Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: wacom - pass touch resolution to clients through input_absinfo
  Input: wacom - add 2 Bamboo Pen and touch models
  Input: sysrq - ensure sysrq_enabled and __sysrq_enabled are consistent
  Input: sparse-keymap - fix KEY_VSW handling in sparse_keymap_setup
  Input: tegra-kbc - add tegra keyboard driver
  Input: gpio_keys - switch to using request_any_context_irq
  Input: serio - allow registered drivers to get status flag
  Input: ct82710c - return proper error code for ct82c710_open
  Input: bu21013_ts - added regulator support
  Input: bu21013_ts - remove duplicate resolution parameters
  Input: tnetv107x-ts - don't treat NULL clk as an error
  Input: tnetv107x-keypad - don't treat NULL clk as an error

Fix up trivial conflicts in drivers/input/keyboard/Makefile due to
additions of tc3589x/Tegra drivers

16 files changed, 901 insertions, 25 deletions

diff --git a/arch/arm/mach-tegra/include/mach/kbc.h b/arch/arm/mach-tegra/include/mach/kbc.h
new file mode 100644
index 000000000000..66ad2760c621
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/kbc.h
@@ -0,0 +1,61 @@
+/*
+ * Platform definitions for tegra-kbc keyboard input driver
+ *
+ * Copyright (c) 2010-2011, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef ASMARM_ARCH_TEGRA_KBC_H
+#define ASMARM_ARCH_TEGRA_KBC_H
+
+#include <linux/types.h>
+#include <linux/input/matrix_keypad.h>
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+#define KBC_MAX_GPIO    24
+#define KBC_MAX_KPENT   8
+#else
+#define KBC_MAX_GPIO    20
+#define KBC_MAX_KPENT   7
+#endif
+
+#define KBC_MAX_ROW     16
+#define KBC_MAX_COL     8
+#define KBC_MAX_KEY     (KBC_MAX_ROW * KBC_MAX_COL)
+
+struct tegra_kbc_pin_cfg {
+        bool is_row;
+        unsigned char num;
+};
+
+struct tegra_kbc_wake_key {
+        u8 row:4;
+        u8 col:4;
+};
+
+struct tegra_kbc_platform_data {
+        unsigned int debounce_cnt;
+        unsigned int repeat_cnt;
+
+        unsigned int wake_cnt; /* 0:wake on any key >1:wake on wake_cfg */
+        const struct tegra_kbc_wake_key *wake_cfg;
+
+        struct tegra_kbc_pin_cfg pin_cfg[KBC_MAX_GPIO];
+        const struct matrix_keymap_data *keymap_data;
+
+        bool wakeup;
+};
+#endif
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 417507348bab..c7a92028f450 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -343,6 +343,16 @@ config KEYBOARD_NOMADIK
           To compile this driver as a module, choose M here: the
           module will be called nmk-ske-keypad.
 
+config KEYBOARD_TEGRA
+        tristate "NVIDIA Tegra internal matrix keyboard controller support"
+        depends on ARCH_TEGRA
+        help
+          Say Y here if you want to use a matrix keyboard connected directly
+          to the internal keyboard controller on Tegra SoCs.
+
+          To compile this driver as a module, choose M here: the
+          module will be called tegra-kbc.
+
 config KEYBOARD_OPENCORES
         tristate "OpenCores Keyboard Controller"
         help
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 4e5571b72cda..468c627a2844 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_KEYBOARD_STMPE)		+= stmpe-keypad.o
 obj-$(CONFIG_KEYBOARD_STOWAWAY)         += stowaway.o
 obj-$(CONFIG_KEYBOARD_SUNKBD)           += sunkbd.o
 obj-$(CONFIG_KEYBOARD_TC3589X)          += tc3589x-keypad.o
+obj-$(CONFIG_KEYBOARD_TEGRA)            += tegra-kbc.o
 obj-$(CONFIG_KEYBOARD_TNETV107X)        += tnetv107x-keypad.o
 obj-$(CONFIG_KEYBOARD_TWL4030)          += twl4030_keypad.o
 obj-$(CONFIG_KEYBOARD_XTKBD)            += xtkbd.o
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 6069abe31e42..eb3006361ee4 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -322,7 +322,7 @@ static void gpio_keys_report_event(struct gpio_button_data *bdata)
         struct gpio_keys_button *button = bdata->button;
         struct input_dev *input = bdata->input;
         unsigned int type = button->type ?: EV_KEY;
-        int state = (gpio_get_value(button->gpio) ? 1 : 0) ^ button->active_low;
+        int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low;
 
         input_event(input, type, button->code, !!state);
         input_sync(input);
@@ -410,8 +410,8 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
         if (!button->can_disable)
                 irqflags |= IRQF_SHARED;
 
-        error = request_irq(irq, gpio_keys_isr, irqflags, desc, bdata);
-        if (error) {
+        error = request_any_context_irq(irq, gpio_keys_isr, irqflags, desc, bdata);
+        if (error < 0) {
                 dev_err(dev, "Unable to claim irq %d; error %d\n",
                         irq, error);
                 goto fail3;
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
new file mode 100644
index 000000000000..939476659ad6
--- /dev/null
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -0,0 +1,727 @@
+/*
+ * Keyboard class input driver for the NVIDIA Tegra SoC internal matrix
+ * keyboard controller
+ *
+ * Copyright (c) 2009-2011, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <mach/clk.h>
+#include <mach/kbc.h>
+
+#define KBC_MAX_DEBOUNCE_CNT    0x3ffu
+
+/* KBC row scan time and delay for beginning the row scan. */
+#define KBC_ROW_SCAN_TIME       16
+#define KBC_ROW_SCAN_DLY        5
+
+/* KBC uses a 32KHz clock so a cycle = 1/32Khz */
+#define KBC_CYCLE_USEC  32
+
+/* KBC Registers */
+
+/* KBC Control Register */
+#define KBC_CONTROL_0   0x0
+#define KBC_FIFO_TH_CNT_SHIFT(cnt)      (cnt << 14)
+#define KBC_DEBOUNCE_CNT_SHIFT(cnt)     (cnt << 4)
+#define KBC_CONTROL_FIFO_CNT_INT_EN     (1 << 3)
+#define KBC_CONTROL_KBC_EN              (1 << 0)
+
+/* KBC Interrupt Register */
+#define KBC_INT_0       0x4
+#define KBC_INT_FIFO_CNT_INT_STATUS     (1 << 2)
+
+#define KBC_ROW_CFG0_0  0x8
+#define KBC_COL_CFG0_0  0x18
+#define KBC_INIT_DLY_0  0x28
+#define KBC_RPT_DLY_0   0x2c
+#define KBC_KP_ENT0_0   0x30
+#define KBC_KP_ENT1_0   0x34
+#define KBC_ROW0_MASK_0 0x38
+
+#define KBC_ROW_SHIFT   3
+
+struct tegra_kbc {
+        void __iomem *mmio;
+        struct input_dev *idev;
+        unsigned int irq;
+        unsigned int wake_enable_rows;
+        unsigned int wake_enable_cols;
+        spinlock_t lock;
+        unsigned int repoll_dly;
+        unsigned long cp_dly_jiffies;
+        const struct tegra_kbc_platform_data *pdata;
+        unsigned short keycode[KBC_MAX_KEY];
+        unsigned short current_keys[KBC_MAX_KPENT];
+        unsigned int num_pressed_keys;
+        struct timer_list timer;
+        struct clk *clk;
+};
+
+static const u32 tegra_kbc_default_keymap[] = {
+        KEY(0, 2, KEY_W),
+        KEY(0, 3, KEY_S),
+        KEY(0, 4, KEY_A),
+        KEY(0, 5, KEY_Z),
+        KEY(0, 7, KEY_FN),
+
+        KEY(1, 7, KEY_MENU),
+
+        KEY(2, 6, KEY_RIGHTALT),
+        KEY(2, 7, KEY_LEFTALT),
+
+        KEY(3, 0, KEY_5),
+        KEY(3, 1, KEY_4),
+        KEY(3, 2, KEY_R),
+        KEY(3, 3, KEY_E),
+        KEY(3, 4, KEY_F),
+        KEY(3, 5, KEY_D),
+        KEY(3, 6, KEY_X),
+
+        KEY(4, 0, KEY_7),
+        KEY(4, 1, KEY_6),
+        KEY(4, 2, KEY_T),
+        KEY(4, 3, KEY_H),
+        KEY(4, 4, KEY_G),
+        KEY(4, 5, KEY_V),
+        KEY(4, 6, KEY_C),
+        KEY(4, 7, KEY_SPACE),
+
+        KEY(5, 0, KEY_9),
+        KEY(5, 1, KEY_8),
+        KEY(5, 2, KEY_U),
+        KEY(5, 3, KEY_Y),
+        KEY(5, 4, KEY_J),
+        KEY(5, 5, KEY_N),
+        KEY(5, 6, KEY_B),
+        KEY(5, 7, KEY_BACKSLASH),
+
+        KEY(6, 0, KEY_MINUS),
+        KEY(6, 1, KEY_0),
+        KEY(6, 2, KEY_O),
+        KEY(6, 3, KEY_I),
+        KEY(6, 4, KEY_L),
+        KEY(6, 5, KEY_K),
+        KEY(6, 6, KEY_COMMA),
+        KEY(6, 7, KEY_M),
+
+        KEY(7, 1, KEY_EQUAL),
+        KEY(7, 2, KEY_RIGHTBRACE),
+        KEY(7, 3, KEY_ENTER),
+        KEY(7, 7, KEY_MENU),
+
+        KEY(8, 4, KEY_RIGHTSHIFT),
+        KEY(8, 5, KEY_LEFTSHIFT),
+
+        KEY(9, 5, KEY_RIGHTCTRL),
+        KEY(9, 7, KEY_LEFTCTRL),
+
+        KEY(11, 0, KEY_LEFTBRACE),
+        KEY(11, 1, KEY_P),
+        KEY(11, 2, KEY_APOSTROPHE),
+        KEY(11, 3, KEY_SEMICOLON),
+        KEY(11, 4, KEY_SLASH),
+        KEY(11, 5, KEY_DOT),
+
+        KEY(12, 0, KEY_F10),
+        KEY(12, 1, KEY_F9),
+        KEY(12, 2, KEY_BACKSPACE),
+        KEY(12, 3, KEY_3),
+        KEY(12, 4, KEY_2),
+        KEY(12, 5, KEY_UP),
+        KEY(12, 6, KEY_PRINT),
+        KEY(12, 7, KEY_PAUSE),
+
+        KEY(13, 0, KEY_INSERT),
+        KEY(13, 1, KEY_DELETE),
+        KEY(13, 3, KEY_PAGEUP),
+        KEY(13, 4, KEY_PAGEDOWN),
+        KEY(13, 5, KEY_RIGHT),
+        KEY(13, 6, KEY_DOWN),
+        KEY(13, 7, KEY_LEFT),
+
+        KEY(14, 0, KEY_F11),
+        KEY(14, 1, KEY_F12),
+        KEY(14, 2, KEY_F8),
+        KEY(14, 3, KEY_Q),
+        KEY(14, 4, KEY_F4),
+        KEY(14, 5, KEY_F3),
+        KEY(14, 6, KEY_1),
+        KEY(14, 7, KEY_F7),
+
+        KEY(15, 0, KEY_ESC),
+        KEY(15, 1, KEY_GRAVE),
+        KEY(15, 2, KEY_F5),
+        KEY(15, 3, KEY_TAB),
+        KEY(15, 4, KEY_F1),
+        KEY(15, 5, KEY_F2),
+        KEY(15, 6, KEY_CAPSLOCK),
+        KEY(15, 7, KEY_F6),
+};
+
+static const struct matrix_keymap_data tegra_kbc_default_keymap_data = {
+        .keymap         = tegra_kbc_default_keymap,
+        .keymap_size    = ARRAY_SIZE(tegra_kbc_default_keymap),
+};
+
+static void tegra_kbc_report_released_keys(struct input_dev *input,
+                                           unsigned short old_keycodes[],
+                                           unsigned int old_num_keys,
+                                           unsigned short new_keycodes[],
+                                           unsigned int new_num_keys)
+{
+        unsigned int i, j;
+
+        for (i = 0; i < old_num_keys; i++) {
+                for (j = 0; j < new_num_keys; j++)
+                        if (old_keycodes[i] == new_keycodes[j])
+                                break;
+
+                if (j == new_num_keys)
+                        input_report_key(input, old_keycodes[i], 0);
+        }
+}
+
+static void tegra_kbc_report_pressed_keys(struct input_dev *input,
+                                          unsigned char scancodes[],
+                                          unsigned short keycodes[],
+                                          unsigned int num_pressed_keys)
+{
+        unsigned int i;
+
+        for (i = 0; i < num_pressed_keys; i++) {
+                input_event(input, EV_MSC, MSC_SCAN, scancodes[i]);
+                input_report_key(input, keycodes[i], 1);
+        }
+}
+
+static void tegra_kbc_report_keys(struct tegra_kbc *kbc)
+{
+        unsigned char scancodes[KBC_MAX_KPENT];
+        unsigned short keycodes[KBC_MAX_KPENT];
+        u32 val = 0;
+        unsigned int i;
+        unsigned int num_down = 0;
+        unsigned long flags;
+
+        spin_lock_irqsave(&kbc->lock, flags);
+        for (i = 0; i < KBC_MAX_KPENT; i++) {
+                if ((i % 4) == 0)
+                        val = readl(kbc->mmio + KBC_KP_ENT0_0 + i);
+
+                if (val & 0x80) {
+                        unsigned int col = val & 0x07;
+                        unsigned int row = (val >> 3) & 0x0f;
+                        unsigned char scancode =
+                                MATRIX_SCAN_CODE(row, col, KBC_ROW_SHIFT);
+
+                        scancodes[num_down] = scancode;
+                        keycodes[num_down++] = kbc->keycode[scancode];
+                }
+
+                val >>= 8;
+        }
+        spin_unlock_irqrestore(&kbc->lock, flags);
+
+        tegra_kbc_report_released_keys(kbc->idev,
+                                       kbc->current_keys, kbc->num_pressed_keys,
+                                       keycodes, num_down);
+        tegra_kbc_report_pressed_keys(kbc->idev, scancodes, keycodes, num_down);
+        input_sync(kbc->idev);
+
+        memcpy(kbc->current_keys, keycodes, sizeof(kbc->current_keys));
+        kbc->num_pressed_keys = num_down;
+}
+
+static void tegra_kbc_keypress_timer(unsigned long data)
+{
+        struct tegra_kbc *kbc = (struct tegra_kbc *)data;
+        unsigned long flags;
+        u32 val;
+        unsigned int i;
+
+        val = (readl(kbc->mmio + KBC_INT_0) >> 4) & 0xf;
+        if (val) {
+                unsigned long dly;
+
+                tegra_kbc_report_keys(kbc);
+
+                /*
+                 * If more than one keys are pressed we need not wait
+                 * for the repoll delay.
+                 */
+                dly = (val == 1) ? kbc->repoll_dly : 1;
+                mod_timer(&kbc->timer, jiffies + msecs_to_jiffies(dly));
+        } else {
+                /* Release any pressed keys and exit the polling loop */
+                for (i = 0; i < kbc->num_pressed_keys; i++)
+                        input_report_key(kbc->idev, kbc->current_keys[i], 0);
+                input_sync(kbc->idev);
+
+                kbc->num_pressed_keys = 0;
+
+                /* All keys are released so enable the keypress interrupt */
+                spin_lock_irqsave(&kbc->lock, flags);
+                val = readl(kbc->mmio + KBC_CONTROL_0);
+                val |= KBC_CONTROL_FIFO_CNT_INT_EN;
+                writel(val, kbc->mmio + KBC_CONTROL_0);
+                spin_unlock_irqrestore(&kbc->lock, flags);
+        }
+}
+
+static irqreturn_t tegra_kbc_isr(int irq, void *args)
+{
+        struct tegra_kbc *kbc = args;
+        u32 val, ctl;
+
+        /*
+         * Until all keys are released, defer further processing to
+         * the polling loop in tegra_kbc_keypress_timer
+         */
+        ctl = readl(kbc->mmio + KBC_CONTROL_0);
+        ctl &= ~KBC_CONTROL_FIFO_CNT_INT_EN;
+        writel(ctl, kbc->mmio + KBC_CONTROL_0);
+
+        /*
+         * Quickly bail out & reenable interrupts if the fifo threshold
+         * count interrupt wasn't the interrupt source
+         */
+        val = readl(kbc->mmio + KBC_INT_0);
+        writel(val, kbc->mmio + KBC_INT_0);
+
+        if (val & KBC_INT_FIFO_CNT_INT_STATUS) {
+                /*
+                 * Schedule timer to run when hardware is in continuous
+                 * polling mode.
+                 */
+                mod_timer(&kbc->timer, jiffies + kbc->cp_dly_jiffies);
+        } else {
+                ctl |= KBC_CONTROL_FIFO_CNT_INT_EN;
+                writel(ctl, kbc->mmio + KBC_CONTROL_0);
+        }
+
+        return IRQ_HANDLED;
+}
+
+static void tegra_kbc_setup_wakekeys(struct tegra_kbc *kbc, bool filter)
+{
+        const struct tegra_kbc_platform_data *pdata = kbc->pdata;
+        int i;
+        unsigned int rst_val;
+
+        BUG_ON(pdata->wake_cnt > KBC_MAX_KEY);
+        rst_val = (filter && pdata->wake_cnt) ? ~0 : 0;
+
+        for (i = 0; i < KBC_MAX_ROW; i++)
+                writel(rst_val, kbc->mmio + KBC_ROW0_MASK_0 + i * 4);
+
+        if (filter) {
+                for (i = 0; i < pdata->wake_cnt; i++) {
+                        u32 val, addr;
+                        addr = pdata->wake_cfg[i].row * 4 + KBC_ROW0_MASK_0;
+                        val = readl(kbc->mmio + addr);
+                        val &= ~(1 << pdata->wake_cfg[i].col);
+                        writel(val, kbc->mmio + addr);
+                }
+        }
+}
+
+static void tegra_kbc_config_pins(struct tegra_kbc *kbc)
+{
+        const struct tegra_kbc_platform_data *pdata = kbc->pdata;
+        int i;
+
+        for (i = 0; i < KBC_MAX_GPIO; i++) {
+                u32 r_shft = 5 * (i % 6);
+                u32 c_shft = 4 * (i % 8);
+                u32 r_mask = 0x1f << r_shift;
+                u32 c_mask = 0x0f << c_shift;
+                u32 r_offs = (i / 6) * 4 + KBC_ROW_CFG0_0;
+                u32 c_offs = (i / 8) * 4 + KBC_COL_CFG0_0;
+                u32 row_cfg = readl(kbc->mmio + r_offs);
+                u32 col_cfg = readl(kbc->mmio + c_offs);
+
+                row_cfg &= ~r_mask;
+                col_cfg &= ~c_mask;
+
+                if (pdata->pin_cfg[i].is_row)
+                        row_cfg |= ((pdata->pin_cfg[i].num << 1) | 1) << r_shft;
+                else
+                        col_cfg |= ((pdata->pin_cfg[i].num << 1) | 1) << c_shft;
+
+                writel(row_cfg, kbc->mmio + r_offs);
+                writel(col_cfg, kbc->mmio + c_offs);
+        }
+}
+
+static int tegra_kbc_start(struct tegra_kbc *kbc)
+{
+        const struct tegra_kbc_platform_data *pdata = kbc->pdata;
+        unsigned long flags;
+        unsigned int debounce_cnt;
+        u32 val = 0;
+
+        clk_enable(kbc->clk);
+
+        /* Reset the KBC controller to clear all previous status.*/
+        tegra_periph_reset_assert(kbc->clk);
+        udelay(100);
+        tegra_periph_reset_deassert(kbc->clk);
+        udelay(100);
+
+        tegra_kbc_config_pins(kbc);
+        tegra_kbc_setup_wakekeys(kbc, false);
+
+        writel(pdata->repeat_cnt, kbc->mmio + KBC_RPT_DLY_0);
+
+        /* Keyboard debounce count is maximum of 12 bits. */
+        debounce_cnt = min(pdata->debounce_cnt, KBC_MAX_DEBOUNCE_CNT);
+        val = KBC_DEBOUNCE_CNT_SHIFT(debounce_cnt);
+        val |= KBC_FIFO_TH_CNT_SHIFT(1); /* set fifo interrupt threshold to 1 */
+        val |= KBC_CONTROL_FIFO_CNT_INT_EN;  /* interrupt on FIFO threshold */
+        val |= KBC_CONTROL_KBC_EN;     /* enable */
+        writel(val, kbc->mmio + KBC_CONTROL_0);
+
+        /*
+         * Compute the delay(ns) from interrupt mode to continuous polling
+         * mode so the timer routine is scheduled appropriately.
+         */
+        val = readl(kbc->mmio + KBC_INIT_DLY_0);
+        kbc->cp_dly_jiffies = usecs_to_jiffies((val & 0xfffff) * 32);
+
+        kbc->num_pressed_keys = 0;
+
+        /*
+         * Atomically clear out any remaining entries in the key FIFO
+         * and enable keyboard interrupts.
+         */
+        spin_lock_irqsave(&kbc->lock, flags);
+        while (1) {
+                val = readl(kbc->mmio + KBC_INT_0);
+                val >>= 4;
+                if (!val)
+                        break;
+
+                val = readl(kbc->mmio + KBC_KP_ENT0_0);
+                val = readl(kbc->mmio + KBC_KP_ENT1_0);
+        }
+        writel(0x7, kbc->mmio + KBC_INT_0);
+        spin_unlock_irqrestore(&kbc->lock, flags);
+
+        enable_irq(kbc->irq);
+
+        return 0;
+}
+
+static void tegra_kbc_stop(struct tegra_kbc *kbc)
+{
+        unsigned long flags;
+        u32 val;
+
+        spin_lock_irqsave(&kbc->lock, flags);
+        val = readl(kbc->mmio + KBC_CONTROL_0);
+        val &= ~1;
+        writel(val, kbc->mmio + KBC_CONTROL_0);
+        spin_unlock_irqrestore(&kbc->lock, flags);
+
+        disable_irq(kbc->irq);
+        del_timer_sync(&kbc->timer);
+
+        clk_disable(kbc->clk);
+}
+
+static int tegra_kbc_open(struct input_dev *dev)
+{
+        struct tegra_kbc *kbc = input_get_drvdata(dev);
+
+        return tegra_kbc_start(kbc);
+}
+
+static void tegra_kbc_close(struct input_dev *dev)
+{
+        struct tegra_kbc *kbc = input_get_drvdata(dev);
+
+        return tegra_kbc_stop(kbc);
+}
+
+static bool __devinit
+tegra_kbc_check_pin_cfg(const struct tegra_kbc_platform_data *pdata,
+                        struct device *dev, unsigned int *num_rows)
+{
+        int i;
+
+        *num_rows = 0;
+
+        for (i = 0; i < KBC_MAX_GPIO; i++) {
+                const struct tegra_kbc_pin_cfg *pin_cfg = &pdata->pin_cfg[i];
+
+                if (pin_cfg->is_row) {
+                        if (pin_cfg->num >= KBC_MAX_ROW) {
+                                dev_err(dev,
+                                        "pin_cfg[%d]: invalid row number %d\n",
+                                        i, pin_cfg->num);
+                                return false;
+                        }
+                        (*num_rows)++;
+                } else {
+                        if (pin_cfg->num >= KBC_MAX_COL) {
+                                dev_err(dev,
+                                        "pin_cfg[%d]: invalid column number %d\n",
+                                        i, pin_cfg->num);
+                                return false;
+                        }
+                }
+        }
+
+        return true;
+}
+
+static int __devinit tegra_kbc_probe(struct platform_device *pdev)
+{
+        const struct tegra_kbc_platform_data *pdata = pdev->dev.platform_data;
+        const struct matrix_keymap_data *keymap_data;
+        struct tegra_kbc *kbc;
+        struct input_dev *input_dev;
+        struct resource *res;
+        int irq;
+        int err;
+        int i;
+        int num_rows = 0;
+        unsigned int debounce_cnt;
+        unsigned int scan_time_rows;
+
+        if (!pdata)
+                return -EINVAL;
+
+        if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows))
+                return -EINVAL;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "failed to get I/O memory\n");
+                return -ENXIO;
+        }
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                dev_err(&pdev->dev, "failed to get keyboard IRQ\n");
+                return -ENXIO;
+        }
+
+        kbc = kzalloc(sizeof(*kbc), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!kbc || !input_dev) {
+                err = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        kbc->pdata = pdata;
+        kbc->idev = input_dev;
+        kbc->irq = irq;
+        spin_lock_init(&kbc->lock);
+        setup_timer(&kbc->timer, tegra_kbc_keypress_timer, (unsigned long)kbc);
+
+        res = request_mem_region(res->start, resource_size(res), pdev->name);
+        if (!res) {
+                dev_err(&pdev->dev, "failed to request I/O memory\n");
+                err = -EBUSY;
+                goto err_free_mem;
+        }
+
+        kbc->mmio = ioremap(res->start, resource_size(res));
+        if (!kbc->mmio) {
+                dev_err(&pdev->dev, "failed to remap I/O memory\n");
+                err = -ENXIO;
+                goto err_free_mem_region;
+        }
+
+        kbc->clk = clk_get(&pdev->dev, NULL);
+        if (IS_ERR(kbc->clk)) {
+                dev_err(&pdev->dev, "failed to get keyboard clock\n");
+                err = PTR_ERR(kbc->clk);
+                goto err_iounmap;
+        }
+
+        kbc->wake_enable_rows = 0;
+        kbc->wake_enable_cols = 0;
+        for (i = 0; i < pdata->wake_cnt; i++) {
+                kbc->wake_enable_rows |= (1 << pdata->wake_cfg[i].row);
+                kbc->wake_enable_cols |= (1 << pdata->wake_cfg[i].col);
+        }
+
+        /*
+         * The time delay between two consecutive reads of the FIFO is
+         * the sum of the repeat time and the time taken for scanning
+         * the rows. There is an additional delay before the row scanning
+         * starts. The repoll delay is computed in milliseconds.
+         */
+        debounce_cnt = min(pdata->debounce_cnt, KBC_MAX_DEBOUNCE_CNT);
+        scan_time_rows = (KBC_ROW_SCAN_TIME + debounce_cnt) * num_rows;
+        kbc->repoll_dly = KBC_ROW_SCAN_DLY + scan_time_rows + pdata->repeat_cnt;
+        kbc->repoll_dly = ((kbc->repoll_dly * KBC_CYCLE_USEC) + 999) / 1000;
+
+        input_dev->name = pdev->name;
+        input_dev->id.bustype = BUS_HOST;
+        input_dev->dev.parent = &pdev->dev;
+        input_dev->open = tegra_kbc_open;
+        input_dev->close = tegra_kbc_close;
+
+        input_set_drvdata(input_dev, kbc);
+
+        input_dev->evbit[0] = BIT_MASK(EV_KEY);
+        input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+
+        input_dev->keycode = kbc->keycode;
+        input_dev->keycodesize = sizeof(kbc->keycode[0]);
+        input_dev->keycodemax = ARRAY_SIZE(kbc->keycode);
+
+        keymap_data = pdata->keymap_data ?: &tegra_kbc_default_keymap_data;
+        matrix_keypad_build_keymap(keymap_data, KBC_ROW_SHIFT,
+                                   input_dev->keycode, input_dev->keybit);
+
+        err = request_irq(kbc->irq, tegra_kbc_isr, IRQF_TRIGGER_HIGH,
+                          pdev->name, kbc);
+        if (err) {
+                dev_err(&pdev->dev, "failed to request keyboard IRQ\n");
+                goto err_put_clk;
+        }
+
+        disable_irq(kbc->irq);
+
+        err = input_register_device(kbc->idev);
+        if (err) {
+                dev_err(&pdev->dev, "failed to register input device\n");
+                goto err_free_irq;
+        }
+
+        platform_set_drvdata(pdev, kbc);
+        device_init_wakeup(&pdev->dev, pdata->wakeup);
+
+        return 0;
+
+err_free_irq:
+        free_irq(kbc->irq, pdev);
+err_put_clk:
+        clk_put(kbc->clk);
+err_iounmap:
+        iounmap(kbc->mmio);
+err_free_mem_region:
+        release_mem_region(res->start, resource_size(res));
+err_free_mem:
+        input_free_device(kbc->idev);
+        kfree(kbc);
+
+        return err;
+}
+
+static int __devexit tegra_kbc_remove(struct platform_device *pdev)
+{
+        struct tegra_kbc *kbc = platform_get_drvdata(pdev);
+        struct resource *res;
+
+        free_irq(kbc->irq, pdev);
+        clk_put(kbc->clk);
+
+        input_unregister_device(kbc->idev);
+        iounmap(kbc->mmio);
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        release_mem_region(res->start, resource_size(res));
+
+        kfree(kbc);
+
+        platform_set_drvdata(pdev, NULL);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_kbc_suspend(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct tegra_kbc *kbc = platform_get_drvdata(pdev);
+
+        if (device_may_wakeup(&pdev->dev)) {
+                tegra_kbc_setup_wakekeys(kbc, true);
+                enable_irq_wake(kbc->irq);
+                /* Forcefully clear the interrupt status */
+                writel(0x7, kbc->mmio + KBC_INT_0);
+                msleep(30);
+        } else {
+                mutex_lock(&kbc->idev->mutex);
+                if (kbc->idev->users)
+                        tegra_kbc_stop(kbc);
+                mutex_unlock(&kbc->idev->mutex);
+        }
+
+        return 0;
+}
+
+static int tegra_kbc_resume(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct tegra_kbc *kbc = platform_get_drvdata(pdev);
+        int err = 0;
+
+        if (device_may_wakeup(&pdev->dev)) {
+                disable_irq_wake(kbc->irq);
+                tegra_kbc_setup_wakekeys(kbc, false);
+        } else {
+                mutex_lock(&kbc->idev->mutex);
+                if (kbc->idev->users)
+                        err = tegra_kbc_start(kbc);
+                mutex_unlock(&kbc->idev->mutex);
+        }
+
+        return err;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tegra_kbc_pm_ops, tegra_kbc_suspend, tegra_kbc_resume);
+
+static struct platform_driver tegra_kbc_driver = {
+        .probe          = tegra_kbc_probe,
+        .remove         = __devexit_p(tegra_kbc_remove),
+        .driver = {
+                .name   = "tegra-kbc",
+                .owner  = THIS_MODULE,
+                .pm     = &tegra_kbc_pm_ops,
+        },
+};
+
+static void __exit tegra_kbc_exit(void)
+{
+        platform_driver_unregister(&tegra_kbc_driver);
+}
+module_exit(tegra_kbc_exit);
+
+static int __init tegra_kbc_init(void)
+{
+        return platform_driver_register(&tegra_kbc_driver);
+}
+module_init(tegra_kbc_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Rakesh Iyer <riyer@nvidia.com>");
+MODULE_DESCRIPTION("Tegra matrix keyboard controller driver");
+MODULE_ALIAS("platform:tegra-kbc");
diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c
index b4a81ebfab92..c8f097a15d89 100644
--- a/drivers/input/keyboard/tnetv107x-keypad.c
+++ b/drivers/input/keyboard/tnetv107x-keypad.c
@@ -14,6 +14,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/input.h>
 #include <linux/platform_device.h>
@@ -219,9 +220,9 @@ static int __devinit keypad_probe(struct platform_device *pdev)
         }
 
         kp->clk = clk_get(dev, NULL);
-        if (!kp->clk) {
+        if (IS_ERR(kp->clk)) {
                 dev_err(dev, "cannot claim device clock\n");
-                error = -EINVAL;
+                error = PTR_ERR(kp->clk);
                 goto error_clk;
         }
 
diff --git a/drivers/input/serio/ct82c710.c b/drivers/input/serio/ct82c710.c
index 448c7724beb9..852816567241 100644
--- a/drivers/input/serio/ct82c710.c
+++ b/drivers/input/serio/ct82c710.c
@@ -111,9 +111,11 @@ static void ct82c710_close(struct serio *serio)
 static int ct82c710_open(struct serio *serio)
 {
         unsigned char status;
+        int err;
 
-        if (request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL))
-                return -1;
+        err = request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL);
+        if (err)
+                return err;
 
         status = inb_p(CT82C710_STATUS);
 
@@ -131,7 +133,7 @@ static int ct82c710_open(struct serio *serio)
                 status &= ~(CT82C710_ENABLE | CT82C710_INTS_ON);
                 outb_p(status, CT82C710_STATUS);
                 free_irq(CT82C710_IRQ, NULL);
-                return -1;
+                return -EBUSY;
         }
 
         return 0;
diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c
index 6e362de3f412..8755f5f3ad37 100644
--- a/drivers/input/serio/serport.c
+++ b/drivers/input/serio/serport.c
@@ -116,14 +116,15 @@ static void serport_ldisc_close(struct tty_struct *tty)
 
 /*
  * serport_ldisc_receive() is called by the low level tty driver when characters
- * are ready for us. We forward the characters, one by one to the 'interrupt'
- * routine.
+ * are ready for us. We forward the characters and flags, one by one to the
+ * 'interrupt' routine.
  */
 
 static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
 {
         struct serport *serport = (struct serport*) tty->disc_data;
         unsigned long flags;
+        unsigned int ch_flags;
         int i;
 
         spin_lock_irqsave(&serport->lock, flags);
@@ -131,8 +132,23 @@ static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *c
         if (!test_bit(SERPORT_ACTIVE, &serport->flags))
                 goto out;
 
-        for (i = 0; i < count; i++)
-                serio_interrupt(serport->serio, cp[i], 0);
+        for (i = 0; i < count; i++) {
+                switch (fp[i]) {
+                case TTY_FRAME:
+                        ch_flags = SERIO_FRAME;
+                        break;
+
+                case TTY_PARITY:
+                        ch_flags = SERIO_PARITY;
+                        break;
+
+                default:
+                        ch_flags = 0;
+                        break;
+                }
+
+                serio_interrupt(serport->serio, cp[i], ch_flags);
+        }
 
 out:
         spin_unlock_irqrestore(&serport->lock, flags);
diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c
index a29a7812bd46..7729e547ba65 100644
--- a/drivers/input/sparse-keymap.c
+++ b/drivers/input/sparse-keymap.c
@@ -201,6 +201,7 @@ int sparse_keymap_setup(struct input_dev *dev,
                         break;
 
                 case KE_SW:
+                case KE_VSW:
                         __set_bit(EV_SW, dev->evbit);
                         __set_bit(entry->sw.code, dev->swbit);
                         break;
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 518782999fea..367fa82a607e 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -1101,6 +1101,13 @@ void wacom_setup_device_quirks(struct wacom_features *features)
         }
 }
 
+static unsigned int wacom_calculate_touch_res(unsigned int logical_max,
+                                              unsigned int physical_max)
+{
+       /* Touch physical dimensions are in 100th of mm */
+       return (logical_max * 100) / physical_max;
+}
+
 void wacom_setup_input_capabilities(struct input_dev *input_dev,
                                     struct wacom_wac *wacom_wac)
 {
@@ -1228,8 +1235,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
         case TABLETPC:
                 if (features->device_type == BTN_TOOL_DOUBLETAP ||
                     features->device_type == BTN_TOOL_TRIPLETAP) {
-                        input_set_abs_params(input_dev, ABS_RX, 0, features->x_phy, 0, 0);
-                        input_set_abs_params(input_dev, ABS_RY, 0, features->y_phy, 0, 0);
+                        input_abs_set_res(input_dev, ABS_X,
+                                wacom_calculate_touch_res(features->x_max,
+                                                        features->x_phy));
+                        input_abs_set_res(input_dev, ABS_Y,
+                                wacom_calculate_touch_res(features->y_max,
+                                                        features->y_phy));
                         __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
                 }
 
@@ -1272,6 +1283,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
                         input_set_abs_params(input_dev, ABS_MT_PRESSURE,
                                              0, features->pressure_max,
                                              features->pressure_fuzz, 0);
+                        input_abs_set_res(input_dev, ABS_X,
+                                wacom_calculate_touch_res(features->x_max,
+                                                        features->x_phy));
+                        input_abs_set_res(input_dev, ABS_Y,
+                                wacom_calculate_touch_res(features->y_max,
+                                                        features->y_phy));
                 } else if (features->device_type == BTN_TOOL_PEN) {
                         __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
                         __set_bit(BTN_TOOL_PEN, input_dev->keybit);
@@ -1426,6 +1443,10 @@ static struct wacom_features wacom_features_0xD3 =
         { "Wacom Bamboo 2FG 6x8", WACOM_PKGLEN_BBFUN,     21648, 13530, 1023, 63, BAMBOO_PT };
 static const struct wacom_features wacom_features_0xD4 =
         { "Wacom Bamboo Pen",     WACOM_PKGLEN_BBFUN,     14720,  9200,  255, 63, BAMBOO_PT };
+static struct wacom_features wacom_features_0xD6 =
+        { "Wacom BambooPT 2FG 4x5", WACOM_PKGLEN_BBFUN,   14720,  9200, 1023, 63, BAMBOO_PT };
+static struct wacom_features wacom_features_0xD7 =
+        { "Wacom BambooPT 2FG Small", WACOM_PKGLEN_BBFUN, 14720,  9200, 1023, 63, BAMBOO_PT };
 static struct wacom_features wacom_features_0xD8 =
         { "Wacom Bamboo Comic 2FG", WACOM_PKGLEN_BBFUN,   21648, 13530, 1023, 63, BAMBOO_PT };
 static struct wacom_features wacom_features_0xDA =
@@ -1507,6 +1528,8 @@ const struct usb_device_id wacom_ids[] = {
         { USB_DEVICE_WACOM(0xD2) },
         { USB_DEVICE_WACOM(0xD3) },
         { USB_DEVICE_WACOM(0xD4) },
+        { USB_DEVICE_WACOM(0xD6) },
+        { USB_DEVICE_WACOM(0xD7) },
         { USB_DEVICE_WACOM(0xD8) },
         { USB_DEVICE_WACOM(0xDA) },
         { USB_DEVICE_WACOM(0xDB) },
diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c
index f7fa9ef4cd65..1507ce108d5b 100644
--- a/drivers/input/touchscreen/bu21013_ts.c
+++ b/drivers/input/touchscreen/bu21013_ts.c
@@ -12,6 +12,7 @@
 #include <linux/input.h>
 #include <linux/input/bu21013.h>
 #include <linux/slab.h>
+#include <linux/regulator/consumer.h>
 
 #define PEN_DOWN_INTR   0
 #define MAX_FINGERS     2
@@ -139,6 +140,7 @@
  * @chip: pointer to the touch panel controller
  * @in_dev: pointer to the input device structure
  * @intr_pin: interrupt pin value
+ * @regulator: pointer to the Regulator used for touch screen
  *
  * Touch panel device data structure
  */
@@ -149,6 +151,7 @@ struct bu21013_ts_data {
         const struct bu21013_platform_device *chip;
         struct input_dev *in_dev;
         unsigned int intr_pin;
+        struct regulator *regulator;
 };
 
 /**
@@ -456,6 +459,20 @@ static int __devinit bu21013_probe(struct i2c_client *client,
         bu21013_data->in_dev = in_dev;
         bu21013_data->chip = pdata;
         bu21013_data->client = client;
+
+        bu21013_data->regulator = regulator_get(&client->dev, "V-TOUCH");
+        if (IS_ERR(bu21013_data->regulator)) {
+                dev_err(&client->dev, "regulator_get failed\n");
+                error = PTR_ERR(bu21013_data->regulator);
+                goto err_free_mem;
+        }
+
+        error = regulator_enable(bu21013_data->regulator);
+        if (error < 0) {
+                dev_err(&client->dev, "regulator enable failed\n");
+                goto err_put_regulator;
+        }
+
         bu21013_data->touch_stopped = false;
         init_waitqueue_head(&bu21013_data->wait);
 
@@ -464,7 +481,7 @@ static int __devinit bu21013_probe(struct i2c_client *client,
                 error = pdata->cs_en(pdata->cs_pin);
                 if (error < 0) {
                         dev_err(&client->dev, "chip init failed\n");
-                        goto err_free_mem;
+                        goto err_disable_regulator;
                 }
         }
 
@@ -485,9 +502,9 @@ static int __devinit bu21013_probe(struct i2c_client *client,
         __set_bit(EV_ABS, in_dev->evbit);
 
         input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0,
-                                                pdata->x_max_res, 0, 0);
+                                                pdata->touch_x_max, 0, 0);
         input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0,
-                                                pdata->y_max_res, 0, 0);
+                                                pdata->touch_y_max, 0, 0);
         input_set_drvdata(in_dev, bu21013_data);
 
         error = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq,
@@ -513,6 +530,10 @@ err_free_irq:
         bu21013_free_irq(bu21013_data);
 err_cs_disable:
         pdata->cs_dis(pdata->cs_pin);
+err_disable_regulator:
+        regulator_disable(bu21013_data->regulator);
+err_put_regulator:
+        regulator_put(bu21013_data->regulator);
 err_free_mem:
         input_free_device(in_dev);
         kfree(bu21013_data);
@@ -535,6 +556,10 @@ static int __devexit bu21013_remove(struct i2c_client *client)
         bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin);
 
         input_unregister_device(bu21013_data->in_dev);
+
+        regulator_disable(bu21013_data->regulator);
+        regulator_put(bu21013_data->regulator);
+
         kfree(bu21013_data);
 
         device_init_wakeup(&client->dev, false);
@@ -561,6 +586,8 @@ static int bu21013_suspend(struct device *dev)
         else
                 disable_irq(bu21013_data->chip->irq);
 
+        regulator_disable(bu21013_data->regulator);
+
         return 0;
 }
 
@@ -577,6 +604,12 @@ static int bu21013_resume(struct device *dev)
         struct i2c_client *client = bu21013_data->client;
         int retval;
 
+        retval = regulator_enable(bu21013_data->regulator);
+        if (retval < 0) {
+                dev_err(&client->dev, "bu21013 regulator enable failed\n");
+                return retval;
+        }
+
         retval = bu21013_init_chip(bu21013_data);
         if (retval < 0) {
                 dev_err(&client->dev, "bu21013 controller config failed\n");
diff --git a/drivers/input/touchscreen/tnetv107x-ts.c b/drivers/input/touchscreen/tnetv107x-ts.c
index cf1dba2e267c..22a3411e93c5 100644
--- a/drivers/input/touchscreen/tnetv107x-ts.c
+++ b/drivers/input/touchscreen/tnetv107x-ts.c
@@ -14,6 +14,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/input.h>
 #include <linux/platform_device.h>
@@ -289,9 +290,9 @@ static int __devinit tsc_probe(struct platform_device *pdev)
         }
 
         ts->clk = clk_get(dev, NULL);
-        if (!ts->clk) {
+        if (IS_ERR(ts->clk)) {
                 dev_err(dev, "cannot claim device clock\n");
-                error = -EINVAL;
+                error = PTR_ERR(ts->clk);
                 goto error_clk;
         }
 
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index c556ed9db13d..8e0dd254eb11 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -46,7 +46,7 @@
 #include <asm/irq_regs.h>
 
 /* Whether we react on sysrq keys or just ignore them */
-static int __read_mostly sysrq_enabled = 1;
+static int __read_mostly sysrq_enabled = SYSRQ_DEFAULT_ENABLE;
 static bool __read_mostly sysrq_always_enabled;
 
 static bool sysrq_on(void)
diff --git a/include/linux/input/bu21013.h b/include/linux/input/bu21013.h
index e470d387dd49..05e03284b92a 100644
--- a/include/linux/input/bu21013.h
+++ b/include/linux/input/bu21013.h
@@ -12,8 +12,6 @@
  * @cs_en:      pointer to the cs enable function
  * @cs_dis:     pointer to the cs disable function
  * @irq_read_val:    pointer to read the pen irq value function
- * @x_max_res: xmax resolution
- * @y_max_res: ymax resolution
  * @touch_x_max: touch x max
  * @touch_y_max: touch y max
  * @cs_pin: chip select pin
@@ -29,8 +27,6 @@ struct bu21013_platform_device {
         int (*cs_en)(int reset_pin);
         int (*cs_dis)(int reset_pin);
         int (*irq_read_val)(void);
-        int x_max_res;
-        int y_max_res;
         int touch_x_max;
         int touch_y_max;
         unsigned int cs_pin;
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
index 387fa7d05c98..7faf933cced7 100644
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -17,6 +17,9 @@
 #include <linux/errno.h>
 #include <linux/types.h>
 
+/* Enable/disable SYSRQ support by default (0==no, 1==yes). */
+#define SYSRQ_DEFAULT_ENABLE    1
+
 /* Possible values of bitmask for enabling sysrq functions */
 /* 0x0001 is reserved for enable everything */
 #define SYSRQ_ENABLE_LOG        0x0002
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index bc86bb32e126..0f1bd83db985 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -170,7 +170,8 @@ static int proc_taint(struct ctl_table *table, int write,
 #endif
 
 #ifdef CONFIG_MAGIC_SYSRQ
-static int __sysrq_enabled; /* Note: sysrq code ises it's own private copy */
+/* Note: sysrq code uses it's own private copy */
+static int __sysrq_enabled = SYSRQ_DEFAULT_ENABLE;
 
 static int sysrq_sysctl_handler(ctl_table *table, int write,
                                 void __user *buffer, size_t *lenp,