flashrom: Fix build with clang

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-bsp/flashrom/flashrom/0001-typecast-enum-conversions-explicitly.patch

@@ -0,0 +1,69 @@
+From 8a236330f2af56bde21e9f69208ea3e59f529f0c Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sun, 15 Mar 2020 17:02:30 -0700
+Subject: [PATCH] typecast enum conversions explicitly
+
+clang complains like below
+
+libflashrom.c:191:43: error: implicit conversion from enumeration type 'const enum test_state' to different enumeration type 'enum flashrom_test_state' [-Werror,-Wenum-conversion]
+                        supported_boards[i].working = binfo[i].working;
+                                                    ~ ~~~~~~~~~^~~~~~~
+libflashrom.c:229:46: error: implicit conversion from enumeration type 'const enum test_state' to different enumeration type 'enum flashrom_test_state' [-Werror,-Wenum-conversion]
+                        supported_chipsets[i].status = chipset[i].status;
+                                                     ~ ~~~~~~~~~~~^~~~~~
+
+However these enums are exactly same so they can be typecasted
+
+libflashrom.h
+
+/** @ingroup flashrom-query */
+enum flashrom_test_state {
+        FLASHROM_TESTED_OK  = 0,
+        FLASHROM_TESTED_NT  = 1,
+        FLASHROM_TESTED_BAD = 2,
+        FLASHROM_TESTED_DEP = 3,
+        FLASHROM_TESTED_NA  = 4,
+};
+
+flash.h
+
+enum test_state {
+          OK = 0,
+          NT = 1, /* Not tested */
+          BAD,    /* Known to not work */
+          DEP,    /* Support depends on configuration (e.g. Intel flash descriptor) */
+          NA,     /* Not applicable (e.g. write support on ROM chips) */
+  };
+
+Upstream-Status: Pending
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ libflashrom.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/libflashrom.c b/libflashrom.c
+index 0dec22e..7956685 100644
+--- a/libflashrom.c
++++ b/libflashrom.c
+@@ -188,7 +188,7 @@ struct flashrom_board_info *flashrom_supported_boards(void)
+ 		for (; i < boards_known_size; ++i) {
+ 			supported_boards[i].vendor = binfo[i].vendor;
+ 			supported_boards[i].name = binfo[i].name;
+-			supported_boards[i].working = binfo[i].working;
++			supported_boards[i].working = (enum flashrom_test_state)binfo[i].working;
+ 		}
+ 	} else {
+ 		msg_gerr("Memory allocation error!\n");
+@@ -226,7 +226,7 @@ struct flashrom_chipset_info *flashrom_supported_chipsets(void)
+ 			supported_chipsets[i].chipset = chipset[i].device_name;
+ 			supported_chipsets[i].vendor_id = chipset[i].vendor_id;
+ 			supported_chipsets[i].chipset_id = chipset[i].device_id;
+-			supported_chipsets[i].status = chipset[i].status;
++			supported_chipsets[i].status = (enum flashrom_test_state)chipset[i].status;
+ 	  }
+ 	} else {
+ 		msg_gerr("Memory allocation error!\n");
+-- 
+2.25.1
+

meta-oe/recipes-bsp/flashrom/flashrom_1.2.bb

@@ -6,6 +6,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
 DEPENDS = "pciutils libusb libusb-compat"
 
 SRC_URI = "https://download.flashrom.org/releases/flashrom-v${PV}.tar.bz2 \
+           file://0001-typecast-enum-conversions-explicitly.patch \
            "
 SRC_URI[md5sum] = "7f8e4b87087eb12ecee0fcc5445b4956"
 SRC_URI[sha256sum] = "e1f8d95881f5a4365dfe58776ce821dfcee0f138f75d0f44f8a3cd032d9ea42b"