/*
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* Copyright (C) 2010, 2012-2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained from Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/**
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* @file juno_opp.c
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* Example: Set up opp table
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* Using ARM64 juno specific SCPI_PROTOCOL get frequence inform
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* Customer need implement your own platform releated logic
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*/
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#ifdef CONFIG_ARCH_VEXPRESS
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#ifdef CONFIG_MALI_DEVFREQ
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#ifdef CONFIG_ARM64
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#ifdef CONFIG_ARM_SCPI_PROTOCOL
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/scpi_protocol.h>
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
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#include <linux/pm_opp.h>
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#else /* Linux >= 3.13 */
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/* In 3.13 the OPP include header file, types, and functions were all
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* renamed. Use the old filename for the include, and define the new names to
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* the old, when an old kernel is detected.
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*/
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#include <linux/opp.h>
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#define dev_pm_opp_add opp_add
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#define dev_pm_opp_remove opp_remove
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#endif /* Linux >= 3.13 */
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#include "mali_kernel_common.h"
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static int init_juno_opps_from_scpi(struct device *dev)
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{
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struct scpi_dvfs_info *sinfo;
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struct scpi_ops *sops;
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int i;
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sops = get_scpi_ops();
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if (NULL == sops) {
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MALI_DEBUG_PRINT(2, ("Mali didn't get any scpi ops \n"));
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return -1;
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}
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/* Hard coded for Juno. 2 is GPU domain */
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sinfo = sops->dvfs_get_info(2);
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if (IS_ERR_OR_NULL(sinfo))
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return PTR_ERR(sinfo);
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for (i = 0; i < sinfo->count; i++) {
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struct scpi_opp *e = &sinfo->opps[i];
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MALI_DEBUG_PRINT(2, ("Mali OPP from SCPI: %u Hz @ %u mV\n", e->freq, e->m_volt));
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dev_pm_opp_add(dev, e->freq, e->m_volt * 1000);
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}
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return 0;
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}
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int setup_opps(void)
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{
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struct device_node *np;
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struct platform_device *pdev;
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int err;
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np = of_find_node_by_name(NULL, "gpu");
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if (!np) {
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pr_err("Failed to find DT entry for Mali\n");
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return -EFAULT;
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}
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pdev = of_find_device_by_node(np);
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if (!pdev) {
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pr_err("Failed to find device for Mali\n");
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of_node_put(np);
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return -EFAULT;
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}
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err = init_juno_opps_from_scpi(&pdev->dev);
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of_node_put(np);
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return err;
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}
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int term_opps(struct device *dev)
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{
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struct scpi_dvfs_info *sinfo;
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struct scpi_ops *sops;
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int i;
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sops = get_scpi_ops();
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if (NULL == sops) {
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MALI_DEBUG_PRINT(2, ("Mali didn't get any scpi ops \n"));
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return -1;
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}
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/* Hard coded for Juno. 2 is GPU domain */
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sinfo = sops->dvfs_get_info(2);
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if (IS_ERR_OR_NULL(sinfo))
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return PTR_ERR(sinfo);
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for (i = 0; i < sinfo->count; i++) {
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struct scpi_opp *e = &sinfo->opps[i];
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MALI_DEBUG_PRINT(2, ("Mali Remove OPP: %u Hz \n", e->freq));
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dev_pm_opp_remove(dev, e->freq);
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}
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return 0;
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}
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#endif
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#endif
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#endif
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#endif
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