synaptics_dsx_force: symlink input device to /proc/touchpanel

Change-Id: I5bf1291aa22b889522585a3faeab5f96ff6612e2

diff --git a/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.c b/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.c
index f4c0386..2f474f1 100644 (file)
--- a/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.c
+++ b/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.c
@@ -34,6 +34,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/proc_fs.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
@@ -62,6 +63,8 @@
 #define INPUT_PHYS_NAME "synaptics_dsx/touch_input"
 #define STYLUS_PHYS_NAME "synaptics_dsx/stylus"
 
+#define PROC_SYMLINK_PATH "touchpanel"
+
 #define VIRTUAL_KEY_MAP_FILE_NAME "virtualkeys." PLATFORM_DRIVER_NAME
 
 #ifdef KERNEL_ABOVE_2_6_38
@@ -4021,6 +4024,36 @@ static int synaptics_rmi4_input_event(struct input_dev *dev,
        return 0;
 }
 
+static ssize_t synaptics_rmi4_input_symlink(struct synaptics_rmi4_data *rmi4_data) {
+       char *driver_path;
+       int ret = 0;
+
+       if (rmi4_data->input_proc) {
+               proc_remove(rmi4_data->input_proc);
+               rmi4_data->input_proc = NULL;
+       }
+
+       driver_path = kzalloc(PATH_MAX, GFP_KERNEL);
+       if (!driver_path) {
+               pr_err("%s: failed to allocate memory\n", __func__);
+               return -ENOMEM;
+       }
+
+       sprintf(driver_path, "/sys%s",
+                       kobject_get_path(&rmi4_data->input_dev->dev.kobj, GFP_KERNEL));
+
+       pr_debug("%s: driver_path=%s\n", __func__, driver_path);
+
+       rmi4_data->input_proc = proc_symlink(PROC_SYMLINK_PATH, NULL, driver_path);
+       if (!rmi4_data->input_proc) {
+               ret = -ENOMEM;
+       }
+
+       kfree(driver_path);
+
+       return ret;
+}
+
 static int synaptics_rmi4_set_input_dev(struct synaptics_rmi4_data *rmi4_data)
 {
        int retval;
@@ -4074,6 +4107,13 @@ static int synaptics_rmi4_set_input_dev(struct synaptics_rmi4_data *rmi4_data)
                goto err_register_input;
        }
 
+       retval = synaptics_rmi4_input_symlink(rmi4_data);
+       if (retval < 0) {
+               dev_err(rmi4_data->pdev->dev.parent,
+                               "%s: Failed to symlink input device\n",
+                               __func__);
+       }
+
        if (!rmi4_data->stylus_enable)
                return 0;
 
@@ -4981,6 +5021,7 @@ static int synaptics_rmi4_probe(struct platform_device *pdev)
        rmi4_data->fingers_on_2d = false;
        rmi4_data->wakeup_en = false;
        rmi4_data->enable_reversed_keys = false;
+       rmi4_data->input_proc = NULL;
 
        rmi4_data->reset_device = synaptics_rmi4_reset_device;
        rmi4_data->irq_enable = synaptics_rmi4_irq_enable;

diff --git a/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.h b/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.h
index 37dd1cd..718c11e 100644 (file)
--- a/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.h
+++ b/drivers/input/touchscreen/synaptics_dsx_force/synaptics_dsx_core.h
@@ -436,6 +436,8 @@ struct synaptics_rmi4_data {
        struct clk *core_clk;
        struct clk *iface_clk;
 #endif
+
+       struct proc_dir_entry *input_proc;
 };
 
 struct synaptics_dsx_bus_access {