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test: dm: add a test for MDIO MUX DM uclass

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Adds a test using a makeshift MDIO MUX.  The test is based on the existing
MDIO test.  It uses the last emulated PHY register to verify MUX selection.

Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Alex Marginean 2019-07-12 10:13:53 +03:00 • committed by Joe Hershberger
parent b47edf8069
commit c3d9f3f899
7 changed files with 212 additions and 1 deletions
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1
test/dm/Makefile
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@ -63,4 +63,5 @@ obj-$(CONFIG_TEE) += tee.o
obj-$(CONFIG_VIRTIO_SANDBOX) += virtio.o
obj-$(CONFIG_DMA) += dma.o
obj-$(CONFIG_DM_MDIO) += mdio.o
obj-$(CONFIG_DM_MDIO_MUX) += mdio_mux.o
endif

80
test/dm/mdio_mux.c Normal file
View file

@ -0,0 +1,80 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2019
* Alex Marginean, NXP
*/
#include <common.h>
#include <dm.h>
#include <dm/test.h>
#include <misc.h>
#include <test/ut.h>
#include <miiphy.h>
/* macros copied over from mdio_sandbox.c */
#define SANDBOX_PHY_ADDR 5
#define SANDBOX_PHY_REG_CNT 2
#define TEST_REG_VALUE 0xabcd
static int dm_test_mdio_mux(struct unit_test_state *uts)
{
struct uclass *uc;
struct udevice *mux;
struct udevice *mdio_ch0, *mdio_ch1, *mdio;
struct mdio_ops *ops, *ops_parent;
struct mdio_mux_ops *mmops;
u16 reg;
ut_assertok(uclass_get(UCLASS_MDIO_MUX, &uc));
ut_assertok(uclass_get_device_by_name(UCLASS_MDIO_MUX, "mdio-mux-test",
&mux));
ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-ch-test@0",
&mdio_ch0));
ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-ch-test@1",
&mdio_ch1));
ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &mdio));
ops = mdio_get_ops(mdio_ch0);
ut_assertnonnull(ops);
ut_assertnonnull(ops->read);
ut_assertnonnull(ops->write);
mmops = mdio_mux_get_ops(mux);
ut_assertnonnull(mmops);
ut_assertnonnull(mmops->select);
ops_parent = mdio_get_ops(mdio);
ut_assertnonnull(ops);
ut_assertnonnull(ops->read);
/*
* mux driver sets last register on the emulated PHY whenever a group
* is selected to the selection #. Just reading that register from
* either of the child buses should return the id of the child bus
*/
reg = ops->read(mdio_ch0, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
SANDBOX_PHY_REG_CNT - 1);
ut_asserteq(reg, 0);
reg = ops->read(mdio_ch1, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
SANDBOX_PHY_REG_CNT - 1);
ut_asserteq(reg, 1);
mmops->select(mux, MDIO_MUX_SELECT_NONE, 5);
reg = ops_parent->read(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
SANDBOX_PHY_REG_CNT - 1);
ut_asserteq(reg, 5);
mmops->deselect(mux, 5);
reg = ops_parent->read(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
SANDBOX_PHY_REG_CNT - 1);
ut_asserteq(reg, (u16)MDIO_MUX_SELECT_NONE);
return 0;
}
DM_TEST(dm_test_mdio_mux, DM_TESTF_SCAN_FDT);