@@ -66,6 +66,7 @@ obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o voltage.o pm_bus.o
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
obj-$(CONFIG_OMAP_SMARTREFLEX) += sr_device.o smartreflex.o
obj-$(CONFIG_OMAP_SMARTREFLEX_CLASS3) += smartreflex-class3.o
+obj-$(CONFIG_OMAP_SMARTREFLEX_CLASS1P5) += smartreflex-class1p5.o
AFLAGS_sleep24xx.o :=-Wa,-march=armv6
AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a
new file mode 100644
@@ -0,0 +1,582 @@
+/*
+ * Smart reflex Class 1.5 specific implementations
+ *
+ * Copyright (C) 2010-2011 Texas Instruments, Inc.
+ * Nishanth Menon <nm@ti.com>
+ *
+ * Smart reflex class 1.5 is also called periodic SW Calibration
+ * Some of the highlights are as follows:
+ * – Host CPU triggers OPP calibration when transitioning to non calibrated
+ * OPP
+ * – SR-AVS + VP modules are used to perform calibration
+ * – Once completed, the SmartReflex-AVS module can be disabled
+ * – Enables savings based on process, supply DC accuracy and aging
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/uaccess.h>
+#include <linux/kobject.h>
+#include <linux/workqueue.h>
+#include <linux/opp.h>
+
+#include <plat/smartreflex.h>
+#include <plat/voltage.h>
+
+#define MAX_VDDS 3
+#define SR1P5_SAMPLING_DELAY_MS 1
+#define SR1P5_STABLE_SAMPLES 5
+#define SR1P5_MAX_TRIGGERS 5
+
+/*
+ * we expect events in 10uS, if we dont get 2wice times as much,
+ * we could kind of ignore this as a missed event.
+ */
+#define MAX_CHECK_VPTRANS_US 20
+
+/**
+ * struct sr_class1p5_work_data - data meant to be used by calibration work
+ * @work: calibration work
+ * @voltdm: voltage domain for which we are triggering
+ * @vdata: voltage data we are calibrating
+ * @num_calib_triggers: number of triggers from calibration loop
+ * @num_osc_samples: number of samples collected by isr
+ * @work_active: have we scheduled a work item?
+ */
+struct sr_class1p5_work_data {
+ struct delayed_work work;
+ struct voltagedomain *voltdm;
+ struct omap_volt_data *vdata;
+ u8 num_calib_triggers;
+ u8 num_osc_samples;
+ bool work_active;
+};
+
+#if CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY
+/* recal_work: recalibration calibration work */
+static struct delayed_work recal_work;
+#endif
+
+/**
+ * struct sr_class1p5_data - private data for class 1p5
+ * @work_data: work item data per voltage domain
+ */
+struct sr_class1p5_data {
+ struct sr_class1p5_work_data work_data[MAX_VDDS];
+};
+
+static void sr_class1p5_reset_calib(struct voltagedomain *voltdm, bool reset,
+ bool recal);
+
+/* our instance of class 1p5 private data */
+static struct sr_class1p5_data class_1p5_data;
+
+static struct sr_class1p5_work_data *get_sr1p5_work(struct voltagedomain
+ *voltdm)
+{
+ int idx;
+ for (idx = 0; idx < MAX_VDDS; idx++) {
+ if (class_1p5_data.work_data[idx].voltdm && !strcmp
+ (class_1p5_data.work_data[idx].voltdm->name, voltdm->name))
+ return &class_1p5_data.work_data[idx];
+ }
+ return ERR_PTR(-ENODATA);
+}
+
+/**
+ * sr_class1p5_notify() - isr notifier for status events
+ * @voltdm: voltage domain for which we were triggered
+ * @status: notifier event to use
+ *
+ * This basically collects data for the work to use.
+ */
+static int sr_class1p5_notify(struct voltagedomain *voltdm, u32 status)
+{
+ struct sr_class1p5_work_data *work_data;
+ int idx = 0;
+
+ if (IS_ERR_OR_NULL(voltdm)) {
+ pr_err("%s: bad parameters!\n", __func__);
+ return -EINVAL;
+ }
+
+ work_data = get_sr1p5_work(voltdm);
+ if (unlikely(!work_data)) {
+ pr_err("%s:%s no work data!!\n", __func__, voltdm->name);
+ return -EINVAL;
+ }
+
+ /* Wait for transdone so that we know the voltage to read */
+ do {
+ if (omap_vp_is_transdone(voltdm))
+ break;
+ idx++;
+ /* get some constant delay */
+ udelay(1);
+ } while (idx < MAX_CHECK_VPTRANS_US);
+
+ /*
+ * If we timeout, we still read the data,
+ * if we are oscillating+irq latencies are too high, we could
+ * have scenarios where we miss transdone event. since
+ * we waited long enough, it is still safe to read the voltage
+ * as we would have waited long enough - still flag it..
+ */
+ if (idx >= MAX_CHECK_VPTRANS_US)
+ pr_warning("%s: timed out waiting for transdone!!\n", __func__);
+
+ omap_vp_clear_transdone(voltdm);
+
+ idx = (work_data->num_osc_samples) % SR1P5_STABLE_SAMPLES;
+ work_data->num_osc_samples++;
+
+ return 0;
+}
+
+/**
+ * do_calibrate() - work which actually does the calibration
+ * @work: pointer to the work
+ *
+ * calibration routine uses the following logic:
+ * on the first trigger, we start the isr to collect sr voltages
+ * wait for stabilization delay (reschdule self instead of sleeping)
+ * after the delay, see if we collected any isr events
+ * if none, we have calibrated voltage.
+ * if there are any, we retry untill we giveup.
+ * on retry timeout, select a voltage to use as safe voltage.
+ */
+static void do_calibrate(struct work_struct *work)
+{
+ struct sr_class1p5_work_data *work_data =
+ container_of(work, struct sr_class1p5_work_data, work.work);
+ unsigned long u_volt_safe = 0, u_volt_current = 0;
+ struct omap_volt_data *volt_data;
+ struct voltagedomain *voltdm;
+
+ if (unlikely(!work_data)) {
+ pr_err("%s: ooops.. null work_data?\n", __func__);
+ return;
+ }
+
+ /*
+ * TODO:Handle the case where we might have just been scheduled AND
+ * 1.5 disable was called. check and HOLD dvfs
+ */
+
+ voltdm = work_data->voltdm;
+ /*
+ * In the unlikely case that we did get through when unplanned,
+ * flag and return.
+ */
+ if (unlikely(!work_data->work_active)) {
+ pr_err("%s:%s unplanned work invocation!\n", __func__,
+ voltdm->name);
+ /* TODO release the dvfs */
+ return;
+ }
+
+ work_data->num_calib_triggers++;
+ /* if we are triggered first time, we need to start isr to sample */
+ if (work_data->num_calib_triggers == 1)
+ goto start_sampling;
+
+ /* Stop isr from interrupting our measurements :) */
+ sr_notifier_control(voltdm, false);
+
+ volt_data = work_data->vdata;
+
+ /* if there are no samples captured.. SR is silent, aka stability! */
+ if (!work_data->num_osc_samples) {
+ u_volt_safe = omap_vp_get_curr_volt(voltdm);
+ u_volt_current = u_volt_safe;
+ goto done_calib;
+ }
+ if (work_data->num_calib_triggers == SR1P5_MAX_TRIGGERS) {
+ pr_warning("%s: %s recalib timeout!\n", __func__,
+ work_data->voltdm->name);
+ goto oscillating_calib;
+ }
+
+ /* we have potential oscillations/first sample */
+start_sampling:
+ work_data->num_osc_samples = 0;
+ /* Clear pending events */
+ sr_notifier_control(voltdm, false);
+ /* Clear all transdones */
+ while (omap_vp_is_transdone(voltdm))
+ omap_vp_clear_transdone(voltdm);
+ /* trigger sampling */
+ sr_notifier_control(voltdm, true);
+ schedule_delayed_work(&work_data->work,
+ msecs_to_jiffies(SR1P5_SAMPLING_DELAY_MS *
+ SR1P5_STABLE_SAMPLES));
+ /* TODO: release dvfs */
+ return;
+
+oscillating_calib:
+ /* Use the nominal voltage as the safe voltage */
+ u_volt_safe = volt_data->volt_nominal;
+ /* pick up current voltage to switch if needed */
+ u_volt_current = omap_vp_get_curr_volt(voltdm);
+
+ /* Fall through to close up common stuff */
+done_calib:
+ omap_vp_disable(voltdm);
+ sr_disable(voltdm);
+
+ volt_data->volt_calibrated = u_volt_safe;
+ /* Setup my dynamic voltage for the next calibration for this opp */
+ volt_data->volt_dynamic_nominal = omap_get_dyn_nominal(volt_data);
+
+ /*
+ * if the voltage we decided as safe is not the current voltage,
+ * switch
+ */
+ if (volt_data->volt_calibrated != u_volt_current) {
+ pr_debug("%s:%s reconfiguring to voltage %d\n",
+ __func__, voltdm->name, volt_data->volt_calibrated);
+ omap_voltage_scale_vdd(voltdm, volt_data);
+ }
+
+ /*
+ * TODO: Setup my wakeup voltage to allow immediate going to OFF and
+ * on - Pending twl and voltage layer cleanups.
+ * This is necessary, as this is not done as part of regular
+ * Dvfs flow.
+ * vc_setup_on_voltage(voltdm, volt_data->volt_calibrated);
+ */
+ work_data->work_active = false;
+ /* TODO: release dvfs */
+}
+
+#if CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY
+/**
+ * do_recalibrate() - work which actually does the calibration
+ * @work: pointer to the work
+ *
+ * on a periodic basis, we come and reset our calibration setup
+ * so that a recalibration of the OPPs take place. This takes
+ * care of aging factor in the system.
+ */
+static void do_recalibrate(struct work_struct *work)
+{
+ struct voltagedomain *voltdm;
+ int idx;
+ static struct sr_class1p5_work_data *work_data;
+
+ for (idx = 0; idx < MAX_VDDS; idx++) {
+ work_data = &class_1p5_data.work_data[idx];
+ voltdm = work_data->voltdm;
+ if (voltdm) {
+ /* if sr is not enabled, we check later */
+ if (!is_sr_enabled(voltdm))
+ continue;
+ /* TODO: Pause the dvfs transitions */
+ /* if sr is not enabled, we check later */
+
+ /* Reset and force a recalibration for current opp */
+ sr_class1p5_reset_calib(voltdm, true, true);
+
+ /* TODO: unpause DVFS transitions */
+ }
+ }
+ /* We come back again after time the usual delay */
+ schedule_delayed_work(&recal_work,
+ msecs_to_jiffies(CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY));
+}
+#endif /* CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY */
+
+/**
+ * sr_class1p5_enable() - class 1.5 mode of enable
+ * @voltdm: voltage domain to enable SR for
+ * @volt_data: voltdata to the voltage transition taking place
+ *
+ * when this gets called, we use the h/w loop to setup our voltages
+ * to an calibrated voltage, detect any oscillations, recover from the same
+ * and finally store the optimized voltage as the calibrated voltage in the
+ * system
+ */
+static int sr_class1p5_enable(struct voltagedomain *voltdm,
+ struct omap_volt_data *volt_data)
+{
+ int r;
+ struct sr_class1p5_work_data *work_data;
+
+ if (IS_ERR_OR_NULL(voltdm) || IS_ERR_OR_NULL(volt_data)) {
+ pr_err("%s: bad parameters!\n", __func__);
+ return -EINVAL;
+ }
+
+ /* if already calibrated, nothing to do here.. */
+ if (volt_data->volt_calibrated)
+ return 0;
+
+ work_data = get_sr1p5_work(voltdm);
+ if (unlikely(!work_data)) {
+ pr_err("%s: aieeee.. bad work data??\n", __func__);
+ return -EINVAL;
+ }
+
+ if (work_data->work_active)
+ return 0;
+
+ omap_vp_enable(voltdm);
+ r = sr_enable(voltdm, volt_data);
+ if (r) {
+ pr_err("%s: sr[%s] failed\n", __func__, voltdm->name);
+ omap_vp_disable(voltdm);
+ return r;
+ }
+ work_data->vdata = volt_data;
+ work_data->work_active = true;
+ work_data->num_calib_triggers = 0;
+ /* program the workqueue and leave it to calibrate offline.. */
+ schedule_delayed_work(&work_data->work,
+ msecs_to_jiffies(SR1P5_SAMPLING_DELAY_MS *
+ SR1P5_STABLE_SAMPLES));
+
+ return 0;
+}
+
+/**
+ * sr_class1p5_disable() - disable for class 1p5
+ * @voltdm: voltage domain for the sr which needs disabling
+ * @volt_data: voltagedata to disable
+ * @is_volt_reset: reset the voltage?
+ *
+ * we dont do anything if the class 1p5 is being used. this is because we
+ * already disable sr at the end of calibration and no h/w loop is actually
+ * active when this is called.
+ */
+static int sr_class1p5_disable(struct voltagedomain *voltdm,
+ struct omap_volt_data *volt_data,
+ int is_volt_reset)
+{
+ struct sr_class1p5_work_data *work_data;
+
+ if (IS_ERR_OR_NULL(voltdm) || IS_ERR_OR_NULL(volt_data)) {
+ pr_err("%s: bad parameters!\n", __func__);
+ return -EINVAL;
+ }
+
+ work_data = get_sr1p5_work(voltdm);
+ if (work_data->work_active) {
+ /* if volt reset and work is active, we dont allow this */
+ if (is_volt_reset)
+ return -EBUSY;
+ /* flag work is dead and remove the old work */
+ work_data->work_active = false;
+ cancel_delayed_work_sync(&work_data->work);
+ sr_notifier_control(voltdm, false);
+ omap_vp_disable(voltdm);
+ sr_disable(voltdm);
+ }
+
+ /* if already calibrated, nothin special to do here.. */
+ if (volt_data->volt_calibrated)
+ return 0;
+
+ if (is_volt_reset)
+ omap_voltage_reset(voltdm);
+ return 0;
+}
+
+/**
+ * sr_class1p5_configure() - configuration function
+ * @voldm: configure for which voltage domain
+ *
+ * we dont do much here other than setup some registers for
+ * the sr module involved.
+ */
+static int sr_class1p5_configure(struct voltagedomain *voltdm)
+{
+ if (IS_ERR_OR_NULL(voltdm)) {
+ pr_err("%s: bad parameters!\n", __func__);
+ return -EINVAL;
+ }
+
+ return sr_configure_errgen(voltdm);
+}
+
+/**
+ * sr_class1p5_reset_calib() - reset all calibrated voltages
+ * @srid: srid to reset the calibration for
+ * @reset: reset voltage before we recal?
+ * @recal: should I recalibrate my current opp?
+ *
+ * if we call this, it means either periodic calibration trigger was
+ * fired(either from sysfs or other mechanisms) or we have disabled class 1p5,
+ * meaning we cant trust the calib voltages anymore, it is better to use
+ * nominal in the system
+ */
+static void sr_class1p5_reset_calib(struct voltagedomain *voltdm, bool reset,
+ bool recal)
+{
+ struct sr_class1p5_work_data *work_data;
+
+ /* I dont need to go further if sr is not present */
+ if (!is_sr_enabled(voltdm))
+ return;
+
+ work_data = get_sr1p5_work(voltdm);
+
+ if (work_data->work_active)
+ sr_class1p5_disable(voltdm, work_data->vdata, 0);
+
+ omap_voltage_calib_reset(voltdm);
+
+ /*
+ * I should now reset the voltages to my nominal to be safe
+ */
+ if (reset)
+ omap_voltage_reset(voltdm);
+
+ /*
+ * I should fire a recalibration for current opp if needed
+ * Note: i have just reset my calibrated voltages, and if
+ * i call sr_enable equivalent, I will cause a recalibration
+ * loop, even though the function is called sr_enable.. we
+ * are in class 1.5 ;)
+ */
+ if (reset && recal)
+ sr_class1p5_enable(voltdm, work_data->vdata);
+}
+
+/**
+ * sr_class1p5_cinit() - class 1p5 init
+ * @voltdm: sr voltage domain
+ * @class_priv_data: private data for the class
+ *
+ * we do class specific initialization like creating sysfs/debugfs entries
+ * needed, spawning of a kthread if needed etc.
+ */
+static int sr_class1p5_cinit(struct voltagedomain *voltdm,
+ void *class_priv_data)
+{
+ struct sr_class1p5_work_data *work_data;
+ int idx;
+
+ if (IS_ERR_OR_NULL(voltdm) || IS_ERR_OR_NULL(class_priv_data)) {
+ pr_err("%s: bad parameters!\n", __func__);
+ return -EINVAL;
+ }
+
+ /* setup our work params */
+ work_data = get_sr1p5_work(voltdm);
+ if (!IS_ERR_OR_NULL(work_data)) {
+ pr_err("%s: ooopps.. class already initialized for %s! bug??\n",
+ __func__, voltdm->name);
+ return -EINVAL;
+ }
+ work_data = NULL;
+ /* get the next spare work_data */
+ for (idx = 0; idx < MAX_VDDS; idx++) {
+ if (!class_1p5_data.work_data[idx].voltdm) {
+ work_data = &class_1p5_data.work_data[idx];
+ break;
+ }
+ }
+ if (!work_data) {
+ pr_err("%s: no more space for work data for domains!\n",
+ __func__);
+ return -ENOMEM;
+ }
+ work_data->voltdm = voltdm;
+ INIT_DELAYED_WORK_DEFERRABLE(&work_data->work, do_calibrate);
+ return 0;
+}
+
+/**
+ * sr_class1p5_cdeinit() - class 1p5 deinitialization
+ * @voltdm: voltage domain for which to do this.
+ * @class_priv_data: class private data for deinitialiation
+ *
+ * currently only resets the calibrated voltage forcing dvfs voltages
+ * to be used in the system
+ */
+static int sr_class1p5_cdeinit(struct voltagedomain *voltdm,
+ void *class_priv_data)
+{
+ struct sr_class1p5_work_data *work_data;
+
+ if (IS_ERR_OR_NULL(voltdm) || IS_ERR_OR_NULL(class_priv_data)) {
+ pr_err("%s: bad parameters!\n", __func__);
+ return -EINVAL;
+ }
+
+ /* setup our work params */
+ work_data = get_sr1p5_work(voltdm);
+ if (IS_ERR_OR_NULL(work_data)) {
+ pr_err("%s: ooopps.. class not initialized for %s! bug??\n",
+ __func__, voltdm->name);
+ return -EINVAL;
+ }
+
+ /*
+ * we dont have SR periodic calib anymore.. so reset calibs
+ * we are already protected by sr debugfs lock, so no lock needed
+ * here.
+ */
+ sr_class1p5_reset_calib(voltdm, true, false);
+
+ /* reset all data for this work data */
+ memset(work_data, 0, sizeof(*work_data));
+
+ return 0;
+}
+
+/* SR class1p5 structure */
+static struct omap_sr_class_data class1p5_data = {
+ .enable = sr_class1p5_enable,
+ .disable = sr_class1p5_disable,
+ .configure = sr_class1p5_configure,
+ .class_type = SR_CLASS1P5,
+ .class_init = sr_class1p5_cinit,
+ .class_deinit = sr_class1p5_cdeinit,
+ .notify = sr_class1p5_notify,
+ /*
+ * trigger for bound - this tells VP that SR has a voltage
+ * change. we should ensure transdone is set before reading
+ * vp voltage.
+ */
+ .notify_flags = SR_NOTIFY_MCUBOUND,
+ .class_priv_data = (void *)&class_1p5_data,
+};
+
+/**
+ * sr_class1p5_init() - register class 1p5 as default
+ *
+ * board files call this function to use class 1p5, we register with the
+ * smartreflex subsystem
+ */
+static int __init sr_class1p5_init(void)
+{
+ int r;
+
+ /* Enable this class only for OMAP3630 and OMAP4 */
+ if (!(cpu_is_omap3630() || cpu_is_omap44xx()))
+ return -EINVAL;
+
+ r = sr_register_class(&class1p5_data);
+ if (r) {
+ pr_err("SmartReflex class 1.5 driver: "
+ "failed to register with %d\n", r);
+ } else {
+#if CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY
+ INIT_DELAYED_WORK_DEFERRABLE(&recal_work, do_recalibrate);
+ schedule_delayed_work(&recal_work, msecs_to_jiffies(
+ CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY));
+#endif
+ pr_info("SmartReflex class 1.5 driver: initialized (%dms)\n",
+ CONFIG_OMAP_SR_CLASS1P5_RECALIBRATION_DELAY);
+ }
+ return r;
+}
+late_initcall(sr_class1p5_init);
@@ -21,7 +21,9 @@ static int sr_class3_enable(struct voltagedomain *voltdm,
return sr_enable(voltdm, volt_data);
}
-static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
+static int sr_class3_disable(struct voltagedomain *voltdm,
+ struct omap_volt_data *vdata,
+ int is_volt_reset)
{
omap_vp_disable(voltdm);
sr_disable(voltdm);
@@ -317,7 +317,9 @@ static void sr_stop_vddautocomp(struct omap_sr *sr)
}
if (sr->autocomp_active) {
- sr_class->disable(sr->voltdm, 1);
+ sr_class->disable(sr->voltdm,
+ omap_voltage_get_nom_volt(sr->voltdm),
+ 1);
if (sr_class->class_deinit &&
sr_class->class_deinit(sr->voltdm,
sr_class->class_priv_data)) {
@@ -471,6 +473,28 @@ static u32 sr_retrieve_nvalue(struct omap_sr *sr, u32 efuse_offs)
/* Public Functions */
/**
+ * is_sr_enabled() - is Smart reflex enabled for this domain?
+ * @voltdm: voltage domain to check
+ *
+ * Returns 0 if SR is enabled for this domain, else returns err
+ */
+bool is_sr_enabled(struct voltagedomain *voltdm)
+{
+ struct omap_sr *sr;
+ if (IS_ERR_OR_NULL(voltdm)) {
+ pr_warning("%s: invalid param voltdm\n", __func__);
+ return false;
+ }
+ sr = _sr_lookup(voltdm);
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return false;
+ }
+ return sr->autocomp_active;
+}
+
+/**
* sr_configure_errgen() - Configures the smrtreflex to perform AVS using the
* error generator module.
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
@@ -839,6 +863,7 @@ void omap_sr_enable(struct voltagedomain *voltdm,
* omap_sr_disable() - API to disable SR without resetting the voltage
* processor voltage
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ * @volt_data: Voltage data to go to
*
* This API is to be called from the kernel in order to disable
* a particular smartreflex module. This API will in turn call
@@ -846,7 +871,8 @@ void omap_sr_enable(struct voltagedomain *voltdm,
* the smartreflex class disable not to reset the VP voltage after
* disabling smartreflex.
*/
-void omap_sr_disable(struct voltagedomain *voltdm)
+void omap_sr_disable(struct voltagedomain *voltdm,
+ struct omap_volt_data *vdata)
{
struct omap_sr *sr = _sr_lookup(voltdm);
@@ -865,7 +891,7 @@ void omap_sr_disable(struct voltagedomain *voltdm)
return;
}
- sr_class->disable(voltdm, 0);
+ sr_class->disable(voltdm, vdata, 0);
}
/**
@@ -898,7 +924,7 @@ void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
return;
}
- sr_class->disable(voltdm, 1);
+ sr_class->disable(voltdm, omap_voltage_get_nom_volt(voltdm), 1);
}
/**
@@ -379,9 +379,55 @@ static int nom_volt_debug_get(void *data, u64 *val)
return 0;
}
+static int dyn_volt_debug_get(void *data, u64 *val)
+{
+ struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
+ struct omap_volt_data *volt_data;
+
+ if (!vdd) {
+ pr_warning("Wrong paramater passed\n");
+ return -EINVAL;
+ }
+
+ volt_data = omap_voltage_get_nom_volt(&vdd->voltdm);
+ if (IS_ERR_OR_NULL(volt_data)) {
+ pr_warning("%s: No voltage/domain?\n", __func__);
+ return -ENODEV;
+ }
+
+ *val = volt_data->volt_dynamic_nominal;
+
+ return 0;
+}
+
+static int calib_volt_debug_get(void *data, u64 *val)
+{
+ struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
+ struct omap_volt_data *volt_data;
+
+ if (!vdd) {
+ pr_warning("Wrong paramater passed\n");
+ return -EINVAL;
+ }
+
+ volt_data = omap_voltage_get_nom_volt(&vdd->voltdm);
+ if (IS_ERR_OR_NULL(volt_data)) {
+ pr_warning("%s: No voltage/domain?\n", __func__);
+ return -ENODEV;
+ }
+
+ *val = volt_data->volt_calibrated;
+
+ return 0;
+}
+
DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL,
"%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(dyn_volt_debug_fops, dyn_volt_debug_get, NULL,
+ "%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(calib_volt_debug_fops, calib_volt_debug_get, NULL,
+ "%llu\n");
static void vp_latch_vsel(struct omap_vdd_info *vdd)
{
u32 vpconfig;
@@ -509,6 +555,12 @@ static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
(void) debugfs_create_file("curr_nominal_volt", S_IRUGO,
vdd->debug_dir, (void *) vdd,
&nom_volt_debug_fops);
+ (void) debugfs_create_file("curr_dyn_nominal_volt", S_IRUGO,
+ vdd->debug_dir, (void *) vdd,
+ &dyn_volt_debug_fops);
+ (void) debugfs_create_file("curr_calibrated_volt", S_IRUGO,
+ vdd->debug_dir, (void *) vdd,
+ &calib_volt_debug_fops);
}
/* Voltage scale and accessory APIs */
@@ -1137,6 +1189,33 @@ struct omap_volt_data *omap_voltage_get_nom_volt(struct voltagedomain *voltdm)
}
/**
+ * omap_voltage_calib_reset() - reset the calibrated voltage entries
+ * @voltdm: voltage domain to reset the entries for
+ *
+ * when the calibrated entries are no longer valid, this api allows
+ * the calibrated voltages to be reset.
+ */
+int omap_voltage_calib_reset(struct voltagedomain *voltdm)
+{
+ struct omap_vdd_info *vdd;
+ struct omap_volt_data *volt_data;
+
+ if (IS_ERR_OR_NULL(voltdm)) {
+ pr_warning("%s: VDD specified does not exist!\n", __func__);
+ return -EINVAL;
+ }
+
+ vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
+ volt_data = vdd->volt_data;
+ /* reset the calibrated voltages as 0 */
+ while (volt_data->volt_nominal) {
+ volt_data->volt_calibrated = 0;
+ volt_data++;
+ }
+ return 0;
+}
+
+/**
* omap_vp_get_curr_volt() - API to get the current vp voltage.
* @voltdm: pointer to the VDD.
*
@@ -67,6 +67,23 @@ config OMAP_SMARTREFLEX_CLASS3
Class 3 implementation of Smartreflex employs continuous hardware
voltage calibration.
+config OMAP_SMARTREFLEX_CLASS1P5
+ bool "Class 1.5 mode of Smartreflex Implementation"
+ depends on OMAP_SMARTREFLEX && TWL4030_CORE
+ help
+ Say Y to enable Class 1.5 implementation of Smartreflex
+ Class 1.5 implementation of Smartreflex employs software controlled
+ hardware voltage calibration.
+
+config OMAP_SR_CLASS1P5_RECALIBRATION_DELAY
+ int "Class 1.5 mode recalibration recalibration delay(ms)"
+ depends on OMAP_SMARTREFLEX_CLASS1P5
+ default 86400000
+ help
+ Setup the recalibration delay in milliseconds. Use 0 for never doing
+ a recalibration. Defaults to recommended recalibration every 24hrs.
+ If you do not understand this, use the default.
+
config OMAP_RESET_CLOCKS
bool "Reset unused clocks during boot"
depends on ARCH_OMAP
@@ -167,6 +167,7 @@ struct omap_sr_pmic_data {
#define SR_CLASS1 0x1
#define SR_CLASS2 0x2
#define SR_CLASS3 0x3
+#define SR_CLASS1P5 0x4
/**
* struct omap_sr_class_data - Smartreflex class driver info
@@ -187,7 +188,9 @@ struct omap_sr_pmic_data {
struct omap_sr_class_data {
int (*enable)(struct voltagedomain *voltdm,
struct omap_volt_data *volt_data);
- int (*disable)(struct voltagedomain *voltdm, int is_volt_reset);
+ int (*disable)(struct voltagedomain *voltdm,
+ struct omap_volt_data *volt_data,
+ int is_volt_reset);
int (*class_init)(struct voltagedomain *voltdm, void *class_priv_data);
int (*class_deinit)(struct voltagedomain *voltdm,
void *class_priv_data);
@@ -235,7 +238,8 @@ struct omap_sr_data {
/* Smartreflex module enable/disable interface */
void omap_sr_enable(struct voltagedomain *voltdm,
struct omap_volt_data *volt_data);
-void omap_sr_disable(struct voltagedomain *voltdm);
+void omap_sr_disable(struct voltagedomain *voltdm,
+ struct omap_volt_data *volt_data);
void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
/* API to register the pmic specific data with the smartreflex driver. */
@@ -250,6 +254,7 @@ int sr_configure_minmax(struct voltagedomain *voltdm);
/* API to register the smartreflex class driver with the smartreflex driver */
int sr_register_class(struct omap_sr_class_data *class_data);
+bool is_sr_enabled(struct voltagedomain *voltdm);
#else
static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
@@ -264,5 +269,9 @@ static inline void omap_sr_disable_reset_volt(
struct voltagedomain *voltdm) {}
static inline void omap_sr_register_pmic(
struct omap_sr_pmic_data *pmic_data) {}
+static inline bool is_sr_enabled(struct voltagedomain *voltdm)
+{
+ return false;
+}
#endif
#endif
@@ -58,6 +58,8 @@
#define OMAP4430_VDD_CORE_OPP50_UV 930000
#define OMAP4430_VDD_CORE_OPP100_UV 1100000
+#define OMAP3PLUS_DYNAMIC_NOMINAL_MARGIN_UV 50000
+
/**
* struct voltagedomain - omap voltage domain global structure.
* @name: Name of the voltage domain which can be used as a unique
@@ -81,6 +83,8 @@ struct voltagedomain {
*/
struct omap_volt_data {
u32 volt_nominal;
+ u32 volt_calibrated;
+ u32 volt_dynamic_nominal;
u32 sr_efuse_offs;
u8 sr_errminlimit;
u8 vp_errgain;
@@ -127,6 +131,7 @@ struct omap_volt_data *omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
bool omap_vp_is_transdone(struct voltagedomain *voltdm);
bool omap_vp_clear_transdone(struct voltagedomain *voltdm);
struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
+int omap_voltage_calib_reset(struct voltagedomain *voltdm);
#ifdef CONFIG_PM
int omap_voltage_register_pmic(struct voltagedomain *voltdm,
struct omap_volt_pmic_info *pmic_info);
@@ -160,7 +165,23 @@ static inline unsigned long omap_get_operation_voltage(
{
if (IS_ERR_OR_NULL(vdata))
return 0;
- return vdata->volt_nominal;
+ return (vdata->volt_calibrated) ? vdata->volt_calibrated :
+ (vdata->volt_dynamic_nominal) ? vdata->volt_dynamic_nominal :
+ vdata->volt_nominal;
}
+/* what is my dynamic nominal? */
+static inline unsigned long omap_get_dyn_nominal(struct omap_volt_data *vdata)
+{
+ if (IS_ERR_OR_NULL(vdata))
+ return 0;
+ if (vdata->volt_calibrated) {
+ unsigned long v = vdata->volt_calibrated +
+ OMAP3PLUS_DYNAMIC_NOMINAL_MARGIN_UV;
+ if (v > vdata->volt_nominal)
+ return vdata->volt_nominal;
+ return v;
+ }
+ return vdata->volt_nominal;
+}
#endif