Patchwork [U-Boot,v2,09/15] x86: spi: Set maximum write size for ICH

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Submitter Simon Glass
Date March 11, 2013, 4:08 p.m.
Message ID <1363018093-28979-10-git-send-email-sjg@chromium.org>
Download mbox | patch
Permalink /patch/226591/
State Accepted, archived
Delegated to: Tom Rini
Headers show

Comments

Simon Glass - March 11, 2013, 4:08 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>
---
Changes in v2: None

 drivers/spi/ich.c | 5 +++++
 1 file changed, 5 insertions(+)

Patch

diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index 9f8eab2..15213d9 100644
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -147,6 +147,11 @@  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;