When the functions "eeprom_read" and "eeprom_write" works for the SPI flash, the data length is limited to I2C_RXTX_LEN. See the following piece of code. ----------------------------- #if !defined(CFG_I2C_FRAM) maxlen = 0x100 - blk_off; if (maxlen > I2C_RXTX_LEN) maxlen = I2C_RXTX_LEN;
if (len > maxlen) len = maxlen; #endif -----------------------------
The following patch fixes this issue.
From 2451cc87059acc456597a28f802ab3acb2d61ad4 Mon Sep 17 00:00:00 2001
From: Aubrey Li aubrey.adi@gmail.com Date: Thu, 22 Mar 2007 17:26:27 +0800 Subject: [PATCH] Fix spi read/write length issue
Signed-off-by: Aubrey Li aubrey.adi@gmail.com --- common/cmd_eeprom.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c index d15a412..71d9792 100644 --- a/common/cmd_eeprom.c +++ b/common/cmd_eeprom.c @@ -177,10 +177,14 @@ int eeprom_read (unsigned dev_addr, unsi maxlen = 0x100 - blk_off; if (maxlen > I2C_RXTX_LEN) maxlen = I2C_RXTX_LEN; + +#ifndef CONFIG_SPI if (len > maxlen) len = maxlen; #endif
+#endif + #ifdef CONFIG_SPI spi_read (addr, alen, buffer, len); #else @@ -273,10 +277,13 @@ int eeprom_write (unsigned dev_addr, uns if (maxlen > I2C_RXTX_LEN) maxlen = I2C_RXTX_LEN;
+#ifndef CONFIG_SPI if (len > maxlen) len = maxlen; #endif
+#endif + #ifdef CONFIG_SPI spi_write (addr, alen, buffer, len); #else