[PATCH v2 11/25] tests/qtest: tmp105: cover shutdown clearing the ALERT across variants

Verify that entering shutdown clears the ALERT/OS output in interrupt
mode but leaves it asserted in comparator mode, for both the TMP75 and
the LM75B.

Signed-off-by: Emmanuel Blot <[email protected]>
---
 tests/qtest/tmp105-test.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/tests/qtest/tmp105-test.c b/tests/qtest/tmp105-test.c
index e586a634d8..504f6b7202 100644
--- a/tests/qtest/tmp105-test.c
+++ b/tests/qtest/tmp105-test.c
@@ -335,6 +335,41 @@ static void test_tmp75_tm_clears_alert(void *obj, void *data,
     g_assert_false(get_irq(0));
 }
 
+/*
+ * Entering shutdown clears the ALERT in interrupt mode but leaves it asserted
+ * in comparator mode.
+ */
+static void test_tmp75_shutdown_clears_alert(void *obj, void *data,
+                                             QGuestAllocator *alloc)
+{
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+    int i;
+
+    qtest_irq_intercept_out(global_qtest, TMP75_TEST_PATH);
+
+    i2c_set8(i2cdev, TMP105_REG_CONFIG,
+             TMP105_CONFIG_POL | TMP105_CONFIG_TM | TMP105_CONFIG_FQ(3));
+    for (i = 0; i < 4; i++) {
+        qmp_tmp105_set_temperature(TMP75_TEST_ID, 85000);
+    }
+    g_assert_true(get_irq(0));
+
+    i2c_set8(i2cdev, TMP105_REG_CONFIG,
+             TMP105_CONFIG_POL | TMP105_CONFIG_TM | TMP105_CONFIG_FQ(3) |
+             TMP105_CONFIG_SD);
+    g_assert_false(get_irq(0));
+
+    i2c_set8(i2cdev, TMP105_REG_CONFIG,
+             TMP105_CONFIG_POL | TMP105_CONFIG_FQ(3));
+    for (i = 0; i < 4; i++) {
+        qmp_tmp105_set_temperature(TMP75_TEST_ID, 85000);
+    }
+    g_assert_true(get_irq(0));
+    i2c_set8(i2cdev, TMP105_REG_CONFIG,
+             TMP105_CONFIG_POL | TMP105_CONFIG_FQ(3) | TMP105_CONFIG_SD);
+    g_assert_true(get_irq(0));
+}
+
 /*
  * The LM75B has a fixed 11-bit (0.125 C) converter: the resolution and one-shot
  * Config bits are reserved (read/write as zero) and the temperature register is
@@ -367,6 +402,23 @@ static void test_lm75b_limits(void *obj, void *data,
     g_assert_cmphex(i2c_get16(i2cdev, TMP105_REG_T_LOW), ==, 0x1280);
 }
 
+/* The LM75B likewise resets its OS output on shutdown in interrupt mode. */
+static void test_lm75b_shutdown_clears_alert(void *obj, void *data,
+                                             QGuestAllocator *alloc)
+{
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    qtest_irq_intercept_out(global_qtest, LM75B_TEST_PATH);
+
+    i2c_set8(i2cdev, TMP105_REG_CONFIG, TMP105_CONFIG_POL | TMP105_CONFIG_TM);
+    qmp_tmp105_set_temperature(LM75B_TEST_ID, 85000);
+    g_assert_true(get_irq(0));
+
+    i2c_set8(i2cdev, TMP105_REG_CONFIG,
+             TMP105_CONFIG_POL | TMP105_CONFIG_TM | TMP105_CONFIG_SD);
+    g_assert_false(get_irq(0));
+}
+
 static void tmp105_register_nodes(void)
 {
     QOSGraphEdgeOptions opts = {
@@ -396,6 +448,8 @@ static void tmp105_register_nodes(void)
 
     qos_add_test("fault-queue", "tmp75", test_tmp75_fault_queue, NULL);
     qos_add_test("tm-clears-alert", "tmp75", test_tmp75_tm_clears_alert, NULL);
+    qos_add_test("shutdown-clears-alert", "tmp75",
+                 test_tmp75_shutdown_clears_alert, NULL);
 
     /* TMP175: like the TMP105, with a 1/2/4/6 fault queue. */
     QOSGraphEdgeOptions tmp175_opts = {
@@ -419,5 +473,7 @@ static void tmp105_register_nodes(void)
 
     qos_add_test("resolution", "lm75b", test_lm75b_resolution, NULL);
     qos_add_test("limits", "lm75b", test_lm75b_limits, NULL);
+    qos_add_test("shutdown-clears-alert", "lm75b",
+                 test_lm75b_shutdown_clears_alert, NULL);
 }
 libqos_init(tmp105_register_nodes);

-- 
2.50.1