drivers: Consistently use the same method to check for !cg.

[libsigrok.git] / src / hardware / hung-chang-dso-2100 / api.c

diff --git a/src/hardware/hung-chang-dso-2100/api.c b/src/hardware/hung-chang-dso-2100/api.c
index 4386053d3d2f8a4639a6c6b52446a452d73945c2..a16eb8993f6beb39c25731b80c02a52eb9b0ea8d 100644 (file)
--- a/src/hardware/hung-chang-dso-2100/api.c
+++ b/src/hardware/hung-chang-dso-2100/api.c
@@ -319,7 +319,7 @@ static int config_get(uint32_t key, GVariant **data,
                *data = g_variant_new_uint64(buffersizes[devc->last_step]);
                break;
        case SR_CONF_VDIV:
-               if (ch == -1) {
+               if (!cg) {
                        return SR_ERR_CHANNEL_GROUP;
                } else {
                        if ((idx = std_u8_idx_s(devc->cctl[ch] & 0x33, ARRAY_AND_SIZE(vdivs_map))) < 0)
@@ -328,7 +328,7 @@ static int config_get(uint32_t key, GVariant **data,
                }
                break;
        case SR_CONF_COUPLING:
-               if (ch == -1) {
+               if (!cg) {
                        return SR_ERR_CHANNEL_GROUP;
                } else {
                        if ((idx = std_u8_idx_s(devc->cctl[ch] & 0x0C, ARRAY_AND_SIZE(coupling_map))) < 0)
@@ -337,7 +337,7 @@ static int config_get(uint32_t key, GVariant **data,
                }
                break;
        case SR_CONF_PROBE_FACTOR:
-               if (ch == -1)
+               if (!cg)
                        return SR_ERR_CHANNEL_GROUP;
                else
                        *data = g_variant_new_uint64(devc->probe[ch]);
@@ -384,7 +384,7 @@ static int config_set(uint32_t key, GVariant *data,
                devc->last_step = idx;
                break;
        case SR_CONF_VDIV:
-               if (ch == -1) {
+               if (!cg) {
                        return SR_ERR_CHANNEL_GROUP;
                } else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
                        return SR_ERR_ARG;
@@ -395,7 +395,7 @@ static int config_set(uint32_t key, GVariant *data,
                }
                break;
        case SR_CONF_COUPLING:
-               if (ch == -1) {
+               if (!cg) {
                        return SR_ERR_CHANNEL_GROUP;
                } else {
                        if ((idx = std_str_idx(data, ARRAY_AND_SIZE(coupling))) < 0)
@@ -404,7 +404,7 @@ static int config_set(uint32_t key, GVariant *data,
                }
                break;
        case SR_CONF_PROBE_FACTOR:
-               if (ch == -1) {
+               if (!cg) {
                        return SR_ERR_CHANNEL_GROUP;
                } else {
                        u = g_variant_get_uint64(data);