diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap-pm.h')
| -rw-r--r-- | arch/arm/mach-omap2/omap-pm.h | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/arch/arm/mach-omap2/omap-pm.h b/arch/arm/mach-omap2/omap-pm.h index 1d777e63e05c..109bef5538eb 100644 --- a/arch/arm/mach-omap2/omap-pm.h +++ b/arch/arm/mach-omap2/omap-pm.h @@ -50,14 +50,6 @@ int __init omap_pm_if_early_init(void); */ int __init omap_pm_if_init(void); -/** - * omap_pm_if_exit - OMAP PM exit code - * - * Exit code; currently unused. The "_if_" is to avoid name - * collisions with the PM idle-loop code. - */ -void omap_pm_if_exit(void); - /* * Device-driver-originated constraints (via board-*.c files, platform_data) */ @@ -132,163 +124,6 @@ int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t); int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r); -/** - * omap_pm_set_max_dev_wakeup_lat - set the maximum device enable latency - * @req_dev: struct device * requesting the constraint, or NULL if none - * @dev: struct device * to set the constraint one - * @t: maximum device wakeup latency in microseconds - * - * Request that the maximum amount of time necessary for a device @dev - * to become accessible after its clocks are enabled should be no - * greater than @t microseconds. Specifically, this represents the - * time from when a device driver enables device clocks with - * clk_enable(), to when the register reads and writes on the device - * will succeed. This function should be called before clk_disable() - * is called, since the power state transition decision may be made - * during clk_disable(). - * - * It is intended that underlying PM code will use this information to - * determine what power state to put the powerdomain enclosing this - * device into. - * - * Multiple calls to omap_pm_set_max_dev_wakeup_lat() will replace the - * previous wakeup latency values for this device. To remove the - * wakeup latency restriction for this device, call with t = -1. - * - * Returns -EINVAL for an invalid argument, -ERANGE if the constraint - * is not satisfiable, or 0 upon success. - */ -int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev, - long t); - - -/** - * omap_pm_set_max_sdma_lat - set the maximum system DMA transfer start latency - * @dev: struct device * - * @t: maximum DMA transfer start latency in microseconds - * - * Request that the maximum system DMA transfer start latency for this - * device 'dev' should be no greater than 't' microseconds. "DMA - * transfer start latency" here is defined as the elapsed time from - * when a device (e.g., McBSP) requests that a system DMA transfer - * start or continue, to the time at which data starts to flow into - * that device from the system DMA controller. - * - * It is intended that underlying PM code will use this information to - * determine what power state to put the CORE powerdomain into. - * - * Since system DMA transfers may not involve the MPU, this function - * will not affect MPU wakeup latency. Use set_max_cpu_lat() to do - * so. Similarly, this function will not affect device wakeup latency - * -- use set_max_dev_wakeup_lat() to affect that. - * - * Multiple calls to set_max_sdma_lat() will replace the previous t - * value for this device. To remove the maximum DMA latency for this - * device, call with t = -1. - * - * Returns -EINVAL for an invalid argument, -ERANGE if the constraint - * is not satisfiable, or 0 upon success. - */ -int omap_pm_set_max_sdma_lat(struct device *dev, long t); - - -/** - * omap_pm_set_min_clk_rate - set minimum clock rate requested by @dev - * @dev: struct device * requesting the constraint - * @clk: struct clk * to set the minimum rate constraint on - * @r: minimum rate in Hz - * - * Request that the minimum clock rate on the device @dev's clk @clk - * be no less than @r Hz. - * - * It is expected that the OMAP PM code will use this information to - * find an OPP or clock setting that will satisfy this clock rate - * constraint, along with any other applicable system constraints on - * the clock rate or corresponding voltage, etc. - * - * omap_pm_set_min_clk_rate() differs from the clock code's - * clk_set_rate() in that it considers other constraints before taking - * any hardware action, and may change a system OPP rather than just a - * clock rate. clk_set_rate() is intended to be a low-level - * interface. - * - * omap_pm_set_min_clk_rate() is easily open to abuse. A better API - * would be something like "omap_pm_set_min_dev_performance()"; - * however, there is no easily-generalizable concept of performance - * that applies to all devices. Only a device (and possibly the - * device subsystem) has both the subsystem-specific knowledge, and - * the hardware IP block-specific knowledge, to translate a constraint - * on "touchscreen sampling accuracy" or "number of pixels or polygons - * rendered per second" to a clock rate. This translation can be - * dependent on the hardware IP block's revision, or firmware version, - * and the driver is the only code on the system that has this - * information and can know how to translate that into a clock rate. - * - * The intended use-case for this function is for userspace or other - * kernel code to communicate a particular performance requirement to - * a subsystem; then for the subsystem to communicate that requirement - * to something that is meaningful to the device driver; then for the - * device driver to convert that requirement to a clock rate, and to - * then call omap_pm_set_min_clk_rate(). - * - * Users of this function (such as device drivers) should not simply - * call this function with some high clock rate to ensure "high - * performance." Rather, the device driver should take a performance - * constraint from its subsystem, such as "render at least X polygons - * per second," and use some formula or table to convert that into a - * clock rate constraint given the hardware type and hardware - * revision. Device drivers or subsystems should not assume that they - * know how to make a power/performance tradeoff - some device use - * cases may tolerate a lower-fidelity device function for lower power - * consumption; others may demand a higher-fidelity device function, - * no matter what the power consumption. - * - * Multiple calls to omap_pm_set_min_clk_rate() will replace the - * previous rate value for the device @dev. To remove the minimum clock - * rate constraint for the device, call with r = 0. - * - * Returns -EINVAL for an invalid argument, -ERANGE if the constraint - * is not satisfiable, or 0 upon success. - */ -int omap_pm_set_min_clk_rate(struct device *dev, struct clk *c, long r); - -/* - * DSP Bridge-specific constraints - */ - -/** - * omap_pm_dsp_get_opp_table - get OPP->DSP clock frequency table - * - * Intended for use by DSPBridge. Returns an array of OPP->DSP clock - * frequency entries. The final item in the array should have .rate = - * .opp_id = 0. - */ -const struct omap_opp *omap_pm_dsp_get_opp_table(void); - -/** - * omap_pm_dsp_set_min_opp - receive desired OPP target ID from DSP Bridge - * @opp_id: target DSP OPP ID - * - * Set a minimum OPP ID for the DSP. This is intended to be called - * only from the DSP Bridge MPU-side driver. Unfortunately, the only - * information that code receives from the DSP/BIOS load estimator is the - * target OPP ID; hence, this interface. No return value. - */ -void omap_pm_dsp_set_min_opp(u8 opp_id); - -/** - * omap_pm_dsp_get_opp - report the current DSP OPP ID - * - * Report the current OPP for the DSP. Since on OMAP3, the DSP and - * MPU share a single voltage domain, the OPP ID returned back may - * represent a higher DSP speed than the OPP requested via - * omap_pm_dsp_set_min_opp(). - * - * Returns the current VDD1 OPP ID, or 0 upon error. - */ -u8 omap_pm_dsp_get_opp(void); - - /* * CPUFreq-originated constraint * @@ -296,33 +131,6 @@ u8 omap_pm_dsp_get_opp(void); * functions. */ -/** - * omap_pm_cpu_get_freq_table - return a cpufreq_frequency_table array ptr - * - * Provide a frequency table usable by CPUFreq for the current chip/board. - * Returns a pointer to a struct cpufreq_frequency_table array or NULL - * upon error. - */ -struct cpufreq_frequency_table **omap_pm_cpu_get_freq_table(void); - -/** - * omap_pm_cpu_set_freq - set the current minimum MPU frequency - * @f: MPU frequency in Hz - * - * Set the current minimum CPU frequency. The actual CPU frequency - * used could end up higher if the DSP requested a higher OPP. - * Intended to be called by plat-omap/cpu_omap.c:omap_target(). No - * return value. - */ -void omap_pm_cpu_set_freq(unsigned long f); - -/** - * omap_pm_cpu_get_freq - report the current CPU frequency - * - * Returns the current MPU frequency, or 0 upon error. - */ -unsigned long omap_pm_cpu_get_freq(void); - /* * Device context loss tracking |