Merge branch 'next' into for-linus

Prepare second round of input updates for 4.8 merge window.

19 files changed, 1246 insertions, 70 deletions

diff --git a/Documentation/devicetree/bindings/input/rotary-encoder.txt b/Documentation/devicetree/bindings/input/rotary-encoder.txt
index 6c9f0c8a846c..e85ce3dea480 100644
--- a/Documentation/devicetree/bindings/input/rotary-encoder.txt
+++ b/Documentation/devicetree/bindings/input/rotary-encoder.txt
@@ -20,6 +20,8 @@ Optional properties:
   2: Half-period mode
   4: Quarter-period mode
 - wakeup-source: Boolean, rotary encoder can wake up the system.
+- rotary-encoder,encoding: String, the method used to encode steps.
+  Supported are "gray" (the default and more common) and "binary".
 
 Deprecated properties:
 - rotary-encoder,half-period: Makes the driver work on half-period mode.
@@ -34,6 +36,7 @@ Example:
                         compatible = "rotary-encoder";
                         gpios = <&gpio 19 1>, <&gpio 20 0>; /* GPIO19 is inverted */
                         linux,axis = <0>; /* REL_X */
+                        rotary-encoder,encoding = "gray";
                         rotary-encoder,relative-axis;
                 };
 
@@ -42,5 +45,6 @@ Example:
                         gpios = <&gpio 21 0>, <&gpio 22 0>;
                         linux,axis = <1>; /* ABS_Y */
                         rotary-encoder,steps = <24>;
+                        rotary-encoder,encoding = "binary";
                         rotary-encoder,rollover;
                 };
diff --git a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
new file mode 100644
index 000000000000..1112e0d794e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
@@ -0,0 +1,36 @@
+* GSL 1680 touchscreen controller
+
+Required properties:
+- compatible              : "silead,gsl1680"
+- reg                     : I2C slave address of the chip (0x40)
+- interrupt-parent        : a phandle pointing to the interrupt controller
+                            serving the interrupt for this chip
+- interrupts              : interrupt specification for the gsl1680 interrupt
+- power-gpios             : Specification for the pin connected to the gsl1680's
+                            shutdown input. This needs to be driven high to take the
+                            gsl1680 out of its low power state
+- touchscreen-size-x      : See touchscreen.txt
+- touchscreen-size-y      : See touchscreen.txt
+
+Optional properties:
+- touchscreen-inverted-x  : See touchscreen.txt
+- touchscreen-inverted-y  : See touchscreen.txt
+- touchscreen-swapped-x-y : See touchscreen.txt
+- silead,max-fingers      : maximum number of fingers the touchscreen can detect
+
+Example:
+
+i2c@00000000 {
+        gsl1680: touchscreen@40 {
+                compatible = "silead,gsl1680";
+                reg = <0x40>;
+                interrupt-parent = <&pio>;
+                interrupts = <6 11 IRQ_TYPE_EDGE_FALLING>;
+                power-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>;
+                touchscreen-size-x = <480>;
+                touchscreen-size-y = <800>;
+                touchscreen-inverted-x;
+                touchscreen-swapped-x-y;
+                silead,max-fingers = <5>;
+        };
+};
diff --git a/Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt b/Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt
new file mode 100644
index 000000000000..d87ad14f1efe
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/sis_i2c.txt
@@ -0,0 +1,33 @@
+* SiS I2C Multiple Touch Controller
+
+Required properties:
+- compatible: must be "sis,9200-ts"
+- reg: i2c slave address
+- interrupt-parent: the phandle for the interrupt controller
+  (see interrupt binding [0])
+- interrupts: touch controller interrupt (see interrupt
+  binding [0])
+
+Optional properties:
+- pinctrl-names: should be "default" (see pinctrl binding [1]).
+- pinctrl-0: a phandle pointing to the pin settings for the
+  device (see pinctrl binding [1]).
+- attn-gpios: the gpio pin used as attention line
+- reset-gpios: the gpio pin used to reset the controller
+- wakeup-source: touchscreen can be used as a wakeup source
+
+[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+
+Example:
+
+        sis9255@5c  {
+                compatible = "sis,9200-ts";
+                reg = <0x5c>;
+                pinctrl-names = "default";
+                pinctrl-0 = <&pinctrl_sis>;
+                interrupt-parent = <&gpio3>;
+                interrupts = <19 IRQ_TYPE_EDGE_FALLING>;
+                irq-gpios = <&gpio3 19 GPIO_ACTIVE_LOW>;
+                reset-gpios = <&gpio2 30 GPIO_ACTIVE_LOW>;
+        };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 80fdbe2ce088..99029cfed459 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -221,6 +221,7 @@ simtek
 sii     Seiko Instruments, Inc.
 silergy Silergy Corp.
 sirf    SiRF Technology, Inc.
+sis     Silicon Integrated Systems Corp.
 sitronix        Sitronix Technology Corporation
 skyworks        Skyworks Solutions, Inc.
 smsc    Standard Microsystems Corporation
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index a529a4535457..83af17ad0f1f 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -115,6 +115,10 @@ static bool sticks_to_null;
 module_param(sticks_to_null, bool, S_IRUGO);
 MODULE_PARM_DESC(sticks_to_null, "Do not map sticks at all for unknown pads");
 
+static bool auto_poweroff = true;
+module_param(auto_poweroff, bool, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(auto_poweroff, "Power off wireless controllers on suspend");
+
 static const struct xpad_device {
         u16 idVendor;
         u16 idProduct;
@@ -1248,6 +1252,36 @@ static void xpad_stop_input(struct usb_xpad *xpad)
         usb_kill_urb(xpad->irq_in);
 }
 
+static void xpad360w_poweroff_controller(struct usb_xpad *xpad)
+{
+        unsigned long flags;
+        struct xpad_output_packet *packet =
+                        &xpad->out_packets[XPAD_OUT_CMD_IDX];
+
+        spin_lock_irqsave(&xpad->odata_lock, flags);
+
+        packet->data[0] = 0x00;
+        packet->data[1] = 0x00;
+        packet->data[2] = 0x08;
+        packet->data[3] = 0xC0;
+        packet->data[4] = 0x00;
+        packet->data[5] = 0x00;
+        packet->data[6] = 0x00;
+        packet->data[7] = 0x00;
+        packet->data[8] = 0x00;
+        packet->data[9] = 0x00;
+        packet->data[10] = 0x00;
+        packet->data[11] = 0x00;
+        packet->len = 12;
+        packet->pending = true;
+
+        /* Reset the sequence so we send out poweroff now */
+        xpad->last_out_packet = -1;
+        xpad_try_sending_next_out_packet(xpad);
+
+        spin_unlock_irqrestore(&xpad->odata_lock, flags);
+}
+
 static int xpad360w_start_input(struct usb_xpad *xpad)
 {
         int error;
@@ -1590,6 +1624,15 @@ static int xpad_suspend(struct usb_interface *intf, pm_message_t message)
                  * or goes away.
                  */
                 xpad360w_stop_input(xpad);
+
+                /*
+                 * The wireless adapter is going off now, so the
+                 * gamepads are going to become disconnected.
+                 * Unless explicitly disabled, power them down
+                 * so they don't just sit there flashing.
+                 */
+                if (auto_poweroff && xpad->pad_present)
+                        xpad360w_poweroff_controller(xpad);
         } else {
                 mutex_lock(&input->mutex);
                 if (input->users)
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index b01966dc7eb3..4b0878f35471 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -186,7 +186,7 @@ static irqreturn_t cros_ec_keyb_irq(int irq, void *data)
         if (ret >= 0)
                 cros_ec_keyb_process(ckdev, kb_state, ret);
         else
-                dev_err(ec->dev, "failed to get keyboard state: %d\n", ret);
+                dev_err(ckdev->dev, "failed to get keyboard state: %d\n", ret);
 
         return IRQ_HANDLED;
 }
@@ -236,7 +236,7 @@ static void cros_ec_keyb_compute_valid_keys(struct cros_ec_keyb *ckdev)
 static int cros_ec_keyb_probe(struct platform_device *pdev)
 {
         struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
-        struct device *dev = ec->dev;
+        struct device *dev = &pdev->dev;
         struct cros_ec_keyb *ckdev;
         struct input_dev *idev;
         struct device_node *np;
@@ -246,23 +246,22 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
         if (!np)
                 return -ENODEV;
 
-        ckdev = devm_kzalloc(&pdev->dev, sizeof(*ckdev), GFP_KERNEL);
+        ckdev = devm_kzalloc(dev, sizeof(*ckdev), GFP_KERNEL);
         if (!ckdev)
                 return -ENOMEM;
-        err = matrix_keypad_parse_of_params(&pdev->dev, &ckdev->rows,
-                                            &ckdev->cols);
+        err = matrix_keypad_parse_of_params(dev, &ckdev->rows, &ckdev->cols);
         if (err)
                 return err;
 
-        ckdev->valid_keys = devm_kzalloc(&pdev->dev, ckdev->cols, GFP_KERNEL);
+        ckdev->valid_keys = devm_kzalloc(dev, ckdev->cols, GFP_KERNEL);
         if (!ckdev->valid_keys)
                 return -ENOMEM;
 
-        ckdev->old_kb_state = devm_kzalloc(&pdev->dev, ckdev->cols, GFP_KERNEL);
+        ckdev->old_kb_state = devm_kzalloc(dev, ckdev->cols, GFP_KERNEL);
         if (!ckdev->old_kb_state)
                 return -ENOMEM;
 
-        idev = devm_input_allocate_device(&pdev->dev);
+        idev = devm_input_allocate_device(dev);
         if (!idev)
                 return -ENOMEM;
 
@@ -273,7 +272,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
 
         ckdev->ec = ec;
         ckdev->dev = dev;
-        dev_set_drvdata(&pdev->dev, ckdev);
+        dev_set_drvdata(dev, ckdev);
 
         idev->name = CROS_EC_DEV_NAME;
         idev->phys = ec->phys_name;
@@ -282,7 +281,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
         idev->id.bustype = BUS_VIRTUAL;
         idev->id.version = 1;
         idev->id.product = 0;
-        idev->dev.parent = &pdev->dev;
+        idev->dev.parent = dev;
         idev->open = cros_ec_keyb_open;
         idev->close = cros_ec_keyb_close;
 
diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c
index c7fc8d4fb080..1588aecafff7 100644
--- a/drivers/input/misc/rotary_encoder.c
+++ b/drivers/input/misc/rotary_encoder.c
@@ -28,6 +28,11 @@
 
 #define DRV_NAME "rotary-encoder"
 
+enum rotary_encoder_encoding {
+        ROTENC_GRAY,
+        ROTENC_BINARY,
+};
+
 struct rotary_encoder {
         struct input_dev *input;
 
@@ -37,6 +42,7 @@ struct rotary_encoder {
         u32 axis;
         bool relative_axis;
         bool rollover;
+        enum rotary_encoder_encoding encoding;
 
         unsigned int pos;
 
@@ -57,8 +63,9 @@ static unsigned int rotary_encoder_get_state(struct rotary_encoder *encoder)
 
         for (i = 0; i < encoder->gpios->ndescs; ++i) {
                 int val = gpiod_get_value_cansleep(encoder->gpios->desc[i]);
+
                 /* convert from gray encoding to normal */
-                if (ret & 1)
+                if (encoder->encoding == ROTENC_GRAY && ret & 1)
                         val = !val;
 
                 ret = ret << 1 | val;
@@ -213,6 +220,20 @@ static int rotary_encoder_probe(struct platform_device *pdev)
         encoder->rollover =
                 device_property_read_bool(dev, "rotary-encoder,rollover");
 
+        if (!device_property_present(dev, "rotary-encoder,encoding") ||
+            !device_property_match_string(dev, "rotary-encoder,encoding",
+                                          "gray")) {
+                dev_info(dev, "gray");
+                encoder->encoding = ROTENC_GRAY;
+        } else if (!device_property_match_string(dev, "rotary-encoder,encoding",
+                                                 "binary")) {
+                dev_info(dev, "binary");
+                encoder->encoding = ROTENC_BINARY;
+        } else {
+                dev_err(dev, "unknown encoding setting\n");
+                return -EINVAL;
+        }
+
         device_property_read_u32(dev, "linux,axis", &encoder->axis);
         encoder->relative_axis =
                 device_property_read_bool(dev, "rotary-encoder,relative-axis");
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index 2f589857a039..d15b33813021 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -4,7 +4,8 @@
  * Copyright (c) 2013 ELAN Microelectronics Corp.
  *
  * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw>
- * Version: 1.6.0
+ * Author: KT Liao <kt.liao@emc.com.tw>
+ * Version: 1.6.2
  *
  * Based on cyapa driver:
  * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
@@ -40,7 +41,7 @@
 #include "elan_i2c.h"
 
 #define DRIVER_NAME             "elan_i2c"
-#define ELAN_DRIVER_VERSION     "1.6.1"
+#define ELAN_DRIVER_VERSION     "1.6.2"
 #define ELAN_VENDOR_ID          0x04f3
 #define ETP_MAX_PRESSURE        255
 #define ETP_FWIDTH_REDUCE       90
@@ -199,9 +200,41 @@ static int elan_sleep(struct elan_tp_data *data)
         return error;
 }
 
+static int elan_query_product(struct elan_tp_data *data)
+{
+        int error;
+
+        error = data->ops->get_product_id(data->client, &data->product_id);
+        if (error)
+                return error;
+
+        error = data->ops->get_sm_version(data->client, &data->ic_type,
+                                          &data->sm_version);
+        if (error)
+                return error;
+
+        return 0;
+}
+
+static int elan_check_ASUS_special_fw(struct elan_tp_data *data)
+{
+        if (data->ic_type != 0x0E)
+                return false;
+
+        switch (data->product_id) {
+        case 0x05 ... 0x07:
+        case 0x09:
+        case 0x13:
+                return true;
+        default:
+                return false;
+        }
+}
+
 static int __elan_initialize(struct elan_tp_data *data)
 {
         struct i2c_client *client = data->client;
+        bool woken_up = false;
         int error;
 
         error = data->ops->initialize(client);
@@ -210,6 +243,27 @@ static int __elan_initialize(struct elan_tp_data *data)
                 return error;
         }
 
+        error = elan_query_product(data);
+        if (error)
+                return error;
+
+        /*
+         * Some ASUS devices were shipped with firmware that requires
+         * touchpads to be woken up first, before attempting to switch
+         * them into absolute reporting mode.
+         */
+        if (elan_check_ASUS_special_fw(data)) {
+                error = data->ops->sleep_control(client, false);
+                if (error) {
+                        dev_err(&client->dev,
+                                "failed to wake device up: %d\n", error);
+                        return error;
+                }
+
+                msleep(200);
+                woken_up = true;
+        }
+
         data->mode |= ETP_ENABLE_ABS;
         error = data->ops->set_mode(client, data->mode);
         if (error) {
@@ -218,11 +272,13 @@ static int __elan_initialize(struct elan_tp_data *data)
                 return error;
         }
 
-        error = data->ops->sleep_control(client, false);
-        if (error) {
-                dev_err(&client->dev,
-                        "failed to wake device up: %d\n", error);
-                return error;
+        if (!woken_up) {
+                error = data->ops->sleep_control(client, false);
+                if (error) {
+                        dev_err(&client->dev,
+                                "failed to wake device up: %d\n", error);
+                        return error;
+                }
         }
 
         return 0;
@@ -248,10 +304,6 @@ static int elan_query_device_info(struct elan_tp_data *data)
 {
         int error;
 
-        error = data->ops->get_product_id(data->client, &data->product_id);
-        if (error)
-                return error;
-
         error = data->ops->get_version(data->client, false, &data->fw_version);
         if (error)
                 return error;
@@ -261,11 +313,6 @@ static int elan_query_device_info(struct elan_tp_data *data)
         if (error)
                 return error;
 
-        error = data->ops->get_sm_version(data->client, &data->ic_type,
-                                          &data->sm_version);
-        if (error)
-                return error;
-
         error = data->ops->get_version(data->client, true, &data->iap_version);
         if (error)
                 return error;
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 615d23ec0d8e..08e252a42480 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -222,12 +222,8 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
  */
 static void elantech_packet_dump(struct psmouse *psmouse)
 {
-        int     i;
-
-        psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [");
-        for (i = 0; i < psmouse->pktsize; i++)
-                printk("%s0x%02x ", i ? ", " : " ", psmouse->packet[i]);
-        printk("]\n");
+        psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n",
+                       psmouse->pktsize, psmouse->packet);
 }
 
 /*
diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
index 253df96be427..a73580654c6b 100644
--- a/drivers/input/rmi4/rmi_bus.c
+++ b/drivers/input/rmi4/rmi_bus.c
@@ -232,10 +232,7 @@ err_put_device:
 void rmi_unregister_function(struct rmi_function *fn)
 {
         device_del(&fn->dev);
-
-        if (fn->dev.of_node)
-                of_node_put(fn->dev.of_node);
-
+        of_node_put(fn->dev.of_node);
         put_device(&fn->dev);
 }
 
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 454195709a82..b4d34086e73f 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1277,6 +1277,7 @@ static int __init i8042_create_kbd_port(void)
         serio->start            = i8042_start;
         serio->stop             = i8042_stop;
         serio->close            = i8042_port_close;
+        serio->ps2_cmd_mutex    = &i8042_mutex;
         serio->port_data        = port;
         serio->dev.parent       = &i8042_platform_device->dev;
         strlcpy(serio->name, "i8042 KBD port", sizeof(serio->name));
@@ -1373,21 +1374,6 @@ static void i8042_unregister_ports(void)
         }
 }
 
-/*
- * Checks whether port belongs to i8042 controller.
- */
-bool i8042_check_port_owner(const struct serio *port)
-{
-        int i;
-
-        for (i = 0; i < I8042_NUM_PORTS; i++)
-                if (i8042_ports[i].serio == port)
-                        return true;
-
-        return false;
-}
-EXPORT_SYMBOL(i8042_check_port_owner);
-
 static void i8042_free_irqs(void)
 {
         if (i8042_aux_irq_registered)
diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c
index 316f2c897101..83e9c663aa67 100644
--- a/drivers/input/serio/libps2.c
+++ b/drivers/input/serio/libps2.c
@@ -56,19 +56,17 @@ EXPORT_SYMBOL(ps2_sendbyte);
 
 void ps2_begin_command(struct ps2dev *ps2dev)
 {
-        mutex_lock(&ps2dev->cmd_mutex);
+        struct mutex *m = ps2dev->serio->ps2_cmd_mutex ?: &ps2dev->cmd_mutex;
 
-        if (i8042_check_port_owner(ps2dev->serio))
-                i8042_lock_chip();
+        mutex_lock(m);
 }
 EXPORT_SYMBOL(ps2_begin_command);
 
 void ps2_end_command(struct ps2dev *ps2dev)
 {
-        if (i8042_check_port_owner(ps2dev->serio))
-                i8042_unlock_chip();
+        struct mutex *m = ps2dev->serio->ps2_cmd_mutex ?: &ps2dev->cmd_mutex;
 
-        mutex_unlock(&ps2dev->cmd_mutex);
+        mutex_unlock(m);
 }
 EXPORT_SYMBOL(ps2_end_command);
 
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index ee02dc7422bd..8d893cefb0e3 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1059,6 +1059,30 @@ config TOUCHSCREEN_RM_TS
           To compile this driver as a module, choose M here: the
           module will be called raydium_i2c_ts.
 
+config TOUCHSCREEN_SILEAD
+        tristate "Silead I2C touchscreen"
+        depends on I2C
+        help
+          Say Y here if you have the Silead touchscreen connected to
+          your system.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called silead.
+
+config TOUCHSCREEN_SIS_I2C
+        tristate "SiS 9200 family I2C touchscreen"
+        depends on I2C
+        depends on GPIOLIB || COMPILE_TEST
+        help
+          This enables support for SiS 9200 family over I2C based touchscreens.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called sis_i2c.
+
 config TOUCHSCREEN_ST1232
         tristate "Sitronix ST1232 touchscreen controllers"
         depends on I2C
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 3315882905f7..b4373d6be402 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -64,6 +64,8 @@ obj-$(CONFIG_TOUCHSCREEN_PENMOUNT)	+= penmount.o
 obj-$(CONFIG_TOUCHSCREEN_PIXCIR)        += pixcir_i2c_ts.o
 obj-$(CONFIG_TOUCHSCREEN_RM_TS)         += raydium_i2c_ts.o
 obj-$(CONFIG_TOUCHSCREEN_S3C2410)       += s3c2410_ts.o
+obj-$(CONFIG_TOUCHSCREEN_SILEAD)        += silead.o
+obj-$(CONFIG_TOUCHSCREEN_SIS_I2C)       += sis_i2c.o
 obj-$(CONFIG_TOUCHSCREEN_ST1232)        += st1232.o
 obj-$(CONFIG_TOUCHSCREEN_STMPE)         += stmpe-ts.o
 obj-$(CONFIG_TOUCHSCREEN_SUN4I)         += sun4i-ts.o
diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c
index ddf694b9fffc..fe4848bd1f4c 100644
--- a/drivers/input/touchscreen/ili210x.c
+++ b/drivers/input/touchscreen/ili210x.c
@@ -169,7 +169,7 @@ static ssize_t ili210x_calibrate(struct device *dev,
 
         return count;
 }
-static DEVICE_ATTR(calibrate, 0644, NULL, ili210x_calibrate);
+static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate);
 
 static struct attribute *ili210x_attributes[] = {
         &dev_attr_calibrate.attr,
diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
new file mode 100644
index 000000000000..5f55167855d3
--- /dev/null
+++ b/drivers/input/touchscreen/silead.c
@@ -0,0 +1,568 @@
+/* -------------------------------------------------------------------------
+ * Copyright (C) 2014-2015, Intel Corporation
+ *
+ * Derived from:
+ *  gslX68X.c
+ *  Copyright (C) 2010-2015, Shanghai Sileadinc Co.Ltd
+ *
+ *  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.
+ * -------------------------------------------------------------------------
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
+#include <linux/pm.h>
+#include <linux/irq.h>
+
+#include <asm/unaligned.h>
+
+#define SILEAD_TS_NAME          "silead_ts"
+
+#define SILEAD_REG_RESET        0xE0
+#define SILEAD_REG_DATA         0x80
+#define SILEAD_REG_TOUCH_NR     0x80
+#define SILEAD_REG_POWER        0xBC
+#define SILEAD_REG_CLOCK        0xE4
+#define SILEAD_REG_STATUS       0xB0
+#define SILEAD_REG_ID           0xFC
+#define SILEAD_REG_MEM_CHECK    0xB0
+
+#define SILEAD_STATUS_OK        0x5A5A5A5A
+#define SILEAD_TS_DATA_LEN      44
+#define SILEAD_CLOCK            0x04
+
+#define SILEAD_CMD_RESET        0x88
+#define SILEAD_CMD_START        0x00
+
+#define SILEAD_POINT_DATA_LEN   0x04
+#define SILEAD_POINT_Y_OFF      0x00
+#define SILEAD_POINT_Y_MSB_OFF  0x01
+#define SILEAD_POINT_X_OFF      0x02
+#define SILEAD_POINT_X_MSB_OFF  0x03
+#define SILEAD_TOUCH_ID_MASK    0xF0
+
+#define SILEAD_CMD_SLEEP_MIN    10000
+#define SILEAD_CMD_SLEEP_MAX    20000
+#define SILEAD_POWER_SLEEP      20
+#define SILEAD_STARTUP_SLEEP    30
+
+#define SILEAD_MAX_FINGERS      10
+
+enum silead_ts_power {
+        SILEAD_POWER_ON  = 1,
+        SILEAD_POWER_OFF = 0
+};
+
+struct silead_ts_data {
+        struct i2c_client *client;
+        struct gpio_desc *gpio_power;
+        struct input_dev *input;
+        char fw_name[64];
+        struct touchscreen_properties prop;
+        u32 max_fingers;
+        u32 chip_id;
+        struct input_mt_pos pos[SILEAD_MAX_FINGERS];
+        int slots[SILEAD_MAX_FINGERS];
+        int id[SILEAD_MAX_FINGERS];
+};
+
+struct silead_fw_data {
+        u32 offset;
+        u32 val;
+};
+
+static int silead_ts_request_input_dev(struct silead_ts_data *data)
+{
+        struct device *dev = &data->client->dev;
+        int error;
+
+        data->input = devm_input_allocate_device(dev);
+        if (!data->input) {
+                dev_err(dev,
+                        "Failed to allocate input device\n");
+                return -ENOMEM;
+        }
+
+        input_set_abs_params(data->input, ABS_MT_POSITION_X, 0, 4095, 0, 0);
+        input_set_abs_params(data->input, ABS_MT_POSITION_Y, 0, 4095, 0, 0);
+        touchscreen_parse_properties(data->input, true, &data->prop);
+
+        input_mt_init_slots(data->input, data->max_fingers,
+                            INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED |
+                            INPUT_MT_TRACK);
+
+        data->input->name = SILEAD_TS_NAME;
+        data->input->phys = "input/ts";
+        data->input->id.bustype = BUS_I2C;
+
+        error = input_register_device(data->input);
+        if (error) {
+                dev_err(dev, "Failed to register input device: %d\n", error);
+                return error;
+        }
+
+        return 0;
+}
+
+static void silead_ts_set_power(struct i2c_client *client,
+                                enum silead_ts_power state)
+{
+        struct silead_ts_data *data = i2c_get_clientdata(client);
+
+        if (data->gpio_power) {
+                gpiod_set_value_cansleep(data->gpio_power, state);
+                msleep(SILEAD_POWER_SLEEP);
+        }
+}
+
+static void silead_ts_read_data(struct i2c_client *client)
+{
+        struct silead_ts_data *data = i2c_get_clientdata(client);
+        struct input_dev *input = data->input;
+        struct device *dev = &client->dev;
+        u8 *bufp, buf[SILEAD_TS_DATA_LEN];
+        int touch_nr, error, i;
+
+        error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_DATA,
+                                              SILEAD_TS_DATA_LEN, buf);
+        if (error < 0) {
+                dev_err(dev, "Data read error %d\n", error);
+                return;
+        }
+
+        touch_nr = buf[0];
+        if (touch_nr < 0)
+                return;
+
+        if (touch_nr > data->max_fingers) {
+                dev_warn(dev, "More touches reported then supported %d > %d\n",
+                         touch_nr, data->max_fingers);
+                touch_nr = data->max_fingers;
+        }
+
+        bufp = buf + SILEAD_POINT_DATA_LEN;
+        for (i = 0; i < touch_nr; i++, bufp += SILEAD_POINT_DATA_LEN) {
+                /* Bits 4-7 are the touch id */
+                data->id[i] = (bufp[SILEAD_POINT_X_MSB_OFF] &
+                               SILEAD_TOUCH_ID_MASK) >> 4;
+                touchscreen_set_mt_pos(&data->pos[i], &data->prop,
+                        get_unaligned_le16(&bufp[SILEAD_POINT_X_OFF]) & 0xfff,
+                        get_unaligned_le16(&bufp[SILEAD_POINT_Y_OFF]) & 0xfff);
+        }
+
+        input_mt_assign_slots(input, data->slots, data->pos, touch_nr, 0);
+
+        for (i = 0; i < touch_nr; i++) {
+                input_mt_slot(input, data->slots[i]);
+                input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+                input_report_abs(input, ABS_MT_POSITION_X, data->pos[i].x);
+                input_report_abs(input, ABS_MT_POSITION_Y, data->pos[i].y);
+
+                dev_dbg(dev, "x=%d y=%d hw_id=%d sw_id=%d\n", data->pos[i].x,
+                        data->pos[i].y, data->id[i], data->slots[i]);
+        }
+
+        input_mt_sync_frame(input);
+        input_sync(input);
+}
+
+static int silead_ts_init(struct i2c_client *client)
+{
+        struct silead_ts_data *data = i2c_get_clientdata(client);
+        int error;
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
+                                          SILEAD_CMD_RESET);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR,
+                                        data->max_fingers);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
+                                          SILEAD_CLOCK);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
+                                          SILEAD_CMD_START);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        return 0;
+
+i2c_write_err:
+        dev_err(&client->dev, "Registers clear error %d\n", error);
+        return error;
+}
+
+static int silead_ts_reset(struct i2c_client *client)
+{
+        int error;
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
+                                          SILEAD_CMD_RESET);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
+                                          SILEAD_CLOCK);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_POWER,
+                                          SILEAD_CMD_START);
+        if (error)
+                goto i2c_write_err;
+        usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
+
+        return 0;
+
+i2c_write_err:
+        dev_err(&client->dev, "Chip reset error %d\n", error);
+        return error;
+}
+
+static int silead_ts_startup(struct i2c_client *client)
+{
+        int error;
+
+        error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, 0x00);
+        if (error) {
+                dev_err(&client->dev, "Startup error %d\n", error);
+                return error;
+        }
+
+        msleep(SILEAD_STARTUP_SLEEP);
+
+        return 0;
+}
+
+static int silead_ts_load_fw(struct i2c_client *client)
+{
+        struct device *dev = &client->dev;
+        struct silead_ts_data *data = i2c_get_clientdata(client);
+        unsigned int fw_size, i;
+        const struct firmware *fw;
+        struct silead_fw_data *fw_data;
+        int error;
+
+        dev_dbg(dev, "Firmware file name: %s", data->fw_name);
+
+        error = request_firmware(&fw, data->fw_name, dev);
+        if (error) {
+                dev_err(dev, "Firmware request error %d\n", error);
+                return error;
+        }
+
+        fw_size = fw->size / sizeof(*fw_data);
+        fw_data = (struct silead_fw_data *)fw->data;
+
+        for (i = 0; i < fw_size; i++) {
+                error = i2c_smbus_write_i2c_block_data(client,
+                                                       fw_data[i].offset,
+                                                       4,
+                                                       (u8 *)&fw_data[i].val);
+                if (error) {
+                        dev_err(dev, "Firmware load error %d\n", error);
+                        break;
+                }
+        }
+
+        release_firmware(fw);
+        return error ?: 0;
+}
+
+static u32 silead_ts_get_status(struct i2c_client *client)
+{
+        int error;
+        __le32 status;
+
+        error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_STATUS,
+                                              sizeof(status), (u8 *)&status);
+        if (error < 0) {
+                dev_err(&client->dev, "Status read error %d\n", error);
+                return error;
+        }
+
+        return le32_to_cpu(status);
+}
+
+static int silead_ts_get_id(struct i2c_client *client)
+{
+        struct silead_ts_data *data = i2c_get_clientdata(client);
+        __le32 chip_id;
+        int error;
+
+        error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID,
+                                              sizeof(chip_id), (u8 *)&chip_id);
+        if (error < 0) {
+                dev_err(&client->dev, "Chip ID read error %d\n", error);
+                return error;
+        }
+
+        data->chip_id = le32_to_cpu(chip_id);
+        dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id);
+
+        return 0;
+}
+
+static int silead_ts_setup(struct i2c_client *client)
+{
+        int error;
+        u32 status;
+
+        silead_ts_set_power(client, SILEAD_POWER_OFF);
+        silead_ts_set_power(client, SILEAD_POWER_ON);
+
+        error = silead_ts_get_id(client);
+        if (error)
+                return error;
+
+        error = silead_ts_init(client);
+        if (error)
+                return error;
+
+        error = silead_ts_reset(client);
+        if (error)
+                return error;
+
+        error = silead_ts_load_fw(client);
+        if (error)
+                return error;
+
+        error = silead_ts_startup(client);
+        if (error)
+                return error;
+
+        status = silead_ts_get_status(client);
+        if (status != SILEAD_STATUS_OK) {
+                dev_err(&client->dev,
+                        "Initialization error, status: 0x%X\n", status);
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+static irqreturn_t silead_ts_threaded_irq_handler(int irq, void *id)
+{
+        struct silead_ts_data *data = id;
+        struct i2c_client *client = data->client;
+
+        silead_ts_read_data(client);
+
+        return IRQ_HANDLED;
+}
+
+static void silead_ts_read_props(struct i2c_client *client)
+{
+        struct silead_ts_data *data = i2c_get_clientdata(client);
+        struct device *dev = &client->dev;
+        const char *str;
+        int error;
+
+        error = device_property_read_u32(dev, "silead,max-fingers",
+                                         &data->max_fingers);
+        if (error) {
+                dev_dbg(dev, "Max fingers read error %d\n", error);
+                data->max_fingers = 5; /* Most devices handle up-to 5 fingers */
+        }
+
+        error = device_property_read_string(dev, "touchscreen-fw-name", &str);
+        if (!error)
+                snprintf(data->fw_name, sizeof(data->fw_name), "%s", str);
+        else
+                dev_dbg(dev, "Firmware file name read error. Using default.");
+}
+
+#ifdef CONFIG_ACPI
+static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
+                                         const struct i2c_device_id *id)
+{
+        const struct acpi_device_id *acpi_id;
+        struct device *dev = &data->client->dev;
+        int i;
+
+        if (ACPI_HANDLE(dev)) {
+                acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
+                if (!acpi_id)
+                        return -ENODEV;
+
+                snprintf(data->fw_name, sizeof(data->fw_name), "%s.fw",
+                        acpi_id->id);
+
+                for (i = 0; i < strlen(data->fw_name); i++)
+                        data->fw_name[i] = tolower(data->fw_name[i]);
+        } else {
+                snprintf(data->fw_name, sizeof(data->fw_name), "%s.fw",
+                        id->name);
+        }
+
+        return 0;
+}
+#else
+static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
+                                         const struct i2c_device_id *id)
+{
+        snprintf(data->fw_name, sizeof(data->fw_name), "%s.fw", id->name);
+        return 0;
+}
+#endif
+
+static int silead_ts_probe(struct i2c_client *client,
+                           const struct i2c_device_id *id)
+{
+        struct silead_ts_data *data;
+        struct device *dev = &client->dev;
+        int error;
+
+        if (!i2c_check_functionality(client->adapter,
+                                     I2C_FUNC_I2C |
+                                     I2C_FUNC_SMBUS_READ_I2C_BLOCK |
+                                     I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) {
+                dev_err(dev, "I2C functionality check failed\n");
+                return -ENXIO;
+        }
+
+        data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+
+        i2c_set_clientdata(client, data);
+        data->client = client;
+
+        error = silead_ts_set_default_fw_name(data, id);
+        if (error)
+                return error;
+
+        silead_ts_read_props(client);
+
+        /* We must have the IRQ provided by DT or ACPI subsytem */
+        if (client->irq <= 0)
+                return -ENODEV;
+
+        /* Power GPIO pin */
+        data->gpio_power = gpiod_get_optional(dev, "power", GPIOD_OUT_LOW);
+        if (IS_ERR(data->gpio_power)) {
+                if (PTR_ERR(data->gpio_power) != -EPROBE_DEFER)
+                        dev_err(dev, "Shutdown GPIO request failed\n");
+                return PTR_ERR(data->gpio_power);
+        }
+
+        error = silead_ts_setup(client);
+        if (error)
+                return error;
+
+        error = silead_ts_request_input_dev(data);
+        if (error)
+                return error;
+
+        error = devm_request_threaded_irq(dev, client->irq,
+                                          NULL, silead_ts_threaded_irq_handler,
+                                          IRQF_ONESHOT, client->name, data);
+        if (error) {
+                if (error != -EPROBE_DEFER)
+                        dev_err(dev, "IRQ request failed %d\n", error);
+                return error;
+        }
+
+        return 0;
+}
+
+static int __maybe_unused silead_ts_suspend(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+
+        silead_ts_set_power(client, SILEAD_POWER_OFF);
+        return 0;
+}
+
+static int __maybe_unused silead_ts_resume(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        int error, status;
+
+        silead_ts_set_power(client, SILEAD_POWER_ON);
+
+        error = silead_ts_reset(client);
+        if (error)
+                return error;
+
+        error = silead_ts_startup(client);
+        if (error)
+                return error;
+
+        status = silead_ts_get_status(client);
+        if (status != SILEAD_STATUS_OK) {
+                dev_err(dev, "Resume error, status: 0x%02x\n", status);
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(silead_ts_pm, silead_ts_suspend, silead_ts_resume);
+
+static const struct i2c_device_id silead_ts_id[] = {
+        { "gsl1680", 0 },
+        { "gsl1688", 0 },
+        { "gsl3670", 0 },
+        { "gsl3675", 0 },
+        { "gsl3692", 0 },
+        { "mssl1680", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, silead_ts_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id silead_ts_acpi_match[] = {
+        { "GSL1680", 0 },
+        { "GSL1688", 0 },
+        { "GSL3670", 0 },
+        { "GSL3675", 0 },
+        { "GSL3692", 0 },
+        { "MSSL1680", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(acpi, silead_ts_acpi_match);
+#endif
+
+static struct i2c_driver silead_ts_driver = {
+        .probe = silead_ts_probe,
+        .id_table = silead_ts_id,
+        .driver = {
+                .name = SILEAD_TS_NAME,
+                .acpi_match_table = ACPI_PTR(silead_ts_acpi_match),
+                .pm = &silead_ts_pm,
+        },
+};
+module_i2c_driver(silead_ts_driver);
+
+MODULE_AUTHOR("Robert Dolca <robert.dolca@intel.com>");
+MODULE_DESCRIPTION("Silead I2C touchscreen driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/sis_i2c.c b/drivers/input/touchscreen/sis_i2c.c
new file mode 100644
index 000000000000..8d93f8c9a403
--- /dev/null
+++ b/drivers/input/touchscreen/sis_i2c.c
@@ -0,0 +1,413 @@
+/*
+ * Touch Screen driver for SiS 9200 family I2C Touch panels
+ *
+ * Copyright (C) 2015 SiS, Inc.
+ * Copyright (C) 2016 Nextfour Group
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#include <linux/crc-itu-t.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#define SIS_I2C_NAME            "sis_i2c_ts"
+
+/*
+ * The I2C packet format:
+ * le16         byte count
+ * u8           Report ID
+ * <contact data - variable length>
+ * u8           Number of contacts
+ * le16         Scan Time (optional)
+ * le16         CRC
+ *
+ * One touch point information consists of 6+ bytes, the order is:
+ * u8           contact state
+ * u8           finger id
+ * le16         x axis
+ * le16         y axis
+ * u8           contact width (optional)
+ * u8           contact height (optional)
+ * u8           pressure (optional)
+ *
+ * Maximum amount of data transmitted in one shot is 64 bytes, if controller
+ * needs to report more contacts than fit in one packet it will send true
+ * number of contacts in first packet and 0 as number of contacts in second
+ * packet.
+ */
+
+#define SIS_MAX_PACKET_SIZE             64
+
+#define SIS_PKT_LEN_OFFSET              0
+#define SIS_PKT_REPORT_OFFSET           2 /* Report ID/type */
+#define SIS_PKT_CONTACT_OFFSET          3 /* First contact */
+
+#define SIS_SCAN_TIME_LEN               2
+
+/* Supported report types */
+#define SIS_ALL_IN_ONE_PACKAGE          0x10
+#define SIS_PKT_IS_TOUCH(x)             (((x) & 0x0f) == 0x01)
+#define SIS_PKT_IS_HIDI2C(x)            (((x) & 0x0f) == 0x06)
+
+/* Contact properties within report */
+#define SIS_PKT_HAS_AREA(x)             ((x) & BIT(4))
+#define SIS_PKT_HAS_PRESSURE(x)         ((x) & BIT(5))
+#define SIS_PKT_HAS_SCANTIME(x)         ((x) & BIT(6))
+
+/* Contact size */
+#define SIS_BASE_LEN_PER_CONTACT        6
+#define SIS_AREA_LEN_PER_CONTACT        2
+#define SIS_PRESSURE_LEN_PER_CONTACT    1
+
+/* Offsets within contact data */
+#define SIS_CONTACT_STATUS_OFFSET       0
+#define SIS_CONTACT_ID_OFFSET           1 /* Contact ID */
+#define SIS_CONTACT_X_OFFSET            2
+#define SIS_CONTACT_Y_OFFSET            4
+#define SIS_CONTACT_WIDTH_OFFSET        6
+#define SIS_CONTACT_HEIGHT_OFFSET       7
+#define SIS_CONTACT_PRESSURE_OFFSET(id) (SIS_PKT_HAS_AREA(id) ? 8 : 6)
+
+/* Individual contact state */
+#define SIS_STATUS_UP                   0x0
+#define SIS_STATUS_DOWN                 0x3
+
+/* Touchscreen parameters */
+#define SIS_MAX_FINGERS                 10
+#define SIS_MAX_X                       4095
+#define SIS_MAX_Y                       4095
+#define SIS_MAX_PRESSURE                255
+
+/* Resolution diagonal */
+#define SIS_AREA_LENGTH_LONGER          5792
+/*((SIS_MAX_X^2) + (SIS_MAX_Y^2))^0.5*/
+#define SIS_AREA_LENGTH_SHORT           5792
+#define SIS_AREA_UNIT                   (5792 / 32)
+
+struct sis_ts_data {
+        struct i2c_client *client;
+        struct input_dev *input;
+
+        struct gpio_desc *attn_gpio;
+        struct gpio_desc *reset_gpio;
+
+        u8 packet[SIS_MAX_PACKET_SIZE];
+};
+
+static int sis_read_packet(struct i2c_client *client, u8 *buf,
+                           unsigned int *num_contacts,
+                           unsigned int *contact_size)
+{
+        int count_idx;
+        int ret;
+        u16 len;
+        u16 crc, pkg_crc;
+        u8 report_id;
+
+        ret = i2c_master_recv(client, buf, SIS_MAX_PACKET_SIZE);
+        if (ret <= 0)
+                return -EIO;
+
+        len = get_unaligned_le16(&buf[SIS_PKT_LEN_OFFSET]);
+        if (len > SIS_MAX_PACKET_SIZE) {
+                dev_err(&client->dev,
+                        "%s: invalid packet length (%d vs %d)\n",
+                        __func__, len, SIS_MAX_PACKET_SIZE);
+                return -E2BIG;
+        }
+
+        if (len < 10)
+                return -EINVAL;
+
+        report_id = buf[SIS_PKT_REPORT_OFFSET];
+        count_idx  = len - 1;
+        *contact_size = SIS_BASE_LEN_PER_CONTACT;
+
+        if (report_id != SIS_ALL_IN_ONE_PACKAGE) {
+                if (SIS_PKT_IS_TOUCH(report_id)) {
+                        /*
+                         * Calculate CRC ignoring packet length
+                         * in the beginning and CRC transmitted
+                         * at the end of the packet.
+                         */
+                        crc = crc_itu_t(0, buf + 2, len - 2 - 2);
+                        pkg_crc = get_unaligned_le16(&buf[len - 2]);
+
+                        if (crc != pkg_crc) {
+                                dev_err(&client->dev,
+                                        "%s: CRC Error (%d vs %d)\n",
+                                        __func__, crc, pkg_crc);
+                                return -EINVAL;
+                        }
+
+                        count_idx -= 2;
+
+                } else if (!SIS_PKT_IS_HIDI2C(report_id)) {
+                        dev_err(&client->dev,
+                                "%s: invalid packet ID %#02x\n",
+                                __func__, report_id);
+                        return -EINVAL;
+                }
+
+                if (SIS_PKT_HAS_SCANTIME(report_id))
+                        count_idx -= SIS_SCAN_TIME_LEN;
+
+                if (SIS_PKT_HAS_AREA(report_id))
+                        *contact_size += SIS_AREA_LEN_PER_CONTACT;
+                if (SIS_PKT_HAS_PRESSURE(report_id))
+                        *contact_size += SIS_PRESSURE_LEN_PER_CONTACT;
+        }
+
+        *num_contacts = buf[count_idx];
+        return 0;
+}
+
+static int sis_ts_report_contact(struct sis_ts_data *ts, const u8 *data, u8 id)
+{
+        struct input_dev *input = ts->input;
+        int slot;
+        u8 status = data[SIS_CONTACT_STATUS_OFFSET];
+        u8 pressure;
+        u8 height, width;
+        u16 x, y;
+
+        if (status != SIS_STATUS_DOWN && status != SIS_STATUS_UP) {
+                dev_err(&ts->client->dev, "Unexpected touch status: %#02x\n",
+                        data[SIS_CONTACT_STATUS_OFFSET]);
+                return -EINVAL;
+        }
+
+        slot = input_mt_get_slot_by_key(input, data[SIS_CONTACT_ID_OFFSET]);
+        if (slot < 0)
+                return -ENOENT;
+
+        input_mt_slot(input, slot);
+        input_mt_report_slot_state(input, MT_TOOL_FINGER,
+                                   status == SIS_STATUS_DOWN);
+
+        if (status == SIS_STATUS_DOWN) {
+                pressure = height = width = 1;
+                if (id != SIS_ALL_IN_ONE_PACKAGE) {
+                        if (SIS_PKT_HAS_AREA(id)) {
+                                width = data[SIS_CONTACT_WIDTH_OFFSET];
+                                height = data[SIS_CONTACT_HEIGHT_OFFSET];
+                        }
+
+                        if (SIS_PKT_HAS_PRESSURE(id))
+                                pressure =
+                                        data[SIS_CONTACT_PRESSURE_OFFSET(id)];
+                }
+
+                x = get_unaligned_le16(&data[SIS_CONTACT_X_OFFSET]);
+                y = get_unaligned_le16(&data[SIS_CONTACT_Y_OFFSET]);
+
+                input_report_abs(input, ABS_MT_TOUCH_MAJOR,
+                                 width * SIS_AREA_UNIT);
+                input_report_abs(input, ABS_MT_TOUCH_MINOR,
+                                 height * SIS_AREA_UNIT);
+                input_report_abs(input, ABS_MT_PRESSURE, pressure);
+                input_report_abs(input, ABS_MT_POSITION_X, x);
+                input_report_abs(input, ABS_MT_POSITION_Y, y);
+        }
+
+        return 0;
+}
+
+static void sis_ts_handle_packet(struct sis_ts_data *ts)
+{
+        const u8 *contact;
+        unsigned int num_to_report = 0;
+        unsigned int num_contacts;
+        unsigned int num_reported;
+        unsigned int contact_size;
+        int error;
+        u8 report_id;
+
+        do {
+                error = sis_read_packet(ts->client, ts->packet,
+                                        &num_contacts, &contact_size);
+                if (error)
+                        break;
+
+                if (num_to_report == 0) {
+                        num_to_report = num_contacts;
+                } else if (num_contacts != 0) {
+                        dev_err(&ts->client->dev,
+                                "%s: nonzero (%d) point count in tail packet\n",
+                                __func__, num_contacts);
+                        break;
+                }
+
+                report_id = ts->packet[SIS_PKT_REPORT_OFFSET];
+                contact = &ts->packet[SIS_PKT_CONTACT_OFFSET];
+                num_reported = 0;
+
+                while (num_to_report > 0) {
+                        error = sis_ts_report_contact(ts, contact, report_id);
+                        if (error)
+                                break;
+
+                        contact += contact_size;
+                        num_to_report--;
+                        num_reported++;
+
+                        if (report_id != SIS_ALL_IN_ONE_PACKAGE &&
+                            num_reported >= 5) {
+                                /*
+                                 * The remainder of contacts is sent
+                                 * in the 2nd packet.
+                                 */
+                                break;
+                        }
+                }
+        } while (num_to_report > 0);
+
+        input_mt_sync_frame(ts->input);
+        input_sync(ts->input);
+}
+
+static irqreturn_t sis_ts_irq_handler(int irq, void *dev_id)
+{
+        struct sis_ts_data *ts = dev_id;
+
+        do {
+                sis_ts_handle_packet(ts);
+        } while (ts->attn_gpio && gpiod_get_value_cansleep(ts->attn_gpio));
+
+        return IRQ_HANDLED;
+}
+
+static void sis_ts_reset(struct sis_ts_data *ts)
+{
+        if (ts->reset_gpio) {
+                /* Get out of reset */
+                usleep_range(1000, 2000);
+                gpiod_set_value(ts->reset_gpio, 1);
+                usleep_range(1000, 2000);
+                gpiod_set_value(ts->reset_gpio, 0);
+                msleep(100);
+        }
+}
+
+static int sis_ts_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct sis_ts_data *ts;
+        struct input_dev *input;
+        int error;
+
+        ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
+        if (!ts)
+                return -ENOMEM;
+
+        ts->client = client;
+        i2c_set_clientdata(client, ts);
+
+        ts->attn_gpio = devm_gpiod_get_optional(&client->dev,
+                                                "attn", GPIOD_IN);
+        if (IS_ERR(ts->attn_gpio)) {
+                error = PTR_ERR(ts->attn_gpio);
+                if (error != -EPROBE_DEFER)
+                        dev_err(&client->dev,
+                                "Failed to get attention GPIO: %d\n", error);
+                return error;
+        }
+
+        ts->reset_gpio = devm_gpiod_get_optional(&client->dev,
+                                                 "reset", GPIOD_OUT_LOW);
+        if (IS_ERR(ts->reset_gpio)) {
+                error = PTR_ERR(ts->reset_gpio);
+                if (error != -EPROBE_DEFER)
+                        dev_err(&client->dev,
+                                "Failed to get reset GPIO: %d\n", error);
+                return error;
+        }
+
+        sis_ts_reset(ts);
+
+        ts->input = input = devm_input_allocate_device(&client->dev);
+        if (!input) {
+                dev_err(&client->dev, "Failed to allocate input device\n");
+                return -ENOMEM;
+        }
+
+        input->name = "SiS Touchscreen";
+        input->id.bustype = BUS_I2C;
+
+        input_set_abs_params(input, ABS_MT_POSITION_X, 0, SIS_MAX_X, 0, 0);
+        input_set_abs_params(input, ABS_MT_POSITION_Y, 0, SIS_MAX_Y, 0, 0);
+        input_set_abs_params(input, ABS_MT_PRESSURE, 0, SIS_MAX_PRESSURE, 0, 0);
+        input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
+                             0, SIS_AREA_LENGTH_LONGER, 0, 0);
+        input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
+                             0, SIS_AREA_LENGTH_SHORT, 0, 0);
+
+        error = input_mt_init_slots(input, SIS_MAX_FINGERS, INPUT_MT_DIRECT);
+        if (error) {
+                dev_err(&client->dev,
+                        "Failed to initialize MT slots: %d\n", error);
+                return error;
+        }
+
+        error = devm_request_threaded_irq(&client->dev, client->irq,
+                                          NULL, sis_ts_irq_handler,
+                                          IRQF_ONESHOT,
+                                          client->name, ts);
+        if (error) {
+                dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
+                return error;
+        }
+
+        error = input_register_device(ts->input);
+        if (error) {
+                dev_err(&client->dev,
+                        "Failed to register input device: %d\n", error);
+                return error;
+        }
+
+        return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id sis_ts_dt_ids[] = {
+        { .compatible = "sis,9200-ts" },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sis_ts_dt_ids);
+#endif
+
+static const struct i2c_device_id sis_ts_id[] = {
+        { SIS_I2C_NAME, 0 },
+        { "9200-ts",    0 },
+        { /* sentinel */  }
+};
+MODULE_DEVICE_TABLE(i2c, sis_ts_id);
+
+static struct i2c_driver sis_ts_driver = {
+        .driver = {
+                .name   = SIS_I2C_NAME,
+                .of_match_table = of_match_ptr(sis_ts_dt_ids),
+        },
+        .probe          = sis_ts_probe,
+        .id_table       = sis_ts_id,
+};
+module_i2c_driver(sis_ts_driver);
+
+MODULE_DESCRIPTION("SiS 9200 Family Touchscreen Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Mika Penttilä <mika.penttila@nextfour.com>");
diff --git a/include/linux/i8042.h b/include/linux/i8042.h
index 0f9bafa17a02..d98780ca9604 100644
--- a/include/linux/i8042.h
+++ b/include/linux/i8042.h
@@ -62,7 +62,6 @@ struct serio;
 void i8042_lock_chip(void);
 void i8042_unlock_chip(void);
 int i8042_command(unsigned char *param, int command);
-bool i8042_check_port_owner(const struct serio *);
 int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
                                         struct serio *serio));
 int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
@@ -83,11 +82,6 @@ static inline int i8042_command(unsigned char *param, int command)
         return -ENODEV;
 }
 
-static inline bool i8042_check_port_owner(const struct serio *serio)
-{
-        return false;
-}
-
 static inline int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
                                         struct serio *serio))
 {
diff --git a/include/linux/serio.h b/include/linux/serio.h
index df4ab5de1586..c733cff44e18 100644
--- a/include/linux/serio.h
+++ b/include/linux/serio.h
@@ -31,7 +31,8 @@ struct serio {
 
         struct serio_device_id id;
 
-        spinlock_t lock;                /* protects critical sections from port's interrupt handler */
+        /* Protects critical sections from port's interrupt handler */
+        spinlock_t lock;
 
         int (*write)(struct serio *, unsigned char);
         int (*open)(struct serio *);
@@ -40,16 +41,29 @@ struct serio {
         void (*stop)(struct serio *);
 
         struct serio *parent;
-        struct list_head child_node;    /* Entry in parent->children list */
+        /* Entry in parent->children list */
+        struct list_head child_node;
         struct list_head children;
-        unsigned int depth;             /* level of nesting in serio hierarchy */
+        /* Level of nesting in serio hierarchy */
+        unsigned int depth;
 
-        struct serio_driver *drv;       /* accessed from interrupt, must be protected by serio->lock and serio->sem */
-        struct mutex drv_mutex;         /* protects serio->drv so attributes can pin driver */
+        /*
+         * serio->drv is accessed from interrupt handlers; when modifying
+         * caller should acquire serio->drv_mutex and serio->lock.
+         */
+        struct serio_driver *drv;
+        /* Protects serio->drv so attributes can pin current driver */
+        struct mutex drv_mutex;
 
         struct device dev;
 
         struct list_head node;
+
+        /*
+         * For use by PS/2 layer when several ports share hardware and
+         * may get indigestion when exposed to concurrent access (i8042).
+         */
+        struct mutex *ps2_cmd_mutex;
 };
 #define to_serio_port(d)        container_of(d, struct serio, dev)