges have a slightly different
restriction on how long transactions they can handle.
Change-Id: I3d149d4b7e7e9633482a153d5e380a86c553d871
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6163
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Diffstat (limited to 'src/soc/intel/fsp_baytrail/spi.c')
| -rw-r--r-- | src/soc/intel/fsp_baytrail/spi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/soc/intel/fsp_baytrail/spi.c b/src/soc/intel/fsp_baytrail/spi.c index 50f11231da..4feb502819 100644 --- a/src/soc/intel/fsp_baytrail/spi.c +++ b/src/soc/intel/fsp_baytrail/spi.c @@ -497,6 +497,11 @@ static int ich_status_poll(u16 bitmask, int wait_til_set) return -1; } +unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return min(cntlr.databytes, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bytesout, void *din, unsigned int bytesin) { @@ -585,7 +590,7 @@ int spi_xfer(struct spi_slave *slave, const void *dout, */ if (trans.bytesout > cntlr.databytes) { printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); + " spi_crop_chunk()?\n"); return -1; } |