diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap_device.h | 9 | ||||
| -rw-r--r-- | arch/arm/plat-omap/omap_device.c | 49 |
2 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h index e4c349ff9fd..204fb0a9b2f 100644 --- a/arch/arm/plat-omap/include/plat/omap_device.h +++ b/arch/arm/plat-omap/include/plat/omap_device.h @@ -50,6 +50,8 @@ extern struct device omap_device_parent; * @hwmods: (one .. many per omap_device) * @hwmods_cnt: ARRAY_SIZE() of @hwmods * @pm_lats: ptr to an omap_device_pm_latency table + * @set_rate: fn ptr to change the operating rate. + * @get_rate: fn ptr to retrieve the current operating rate. * @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats * @pm_lat_level: array index of the last odpl entry executed - -1 if never * @dev_wakeup_lat: dev wakeup latency in nanoseconds @@ -73,6 +75,8 @@ struct omap_device { s8 pm_lat_level; u8 hwmods_cnt; u8 _state; + int (*set_rate)(struct device *dev, unsigned long rate); + unsigned long (*get_rate) (struct device *dev); }; /* Device driver interface (call via platform_data fn ptrs) */ @@ -107,6 +111,11 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od); int omap_device_align_pm_lat(struct platform_device *pdev, u32 new_wakeup_lat_limit); struct powerdomain *omap_device_get_pwrdm(struct omap_device *od); +int omap_device_set_rate(struct device *dev, unsigned long freq); +unsigned long omap_device_get_rate(struct device *dev); +void omap_device_register_dvfs_callbacks(struct device *dev, + int (*set_rate)(struct device *dev, unsigned long rate), + unsigned long (*get_rate) (struct device *dev)); u32 omap_device_get_context_loss_count(struct platform_device *pdev); /* Other */ diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index a84e8494d76..4cee430c40d 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c @@ -810,6 +810,55 @@ int omap_device_enable_clocks(struct omap_device *od) return 0; } +int omap_device_set_rate(struct device *dev, unsigned long freq) +{ + struct platform_device *pdev; + struct omap_device *od; + + pdev = container_of(dev, struct platform_device, dev); + od = _find_by_pdev(pdev); + + if (!od->set_rate) { + dev_err(dev, "%s: No set_rate API for scaling device\n", + __func__); + return -ENODATA; + } + + return od->set_rate(dev, freq); +} + +unsigned long omap_device_get_rate(struct device *dev) +{ + struct platform_device *pdev; + struct omap_device *od; + + pdev = container_of(dev, struct platform_device, dev); + od = _find_by_pdev(pdev); + + + if (!od->get_rate) { + dev_err(dev, "%s: No get rate API for the device\n", + __func__); + return 0; + } + + return od->get_rate(dev); +} + +void omap_device_register_dvfs_callbacks(struct device *dev, + int (*set_rate)(struct device *dev, unsigned long rate), + unsigned long (*get_rate) (struct device *dev)) +{ + struct platform_device *pdev; + struct omap_device *od; + + pdev = container_of(dev, struct platform_device, dev); + od = _find_by_pdev(pdev); + + od->set_rate = set_rate; + od->get_rate = get_rate; +} + struct device omap_device_parent = { .init_name = "omap", .parent = &platform_bus, |