spmi: Add sandbox test driver

This patch adds emulated spmi bus controller with part of
pm8916 pmic on it to sandbox and tests validating SPMI uclass.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

2 files changed, 115 insertions, 0 deletions

diff --git a/test/dm/Makefile b/test/dm/Makefile
index df2d71f..9a11ae0 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -37,4 +37,5 @@ obj-$(CONFIG_DM_REGULATOR) += regulator.o
 obj-$(CONFIG_TIMER) += timer.o
 obj-$(CONFIG_DM_VIDEO) += video.o
 obj-$(CONFIG_ADC) += adc.o
+obj-$(CONFIG_SPMI) += spmi.o
 endif
diff --git a/test/dm/spmi.c b/test/dm/spmi.c
new file mode 100644
index 0000000..d519a90
--- /dev/null
+++ b/test/dm/spmi.c
@@ -0,0 +1,114 @@
+/*
+ * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <dm/root.h>
+#include <dm/test.h>
+#include <dm/util.h>
+#include <power/pmic.h>
+#include <spmi/spmi.h>
+#include <asm/gpio.h>
+#include <test/ut.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Test if bus childs got probed propperly*/
+static int dm_test_spmi_probe(struct unit_test_state *uts)
+{
+	const char *name = "spmi@0";
+	struct udevice *bus, *dev;
+
+	ut_assertok(uclass_get_device(UCLASS_SPMI, 0, &bus));
+
+	/* Check bus name */
+	ut_asserteq_str(name, bus->name);
+
+	/* Check that it has some devices */
+	ut_asserteq(device_has_children(bus), true);
+
+	ut_assertok(device_find_first_child(bus, &dev));
+
+	/* There should be at least one child */
+	ut_assertnonnull(dev);
+
+	/* Check that only PMICs are connected to the bus */
+	while (dev) {
+		ut_asserteq(device_get_uclass_id(dev), UCLASS_PMIC);
+		device_find_next_child(&dev);
+	}
+
+	return 0;
+}
+DM_TEST(dm_test_spmi_probe, DM_TESTF_SCAN_FDT);
+
+/* Test if it's possible to read bus directly and indirectly */
+static int dm_test_spmi_access(struct unit_test_state *uts)
+{
+	const char *pmic_name = "pm8916@0";
+	struct udevice *bus, *pmic;
+
+	ut_assertok(uclass_get_device(UCLASS_SPMI, 0, &bus));
+
+	ut_assertok(device_get_child(bus, 0, &pmic));
+
+	/* Sanity check if it's proper PMIC */
+	ut_asserteq_str(pmic_name, pmic->name);
+
+	/* Read PMIC ID reg using SPMI bus - it assumes it has slaveID == 0*/
+	ut_asserteq(spmi_reg_read(bus, 0, 0xC0, 0x4), 0x10);
+	ut_asserteq(spmi_reg_read(bus, 0, 0xC0, 0x5), 0x5);
+
+	/* Read ID reg via pmic interface */
+	ut_asserteq(pmic_reg_read(pmic, 0xC004), 0x10);
+	ut_asserteq(pmic_reg_read(pmic, 0xC005), 0x5);
+
+	return 0;
+}
+DM_TEST(dm_test_spmi_access, DM_TESTF_SCAN_FDT);
+
+
+/* Test if it's possible to access GPIO that should be in pmic */
+static int dm_test_spmi_access_peripheral(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	unsigned int offset, gpio;
+	const char *name;
+	int offset_count;
+
+	/* Get second pin of PMIC GPIO */
+	ut_assertok(gpio_lookup_name("spmi1", &dev, &offset, &gpio));
+
+	/* Check if PMIC is parent */
+	ut_asserteq(device_get_uclass_id(dev->parent), UCLASS_PMIC);
+
+	/* This should be second gpio */
+	ut_asserteq(1, offset);
+
+	name = gpio_get_bank_info(dev, &offset_count);
+
+	/* Check bank name */
+	ut_asserteq_str("spmi", name);
+	/* Check pin count */
+	ut_asserteq(4, offset_count);
+
+	ut_assertok(gpio_request(gpio, "testing"));
+
+	/* Try to set/clear gpio */
+	ut_assertok(gpio_direction_output(gpio, 0));
+	ut_asserteq(gpio_get_value(gpio), 0);
+	ut_assertok(gpio_direction_output(gpio, 1));
+	ut_asserteq(gpio_get_value(gpio), 1);
+	ut_assertok(gpio_direction_input(gpio));
+	ut_asserteq(gpio_get_value(gpio), 1);
+
+	ut_assertok(gpio_free(gpio));
+
+	return 0;
+}
+DM_TEST(dm_test_spmi_access_peripheral, DM_TESTF_SCAN_FDT);