src/soc/intel/baytrail/lpe.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2013 Google Inc.
 *
 * 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; version 2 of the License.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>

#include <baytrail/iosf.h>
#include <baytrail/ramstage.h>

static void lpe_init(device_t dev)
{
	uint32_t reg;

	/* Work around for Audio Clock. */
	reg = iosf_ccu_read(PLT_CLK_CTRL_3);
	reg &= ~0xff;
	reg |= PLT_CLK_CTRL_25MHZ_FREQ | PLT_CLK_CTRL_SELECT_FREQ;
	iosf_ccu_write(PLT_CLK_CTRL_3, reg);
}

static const struct device_operations device_ops = {
	.read_resources		= pci_dev_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= NULL,
	.init			= lpe_init,
	.enable			= NULL,
	.scan_bus		= NULL,
	.ops_pci		= &soc_pci_ops,
};

static const struct pci_driver southcluster __pci_driver = {
	.ops		= &device_ops,
	.vendor		= PCI_VENDOR_ID_INTEL,
	.device		= LPE_DEVID,
};