diff options
Diffstat (limited to 'gxp-pm.h')
| -rw-r--r-- | gxp-pm.h | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -7,6 +7,10 @@ #ifndef __GXP_PM_H__ #define __GXP_PM_H__ +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/workqueue.h> #include <soc/google/bcl.h> #include <soc/google/exynos_pm_qos.h> @@ -155,6 +159,10 @@ struct gxp_power_manager { u64 blk_switch_count; /* PMU AUR_STATUS base address for block status, maybe NULL */ void __iomem *aur_status; + /* Protects @busy_count. */ + spinlock_t busy_lock; + /* The number of ongoing requests to the firmware. */ + u64 busy_count; }; /** @@ -341,6 +349,20 @@ void gxp_pm_resume_clkmux(struct gxp_dev *gxp); void gxp_pm_set_thermal_limit(struct gxp_dev *gxp, unsigned long thermal_limit); /** + * gxp_pm_busy() - Claim there is a request to the firmware. + * @gxp: The GXP device + * + * This function is used in pair with gxp_pm_idle(). + * When there is no ongoing requests, we can put the device in a lower frequency to save power. + */ +void gxp_pm_busy(struct gxp_dev *gxp); +/** + * gxp_pm_idle() - Reverts gxp_pm_busy(). + * @gxp: The GXP device + */ +void gxp_pm_idle(struct gxp_dev *gxp); + +/** * gxp_pm_chip_set_ops() - Set the operations to the power manager, i.e. * @mgr->ops. * @mgr: The power manager to be set operations to |