Commit 6642a681 authored by Rakesh Iyer's avatar Rakesh Iyer Committed by Albert ARIBAUD

tegra: Add tegra keyboard driver

Add support for internal matrix keyboard controller for Nvidia Tegra
platforms. This driver uses the fdt decode function to obtain its key

Support for the Ctrl modifier is provided. The left and right ctrl keys are
dealt with in the same way.

This uses the new keyboard input library (drivers/input/input.c) to decode
keys and handle most of the common input logic. The new key matrix library
is also used to decode (row, column) key positions into key codes.

The intent is to make this driver purely about dealing with the hardware.

Key detection before the driver is loaded is supported. This key will be
picked up when the keyboard driver is initialized.

Modified by Bernie Thompson <> and
Simon Glass <> for device tree, input layer, key matrix
and various other things.
Signed-off-by: default avatarSimon Glass <>
Signed-off-by: default avatarTom Warren <>
parent c3ab91f0
This diff is collapsed.
......@@ -62,6 +62,7 @@ enum fdt_compat_id {
COMPAT_NVIDIA_TEGRA20_DVC, /* Tegra2 dvc (really just i2c) */
COMPAT_NVIDIA_TEGRA20_EMC, /* Tegra2 memory controller */
COMPAT_NVIDIA_TEGRA20_EMC_TABLE, /* Tegra2 memory timing table */
COMPAT_NVIDIA_TEGRA20_KBC, /* Tegra2 Keyboard */
* Copyright (c) 2011 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.
#ifndef __include_tegra_kbc_h__
#define __include_tegra_kbc_h__
#include <common.h>
#define KEY_IS_MODIFIER(key) ((key) >= KEY_FIRST_MODIFIER)
struct kbc_tegra {
u32 control;
u32 interrupt;
u32 row_cfg[4];
u32 col_cfg[3];
u32 timeout_dly;
u32 init_dly;
u32 rpt_dly;
u32 kp_ent[2];
u32 row_mask[16];
extern int overwrite_console(void);
#define OVERWRITE_CONSOLE overwrite_console()
#endif /* __include_tegra_kbc_h__ */
......@@ -42,6 +42,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
const char *fdtdec_get_compatible(enum fdt_compat_id id)
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment