diff options
Diffstat (limited to 'driver/product/kernel/drivers/gpu/arm/midgard/platform/juno_soc/juno_mali_opp.c')
-rwxr-xr-x | driver/product/kernel/drivers/gpu/arm/midgard/platform/juno_soc/juno_mali_opp.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/driver/product/kernel/drivers/gpu/arm/midgard/platform/juno_soc/juno_mali_opp.c b/driver/product/kernel/drivers/gpu/arm/midgard/platform/juno_soc/juno_mali_opp.c new file mode 100755 index 0000000..ccfd8cc --- /dev/null +++ b/driver/product/kernel/drivers/gpu/arm/midgard/platform/juno_soc/juno_mali_opp.c @@ -0,0 +1,84 @@ +/* + * + * (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"); |