simplify clobber behavior with out-of-tree builds

[karo-tx-uboot.git] / common / cmd_i2c.c

diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index 371e022f79e90ed450d1ec09d65e11e99efefcf9..d913e13665b41728fbbd953c17db5c7ae0ac1026 100644 (file)
--- a/common/cmd_i2c.c
+++ b/common/cmd_i2c.c
@@ -132,6 +132,14 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define DISP_LINE_LEN  16
 
+/* implement possible board specific board init */
+void __def_i2c_init_board(void)
+{
+       return;
+}
+void i2c_init_board(void)
+       __attribute__((weak, alias("__def_i2c_init_board")));
+
 /* TODO: Implement architecture-specific get/set functions */
 unsigned int __def_i2c_get_bus_speed(void)
 {
@@ -152,7 +160,7 @@ int i2c_set_bus_speed(unsigned int)
 
 /*
  * get_alen: small parser helper function to get address length
- * returns the address length,or 0 on error
+ * returns the address length
  */
 static uint get_alen(char *arg)
 {
@@ -163,9 +171,6 @@ static uint get_alen(char *arg)
        for (j = 0; j < 8; j++) {
                if (arg[j] == '.') {
                        alen = arg[j+1] - '0';
-                       if (alen > 3) {
-                               return 0;
-                       }
                        break;
                } else if (arg[j] == '\0')
                        break;
@@ -198,7 +203,7 @@ static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv
         */
        devaddr = simple_strtoul(argv[2], NULL, 16);
        alen = get_alen(argv[2]);
-       if (alen == 0)
+       if (alen > 3)
                return cmd_usage(cmdtp);
 
        /*
@@ -255,7 +260,7 @@ static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]
                 */
                addr = simple_strtoul(argv[2], NULL, 16);
                alen = get_alen(argv[2]);
-               if (alen == 0)
+               if (alen > 3)
                        return cmd_usage(cmdtp);
 
                /*
@@ -337,7 +342,7 @@ static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]
         */
        addr = simple_strtoul(argv[2], NULL, 16);
        alen = get_alen(argv[2]);
-       if (alen == 0)
+       if (alen > 3)
                return cmd_usage(cmdtp);
 
        /*
@@ -399,7 +404,7 @@ static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]
         */
        addr = simple_strtoul(argv[2], NULL, 16);
        alen = get_alen(argv[2]);
-       if (alen == 0)
+       if (alen > 3)
                return cmd_usage(cmdtp);
 
        /*
@@ -477,7 +482,7 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const arg
                 */
                addr = simple_strtoul(argv[2], NULL, 16);
                alen = get_alen(argv[2]);
-               if (alen == 0)
+               if (alen > 3)
                        return cmd_usage(cmdtp);
        }
 
@@ -621,7 +626,7 @@ static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]
         */
        addr = simple_strtoul(argv[2], NULL, 16);
        alen = get_alen(argv[2]);
-       if (alen == 0)
+       if (alen > 3)
                return cmd_usage(cmdtp);
 
        /*
@@ -1287,10 +1292,19 @@ static cmd_tbl_t cmd_i2c_sub[] = {
        U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
 };
 
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+void i2c_reloc(void) {
+       fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
+}
+#endif
+
 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
        cmd_tbl_t *c;
 
+       if (argc < 2)
+               return cmd_usage(cmdtp);
+
        /* Strip off leading 'i2c' command argument */
        argc--;
        argv++;
@@ -1535,6 +1549,8 @@ int i2x_mux_select_mux(int bus)
 
        mux = dev->mux;
        while (mux != NULL) {
+               /* do deblocking on each level of mux, before mux config */
+               i2c_init_board();
                if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) {
                        printf ("Error setting Mux: chip:%x channel: \
                                %x\n", mux->chip, mux->channel);
@@ -1542,6 +1558,8 @@ int i2x_mux_select_mux(int bus)
                }
                mux = mux->next;
        }
+       /* do deblocking on each level of mux and after mux config */
+       i2c_init_board();
        return 0;
 }
 #endif /* CONFIG_I2C_MUX */