[PATCH 5/6] commands: drvinfo: support filtering by driver

[Ahmad Fatoum]

drvinfo can be very long especially for the in-tree defconfigs,
add optional filtering support:

  barebox@board:/ drvinfo imx7d
  Driver  Device(s)
  --------------------
  imx7d-src
          30390000.reset-control...@30390000.of
  imx7d_adc
          30610000....@30610000.of
          30620000....@30620000.of

  Use 'devinfo DEVICE' for more information

Signed-off-by: Ahmad Fatoum <a.fat...@pengutronix.de>
---
 commands/drvinfo.c | 13 +++++++++++++
 common/complete.c  | 21 +++++++++++++++++++++
 include/complete.h |  1 +
 3 files changed, 35 insertions(+)

diff --git a/commands/drvinfo.c b/commands/drvinfo.c
index 9f8f971ee9dd..27ff55f01d90 100644
--- a/commands/drvinfo.c
+++ b/commands/drvinfo.c
@@ -5,15 +5,23 @@
 #include <common.h>
 #include <command.h>
 #include <driver.h>
+#include <complete.h>
 
 static int do_drvinfo(int argc, char *argv[])
 {
+       char *filter = NULL;
        struct driver_d *drv;
        struct device_d *dev;
 
+       if (IS_ENABLED(CONFIG_AUTO_COMPLETE) && argc > 1)
+               filter = strjoin(" ", &argv[1], argc - 1);
+
        printf("Driver\tDevice(s)\n");
        printf("--------------------\n");
        for_each_driver(drv) {
+               if (filter && !str_has_prefix(drv->name, filter))
+                       continue;
+
                printf("%s\n",drv->name);
                for_each_device(dev) {
                        if (dev->driver == drv)
@@ -24,6 +32,7 @@ static int do_drvinfo(int argc, char *argv[])
        if (IS_ENABLED(CONFIG_CMD_DEVINFO))
                printf("\nUse 'devinfo DEVICE' for more information\n");
 
+       free(filter);
        return 0;
 }
 
@@ -31,5 +40,9 @@ static int do_drvinfo(int argc, char *argv[])
 BAREBOX_CMD_START(drvinfo)
        .cmd            = do_drvinfo,
        BAREBOX_CMD_DESC("list compiled-in device drivers")
+#ifdef CONFIG_AUTO_COMPLETE
+       BAREBOX_CMD_OPTS("[DRIVER]")
+#endif
        BAREBOX_CMD_GROUP(CMD_GRP_INFO)
+       BAREBOX_CMD_COMPLETE(driver_complete)
 BAREBOX_CMD_END
diff --git a/common/complete.c b/common/complete.c
index ab3c98549314..916d13d776ce 100644
--- a/common/complete.c
+++ b/common/complete.c
@@ -174,6 +174,27 @@ static int device_param_complete(struct device_d *dev, 
struct string_list *sl,
        return 0;
 }
 
+int driver_complete(struct string_list *sl, char *instr)
+{
+       struct driver_d *drv;
+       int len;
+
+       if (!instr)
+               instr = "";
+
+       len = strlen(instr);
+
+       for_each_driver(drv) {
+               if (strncmp(instr, drv->name, len))
+                       continue;
+
+               string_list_add_asprintf(sl, "%s ", drv->name);
+       }
+
+       return COMPLETE_CONTINUE;
+}
+EXPORT_SYMBOL(driver_complete);
+
 int empty_complete(struct string_list *sl, char *instr)
 {
        return COMPLETE_END;
diff --git a/include/complete.h b/include/complete.h
index b0e675b5599f..2068760ac235 100644
--- a/include/complete.h
+++ b/include/complete.h
@@ -14,6 +14,7 @@ void complete_reset(void);
 
 int command_complete(struct string_list *sl, char *instr);
 int device_complete(struct string_list *sl, char *instr);
+int driver_complete(struct string_list *sl, char *instr);
 int empty_complete(struct string_list *sl, char *instr);
 int eth_complete(struct string_list *sl, char *instr);
 int command_var_complete(struct string_list *sl, char *instr);
-- 
2.30.2