brya: add skeletal board and baseboard build

this adds a minimal build for a new board called brya. brya will be
the basis for a family of boards, so this also introduces a new
baseboard called brya. the primary goal is to introduce a build target
to enable iterative development of this board.

BRANCH=none
BUG=b:173575131
TEST=make BOARD=brya, make buildall,
	verified ec.bin is generated

Change-Id: I27a64594b84c69ee43ee91227c47391a801dee44
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2546802
Reviewed-by: Keith Short <keithshort@chromium.org>

baseboard/brya/baseboard.h

@@ -0,0 +1,11 @@
+/* Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Brya baseboard configuration */
+
+#ifndef __CROS_EC_BASEBOARD_H
+#define __CROS_EC_BASEBOARD_H
+
+#endif /* __CROS_EC_BASEBOARD_H */

baseboard/brya/build.mk

@@ -0,0 +1,7 @@
+# -*- makefile -*-
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Brya baseboard specific files build
+#

board/brya/board.c

@@ -0,0 +1,12 @@
+/* Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "registers.h"
+
+static void fake_gpio_interrupt(enum gpio_signal signal)
+{
+}
+
+#include "gpio_list.h"

board/brya/board.h

@@ -0,0 +1,32 @@
+/* Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Brya board configuration */
+
+#ifndef __CROS_EC_BOARD_H
+#define __CROS_EC_BOARD_H
+
+/* Baseboard features */
+#include "baseboard.h"
+
+#ifndef __ASSEMBLER__
+
+#include "gpio_signal.h"	/* must precede gpio.h */
+
+#endif /* !__ASSEMBLER__ */
+
+/*
+ * Disable features enabled by default.
+ */
+#undef CONFIG_ADC
+#undef CONFIG_LID_SWITCH
+#undef CONFIG_HIBERNATE
+#undef CONFIG_SPI_FLASH
+#undef CONFIG_SWITCH
+
+#define GPIO_WP_L		GPIO_FAKE_IRQ_00
+#define GPIO_ENTERING_RW	GPIO_FAKE_OUT_01
+
+#endif /* __CROS_EC_BOARD_H */

board/brya/build.mk

@@ -0,0 +1,14 @@
+# -*- makefile -*-
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Brya board specific files build
+#
+
+CHIP:=npcx
+CHIP_FAMILY:=npcx9
+CHIP_VARIANT:=npcx9m3f
+BASEBOARD:=brya
+
+board-y=board.o

board/brya/ec.tasklist

@@ -0,0 +1,13 @@
+/* Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * See CONFIG_TASK_LIST in config.h for details.
+ */
+
+#define CONFIG_TASK_LIST \
+	TASK_ALWAYS(HOOKS, hook_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(CONSOLE, console_task, NULL, VENTI_TASK_STACK_SIZE)

board/brya/gpio.inc

@@ -0,0 +1,15 @@
+/* -*- mode:c -*-
+ *
+ * Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * we need at least one GPIO definition because much of the code does not
+ * handle the case of no GPIOs.
+ */
+
+GPIO_INT(FAKE_IRQ_00, PIN(3, 4), GPIO_INT_BOTH, fake_gpio_interrupt)
+
+GPIO(FAKE_OUT_01, PIN(5, 6), GPIO_OUTPUT)