Add a test for the button_cmd feature. This validates that commands can be mapped to two buttons, that the correct command runs based on which button is pressed, that only 1 command is run, and that no command runs if button_cmd_0_name is wrong or unset.

Additionally, fix a potential uninitialised variable use caught by these tests, the btn variable in get_button_cmd() is assumed to be null if button_get_by_label() fails, but it's actually used uninitialised in that case.

CONFIG_BUTTON is now enabled automatically and was removed when running save_defconfig.

Fixes: e761035b6423 ("boot: add support for button commands") Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- Pipeline: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/pipelines/19995 Changes in v3: - Enable CONFIG_BUTTON_CMD for sandbox_flattree as well. - Link to v2: https://lore.kernel.org/u-boot/20240305145111.1391645-1-caleb.connolly@linar...

Changes in v2: - Explicitly assign btn as NULL in get_button_cmd(). This fixes a bug where if the undefined variable is non-zero the button_get_by_label() check would fail and result in invalid memory being accessed. - Enable CONFIG_BUTTON_CMD for sandbox64 as well as sandbox. - Link to v1: https://lore.kernel.org/u-boot/20240214170357.4091708-1-caleb.connolly@linar... --- common/button_cmd.c | 2 +- configs/sandbox64_defconfig | 1 + configs/sandbox_defconfig | 1 + configs/sandbox_flattree_defconfig | 1 + test/dm/button.c | 96 ++++++++++++++++++++++++++++++ 5 files changed, 100 insertions(+), 1 deletion(-)

diff --git a/common/button_cmd.c b/common/button_cmd.c index b6a8434d6f29..8642c26735cc 100644 --- a/common/button_cmd.c +++ b/common/button_cmd.c @@ -32,9 +32,9 @@ struct button_cmd { */ static int get_button_cmd(int n, struct button_cmd *cmd) { const char *cmd_str; - struct udevice *btn; + struct udevice *btn = NULL; char buf[24];

snprintf(buf, sizeof(buf), "button_cmd_%d_name", n); cmd->btn_name = env_get(buf); diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig index 3be9a00a8575..a62faf772482 100644 --- a/configs/sandbox64_defconfig +++ b/configs/sandbox64_defconfig @@ -10,8 +10,9 @@ CONFIG_PCI=y CONFIG_SANDBOX64=y CONFIG_DEBUG_UART=y CONFIG_SYS_MEMTEST_START=0x00100000 CONFIG_SYS_MEMTEST_END=0x00101000 +CONFIG_BUTTON_CMD=y CONFIG_FIT=y CONFIG_FIT_SIGNATURE=y CONFIG_FIT_VERBOSE=y CONFIG_LEGACY_IMAGE_FORMAT=y diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig index 4ad10363e91b..93b52f2de5cf 100644 --- a/configs/sandbox_defconfig +++ b/configs/sandbox_defconfig @@ -9,8 +9,9 @@ CONFIG_SYS_LOAD_ADDR=0x0 CONFIG_PCI=y CONFIG_DEBUG_UART=y CONFIG_SYS_MEMTEST_START=0x00100000 CONFIG_SYS_MEMTEST_END=0x00101000 +CONFIG_BUTTON_CMD=y CONFIG_FIT=y CONFIG_FIT_RSASSA_PSS=y CONFIG_FIT_CIPHER=y CONFIG_FIT_VERBOSE=y diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig index 039018627527..6bf8874e722e 100644 --- a/configs/sandbox_flattree_defconfig +++ b/configs/sandbox_flattree_defconfig @@ -7,8 +7,9 @@ CONFIG_SYS_LOAD_ADDR=0x0 CONFIG_PCI=y CONFIG_DEBUG_UART=y CONFIG_SYS_MEMTEST_START=0x00100000 CONFIG_SYS_MEMTEST_END=0x00101000 +CONFIG_BUTTON_CMD=y CONFIG_FIT=y CONFIG_FIT_SIGNATURE=y CONFIG_FIT_VERBOSE=y CONFIG_LEGACY_IMAGE_FORMAT=y diff --git a/test/dm/button.c b/test/dm/button.c index 3318668df25a..830d96fbef34 100644 --- a/test/dm/button.c +++ b/test/dm/button.c @@ -130,4 +130,100 @@ static int dm_test_button_keys_adc(struct unit_test_state *uts)

return 0; } DM_TEST(dm_test_button_keys_adc, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT); + +/* Test of the button uclass using the button_gpio driver */ +static int dm_test_button_cmd(struct unit_test_state *uts) +{ + struct udevice *btn1_dev, *btn2_dev, *gpio; + const char *envstr; + +#define BTN1_GPIO 3 +#define BTN2_GPIO 4 +#define BTN1_PASS_VAR "test_button_cmds_0" +#define BTN2_PASS_VAR "test_button_cmds_1" + + /* + * Buttons 1 and 2 are connected to gpio_a gpios 3 and 4 respectively. + * set the GPIOs to known values and then check that the appropriate + * commands are run when invoking process_button_cmds(). + */ + ut_assertok(uclass_get_device(UCLASS_BUTTON, 1, &btn1_dev)); + ut_assertok(uclass_get_device(UCLASS_BUTTON, 2, &btn2_dev)); + ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio)); + + /* + * Map a command to button 1 and check that it process_button_cmds() + * runs it if called with button 1 pressed. + */ + ut_assertok(env_set("button_cmd_0_name", "button1")); + ut_assertok(env_set("button_cmd_0", "env set " BTN1_PASS_VAR " PASS")); + ut_assertok(sandbox_gpio_set_value(gpio, BTN1_GPIO, 1)); + /* Sanity check that the button is actually pressed */ + ut_asserteq(BUTTON_ON, button_get_state(btn1_dev)); + process_button_cmds(); + ut_assertnonnull((envstr = env_get(BTN1_PASS_VAR))); + ut_asserteq_str(envstr, "PASS"); + + /* Clear result */ + ut_assertok(env_set(BTN1_PASS_VAR, NULL)); + + /* + * Map a command for button 2, press it, check that only the command + * for button 1 runs because it comes first and is also pressed. + */ + ut_assertok(env_set("button_cmd_1_name", "button2")); + ut_assertok(env_set("button_cmd_1", "env set " BTN2_PASS_VAR " PASS")); + ut_assertok(sandbox_gpio_set_value(gpio, BTN2_GPIO, 1)); + ut_asserteq(BUTTON_ON, button_get_state(btn2_dev)); + process_button_cmds(); + /* Check that button 1 triggered again */ + ut_assertnonnull((envstr = env_get(BTN1_PASS_VAR))); + ut_asserteq_str(envstr, "PASS"); + /* And button 2 didn't */ + ut_assertnull(env_get(BTN2_PASS_VAR)); + + /* Clear result */ + ut_assertok(env_set(BTN1_PASS_VAR, NULL)); + + /* + * Release button 1 and check that the command for button 2 is run + */ + ut_assertok(sandbox_gpio_set_value(gpio, BTN1_GPIO, 0)); + process_button_cmds(); + ut_assertnull(env_get(BTN1_PASS_VAR)); + /* Check that the command for button 2 ran */ + ut_assertnonnull((envstr = env_get(BTN2_PASS_VAR))); + ut_asserteq_str(envstr, "PASS"); + + /* Clear result */ + ut_assertok(env_set(BTN2_PASS_VAR, NULL)); + + /* + * Unset "button_cmd_0_name" and check that no commands run even + * with both buttons pressed. + */ + ut_assertok(env_set("button_cmd_0_name", NULL)); + /* Press button 1 (button 2 is already pressed )*/ + ut_assertok(sandbox_gpio_set_value(gpio, BTN1_GPIO, 1)); + ut_asserteq(BUTTON_ON, button_get_state(btn1_dev)); + process_button_cmds(); + ut_assertnull(env_get(BTN1_PASS_VAR)); + ut_assertnull(env_get(BTN2_PASS_VAR)); + + /* + * Check that no command is run if the button name is wrong. + */ + ut_assertok(env_set("button_cmd_0_name", "invalid_button")); + process_button_cmds(); + ut_assertnull(env_get(BTN1_PASS_VAR)); + ut_assertnull(env_get(BTN2_PASS_VAR)); + +#undef BTN1_PASS_VAR +#undef BTN2_PASS_VAR +#undef BTN1_GPIO +#undef BTN2_GPIO + + return 0; +} +DM_TEST(dm_test_button_cmd, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);