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test: dm: spi: Add testcase for spi_claim_bus() 

Add testcase for spi_claim_bus(), which checks that sandbox spi bus
speed/mode settings are updated correctly when multiple slaves use
the bus consecutively. The following configurations are used for the
two spi slaves involved:
  * different max_hz / different modes
  * different max_hz / same modes
  * different modes / same max_hz

asm/test.h header is added in order to be able to retrieve the current
speed/mode of the sandbox spi bus, via sandbox_spi_get_{speed, mode}.

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Ovidiu Panait 2020-12-14 19:06:51 +02:00 committed by Simon Glass
parent 741280e9ac
commit a5624c6b4c
1 changed files with 82 additions and 0 deletions
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82
test/dm/spi.c
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@ -9,6 +9,7 @@
#include <spi.h>
#include <spi_flash.h>
#include <asm/state.h>
#include <asm/test.h>
#include <dm/device-internal.h>
#include <dm/test.h>
#include <dm/uclass-internal.h>
@ -91,6 +92,87 @@ static int dm_test_spi_find(struct unit_test_state *uts)
}
DM_TEST(dm_test_spi_find, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/* dm_test_spi_switch_slaves - Helper function to check whether spi_claim_bus
* operates correctly with two spi slaves.
*
* Check that switching back and forth between two slaves claiming the bus
* will update dm_spi_bus->speed and sandbox_spi bus speed/mode correctly.
*
* @uts - unit test state
* @slave_a - first spi slave used for testing
* @slave_b - second spi slave used for testing
*/
static int dm_test_spi_switch_slaves(struct unit_test_state *uts,
struct spi_slave *slave_a,
struct spi_slave *slave_b)
{
struct udevice *bus;
struct dm_spi_bus *bus_data;
/* Check that slaves are on the same bus */
ut_asserteq_ptr(dev_get_parent(slave_a->dev),
dev_get_parent(slave_b->dev));
bus = dev_get_parent(slave_a->dev);
bus_data = dev_get_uclass_priv(bus);
ut_assertok(spi_claim_bus(slave_a));
ut_asserteq(slave_a->max_hz, bus_data->speed);
ut_asserteq(slave_a->max_hz, sandbox_spi_get_speed(bus));
ut_asserteq(slave_a->mode, sandbox_spi_get_mode(bus));
spi_release_bus(slave_a);
ut_assertok(spi_claim_bus(slave_b));
ut_asserteq(slave_b->max_hz, bus_data->speed);
ut_asserteq(slave_b->max_hz, sandbox_spi_get_speed(bus));
ut_asserteq(slave_b->mode, sandbox_spi_get_mode(bus));
spi_release_bus(slave_b);
ut_assertok(spi_claim_bus(slave_a));
ut_asserteq(slave_a->max_hz, bus_data->speed);
ut_asserteq(slave_a->max_hz, sandbox_spi_get_speed(bus));
ut_asserteq(slave_a->mode, sandbox_spi_get_mode(bus));
spi_release_bus(slave_a);
return 0;
}
static int dm_test_spi_claim_bus(struct unit_test_state *uts)
{
struct udevice *bus;
struct spi_slave *slave_a, *slave_b;
struct dm_spi_slave_plat *slave_plat;
const int busnum = 0, cs_a = 0, cs_b = 1, mode = 0;
/* Get spi slave on CS0 */
ut_assertok(spi_get_bus_and_cs(busnum, cs_a, 1000000, mode, NULL, 0,
&bus, &slave_a));
/* Get spi slave on CS1 */
ut_assertok(spi_get_bus_and_cs(busnum, cs_b, 1000000, mode, NULL, 0,
&bus, &slave_b));
/* Different max_hz, different mode. */
ut_assert(slave_a->max_hz != slave_b->max_hz);
ut_assert(slave_a->mode != slave_b->mode);
dm_test_spi_switch_slaves(uts, slave_a, slave_b);
/* Different max_hz, same mode. */
slave_a->mode = slave_b->mode;
dm_test_spi_switch_slaves(uts, slave_a, slave_b);
/*
* Same max_hz, different mode.
* Restore original mode for slave_a, from platdata.
*/
slave_plat = dev_get_parent_plat(slave_a->dev);
slave_a->mode = slave_plat->mode;
slave_a->max_hz = slave_b->max_hz;
dm_test_spi_switch_slaves(uts, slave_a, slave_b);
return 0;
}
DM_TEST(dm_test_spi_claim_bus, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/* Test that sandbox SPI works correctly */
static int dm_test_spi_xfer(struct unit_test_state *uts)
{