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path: root/drivers/i2c/soft_i2c.c
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Diffstat (limited to 'drivers/i2c/soft_i2c.c')
-rw-r--r--drivers/i2c/soft_i2c.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/i2c/soft_i2c.c b/drivers/i2c/soft_i2c.c
index a27de5a..da6cec1 100644
--- a/drivers/i2c/soft_i2c.c
+++ b/drivers/i2c/soft_i2c.c
@@ -385,8 +385,18 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
}
shift -= 8;
}
- send_stop(); /* reportedly some chips need a full stop */
+
+ /* Some I2C chips need a stop/start sequence here,
+ * other chips don't work with a full stop and need
+ * only a start. Default behaviour is to send the
+ * stop/start sequence.
+ */
+#ifdef CONFIG_SOFT_I2C_READ_REPEATED_START
send_start();
+#else
+ send_stop();
+ send_start();
+#endif
}
/*
* Send the chip address again, this time for a read cycle.