Patchwork [U-Boot,10/15] x86: spi: Set maximum write size for ICH

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Submitter Simon Glass
Date Dec. 26, 2012, 10:28 p.m.
Message ID <1356560913-2205-11-git-send-email-sjg@chromium.org>
Download mbox | patch
Permalink /patch/208231/
State Superseded, archived
Delegated to: Simon Glass
Headers show

Comments

Simon Glass - Dec. 26, 2012, 10:28 p.m.
This SPI controller can only write 64 bytes at a time. Add this restriction
in so that 'sf write' works correct for blocks larger than 64 bytes.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 drivers/spi/ich.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

Patch

diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index 31f9482..17defa4 100644
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -166,6 +166,11 @@  struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 	}
 
+	/*
+	 * Yes this controller can only write a small number of bytes at
+	 * once! The limit is typically 64 bytes.
+	 */
+	ich->slave.max_write_size = ctlr.databytes;
 	ich->speed = max_hz;
 
 	return &ich->slave;