spl: input: Allow input in SPL and TPL

In some cases it is necessary to read the keyboard in early phases of
U-Boot. Update the config to allow this.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/input/Kconfig

@@ -1,3 +1,16 @@
+config INPUT
+	bool "Enable input subsystem"
+	depends on DM
+	default y
+
+config SPL_INPUT
+	bool "Enable input subsystem for SPL"
+	depends on SPL_DM
+
+config TPL_INPUT
+	bool "Enable input subsystem for TPL"
+	depends on TPL_DM
+
 config DM_KEYBOARD
 	bool "Enable driver model keyboard support"
 	depends on DM
@@ -7,8 +20,43 @@ config DM_KEYBOARD
 	  includes methods to start/stop the device, check for available
 	  input and update LEDs if the keyboard has them.
 
+config SPL_DM_KEYBOARD
+	bool "Enable driver model keyboard support"
+	depends on SPL_DM
+	help
+	  This adds a uclass for keyboards and implements keyboard support
+	  using driver model. The API is implemented by keyboard.h and
+	  includes methods to start/stop the device, check for available
+	  input and update LEDs if the keyboard has them.
+
+config TPL_DM_KEYBOARD
+	bool "Enable driver model keyboard support"
+	depends on TPL_DM
+	help
+	  This adds a uclass for keyboards and implements keyboard support
+	  using driver model. The API is implemented by keyboard.h and
+	  includes methods to start/stop the device, check for available
+	  input and update LEDs if the keyboard has them.
+
 config CROS_EC_KEYB
 	bool "Enable Chrome OS EC keyboard support"
+	depends on INPUT
+	help
+	  Most ARM Chromebooks use an EC to provide access to the keyboard.
+	  Messages are used to request key scans from the EC and these are
+	  then decoded into keys by this driver.
+
+config SPL_CROS_EC_KEYB
+	bool "Enable Chrome OS EC keyboard support in SPL"
+	depends on SPL_INPUT
+	help
+	  Most ARM Chromebooks use an EC to provide access to the keyboard.
+	  Messages are used to request key scans from the EC and these are
+	  then decoded into keys by this driver.
+
+config TPL_CROS_EC_KEYB
+	bool "Enable Chrome OS EC keyboard support in TPL"
+	depends on TPL_INPUT
 	help
 	  Most ARM Chromebooks use an EC to provide access to the keyboard.
 	  Messages are used to request key scans from the EC and these are

drivers/input/Makefile

@@ -3,12 +3,15 @@
 # (C) Copyright 2000-2007
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-obj-$(CONFIG_DM_KEYBOARD) += keyboard-uclass.o
+obj-y += input.o
+obj-$(CONFIG_$(SPL_TPL_)CROS_EC_KEYB) += cros_ec_keyb.o
+obj-$(CONFIG_$(SPL_TPL_)OF_CONTROL) += key_matrix.o
+obj-$(CONFIG_$(SPL_TPL_)DM_KEYBOARD) += keyboard-uclass.o
+
+ifndef CONFIG_SPL_BUILD
 
 obj-$(CONFIG_I8042_KEYB) += i8042.o
 obj-$(CONFIG_TEGRA_KEYBOARD) += tegra-kbc.o
 obj-$(CONFIG_TWL4030_INPUT) += twl4030.o
 obj-$(CONFIG_TWL6030_INPUT) += twl6030.o
-obj-$(CONFIG_CROS_EC_KEYB) += cros_ec_keyb.o
+endif
-obj-y += input.o
-obj-$(CONFIG_$(SPL_)OF_CONTROL) += key_matrix.o

drivers/input/input.c

@@ -652,7 +652,7 @@ int input_stdio_register(struct stdio_dev *dev)
 	int error;
 
 	error = stdio_register(dev);
-
+#if !defined(CONFIG_SPL_BUILD) || CONFIG_IS_ENABLED(ENV_SUPPORT)
 	/* check if this is the standard input device */
 	if (!error && strcmp(env_get("stdin"), dev->name) == 0) {
 		/* reassign the console */
@@ -660,6 +660,9 @@ int input_stdio_register(struct stdio_dev *dev)
 				console_assign(stdin, dev->name))
 			return -1;
 	}
+#else
+	error = error;
+#endif
 
 	return 0;
 }