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dm: Simple Watchdog uclass

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This is a simple uclass for Watchdog Timers. It has four operations:
start, restart, reset, stop. Drivers must implement start, restart and
stop operations, while implementing reset is optional: It's default
implementation expires watchdog timer in one clock tick.

Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
maxims@google.com
2017-04-17 12:00:21 -07:00
committed by Tom Rini
parent 17c5fb1953
commit 0753bc2d30
11 changed files with 333 additions and 1 deletions
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1
test/dm/Makefile
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@@ -42,4 +42,5 @@ obj-$(CONFIG_TIMER) += timer.o
obj-$(CONFIG_DM_VIDEO) += video.o
obj-$(CONFIG_ADC) += adc.o
obj-$(CONFIG_SPMI) += spmi.o
obj-$(CONFIG_WDT) += wdt.o
endif

40
test/dm/wdt.c Normal file
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@@ -0,0 +1,40 @@
/*
* Copyright 2017 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <wdt.h>
#include <asm/state.h>
#include <asm/test.h>
#include <dm/test.h>
#include <test/ut.h>
/* Test that watchdog driver functions are called */
static int dm_test_wdt_base(struct unit_test_state *uts)
{
struct sandbox_state *state = state_get_current();
struct udevice *dev;
const u64 timeout = 42;
ut_assertok(uclass_get_device(UCLASS_WDT, 0, &dev));
ut_asserteq(0, state->wdt.counter);
ut_asserteq(false, state->wdt.running);
ut_assertok(wdt_start(dev, timeout, 0));
ut_asserteq(timeout, state->wdt.counter);
ut_asserteq(true, state->wdt.running);
uint reset_count = state->wdt.reset_count;
ut_assertok(wdt_reset(dev));
ut_asserteq(reset_count + 1, state->wdt.reset_count);
ut_asserteq(true, state->wdt.running);
ut_assertok(wdt_stop(dev));
ut_asserteq(false, state->wdt.running);
return 0;
}
DM_TEST(dm_test_wdt_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);