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timer: Add a test for timer_timebase_fallback 

To test this function, sandbox CPU must set cpu_platdata.timebase_freq on
bind. It also needs to expose a method to set the current cpu. I also make
some most members of cpu_sandbox_ops static.

On the timer side, the device tree property
sandbox,timebase-frequency-fallback controls whether sandbox_timer_probe
falls back to time_timebase_fallback or to SANDBOX_TIMER_RATE.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sean Anderson 2020-09-28 10:52:23 -04:00 committed by Andes
parent 3576121687
commit 7616e3687e
5 changed files with 80 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/sandbox/dts/test.dts
View File

@ -533,7 +533,9 @@
};
cpus {
timebase-frequency = <2000000>;
cpu-test1 {
timebase-frequency = <3000000>;
compatible = "sandbox,cpu_sandbox";
u-boot,dm-pre-reloc;
};
@ -839,11 +841,16 @@
0x58 8>;
};
timer {
timer@0 {
compatible = "sandbox,timer";
clock-frequency = <1000000>;
};
timer@1 {
compatible = "sandbox,timer";
sandbox,timebase-frequency-fallback;
};
tpm2 {
compatible = "sandbox,tpm2";
};

11
arch/sandbox/include/asm/cpu.h Normal file
View File

@ -0,0 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
*/
#ifndef __SANDBOX_CPU_H
#define __SANDBOX_CPU_H
void cpu_sandbox_set_current(const char *name);
#endif /* __SANDBOX_CPU_H */

39
drivers/cpu/cpu_sandbox.c
View File

@ -8,14 +8,15 @@
#include <dm.h>
#include <cpu.h>
int cpu_sandbox_get_desc(const struct udevice *dev, char *buf, int size)
static int cpu_sandbox_get_desc(const struct udevice *dev, char *buf, int size)
{
snprintf(buf, size, "LEG Inc. SuperMegaUltraTurbo CPU No. 1");
return 0;
}
int cpu_sandbox_get_info(const struct udevice *dev, struct cpu_info *info)
static int cpu_sandbox_get_info(const struct udevice *dev,
struct cpu_info *info)
{
info->cpu_freq = 42 * 42 * 42 * 42 * 42;
info->features = 0x42424242;
@ -24,21 +25,29 @@ int cpu_sandbox_get_info(const struct udevice *dev, struct cpu_info *info)
return 0;
}
int cpu_sandbox_get_count(const struct udevice *dev)
static int cpu_sandbox_get_count(const struct udevice *dev)
{
return 42;
}
int cpu_sandbox_get_vendor(const struct udevice *dev, char *buf, int size)
static int cpu_sandbox_get_vendor(const struct udevice *dev, char *buf,
int size)
{
snprintf(buf, size, "Languid Example Garbage Inc.");
return 0;
}
int cpu_sandbox_is_current(struct udevice *dev)
static const char *cpu_current = "cpu-test1";
void cpu_sandbox_set_current(const char *name)
{
if (!strcmp(dev->name, "cpu-test1"))
cpu_current = name;
}
static int cpu_sandbox_is_current(struct udevice *dev)
{
if (!strcmp(dev->name, cpu_current))
return 1;
return 0;
@ -52,7 +61,22 @@ static const struct cpu_ops cpu_sandbox_ops = {
.is_current = cpu_sandbox_is_current,
};
int cpu_sandbox_probe(struct udevice *dev)
static int cpu_sandbox_bind(struct udevice *dev)
{
int ret;
struct cpu_platdata *plat = dev_get_parent_platdata(dev);
/* first examine the property in current cpu node */
ret = dev_read_u32(dev, "timebase-frequency", &plat->timebase_freq);
/* if not found, then look at the parent /cpus node */
if (ret)
ret = dev_read_u32(dev->parent, "timebase-frequency",
&plat->timebase_freq);
return ret;
}
static int cpu_sandbox_probe(struct udevice *dev)
{
return 0;
}
@ -67,5 +91,6 @@ U_BOOT_DRIVER(cpu_sandbox) = {
.id = UCLASS_CPU,
.ops = &cpu_sandbox_ops,
.of_match = cpu_sandbox_ids,
.bind = cpu_sandbox_bind,
.probe = cpu_sandbox_probe,
};

4
drivers/timer/sandbox_timer.c
View File

@ -40,7 +40,9 @@ static int sandbox_timer_probe(struct udevice *dev)
{
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
if (!uc_priv->clock_rate)
if (dev_read_bool(dev, "sandbox,timebase-frequency-fallback"))
return timer_timebase_fallback(dev);
else if (!uc_priv->clock_rate)
uc_priv->clock_rate = SANDBOX_TIMER_RATE;
return 0;

27
test/dm/timer.c
View File

@ -7,8 +7,10 @@
#include <dm.h>
#include <timer.h>
#include <dm/test.h>
#include <dm/device-internal.h>
#include <test/test.h>
#include <test/ut.h>
#include <asm/cpu.h>
/*
* Basic test of the timer uclass.
@ -17,9 +19,32 @@ static int dm_test_timer_base(struct unit_test_state *uts)
{
struct udevice *dev;
ut_assertok(uclass_get_device(UCLASS_TIMER, 0, &dev));
ut_assertok(uclass_get_device_by_name(UCLASS_TIMER, "timer@0", &dev));
ut_asserteq(1000000, timer_get_rate(dev));
return 0;
}
DM_TEST(dm_test_timer_base, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/*
* Test of timebase fallback
*/
static int dm_test_timer_timebase_fallback(struct unit_test_state *uts)
{
struct udevice *dev;
cpu_sandbox_set_current("cpu-test1");
ut_assertok(uclass_get_device_by_name(UCLASS_TIMER, "timer@1", &dev));
ut_asserteq(3000000, timer_get_rate(dev));
ut_assertok(device_remove(dev, DM_REMOVE_NORMAL));
cpu_sandbox_set_current("cpu-test2");
ut_assertok(uclass_get_device_by_name(UCLASS_TIMER, "timer@1", &dev));
ut_asserteq(2000000, timer_get_rate(dev));
cpu_sandbox_set_current("cpu-test1");
return 0;
}
DM_TEST(dm_test_timer_timebase_fallback,
UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);