ACPI: EC: "Fake ECDT" workaround is not needed any longer.

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 0 insertions, 81 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 7828ac5e5e7f..5999abd9909d 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -805,74 +805,6 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
         return 0;
 }
 
-static acpi_status __init
-acpi_fake_ecdt_callback(acpi_handle handle,
-                        u32 Level, void *context, void **retval)
-{
-        acpi_status status;
-
-        mutex_init(&ec_ecdt->lock);
-        atomic_set(&ec_ecdt->event_count, 1);
-        if (acpi_ec_mode == EC_INTR) {
-                init_waitqueue_head(&ec_ecdt->wait);
-        }
-        status = acpi_walk_resources(handle, METHOD_NAME__CRS,
-                                     acpi_ec_io_ports, ec_ecdt);
-        if (ACPI_FAILURE(status))
-                return status;
-
-        ec_ecdt->uid = -1;
-        acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
-
-        status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe);
-        if (ACPI_FAILURE(status))
-                return status;
-        ec_ecdt->handle = handle;
-
-        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx",
-                          ec_ecdt->gpe, ec_ecdt->command_addr,
-                          ec_ecdt->data_addr));
-
-        return AE_CTRL_TERMINATE;
-}
-
-/*
- * Some BIOS (such as some from Gateway laptops) access EC region very early
- * such as in BAT0._INI or EC._INI before an EC device is found and
- * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily
- * required, but if EC regison is accessed early, it is required.
- * The routine tries to workaround the BIOS bug by pre-scan EC device
- * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any
- * op region (since _REG isn't invoked yet). The assumption is true for
- * all systems found.
- */
-static int __init acpi_ec_fake_ecdt(void)
-{
-        acpi_status status;
-        int ret = 0;
-
-        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
-
-        ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
-        if (!ec_ecdt) {
-                ret = -ENOMEM;
-                goto error;
-        }
-
-        status = acpi_get_devices(ACPI_EC_HID,
-                                  acpi_fake_ecdt_callback, NULL, NULL);
-        if (ACPI_FAILURE(status)) {
-                kfree(ec_ecdt);
-                ec_ecdt = NULL;
-                ret = -ENODEV;
-                ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT"));
-                goto error;
-        }
-        return 0;
-      error:
-        return ret;
-}
-
 static int __init acpi_ec_get_real_ecdt(void)
 {
         acpi_status status;
@@ -916,18 +848,12 @@ static int __init acpi_ec_get_real_ecdt(void)
         return -ENODEV;
 }
 
-static int __initdata acpi_fake_ecdt_enabled;
 int __init acpi_ec_ecdt_probe(void)
 {
         acpi_status status;
         int ret;
 
         ret = acpi_ec_get_real_ecdt();
-        /* Try to make a fake ECDT */
-        if (ret && acpi_fake_ecdt_enabled) {
-                ret = acpi_ec_fake_ecdt();
-        }
-
         if (ret)
                 return 0;
 
@@ -1000,13 +926,6 @@ static void __exit acpi_ec_exit(void)
 }
 #endif                          /* 0 */
 
-static int __init acpi_fake_ecdt_setup(char *str)
-{
-        acpi_fake_ecdt_enabled = 1;
-        return 1;
-}
-
-__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup);
 static int __init acpi_ec_set_intr_mode(char *str)
 {
         int intr;