From 33c7a0738c5f753a7d94fd3b2ec7d84e79a141a8 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: ACPI: EC: "Fake ECDT" workaround is not needed any longer. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 81 ------------------------------------------------------- 1 file changed, 81 deletions(-) (limited to 'drivers/acpi/ec.c') 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; -- cgit v1.2.3