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/*
*
* (C) COPYRIGHT 2014 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/scpi_protocol.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
#include <linux/pm_opp.h>
#else /* Linux >= 3.13 */
/* In 3.13 the OPP include header file, types, and functions were all
* renamed. Use the old filename for the include, and define the new names to
* the old, when an old kernel is detected.
*/
#include <linux/opp.h>
#define dev_pm_opp_add opp_add
#endif /* Linux >= 3.13 */
static int init_juno_opps_from_scpi(struct device *dev)
{
struct scpi_opp *sopp;
int i;
/* Hard coded for Juno. 2 is GPU domain */
sopp = scpi_dvfs_get_opps(2);
if (IS_ERR_OR_NULL(sopp))
return PTR_ERR(sopp);
for (i = 0; i < sopp->count; i++) {
struct scpi_opp_entry *e = &sopp->opp[i];
dev_info(dev, "Mali OPP from SCPI: %u Hz @ %u mV\n",
e->freq_hz, e->volt_mv);
dev_pm_opp_add(dev, e->freq_hz, e->volt_mv * 1000);
}
return 0;
}
static int juno_setup_opps(void)
{
struct device_node *np;
struct platform_device *pdev;
int err;
np = of_find_node_by_name(NULL, "gpu");
if (!np) {
pr_err("Failed to find DT entry for Mali\n");
return -EFAULT;
}
pdev = of_find_device_by_node(np);
if (!pdev) {
pr_err("Failed to find device for Mali\n");
of_node_put(np);
return -EFAULT;
}
err = init_juno_opps_from_scpi(&pdev->dev);
of_node_put(np);
return err;
}
module_init(juno_setup_opps);
MODULE_LICENSE("GPL");
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