[U-Boot] [PATCH v2] fastboot: getvar: Add "is-userspace" variable

[Sam Protsenko]

As per documentation [1], Android-Q requires for bootloader to provide
"is-userspace" variable. "no" value should be always returned. This
patch implements this fastboot variable.

[1] https://android.googlesource.com/platform/system/core/+/refs/tags/android-q-preview-4/fastboot/README.md

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
---
Changes in v2:
  - use the fixed link for tag instead of floating one for master branch
  - add "getvar:" in the commit title to be more specific

 drivers/fastboot/fb_getvar.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/fastboot/fb_getvar.c b/drivers/fastboot/fb_getvar.c
index 9ee5054485..fd0823b2bf 100644
--- a/drivers/fastboot/fb_getvar.c
+++ b/drivers/fastboot/fb_getvar.c
@@ -28,6 +28,7 @@ static void getvar_partition_type(char *part_name, char *response);
 #if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
 static void getvar_partition_size(char *part_name, char *response);
 #endif
+static void getvar_is_userspace(char *var_parameter, char *response);
 
 static const struct {
 	const char *variable;
@@ -78,6 +79,9 @@ static const struct {
 		.variable = "partition-size",
 		.dispatch = getvar_partition_size
 #endif
+	}, {
+		.variable = "is-userspace",
+		.dispatch = getvar_is_userspace
 	}
 };
 
@@ -243,6 +247,11 @@ static void getvar_partition_size(char *part_name, char *response)
 }
 #endif
 
+static void getvar_is_userspace(char *var_parameter, char *response)
+{
+	fastboot_okay("no", response);
+}
+
 /**
  * fastboot_getvar() - Writes variable indicated by cmd_parameter to response.
  *
-- 
2.20.1