dac_shell: add device filtering

Add shell device name filtering using DEVICE_API_IS.

Signed-off-by: Fabio Baltieri <[email protected]>

drivers/dac/dac_shell.c

@@ -94,14 +94,31 @@ static int cmd_write_value(const struct shell *sh, size_t argc, char **argv)
 	return 0;
 }
 
+static bool device_is_dac(const struct device *dev)
+{
+	return device_is_ready(dev) && DEVICE_API_IS(dac, dev);
+}
+
+static void device_name_get(size_t idx, struct shell_static_entry *entry)
+{
+	const struct device *dev = shell_device_filter(idx, device_is_dac);
+
+	entry->syntax = (dev != NULL) ? dev->name : NULL;
+	entry->handler = NULL;
+	entry->help = NULL;
+	entry->subcmd = NULL;
+}
+
+SHELL_DYNAMIC_CMD_CREATE(dsub_device_name, device_name_get);
+
 SHELL_STATIC_SUBCMD_SET_CREATE(dac_cmds,
-	SHELL_CMD_ARG(setup, NULL,
+	SHELL_CMD_ARG(setup, &dsub_device_name,
 		      "Setup DAC channel\n"
 		      "Usage: setup <device> <channel> <resolution> [-b] [-i]\n"
 		      "-b Enable output buffer\n"
 		      "-i Connect internally",
 		      cmd_setup, 4, 2),
-	SHELL_CMD_ARG(write_value, NULL,
+	SHELL_CMD_ARG(write_value, &dsub_device_name,
 		      "Write DAC value\n"
 		      "Usage: write <device> <channel> <value>",
 		      cmd_write_value, 4, 0),