Those tests check:
- the ability for a phy-user to get a phy device a reference in the
  device-tree
- the ability to perform operations on the phy (init,deinit,on,off)
- the behavior of the uclass when optional operations are not implemented

Signed-off-by: Jean-Jacques Hiblot <jjhib...@ti.com>
---
 arch/sandbox/dts/test.dts       |  9 +++++
 configs/sandbox_defconfig       |  2 +
 configs/sandbox_noblk_defconfig |  2 +
 configs/sandbox_spl_defconfig   |  3 ++
 drivers/phy/Kconfig             |  9 +++++
 drivers/phy/Makefile            |  1 +
 drivers/phy/sandbox-phy.c       | 78 ++++++++++++++++++++++++++++++++++++
 test/dm/Makefile                |  1 +
 test/dm/generic_phy.c           | 89 +++++++++++++++++++++++++++++++++++++++++
 9 files changed, 194 insertions(+)
 create mode 100644 drivers/phy/sandbox-phy.c
 create mode 100644 test/dm/generic_phy.c

diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index fff175d..918c899 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -59,6 +59,15 @@
                ping-add = <3>;
        };
 
+       gen_phy: gen_phy {
+               compatible = "sandbox,phy";
+       };
+
+       gen_phy_user: gen_phy_user {
+               compatible = "simple-bus";
+               phy = <&gen_phy>;
+       };
+
        some-bus {
                #address-cells = <1>;
                #size-cells = <0>;
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 7f3f5ac..42116cf 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -164,6 +164,8 @@ CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
 CONFIG_CONSOLE_TRUETYPE_CANTORAONE=y
 CONFIG_VIDEO_SANDBOX_SDL=y
+CONFIG_GENERIC_PHY=y
+CONFIG_PHY_SANDBOX=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
diff --git a/configs/sandbox_noblk_defconfig b/configs/sandbox_noblk_defconfig
index 3f8e70d..7a5cd4b 100644
--- a/configs/sandbox_noblk_defconfig
+++ b/configs/sandbox_noblk_defconfig
@@ -166,6 +166,8 @@ CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
 CONFIG_CONSOLE_TRUETYPE_CANTORAONE=y
 CONFIG_VIDEO_SANDBOX_SDL=y
+CONFIG_GENERIC_PHY=y
+CONFIG_PHY_SANDBOX=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index ade6714..9b4cf39 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -170,6 +170,9 @@ CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
 CONFIG_CONSOLE_TRUETYPE_CANTORAONE=y
 CONFIG_VIDEO_SANDBOX_SDL=y
+CONFIG_GENERIC_PHY=y
+CONFIG_SPL_GENERIC_PHY=y
+CONFIG_PHY_SANDBOX=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index d66c9e3..032b932 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -29,4 +29,13 @@ config SPL_GENERIC_PHY
          compatible as possible with the equivalent framework found in the
          linux kernel.
 
+config PHY_SANDBOX
+       bool "Sandbox PHY support"
+       depends on SANDBOX
+       depends on GENERIC_PHY
+       help
+         This select a dummy sandbox PHY driver. It used only to implement
+         unit tests for the generic phy framework
+
+
 endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index b29a8b9..0125844 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_$(SPL_)GENERIC_PHY) += phy-uclass.o
+obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o
 
diff --git a/drivers/phy/sandbox-phy.c b/drivers/phy/sandbox-phy.c
new file mode 100644
index 0000000..1c60308
--- /dev/null
+++ b/drivers/phy/sandbox-phy.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ * Written by Jean-Jacques Hiblot  <jjhib...@ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <generic-phy.h>
+
+struct sandbox_phy_priv {
+       int initialized;
+       int on;
+};
+
+static int sandbox_phy_power_on(struct udevice *dev)
+{
+       struct sandbox_phy_priv *priv = dev_get_priv(dev);
+       if (!priv->initialized)
+               return -EIO;
+       priv->on = 1;
+       return 0;
+}
+
+static int sandbox_phy_power_off(struct udevice *dev)
+{
+       struct sandbox_phy_priv *priv = dev_get_priv(dev);
+       if (!priv->initialized)
+               return -EIO;
+       priv->on = 0;
+       return 0;
+}
+
+static int sandbox_phy_init(struct udevice *dev)
+{
+       struct sandbox_phy_priv *priv = dev_get_priv(dev);
+       priv->initialized = 1;
+       priv->on = 0;
+       return 0;
+}
+
+static int sandbox_phy_exit(struct udevice *dev)
+{
+       struct sandbox_phy_priv *priv = dev_get_priv(dev);
+       priv->initialized = 0;
+       priv->on = 0;
+       return 0;
+}
+
+static int sandbox_phy_probe(struct udevice *dev)
+{
+       struct sandbox_phy_priv *priv = dev_get_priv(dev);
+       priv->initialized = 0;
+       priv->on = 0;
+       return 0;
+}
+
+static struct generic_phy_ops sandbox_phy_ops = {
+       .power_on = sandbox_phy_power_on,
+       .power_off = sandbox_phy_power_off,
+       .init = sandbox_phy_init,
+       .exit = sandbox_phy_exit,
+};
+
+static const struct udevice_id sandbox_phy_ids[] = {
+       { .compatible = "sandbox,phy" },
+       { }
+};
+
+U_BOOT_DRIVER(phy_sandbox) = {
+       .name           = "phy_sandbox",
+       .id             = UCLASS_PHY,
+       .of_match       = sandbox_phy_ids,
+       .ops            = &sandbox_phy_ops,
+       .probe          = sandbox_phy_probe,
+       .priv_auto_alloc_size = sizeof(struct sandbox_phy_priv),
+};
diff --git a/test/dm/Makefile b/test/dm/Makefile
index 1885e17..e2b7d43 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -41,4 +41,5 @@ obj-$(CONFIG_TIMER) += timer.o
 obj-$(CONFIG_DM_VIDEO) += video.o
 obj-$(CONFIG_ADC) += adc.o
 obj-$(CONFIG_SPMI) += spmi.o
+obj-$(CONFIG_GENERIC_PHY) += generic_phy.o
 endif
diff --git a/test/dm/generic_phy.c b/test/dm/generic_phy.c
new file mode 100644
index 0000000..08b862a
--- /dev/null
+++ b/test/dm/generic_phy.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ * Written by Jean-Jacques Hiblot  <jjhib...@ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/test.h>
+#include <test/ut.h>
+#include <generic-phy.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Base test of the phy uclass */
+static int dm_test_phy_base(struct unit_test_state *uts)
+{
+       struct udevice *dev_method1;
+       struct udevice *dev_method2;
+       struct udevice *parent;
+
+
+       /* Get the device using the phy device*/
+       ut_assertok(uclass_get_device_by_name(UCLASS_SIMPLE_BUS,
+                                             "gen_phy_user", &parent));
+       /* Get the phy device with std uclass function */
+       ut_assertok(uclass_get_device_by_name(UCLASS_PHY, "gen_phy",
+                                             &dev_method1));
+
+       /*
+        * Get the phy device from user device and compare with the one
+        * obtained with the previous method.
+        */
+       dev_method2 = dm_generic_phy_get(parent, "phy");
+       ut_assertnonnull(dev_method2);
+       ut_assertok_ptr(dev_method2);
+       ut_asserteq_ptr(dev_method1, dev_method2);
+
+       /* Try to get a non-existing phy */
+       ut_asserteq(-ENODEV, uclass_get_device(UCLASS_PHY, 1, &dev_method2));
+       dev_method2 = dm_generic_phy_get(parent, "phy_not_existing");
+       ut_assert(IS_ERR_OR_NULL(dev_method2));
+
+       return 0;
+}
+DM_TEST(dm_test_phy_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test of the phy uclass using the sandbox phy driver operations */
+static int dm_test_phy_ops(struct unit_test_state *uts)
+{
+       struct udevice *dev;
+       struct udevice *parent;
+
+       ut_assertok(uclass_get_device_by_name(UCLASS_SIMPLE_BUS,
+                                             "gen_phy_user", &parent));
+       dev = dm_generic_phy_get(parent, "phy");
+       ut_assertnonnull(dev);
+       ut_assertok_ptr(dev);
+
+       /* test normal operations */
+       ut_assertok(generic_phy_init(dev));
+       ut_assertok(generic_phy_power_on(dev));
+       ut_assertok(generic_phy_power_off(dev));
+
+       /*
+        * test operations after exit().
+        * The sandbox phy driver does not allow it.
+        */
+       ut_assertok(generic_phy_exit(dev));
+       ut_assert(generic_phy_power_on(dev) != 0);
+       ut_assert(generic_phy_power_off(dev) != 0);
+
+       /*
+        * test normal operations again (after re-init)
+        */
+       ut_assertok(generic_phy_init(dev));
+       ut_assertok(generic_phy_power_on(dev));
+       ut_assertok(generic_phy_power_off(dev));
+
+       /*
+        * test calling unimplemented feature.
+        * The call is expected to succeed
+        */
+       ut_assertok(generic_phy_reset(dev));
+
+       return 0;
+}
+DM_TEST(dm_test_phy_ops, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
-- 
1.9.1

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