[PATCH v5 3/7] platform/x86: topstar-laptop: split ACPI events and input handling

[Guillaume Douézan-Grard]

* get the `acpi_device` from the `topstar_laptop` struct,

* split input registering and `sparse_keymap` events from ACPI events
handling,

* use notify, init and exit functions for ACPI and input handling

Signed-off-by: Guillaume Douézan-Grard <gdouezangr...@gmail.com>
---
 drivers/platform/x86/topstar-laptop.c | 109 ++++++++++++++++++++++------------
 1 file changed, 71 insertions(+), 38 deletions(-)

diff --git a/drivers/platform/x86/topstar-laptop.c 
b/drivers/platform/x86/topstar-laptop.c
index 17f22a085d9a..fbf020e8a0e1 100644
--- a/drivers/platform/x86/topstar-laptop.c
+++ b/drivers/platform/x86/topstar-laptop.c
@@ -24,9 +24,14 @@
 #define TOPSTAR_LAPTOP_CLASS "topstar"
 
 struct topstar_laptop {
+       struct acpi_device *device;
        struct input_dev *input;
 };
 
+/*
+ * Input
+ */
+
 static const struct key_entry topstar_keymap[] = {
        { KE_KEY, 0x80, { KEY_BRIGHTNESSUP } },
        { KE_KEY, 0x81, { KEY_BRIGHTNESSDOWN } },
@@ -57,40 +62,12 @@ static const struct key_entry topstar_keymap[] = {
        { KE_END, 0 }
 };
 
-static void topstar_acpi_notify(struct acpi_device *device, u32 event)
+static void topstar_input_notify(struct topstar_laptop *topstar, int event)
 {
-       static bool dup_evnt[2];
-       bool *dup;
-       struct topstar_laptop *topstar = acpi_driver_data(device);
-
-       /* 0x83 and 0x84 key events comes duplicated... */
-       if (event == 0x83 || event == 0x84) {
-               dup = &dup_evnt[event - 0x83];
-               if (*dup) {
-                       *dup = false;
-                       return;
-               }
-               *dup = true;
-       }
-
        if (!sparse_keymap_report_event(topstar->input, event, 1, true))
                pr_info("unknown event = 0x%02x\n", event);
 }
 
-static int topstar_acpi_fncx_switch(struct acpi_device *device, bool state)
-{
-       acpi_status status;
-
-       status = acpi_execute_simple_method(device->handle, "FNCX",
-                                               state ? 0x86 : 0x87);
-       if (ACPI_FAILURE(status)) {
-               pr_err("Unable to switch FNCX notifications\n");
-               return -ENODEV;
-       }
-
-       return 0;
-}
-
 static int topstar_input_init(struct topstar_laptop *topstar)
 {
        struct input_dev *input;
@@ -124,9 +101,62 @@ static int topstar_input_init(struct topstar_laptop 
*topstar)
        return err;
 }
 
+static void topstar_input_exit(struct topstar_laptop *topstar)
+{
+       input_unregister_device(topstar->input);
+}
+
+/*
+ * ACPI
+ */
+
+static int topstar_acpi_fncx_switch(struct acpi_device *device, bool state)
+{
+       acpi_status status;
+       u64 arg = state ? 0x86 : 0x87;
+
+       status = acpi_execute_simple_method(device->handle, "FNCX", arg);
+       if (ACPI_FAILURE(status)) {
+               pr_err("Unable to switch FNCX notifications\n");
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+static void topstar_acpi_notify(struct acpi_device *device, u32 event)
+{
+       struct topstar_laptop *topstar = acpi_driver_data(device);
+       static bool dup_evnt[2];
+       bool *dup;
+
+       /* 0x83 and 0x84 key events comes duplicated... */
+       if (event == 0x83 || event == 0x84) {
+               dup = &dup_evnt[event - 0x83];
+               if (*dup) {
+                       *dup = false;
+                       return;
+               }
+               *dup = true;
+       }
+
+       topstar_input_notify(topstar, event);
+}
+
+static int topstar_acpi_init(struct topstar_laptop *topstar)
+{
+       return topstar_acpi_fncx_switch(topstar->device, true);
+}
+
+static void topstar_acpi_exit(struct topstar_laptop *topstar)
+{
+       topstar_acpi_fncx_switch(topstar->device, false);
+}
+
 static int topstar_acpi_add(struct acpi_device *device)
 {
        struct topstar_laptop *topstar;
+       int err;
 
        topstar = kzalloc(sizeof(struct topstar_laptop), GFP_KERNEL);
        if (!topstar)
@@ -134,30 +164,34 @@ static int topstar_acpi_add(struct acpi_device *device)
 
        strcpy(acpi_device_name(device), "Topstar TPSACPI");
        strcpy(acpi_device_class(device), TOPSTAR_LAPTOP_CLASS);
+       device->driver_data = topstar;
+       topstar->device = device;
 
-       if (topstar_acpi_fncx_switch(device, true))
+       err = topstar_acpi_init(topstar);
+       if (err)
                goto err_free;
 
-       if (topstar_input_init(topstar))
-               goto err_free;
+       err = topstar_input_init(topstar);
+       if (err)
+               goto err_acpi_exit;
 
-       device->driver_data = topstar;
        return 0;
 
+err_acpi_exit:
+       topstar_acpi_exit(topstar);
 err_free:
        kfree(topstar);
-       return -ENODEV;
+       return err;
 }
 
 static int topstar_acpi_remove(struct acpi_device *device)
 {
        struct topstar_laptop *topstar = acpi_driver_data(device);
 
-       topstar_acpi_fncx_switch(device, false);
+       topstar_input_exit(topstar);
+       topstar_acpi_exit(topstar);
 
-       input_unregister_device(topstar->input);
        kfree(topstar);
-
        return 0;
 }
 
@@ -188,7 +222,6 @@ static int __init topstar_laptop_init(void)
                return ret;
 
        pr_info("ACPI extras driver loaded\n");
-
        return 0;
 }
 
-- 
2.16.1