board: gazerbeam: Fix SC detection

The single channel detection in the gazerbeam board driver was not
implemented correctly.

Fix the detection.

Signed-off-by: Mario Six <mario.six@gdsys.cc>

diff --git a/drivers/board/gazerbeam.c b/drivers/board/gazerbeam.c
index 481cce8e809f1704d54f1156f56e75dfe842c10d..85de4e440cec551177a4aa772ec43d8013e5a87e 100644 (file)
--- a/drivers/board/gazerbeam.c
+++ b/drivers/board/gazerbeam.c
@@ -61,7 +61,7 @@ static int _read_board_variant_data(struct udevice *dev)
        struct udevice *i2c_bus;
        struct udevice *dummy;
        char *listname;
-       int mc4, mc2, sc, con;
+       int mc4, mc2, sc, mc2_sc, con;
        int gpio_num;
        int res;
 
@@ -78,16 +78,16 @@ static int _read_board_variant_data(struct udevice *dev)
                return -EIO;
        }
 
-       mc2 = !dm_i2c_probe(i2c_bus, MC2_EXPANDER_ADDR, 0, &dummy);
+       mc2_sc = !dm_i2c_probe(i2c_bus, MC2_EXPANDER_ADDR, 0, &dummy);
        mc4 = !dm_i2c_probe(i2c_bus, MC4_EXPANDER_ADDR, 0, &dummy);
 
-       if (mc2 && mc4) {
+       if (mc2_sc && mc4) {
                debug("%s: Board hardware configuration inconsistent.\n",
                      dev->name);
                return -EINVAL;
        }
 
-       listname = mc2 ? "var-gpios-mc2" : "var-gpios-mc4";
+       listname = mc2_sc ? "var-gpios-mc2" : "var-gpios-mc4";
 
        gpio_num = gpio_request_list_by_name(dev, listname, priv->var_gpios,
                                             ARRAY_SIZE(priv->var_gpios),
@@ -105,12 +105,7 @@ static int _read_board_variant_data(struct udevice *dev)
                return sc;
        }
 
-       con = dm_gpio_get_value(&priv->var_gpios[CON_GPIO_NO]);
-       if (con < 0) {
-               debug("%s: Error while reading 'con' GPIO (err = %d)",
-                     dev->name, con);
-               return con;
-       }
+       mc2 = mc2_sc ? (sc ? 0 : 1) : 0;
 
        if ((sc && mc2) || (sc && mc4) || (!sc && !mc2 && !mc4)) {
                debug("%s: Board hardware configuration inconsistent.\n",
@@ -118,6 +113,13 @@ static int _read_board_variant_data(struct udevice *dev)
                return -EINVAL;
        }
 
+       con = dm_gpio_get_value(&priv->var_gpios[CON_GPIO_NO]);
+       if (con < 0) {
+               debug("%s: Error while reading 'con' GPIO (err = %d)",
+                     dev->name, con);
+               return con;
+       }
+
        priv->variant = con ? VAR_CON : VAR_CPU;
 
        priv->multichannel = mc4 ? 4 : (mc2 ? 2 : (sc ? 1 : 0));