superio/ite/it8623e: initialize the PWM fan controller

Copies the common/env_ctrl support code from the it8728f driver.

Tested on an ASUS AM1I-A using Linux 4.16.7-gentoo as payload,
and booting userspace without a kexec call.

Prior to this change, an error was given during boot:

it87 it87.656: Detected broken BIOS defaults, disabling PWM interface

After this change, the message is gone, and PWM fan control works
through the /sys/class/hwmon interface.

Change-Id: Id97c4ec19562e7c78308c5afe6ff7c938922c9e7
Signed-off-by: Kevin Cody-Little <kcodyjr@gmail.com>
Reviewed-on: https://review.coreboot.org/26224
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/superio/ite/it8623e/chip.h b/src/superio/ite/it8623e/chip.h
new file mode 100644
index 0000000000..c92b4512f7
--- /dev/null
+++ b/src/superio/ite/it8623e/chip.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
+ *
+ * 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.
+ */
+
+#ifndef SUPERIO_ITE_IT8623E_CHIP_H
+#define SUPERIO_ITE_IT8623E_CHIP_H
+
+#include <superio/ite/common/env_ctrl_chip.h>
+
+struct superio_ite_it8623e_config {
+	struct ite_ec_config ec;
+};
+
+#endif /* SUPERIO_ITE_IT8623E_CHIP_H */