@@ -184,6 +184,9 @@ config OMAP_PM_NONE
config OMAP_PM_NOOP
bool "No-op/debug PM layer"
+config OMAP_PM
+ depends on PM
+ bool "OMAP PM layer implementation"
endchoice
endmenu
@@ -38,3 +38,4 @@ obj-y += $(i2c-omap-m) $(i2c-omap-y)
obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox.o
obj-$(CONFIG_OMAP_PM_NOOP) += omap-pm-noop.o
+obj-$(CONFIG_OMAP_PM) += omap-pm.o
@@ -114,7 +114,8 @@ static inline int omap1_i2c_add_bus(int bus_id)
*/
static void omap_pm_set_max_mpu_wakeup_lat_compat(struct device *dev, long t)
{
- omap_pm_set_max_mpu_wakeup_lat(dev, t);
+ static struct pm_qos_request_list *qos_handle;
+ omap_pm_set_max_mpu_wakeup_lat(&qos_handle, t);
}
static struct omap_device_pm_latency omap_i2c_latency[] = {
@@ -20,6 +20,7 @@
#include "powerdomain.h"
#include <plat/opp.h>
+#include <linux/pm_qos_params.h>
/*
* agent_id values for use with omap_pm_set_min_bus_tput():
@@ -75,7 +76,8 @@ void omap_pm_if_exit(void);
/**
* omap_pm_set_max_mpu_wakeup_lat - set the maximum MPU wakeup latency
- * @dev: struct device * requesting the constraint
+ * @qos_request: handle for the constraint. The pointer should be
+ * initialized to NULL
* @t: maximum MPU wakeup latency in microseconds
*
* Request that the maximum interrupt latency for the MPU to be no
@@ -107,7 +109,8 @@ void omap_pm_if_exit(void);
* Returns -EINVAL for an invalid argument, -ERANGE if the constraint
* is not satisfiable, or 0 upon success.
*/
-int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t);
+int omap_pm_set_max_mpu_wakeup_lat(struct pm_qos_request_list **qos_request,
+ long t);
/**
@@ -174,7 +177,8 @@ int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
/**
* omap_pm_set_max_sdma_lat - set the maximum system DMA transfer start latency
- * @dev: struct device *
+ * @qos_request: handle for the constraint. The pointer should be
+ * initialized to NULL
* @t: maximum DMA transfer start latency in microseconds
*
* Request that the maximum system DMA transfer start latency for this
@@ -199,7 +203,8 @@ int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
* 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);
+int omap_pm_set_max_sdma_lat(struct pm_qos_request_list **qos_request,
+ long t);
/**
@@ -30,19 +30,19 @@
* Device-driver-originated constraints (via board-*.c files)
*/
-int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t)
+int omap_pm_set_max_mpu_wakeup_lat(struct pm_qos_request_list **pmqos_req,
+ long t)
{
- if (!dev || t < -1) {
+ if (!pmqos_req || t < -1) {
WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
return -EINVAL;
};
if (t == -1)
- pr_debug("OMAP PM: remove max MPU wakeup latency constraint: "
- "dev %s\n", dev_name(dev));
+ pr_debug("OMAP PM: remove max MPU wakeup latency constraint\n");
else
pr_debug("OMAP PM: add max MPU wakeup latency constraint: "
- "dev %s, t = %ld usec\n", dev_name(dev), t);
+ "t = %ld usec\n", t);
/*
* For current Linux, this needs to map the MPU to a
@@ -116,19 +116,19 @@ int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
return 0;
}
-int omap_pm_set_max_sdma_lat(struct device *dev, long t)
+int omap_pm_set_max_sdma_lat(struct pm_qos_request_list **qos_request,
+ long t)
{
- if (!dev || t < -1) {
+ if (!qos_request || t < -1) {
WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
return -EINVAL;
};
if (t == -1)
- pr_debug("OMAP PM: remove max DMA latency constraint: "
- "dev %s\n", dev_name(dev));
+ pr_debug("OMAP PM: remove max DMA latency constraint:\n");
else
pr_debug("OMAP PM: add max DMA latency constraint: "
- "dev %s, t = %ld usec\n", dev_name(dev), t);
+ "t = %ld usec\n", t);
/*
* For current Linux PM QOS params, this code should scan the
new file mode 100755
@@ -0,0 +1,316 @@
+/*
+ * omap-pm.c - OMAP power management interface
+ *
+ * Copyright (C) 2008-2010 Texas Instruments, Inc.
+ * Copyright (C) 2008-2009 Nokia Corporation
+ * Vishwanath BS
+ *
+ * This code is based on plat-omap/omap-pm-noop.c.
+ *
+ * Interface developed by (in alphabetical order):
+ * Karthik Dasu, Tony Lindgren, Rajendra Nayak, Sakari Poussa, Veeramanikandan
+ * Raju, Anand Sawant, Igor Stoppa, Paul Walmsley, Richard Woodruff
+ */
+
+#undef DEBUG
+
+#include <linux/init.h>
+#include <linux/cpufreq.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+/* Interface documentation is in mach/omap-pm.h */
+#include <plat/omap-pm.h>
+
+#include <plat/powerdomain.h>
+
+/*
+ * Device-driver-originated constraints (via board-*.c files)
+ */
+
+int omap_pm_set_max_mpu_wakeup_lat(struct pm_qos_request_list
+ **qos_request, long t)
+{
+ if (!qos_request || t < -1) {
+ pr_warning("OMAP PM: %s: invalid parameter(s)\n", __func__);
+ return -EINVAL;
+ };
+
+ if (t == -1) {
+ pm_qos_remove_request(*qos_request);
+ kfree(*qos_request);
+ *qos_request = NULL;
+ } else if (*qos_request == NULL) {
+ *qos_request = kzalloc(sizeof(struct pm_qos_request_list),
+ GFP_KERNEL);
+ if (!*qos_request) {
+ pr_warning("OMAP PM: %s: kzalloc failed\n", __func__);
+ return -ENOMEM;
+ }
+ pm_qos_add_request(*qos_request, PM_QOS_CPU_DMA_LATENCY, t);
+ } else
+ pm_qos_update_request(*qos_request, t);
+
+ return 0;
+}
+
+int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r)
+{
+ if (!dev || (agent_id != OCP_INITIATOR_AGENT &&
+ agent_id != OCP_TARGET_AGENT)) {
+ WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+ return -EINVAL;
+ };
+
+ if (r == 0)
+ pr_debug("OMAP PM: remove min bus tput constraint: "
+ "dev %s for agent_id %d\n", dev_name(dev), agent_id);
+ else
+ pr_debug("OMAP PM: add min bus tput constraint: "
+ "dev %s for agent_id %d: rate %ld KiB\n",
+ dev_name(dev), agent_id, r);
+
+ /*
+ * This code should model the interconnect and compute the
+ * required clock frequency, convert that to a VDD2 OPP ID, then
+ * set the VDD2 OPP appropriately.
+ *
+ * TI CDP code can call constraint_set here on the VDD2 OPP.
+ */
+
+ return 0;
+}
+
+int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
+ long t)
+{
+ if (!req_dev || !dev || t < -1) {
+ WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+ return -EINVAL;
+ };
+
+ if (t == -1)
+ pr_debug("OMAP PM: remove max device latency constraint: "
+ "dev %s\n", dev_name(dev));
+ else
+ pr_debug("OMAP PM: add max device latency constraint: "
+ "dev %s, t = %ld usec\n", dev_name(dev), t);
+
+ /*
+ * For current Linux, this needs to map the device to a
+ * powerdomain, then go through the list of current max lat
+ * constraints on that powerdomain and find the smallest. If
+ * the latency constraint has changed, the code should
+ * recompute the state to enter for the next powerdomain
+ * state. Conceivably, this code should also determine
+ * whether to actually disable the device clocks or not,
+ * depending on how long it takes to re-enable the clocks.
+ *
+ * TI CDP code can call constraint_set here.
+ */
+
+ return 0;
+}
+
+int omap_pm_set_max_sdma_lat(struct pm_qos_request_list **qos_request, long t)
+{
+ if (!qos_request || t < -1) {
+ pr_warning("OMAP PM: %s: invalid parameter(s)\n", __func__);
+ return -EINVAL;
+ };
+
+ if (t == -1) {
+ pm_qos_remove_request(*qos_request);
+ kfree(*qos_request);
+ *qos_request = NULL;
+ } else if (*qos_request == NULL) {
+ *qos_request = kzalloc(sizeof(struct pm_qos_request_list),
+ GFP_KERNEL);
+ if (!*qos_request) {
+ pr_warning("OMAP PM: %s: kzalloc failed\n", __func__);
+ return -ENOMEM;
+ }
+ pm_qos_add_request(*qos_request, PM_QOS_CPU_DMA_LATENCY, t);
+ } else
+ pm_qos_update_request(*qos_request, t);
+
+ return 0;
+}
+
+int omap_pm_set_min_clk_rate(struct device *dev, struct clk *c, long r)
+{
+ if (!dev || !c || r < 0) {
+ WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
+ return -EINVAL;
+ }
+
+ if (r == 0)
+ pr_debug("OMAP PM: remove min clk rate constraint: "
+ "dev %s\n", dev_name(dev));
+ else
+ pr_debug("OMAP PM: add min clk rate constraint: "
+ "dev %s, rate = %ld Hz\n", dev_name(dev), r);
+
+ /*
+ * Code in a real implementation should keep track of these
+ * constraints on the clock, and determine the highest minimum
+ * clock rate. It should iterate over each OPP and determine
+ * whether the OPP will result in a clock rate that would
+ * satisfy this constraint (and any other PM constraint in effect
+ * at that time). Once it finds the lowest-voltage OPP that
+ * meets those conditions, it should switch to it, or return
+ * an error if the code is not capable of doing so.
+ */
+
+ return 0;
+}
+
+/*
+ * DSP Bridge-specific constraints
+ */
+
+const struct omap_opp *omap_pm_dsp_get_opp_table(void)
+{
+ pr_debug("OMAP PM: DSP request for OPP table\n");
+
+ /*
+ * Return DSP frequency table here: The final item in the
+ * array should have .rate = .opp_id = 0.
+ */
+
+ return NULL;
+}
+
+void omap_pm_dsp_set_min_opp(u8 opp_id)
+{
+ if (opp_id == 0) {
+ WARN_ON(1);
+ return;
+ }
+
+ pr_debug("OMAP PM: DSP requests minimum VDD1 OPP to be %d\n", opp_id);
+
+ /*
+ *
+ * For l-o dev tree, our VDD1 clk is keyed on OPP ID, so we
+ * can just test to see which is higher, the CPU's desired OPP
+ * ID or the DSP's desired OPP ID, and use whichever is
+ * highest.
+ *
+ * In CDP12.14+, the VDD1 OPP custom clock that controls the DSP
+ * rate is keyed on MPU speed, not the OPP ID. So we need to
+ * map the OPP ID to the MPU speed for use with clk_set_rate()
+ * if it is higher than the current OPP clock rate.
+ *
+ */
+}
+
+
+u8 omap_pm_dsp_get_opp(void)
+{
+ pr_debug("OMAP PM: DSP requests current DSP OPP ID\n");
+
+ /*
+ * For l-o dev tree, call clk_get_rate() on VDD1 OPP clock
+ *
+ * CDP12.14+:
+ * Call clk_get_rate() on the OPP custom clock, map that to an
+ * OPP ID using the tables defined in board-*.c/chip-*.c files.
+ */
+
+ return 0;
+}
+
+/*
+ * CPUFreq-originated constraint
+ *
+ * In the future, this should be handled by custom OPP clocktype
+ * functions.
+ */
+
+struct cpufreq_frequency_table **omap_pm_cpu_get_freq_table(void)
+{
+ pr_debug("OMAP PM: CPUFreq request for frequency table\n");
+
+ /*
+ * Return CPUFreq frequency table here: loop over
+ * all VDD1 clkrates, pull out the mpu_ck frequencies, build
+ * table
+ */
+
+ return NULL;
+}
+
+void omap_pm_cpu_set_freq(unsigned long f)
+{
+ if (f == 0) {
+ WARN_ON(1);
+ return;
+ }
+
+ pr_debug("OMAP PM: CPUFreq requests CPU frequency to be set to %lu\n",
+ f);
+
+ /*
+ * For l-o dev tree, determine whether MPU freq or DSP OPP id
+ * freq is higher. Find the OPP ID corresponding to the
+ * higher frequency. Call clk_round_rate() and clk_set_rate()
+ * on the OPP custom clock.
+ *
+ * CDP should just be able to set the VDD1 OPP clock rate here.
+ */
+}
+
+unsigned long omap_pm_cpu_get_freq(void)
+{
+ pr_debug("OMAP PM: CPUFreq requests current CPU frequency\n");
+
+ /*
+ * Call clk_get_rate() on the mpu_ck.
+ */
+
+ return 0;
+}
+
+/*
+ * Device context loss tracking
+ */
+
+int omap_pm_get_dev_context_loss_count(struct device *dev)
+{
+ if (!dev) {
+ WARN_ON(1);
+ return -EINVAL;
+ };
+
+ pr_debug("OMAP PM: returning context loss count for dev %s\n",
+ dev_name(dev));
+
+ /*
+ * Map the device to the powerdomain. Return the powerdomain
+ * off counter.
+ */
+
+ return 0;
+}
+
+
+/* Should be called before clk framework init */
+int __init omap_pm_if_early_init(void)
+
+{
+ return 0;
+}
+
+/* Must be called after clock framework is initialized */
+int __init omap_pm_if_init(void)
+{
+ return 0;
+}
+
+void omap_pm_if_exit(void)
+{
+ /* Deallocate CPUFreq frequency table here */
+}
+
+