core: add ofnode_get_by_phandle() api

[people/ms/u-boot.git] / post / drivers / i2c.c

diff --git a/post/drivers/i2c.c b/post/drivers/i2c.c
index e6f4c6a1f213d4894c8bab43f18ff2a607d13c93..95da2ebdaf528b191bb4c2d83235d4381779869e 100644 (file)
--- a/post/drivers/i2c.c
+++ b/post/drivers/i2c.c
@@ -2,23 +2,7 @@
  * (C) Copyright 2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 /*
@@ -27,8 +11,12 @@
  * 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
@@ -40,24 +28,43 @@
 
 #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++)
+       for (i = 1; i < 128; i++) {
+               if (i2c_ignore_device(i))
+                       continue;
                if (i2c_probe (i) == 0)
                        return 0;
+       }
 
        /* No devices found */
        return -1;
 #else
        unsigned int ret  = 0;
        int j;
-       const unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
+       unsigned char i2c_addr_list[] = 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)
                        continue;
 
@@ -77,6 +84,8 @@ int i2c_post_test (int flags)
        for (i = 0; i < sizeof(i2c_addr_list); ++i) {
                if (i2c_addr_list[i] == 0xff)
                        continue;
+               if (i2c_ignore_device(i2c_addr_list[i]))
+                       continue;
                post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
                ret = -1;
        }