u-boot/test/dm/pinmux.c
Sean Anderson 7f0f1806e3 test: pinmux: Add test for pin muxing
This extends the pinctrl-sandbox driver to support pin muxing, and adds a
test for that behaviour. The test is done in C and not python (like the
existing tests for the pinctrl uclass) because it needs to call
pinctrl_select_state.  Another option could be to add a command that
invokes pinctrl_select_state and then test everything in
test/py/tests/test_pinmux.py.

The pinctrl-sandbox driver now mimics the way that many pinmux devices
work.  There are two groups of pins which are muxed together, as well as
four pins which are muxed individually. I have tried to test all normal
paths. However, very few error cases are explicitly checked for.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-10-08 11:42:36 -04:00

57 lines
1.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <dm/pinctrl.h>
#include <dm/test.h>
#include <test/ut.h>
static int dm_test_pinmux(struct unit_test_state *uts)
{
char buf[64];
struct udevice *dev;
#define test_muxing(selector, expected) do { \
ut_assertok(pinctrl_get_pin_muxing(dev, selector, buf, sizeof(buf))); \
ut_asserteq_str(expected, (char *)&buf); \
} while (0)
ut_assertok(uclass_get_device_by_name(UCLASS_PINCTRL, "pinctrl", &dev));
test_muxing(0, "UART TX.");
test_muxing(1, "UART RX.");
test_muxing(2, "I2S SCK.");
test_muxing(3, "I2S SD.");
test_muxing(4, "I2S WS.");
test_muxing(5, "GPIO0 bias-pull-up input-disable.");
test_muxing(6, "GPIO1 drive-open-drain.");
test_muxing(7, "GPIO2 bias-pull-down input-enable.");
test_muxing(8, "GPIO3 bias-disable.");
ut_assertok(pinctrl_select_state(dev, "alternate"));
test_muxing(0, "I2C SCL drive-open-drain.");
test_muxing(1, "I2C SDA drive-open-drain.");
test_muxing(2, "SPI SCLK.");
test_muxing(3, "SPI MOSI.");
test_muxing(4, "SPI MISO.");
test_muxing(5, "SPI CS0.");
test_muxing(6, "SPI CS1.");
test_muxing(7, "GPIO2 bias-pull-down input-enable.");
test_muxing(8, "GPIO3 bias-disable.");
ut_assertok(pinctrl_select_state(dev, "0"));
test_muxing(0, "I2C SCL drive-open-drain.");
test_muxing(1, "I2C SDA drive-open-drain.");
test_muxing(2, "I2S SCK.");
test_muxing(3, "I2S SD.");
test_muxing(4, "I2S WS.");
test_muxing(5, "GPIO0 bias-pull-up input-disable.");
test_muxing(6, "GPIO1 drive-open-drain.");
test_muxing(7, "GPIO2 bias-pull-down input-enable.");
test_muxing(8, "GPIO3 bias-disable.");
return 0;
}
DM_TEST(dm_test_pinmux, UT_TESTF_SCAN_FDT);