[PATCH 1/1] hw: allow write_enable latch get/set

[Iris Chen]

---
 hw/block/m25p80.c             | 30 ++++++++++++++++++++++++++++++
 tests/qtest/aspeed_smc-test.c | 20 ++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 430d1298a8..fb72704e5a 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -35,6 +35,7 @@
 #include "qapi/error.h"
 #include "trace.h"
 #include "qom/object.h"
+#include "qapi/visitor.h"
 
 /* Fields for FlashPartInfo->flags */
 
@@ -1646,6 +1647,31 @@ static const VMStateDescription vmstate_m25p80 = {
     }
 };
 
+static void m25p80_get_wel(Object *obj, Visitor *v, const char *name,
+                            void *opaque, Error **errp)
+{
+    Flash *s = M25P80(obj);
+
+    assert(strcmp(name, "WEL") == 0);
+
+    visit_type_bool(v, name, &s->write_enable, errp);
+}
+
+static void m25p80_set_wel(Object *obj, Visitor *v, const char *name,
+                            void *opaque, Error **errp)
+{
+    Flash *s = M25P80(obj);
+    bool value;
+
+    assert(strcmp(name, "WEL") == 0);
+
+    if (!visit_type_bool(v, name, &value, errp)) {
+        return;
+    }
+
+    s->write_enable = value;
+}
+
 static void m25p80_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1660,6 +1686,10 @@ static void m25p80_class_init(ObjectClass *klass, void 
*data)
     device_class_set_props(dc, m25p80_properties);
     dc->reset = m25p80_reset;
     mc->pi = data;
+
+    object_class_property_add(klass, "WEL", "bool",
+                            m25p80_get_wel,
+                            m25p80_set_wel, NULL, NULL);
 }
 
 static const TypeInfo m25p80_info = {
diff --git a/tests/qtest/aspeed_smc-test.c b/tests/qtest/aspeed_smc-test.c
index 87b40a0ef1..af885a9c9d 100644
--- a/tests/qtest/aspeed_smc-test.c
+++ b/tests/qtest/aspeed_smc-test.c
@@ -49,6 +49,7 @@
  */
 enum {
     JEDEC_READ = 0x9f,
+    RDSR = 0x5,
     BULK_ERASE = 0xc7,
     READ = 0x03,
     PP = 0x02,
@@ -348,6 +349,24 @@ static void test_write_page_mem(void)
     flash_reset();
 }
 
+static void test_read_status_reg(void)
+{
+    uint8_t r;
+
+       qmp("{ 'execute': 'qom-set', 'arguments': "
+       "{'path': '/machine/soc/fmc/ssi.0/child[0]', 'property': 'WEL', 
'value': true}}");
+
+    spi_conf(CONF_ENABLE_W0);
+       spi_ctrl_start_user();
+       writeb(ASPEED_FLASH_BASE, RDSR);
+       r = readb(ASPEED_FLASH_BASE);
+       spi_ctrl_stop_user();
+
+       g_assert_cmphex(r, ==, 0x2);
+
+       flash_reset();
+}
+
 static char tmp_path[] = "/tmp/qtest.m25p80.XXXXXX";
 
 int main(int argc, char **argv)
@@ -373,6 +392,7 @@ int main(int argc, char **argv)
     qtest_add_func("/ast2400/smc/write_page", test_write_page);
     qtest_add_func("/ast2400/smc/read_page_mem", test_read_page_mem);
     qtest_add_func("/ast2400/smc/write_page_mem", test_write_page_mem);
+    qtest_add_func("/ast2400/smc/read_status_reg", test_read_status_reg);
 
     ret = g_test_run();
 
-- 
2.30.2