From: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Date: Thu, 19 Aug 2021 09:57:05 +0000 (+0200)
Subject: sandbox: add test of wdt_gpio driver
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=a9346b93b4c19003a8b14393811e1eb6063f0ed4;p=u-boot.git

sandbox: add test of wdt_gpio driver

It seems that no other test has claimed gpio_a:7 yet, so use that.

The only small wrinkle is modifying the existing wdt test to use
uclass_get_device_by_driver() since we now have two UCLASS_WDT
instances in play, so it's a little more robust to fetch the device by
driver and not merely uclass+index.

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
---

diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 962bdbe556..e91387a81f 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -793,6 +793,12 @@
 		};
 	};
 
+	gpio-wdt {
+		gpios = <&gpio_a 7 0>;
+		compatible = "linux,wdt-gpio";
+		always-running;
+	};
+
 	mbox: mbox {
 		compatible = "sandbox,mbox";
 		#mbox-cells = <1>;
diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index 3627a066b4..6cad90b03e 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -225,6 +225,7 @@ CONFIG_SPLASH_SCREEN_ALIGN=y
 CONFIG_VIDEO_BMP_RLE8=y
 # CONFIG_WATCHDOG_AUTOSTART is not set
 CONFIG_WDT=y
+CONFIG_WDT_GPIO=y
 CONFIG_WDT_SANDBOX=y
 CONFIG_FS_CBFS=y
 CONFIG_FS_CRAMFS=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index ec6b1c23c2..2b8d14729b 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -283,6 +283,7 @@ CONFIG_W1_EEPROM=y
 CONFIG_W1_EEPROM_SANDBOX=y
 # CONFIG_WATCHDOG_AUTOSTART is not set
 CONFIG_WDT=y
+CONFIG_WDT_GPIO=y
 CONFIG_WDT_SANDBOX=y
 CONFIG_FS_CBFS=y
 CONFIG_FS_CRAMFS=y
diff --git a/test/dm/wdt.c b/test/dm/wdt.c
index 24b991dff6..abff853a02 100644
--- a/test/dm/wdt.c
+++ b/test/dm/wdt.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <dm.h>
 #include <wdt.h>
+#include <asm/gpio.h>
 #include <asm/state.h>
 #include <asm/test.h>
 #include <dm/test.h>
@@ -19,7 +20,8 @@ static int dm_test_wdt_base(struct unit_test_state *uts)
 	struct udevice *dev;
 	const u64 timeout = 42;
 
-	ut_assertok(uclass_get_device(UCLASS_WDT, 0, &dev));
+	ut_assertok(uclass_get_device_by_driver(UCLASS_WDT,
+						DM_DRIVER_GET(wdt_sandbox), &dev));
 	ut_assertnonnull(dev);
 	ut_asserteq(0, state->wdt.counter);
 	ut_asserteq(false, state->wdt.running);
@@ -39,3 +41,35 @@ static int dm_test_wdt_base(struct unit_test_state *uts)
 	return 0;
 }
 DM_TEST(dm_test_wdt_base, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+
+static int dm_test_wdt_gpio(struct unit_test_state *uts)
+{
+	/*
+	 * The sandbox wdt gpio is "connected" to gpio bank a, offset
+	 * 7. Use the sandbox back door to verify that the gpio-wdt
+	 * driver behaves as expected.
+	 */
+	struct udevice *wdt, *gpio;
+	const u64 timeout = 42;
+	const int offset = 7;
+	int val;
+
+	ut_assertok(uclass_get_device_by_driver(UCLASS_WDT,
+						DM_DRIVER_GET(wdt_gpio), &wdt));
+	ut_assertnonnull(wdt);
+
+	ut_assertok(uclass_get_device_by_name(UCLASS_GPIO, "base-gpios", &gpio));
+	ut_assertnonnull(gpio);
+	ut_assertok(wdt_start(wdt, timeout, 0));
+
+	val = sandbox_gpio_get_value(gpio, offset);
+	ut_assertok(wdt_reset(wdt));
+	ut_asserteq(!val, sandbox_gpio_get_value(gpio, offset));
+	ut_assertok(wdt_reset(wdt));
+	ut_asserteq(val, sandbox_gpio_get_value(gpio, offset));
+
+	ut_asserteq(-ENOSYS, wdt_stop(wdt));
+
+	return 0;
+}
+DM_TEST(dm_test_wdt_gpio, UT_TESTF_SCAN_FDT);