command_registration: add empty usage field to chained commands

[openocd.git] / src / jtag / drivers / dummy.c

diff --git a/src/jtag/drivers/dummy.c b/src/jtag/drivers/dummy.c
index 0f7c12dd49cae13f6bf42b24db0e0473947108b5..4e5b6152c8d7beb06dbc1ea41be65f7da116860a 100644 (file)
--- a/src/jtag/drivers/dummy.c
+++ b/src/jtag/drivers/dummy.c
@@ -33,14 +33,14 @@ static int clock_count;             /* count clocks in any stable state, only stable states
 
 static uint32_t dummy_data;
 
-static int dummy_read(void)
+static bb_value_t dummy_read(void)
 {
        int data = 1 & dummy_data;
        dummy_data = (dummy_data >> 1) | (1 << 31);
-       return data;
+       return data ? BB_HIGH : BB_LOW;
 }
 
-static void dummy_write(int tck, int tms, int tdi)
+static int dummy_write(int tck, int tms, int tdi)
 {
        /* TAP standard: "state transitions occur on rising edge of clock" */
        if (tck != dummy_clock) {
@@ -69,9 +69,10 @@ static void dummy_write(int tck, int tms, int tdi)
                }
                dummy_clock = tck;
        }
+       return ERROR_OK;
 }
 
-static void dummy_reset(int trst, int srst)
+static int dummy_reset(int trst, int srst)
 {
        dummy_clock = 0;
 
@@ -79,10 +80,12 @@ static void dummy_reset(int trst, int srst)
                dummy_state = TAP_RESET;
 
        LOG_DEBUG("reset to: %s", tap_state_name(dummy_state));
+       return ERROR_OK;
 }
 
-static void dummy_led(int on)
+static int dummy_led(int on)
 {
+       return ERROR_OK;
 }
 
 static struct bitbang_interface dummy_bitbang = {
@@ -133,8 +136,8 @@ static const struct command_registration dummy_command_handlers[] = {
                .name = "dummy",
                .mode = COMMAND_ANY,
                .help = "dummy interface driver commands",
-
                .chain = hello_command_handlers,
+               .usage = "",
        },
        COMMAND_REGISTRATION_DONE,
 };