| /* |
| * |
| * (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"); |