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-rw-r--r--post/drivers/i2c.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/post/drivers/i2c.c b/post/drivers/i2c.c
index e6f4c6a1f2..3080e81b5b 100644
--- a/post/drivers/i2c.c
+++ b/post/drivers/i2c.c
@@ -27,8 +27,12 @@
* For verifying the I2C bus, a full I2C bus scanning is performed.
*
* #ifdef CONFIG_SYS_POST_I2C_ADDRS
- * The test is considered as passed if all the devices and
- * only the devices in the list are found.
+ * The test is considered as passed if all the devices and only the devices
+ * in the list are found.
+ * #ifdef CONFIG_SYS_POST_I2C_IGNORES
+ * Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES. These devices
+ * are optional or not vital to board functionality.
+ * #endif
* #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
* The test is considered as passed if any I2C device is found.
* #endif
@@ -40,12 +44,28 @@
#if CONFIG_POST & CONFIG_SYS_POST_I2C
+static int i2c_ignore_device(unsigned int chip)
+{
+#ifdef CONFIG_SYS_POST_I2C_IGNORES
+ const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
+ int i;
+
+ for (i = 0; i < sizeof(i2c_ignore_list); i++)
+ if (i2c_ignore_list[i] == chip)
+ return 1;
+#endif
+
+ return 0;
+}
+
int i2c_post_test (int flags)
{
unsigned int i;
#ifndef CONFIG_SYS_POST_I2C_ADDRS
/* Start at address 1, address 0 is the general call address */
for (i = 1; i < 128; i++)
+ if (i2c_ignore_device(i))
+ continue;
if (i2c_probe (i) == 0)
return 0;
@@ -58,6 +78,8 @@ int i2c_post_test (int flags)
/* Start at address 1, address 0 is the general call address */
for (i = 1; i < 128; i++) {
+ if (i2c_ignore_device(i))
+ continue;
if (i2c_probe(i) != 0)
continue;
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