diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/Kconfig | 2 | ||||
-rw-r--r-- | drivers/Makefile | 1 | ||||
-rw-r--r-- | drivers/button/Kconfig | 12 | ||||
-rw-r--r-- | drivers/button/Makefile | 5 | ||||
-rw-r--r-- | drivers/button/button-uclass.c | 43 |
5 files changed, 63 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index 7a839fa1aa..119e412849 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -16,6 +16,8 @@ source "drivers/block/Kconfig" source "drivers/bootcount/Kconfig" +source "drivers/button/Kconfig" + source "drivers/cache/Kconfig" source "drivers/clk/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index afd159e903..2178871bfb 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0+ +obj-$(CONFIG_$(SPL_TPL_)BUTTON) += button/ obj-$(CONFIG_$(SPL_TPL_)CACHE) += cache/ obj-$(CONFIG_$(SPL_TPL_)CLK) += clk/ obj-$(CONFIG_$(SPL_TPL_)DM) += core/ diff --git a/drivers/button/Kconfig b/drivers/button/Kconfig new file mode 100644 index 0000000000..83018589e5 --- /dev/null +++ b/drivers/button/Kconfig @@ -0,0 +1,12 @@ +menu "Button Support" + +config BUTTON + bool "Enable button support" + depends on DM + help + Many boards have buttons which can be used to change behaviour (reset, ...). + U-Boot provides a uclass API to implement this feature. Button drivers + can provide access to board-specific buttons. Use of the device tree + for configuration is encouraged. + +endmenu diff --git a/drivers/button/Makefile b/drivers/button/Makefile new file mode 100644 index 0000000000..0b4c128cff --- /dev/null +++ b/drivers/button/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com> + +obj-$(CONFIG_BUTTON) += button-uclass.o diff --git a/drivers/button/button-uclass.c b/drivers/button/button-uclass.c new file mode 100644 index 0000000000..1c742c265c --- /dev/null +++ b/drivers/button/button-uclass.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com> + * + * Based on led-uclass.c + */ + +#include <common.h> +#include <button.h> +#include <dm.h> +#include <dm/uclass-internal.h> + +int button_get_by_label(const char *label, struct udevice **devp) +{ + struct udevice *dev; + struct uclass *uc; + + uclass_id_foreach_dev(UCLASS_BUTTON, dev, uc) { + struct button_uc_plat *uc_plat = dev_get_uclass_platdata(dev); + + /* Ignore the top-level button node */ + if (uc_plat->label && !strcmp(label, uc_plat->label)) + return uclass_get_device_tail(dev, 0, devp); + } + + return -ENODEV; +} + +enum button_state_t button_get_state(struct udevice *dev) +{ + struct button_ops *ops = button_get_ops(dev); + + if (!ops->get_state) + return -ENOSYS; + + return ops->get_state(dev); +} + +UCLASS_DRIVER(button) = { + .id = UCLASS_BUTTON, + .name = "button", + .per_device_platdata_auto_alloc_size = sizeof(struct button_uc_plat), +}; |