From: Jean Pihet <j-pihet@xxxxxx>
Implement OMAP PM layer omap_pm_set_max_dev_wakeup_lat API by
creating similar APIs at the omap_device and omap_hwmod levels. The
omap_hwmod level call is the layer with access to the powerdomain
core, so it is the place where the powerdomain is queried to set and
release the constraints.
NOTE: only works for devices which have been converted to use
omap_device/omap_hwmod.
Longer term, we could possibly remove this API from the OMAP PM layer,
and instead directly use the omap_device level API.
Based on Vibhore's original patch , adapted to omap_device and
omap_hwmod frameworks.
Signed-off-by: Jean Pihet <j-pihet@xxxxxx>
Cc: Vibhore Vardhan <vvardhan@xxxxxx>
---
arch/arm/mach-omap2/omap_hwmod.c | 62 +++++++++-
arch/arm/mach-omap2/powerdomain.c | 176 ++++++++++++++++++++++++-
arch/arm/mach-omap2/powerdomain.h | 31 +++++
arch/arm/mach-omap2/powerdomains3xxx_data.c | 60 +++++++++
arch/arm/plat-omap/include/plat/omap_device.h | 2 +
arch/arm/plat-omap/include/plat/omap_hwmod.h | 2 +
arch/arm/plat-omap/omap-pm-constraints.c | 101 ++++++---------
arch/arm/plat-omap/omap_device.c | 28 ++++
8 files changed, 399 insertions(+), 63 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index e282e35..0dc096f 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -142,6 +142,7 @@
#include "powerdomain.h"
#include <plat/clock.h>
#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
#include <plat/prcm.h>
#include "cm2xxx_3xxx.h"
@@ -2198,10 +2199,69 @@ ohsps_unlock:
}
/**
+ * omap_hwmod_set_max_dev_wakeup_lat - set a device wake-up constraint
+ * @oh: struct omap_hwmod *
+ * @req_oh: struct omap_hwmod *
+ * @t: wakeup latency constraint (us). -1 removes the existing constraint
+ *
+ * Query the powerdomain of @oh to set/release the wake-up constraint
+ *
+ * Returns -EINVAL if @oh or @req_oh have no power domain, or the return
+ * code from the pwrdm function (pwrdm_wakeuplat_set/release_constraint)
+ * of the powerdomain assocated with @oh.
+ */
+int omap_hwmod_set_max_dev_wakeup_lat(struct omap_hwmod *req_oh,
+ struct omap_hwmod *oh, long t)
+{
+ struct device *req_dev;
+ struct platform_device *pdev;
+ struct powerdomain *pwrdm;
+ int ret = 0;
+
+ pwrdm = omap_hwmod_get_pwrdm(oh);
+
+ /* Catch devices with undefined powerdomains */
+ if (!pwrdm) {
+ pr_err("omap_hwmod: Error: could not find parent "
+ "powerdomain for %s\n", oh->name);
+ return -EINVAL;
+ }
+
+ pdev = &(req_oh->od->pdev);
+ if (pdev == NULL) {
+ pr_err("omap_hwmod: Error: pdev not found for oh %s\n",
+ oh->name);
+ return -EINVAL;
+ }
+
+ req_dev = &(pdev->dev);
+ if (req_dev == NULL) {
+ pr_err("omap_hwmod: Error: device not found for oh %s\n",
+ oh->name);
+ return -EINVAL;
+ }
+
+ /* Call set/release_constraint for the given pwrdm */
+ if (t == -1) {
+ pr_debug("omap_hwmod: remove max device latency constraint: "
+ "oh %s, pwrdm %s, req by oh %s\n",
+ oh->name, pwrdm->name, req_oh->name);
+ ret = pwrdm_wakeuplat_release_constraint(pwrdm, req_dev);
+ } else {
+ pr_debug("omap_hwmod: add max device latency constraint: "
+ "oh %s, t = %ld usec, pwrdm %s, req by oh %s\n",
+ oh->name, t, pwrdm->name, req_oh->name);
+ ret = pwrdm_wakeuplat_set_constraint(pwrdm, req_dev, t);
+ }
+
+ return 0;
+}
+
+/**
* omap_hwmod_get_context_loss_count - get lost context count
* @oh: struct omap_hwmod *
*
- * Query the powerdomain of of @oh to get the context loss
+ * Query the powerdomain of @oh to get the context loss
* count for this device.
*
* Returns the context loss count of the powerdomain assocated with @oh
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index eaed0df..3ed3bea 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -19,16 +19,19 @@
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/string.h>
+#include <linux/slab.h>
+
+#include <plat/cpu.h>
+#include <plat/prcm.h>
+
#include "cm2xxx_3xxx.h"
#include "prcm44xx.h"
#include "cm44xx.h"
#include "prm2xxx_3xxx.h"
#include "prm44xx.h"
-#include <plat/cpu.h>
#include "powerdomain.h"
#include "clockdomain.h"
-#include <plat/prcm.h>
#include "pm.h"
@@ -103,6 +106,13 @@ static int _pwrdm_register(struct powerdomain *pwrdm)
pwrdm->state = pwrdm_read_pwrst(pwrdm);
pwrdm->state_counter[pwrdm->state] = 1;
+ /* Initialize priority ordered list for wakeup latency constraint */
+ spin_lock_init(&pwrdm->wakeuplat_lock);
+ plist_head_init(&pwrdm->wakeuplat_dev_list, &pwrdm->wakeuplat_lock);
+
+ /* res_mutex protects res_list add and del ops */
+ mutex_init(&pwrdm->wakeuplat_mutex);
+
pr_debug("powerdomain: registered %s\n", pwrdm->name);
return 0;
@@ -176,6 +186,62 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused)
return 0;
}
+/**
+ * pwrdm_wakeuplat_update_pwrst - Update power domain power state if needed
+ * @pwrdm: struct powerdomain * to which requesting device belongs to
+ *
+ * Finds minimum latency value from all entries in the list and
+ * the power domain power state needing the constraint. Programs
+ * new state if it is different from current power state.
+ */
+static void pwrdm_wakeuplat_update_pwrst(struct powerdomain *pwrdm)
+{
+ struct plist_node *node;
+ int new_state;
+ unsigned long min_latency = -1;
+
+ if (!plist_head_empty(&pwrdm->wakeuplat_dev_list)) {
+ node = plist_last(&pwrdm->wakeuplat_dev_list);
+ min_latency = node->prio;
+ }
+
+ /* Find power state with wakeup latency < minimum constraint. */
+ for (new_state = 0x0; new_state < PWRDM_MAX_PWRSTS; new_state++) {
+ if (min_latency == -1 ||
+ pwrdm->wakeup_lat[new_state] <= min_latency)
+ break;
+ }
+
+ switch (new_state) {
+ case PWRDM_FUNC_PWRST_OFF:
+ new_state = PWRDM_POWER_OFF;
+ break;
+ case PWRDM_FUNC_PWRST_OSWR:
+ pwrdm_set_logic_retst(pwrdm, PWRDM_POWER_OFF);
+ case PWRDM_FUNC_PWRST_CSWR:
+ new_state = PWRDM_POWER_RET;
+ break;
+ case PWRDM_FUNC_PWRST_ON:
+ new_state = PWRDM_POWER_ON;
+ break;
+ default:
+ pr_warn("powerdomain: requested latency constraint not "
+ "supported %s set to ON state\n", pwrdm->name);
+ new_state = PWRDM_POWER_ON;
+ break;
+ }
+
+ if (pwrdm_read_pwrst(pwrdm) != new_state) {
+ if (cpu_is_omap34xx())
+ omap_set_pwrdm_state(pwrdm, new_state);
+ }
+
+ pr_debug("powerdomain: %s pwrst: curr= %d, prev= %d next= %d "
+ "wkuplat_min= %lu, set_state= %d\n", pwrdm->name,
+ pwrdm_read_pwrst(pwrdm), pwrdm_read_prev_pwrst(pwrdm),
+ pwrdm_read_next_pwrst(pwrdm), min_latency, new_state);
+}
+
/* Public functions */
/**
@@ -911,6 +977,112 @@ int pwrdm_post_transition(void)
}
/**
+ * pwrdm_wakeuplat_set_constraint - Set powerdomain wakeup latency constraint
+ * @pwrdm: struct powerdomain * to which requesting device belongs to
+ * @dev: struct device * of requesting device
+ * @t: wakeup latency constraint in microseconds
+ *
+ * Adds new entry to powerdomain's wakeup latency constraint list.
+ * If the requesting device already exists in the list, old value is
+ * overwritten. Checks whether current power state is still adequate.
+ * Returns -EINVAL if the powerdomain or device pointer is NULL,
+ * or -ENOMEM if kmalloc fails, or returns 0 upon success.
+ */
+int pwrdm_wakeuplat_set_constraint(struct powerdomain *pwrdm,
+ struct device *req_dev, unsigned long t)
+{
+ struct wakeuplat_dev_list *user;
+ int found = 0, ret = 0;
+
+ if (!pwrdm || !req_dev) {
+ WARN(1, "powerdomain: %s: invalid parameter(s)", __func__);
+ return -EINVAL;
+ }
+
+ mutex_lock(&pwrdm->wakeuplat_mutex);
+
+ plist_for_each_entry(user, &pwrdm->wakeuplat_dev_list, node) {
+ if (user->dev == req_dev) {
+ found = 1;
+ break;
+ }
+ }
+
+ /* Add new entry to the list or update existing request */
+ if (found && user->constraint_us == t) {
+ goto exit_set;
+ } else if (!found) {
+ user = kzalloc(sizeof(struct wakeuplat_dev_list), GFP_KERNEL);
+ if (!user) {
+ pr_err("powerdomain: FATAL ERROR: kzalloc failed\n");
+ ret = -ENOMEM;
+ goto exit_set;
+ }
+ user->dev = req_dev;
+ } else {
+ plist_del(&user->node, &pwrdm->wakeuplat_dev_list);
+ }
+
+ plist_node_init(&user->node, t);
+ plist_add(&user->node, &pwrdm->wakeuplat_dev_list);
+ user->node.prio = user->constraint_us = t;
+
+ pwrdm_wakeuplat_update_pwrst(pwrdm);
+
+exit_set:
+ mutex_unlock(&pwrdm->wakeuplat_mutex);
+
+ return ret;
+}
+
+/**
+ * pwrdm_wakeuplat_release_constraint - Release powerdomain wkuplat constraint
+ * @pwrdm: struct powerdomain * to which requesting device belongs to
+ * @req_dev: struct device * of requesting device
+ *
+ * Removes device's entry from powerdomain's wakeup latency constraint list.
+ * Checks whether current power state is still adequate.
+ * Returns -EINVAL if the powerdomain or device pointer is NULL or
+ * no such entry exists in the list, or returns 0 upon success.
+ */
+int pwrdm_wakeuplat_release_constraint(struct powerdomain *pwrdm,
+ struct device *req_dev)
+{
+ struct wakeuplat_dev_list *user;
+ int found = 0, ret = 0;
+
+ if (!pwrdm || !req_dev) {
+ WARN(1, "powerdomain: %s: invalid parameter(s)", __func__);
+ return -EINVAL;
+ }
+
+ mutex_lock(&pwrdm->wakeuplat_mutex);
+
+ plist_for_each_entry(user, &pwrdm->wakeuplat_dev_list, node) {
+ if (user->dev == req_dev) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ pr_err("OMAP PM: Error: no prior constraint to release\n");
+ ret = -EINVAL;
+ goto exit_rls;
+ }
+
+ plist_del(&user->node, &pwrdm->wakeuplat_dev_list);
+ kfree(user);
+
+ pwrdm_wakeuplat_update_pwrst(pwrdm);
+
+exit_rls:
+ mutex_unlock(&pwrdm->wakeuplat_mutex);
+
+ return ret;
+}
+
+/**
* pwrdm_get_context_loss_count - get powerdomain's context loss count
* @pwrdm: struct powerdomain * to wait for
*
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h
index c66431e..d4189d8 100644
--- a/arch/arm/mach-omap2/powerdomain.h
+++ b/arch/arm/mach-omap2/powerdomain.h
@@ -19,6 +19,9 @@
#include <linux/types.h>
#include <linux/list.h>
+#include <linux/plist.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
#include <linux/atomic.h>
@@ -46,6 +49,15 @@
#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
+/* Powerdomain functional power states */
+#define PWRDM_FUNC_PWRST_OFF 0x0
+#define PWRDM_FUNC_PWRST_OSWR 0x1
+#define PWRDM_FUNC_PWRST_CSWR 0x2
+#define PWRDM_FUNC_PWRST_ON 0x3
+
+#define PWRDM_MAX_FUNC_PWRSTS 4
+
+#define UNSUP_STATE -1
/* Powerdomain flags */
#define PWRDM_HAS_HDWR_SAR (1 << 0) /* hardware save-and-restore support */
@@ -96,6 +108,10 @@ struct powerdomain;
* @state_counter:
* @timer:
* @state_timer:
+ * @wakeup_lat: Wakeup latencies for possible powerdomain power states
+ * @wakeuplat_lock: spinlock for plist
+ * @wakeuplat_dev_list: plist_head linking all devices placing constraint
+ * @wakeuplat_mutex: mutex to protect per powerdomain list ops
*
* @prcm_partition possible values are defined in mach-omap2/prcm44xx.h.
*/
@@ -121,6 +137,16 @@ struct powerdomain {
s64 timer;
s64 state_timer[PWRDM_MAX_PWRSTS];
#endif
+ const u32 wakeup_lat[PWRDM_MAX_FUNC_PWRSTS];
+ spinlock_t wakeuplat_lock;
+ struct plist_head wakeuplat_dev_list;
+ struct mutex wakeuplat_mutex;
+};
+
+struct wakeuplat_dev_list {
+ struct device *dev;
+ unsigned long constraint_us;
+ struct plist_node node;
};
/**
@@ -211,6 +237,11 @@ int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);
int pwrdm_pre_transition(void);
int pwrdm_post_transition(void);
int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm);
+
+int pwrdm_wakeuplat_set_constraint(struct powerdomain *pwrdm,
+ struct device *dev, unsigned long t);
+int pwrdm_wakeuplat_release_constraint(struct powerdomain *pwrdm,
+ struct device *dev);
u32 pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
extern void omap2xxx_powerdomains_init(void);
diff --git a/arch/arm/mach-omap2/powerdomains3xxx_data.c b/arch/arm/mach-omap2/powerdomains3xxx_data.c
index e1bec56..4f7e44d 100644
--- a/arch/arm/mach-omap2/powerdomains3xxx_data.c
+++ b/arch/arm/mach-omap2/powerdomains3xxx_data.c
@@ -52,6 +52,12 @@ static struct powerdomain iva2_pwrdm = {
[2] = PWRSTS_OFF_ON,
[3] = PWRDM_POWER_ON,
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 1100,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 350,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain mpu_3xxx_pwrdm = {
@@ -68,6 +74,12 @@ static struct powerdomain mpu_3xxx_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRSTS_OFF_ON,
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 95,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 45,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
/*
@@ -98,6 +110,12 @@ static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
[0] = PWRSTS_OFF_RET_ON, /* MEM1ONSTATE */
[1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 100,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 60,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain core_3xxx_es3_1_pwrdm = {
@@ -121,6 +139,12 @@ static struct powerdomain core_3xxx_es3_1_pwrdm = {
[0] = PWRSTS_OFF_RET_ON, /* MEM1ONSTATE */
[1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 100,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 60,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain dss_pwrdm = {
@@ -136,6 +160,12 @@ static struct powerdomain dss_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRDM_POWER_ON, /* MEMONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 70,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 20,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
/*
@@ -157,6 +187,12 @@ static struct powerdomain sgx_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRDM_POWER_ON, /* MEMONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 1000,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain cam_pwrdm = {
@@ -172,6 +208,12 @@ static struct powerdomain cam_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRDM_POWER_ON, /* MEMONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 850,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 35,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain per_pwrdm = {
@@ -187,6 +229,12 @@ static struct powerdomain per_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRDM_POWER_ON, /* MEMONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 200,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 110,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain emu_pwrdm = {
@@ -201,6 +249,12 @@ static struct powerdomain neon_pwrdm = {
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
.pwrsts = PWRSTS_OFF_RET_ON,
.pwrsts_logic_ret = PWRDM_POWER_RET,
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 200,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 35,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain usbhost_pwrdm = {
@@ -223,6 +277,12 @@ static struct powerdomain usbhost_pwrdm = {
.pwrsts_mem_on = {
[0] = PWRDM_POWER_ON, /* MEMONSTATE */
},
+ .wakeup_lat = {
+ [PWRDM_FUNC_PWRST_OFF] = 800,
+ [PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
+ [PWRDM_FUNC_PWRST_CSWR] = 150,
+ [PWRDM_FUNC_PWRST_ON] = 0,
+ },
};
static struct powerdomain dpll1_pwrdm = {
diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index e4c349f..5da6b47 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
@@ -107,6 +107,8 @@ 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_max_dev_wakeup_lat(struct platform_device *req_pdev,
+ struct platform_device *pdev, long t);
u32 omap_device_get_context_loss_count(struct platform_device *pdev);
/* Other */
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 1eee85a..0fbb974 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -587,6 +587,8 @@ int omap_hwmod_for_each_by_class(const char *classname,
void *user);
int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state);
+int omap_hwmod_set_max_dev_wakeup_lat(struct omap_hwmod *req_oh,
+ struct omap_hwmod *oh, long t);
u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh);
/*
diff --git a/arch/arm/plat-omap/omap-pm-constraints.c b/arch/arm/plat-omap/omap-pm-constraints.c
index c8b4e4c..7ae855f 100644
--- a/arch/arm/plat-omap/omap-pm-constraints.c
+++ b/arch/arm/plat-omap/omap-pm-constraints.c
@@ -24,6 +24,7 @@
/* Interface documentation is in mach/omap-pm.h */
#include <plat/omap-pm.h>
#include <plat/omap_device.h>
+#include <plat/common.h>
static bool off_mode_enabled;
static u32 dummy_context_loss_counter;
@@ -32,34 +33,6 @@ static u32 dummy_context_loss_counter;
* Device-driver-originated constraints (via board-*.c files)
*/
-int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t)
-{
- if (!dev || 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));
- else
- pr_debug("OMAP PM: add max MPU wakeup latency constraint: "
- "dev %s, t = %ld usec\n", dev_name(dev), t);
-
- /*
- * For current Linux, this needs to map the MPU to a
- * powerdomain, then go through the list of current max lat
- * constraints on the MPU and find the smallest. If
- * the latency constraint has changed, the code should
- * recompute the state to enter for the next powerdomain
- * state.
- *
- * TI CDP code can call constraint_set here.
- */
-
- 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 &&
@@ -87,62 +60,70 @@ int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r)
return 0;
}
+/*
+ * omap_pm_set_max_dev_wakeup_lat - set/release devices wake-up latency
+ * constraints
+ */
int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
long t)
{
+ struct platform_device *pdev, *req_pdev;
+ int ret = 0;
+
if (!req_dev || !dev || t < -1) {
WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
return -EINVAL;
+ }
+
+ /* Look for the platform devices */
+ pdev = container_of(dev, struct platform_device, dev);
+ req_pdev = container_of(req_dev, struct platform_device, dev);
+
+ /* Try to catch non platform devices. */
+ if ((pdev->name == NULL) || (req_pdev->name == NULL)) {
+ pr_err("OMAP-PM set_wakeup_lat: Error: platform devices "
+ "not valid\n");
+ return -EINVAL;
+ } else {
+ /* Call the omap_device API */
+ ret = omap_device_set_max_dev_wakeup_lat(req_pdev, pdev, t);
+ }
+
+ return ret;
+}
+
+int omap_pm_set_max_mpu_wakeup_lat(struct device *req_dev, long t)
+{
+ if (!req_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));
+ pr_debug("OMAP PM: remove max MPU wakeup latency constraint: "
+ "dev %s\n", dev_name(req_dev));
else
- pr_debug("OMAP PM: add max device latency constraint: "
- "dev %s, t = %ld usec\n", dev_name(dev), t);
+ pr_debug("OMAP PM: add max MPU wakeup latency constraint: "
+ "dev %s, t = %ld usec\n", dev_name(req_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.
- */
+ omap_pm_set_max_dev_wakeup_lat(req_dev, omap2_get_mpuss_device(), t);
return 0;
}
-int omap_pm_set_max_sdma_lat(struct device *dev, long t)
+int omap_pm_set_max_sdma_lat(struct device *req_dev, long t)
{
- if (!dev || t < -1) {
+ if (!req_dev || 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));
+ "dev %s\n", dev_name(req_dev));
else
pr_debug("OMAP PM: add max DMA latency constraint: "
- "dev %s, t = %ld usec\n", dev_name(dev), t);
-
- /*
- * For current Linux PM QOS params, this code should scan the
- * list of maximum CPU and DMA latencies and select the
- * smallest, then set cpu_dma_latency pm_qos_param
- * accordingly.
- *
- * For future Linux PM QOS params, with separate CPU and DMA
- * latency params, this code should just set the dma_latency param.
- *
- * TI CDP code can call constraint_set here.
- */
+ "dev %s, t = %ld usec\n", dev_name(req_dev), t);
return 0;
}
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 57adb27..1fe93d3 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -280,6 +280,34 @@ static void _add_optional_clock_alias(struct omap_device *od,
/* Public functions for use by core code */
/**
+ * omap_device_set_max_dev_wakeup_lat - set/release a device constraint
+ * @od: struct omap_device *
+ * @req_od: struct omap_device *
+ *
+ * Using the primary hwmod, set/release a device constraint for the pdev
+ * device, requested by the req_pdev device.
+ *
+ * If any hwmods exist for the omap_device assoiated with @pdev and @req_pdev,
+ * set/release the constraint for the corresponding hwmods, otherwise return
+ * -EINVAL.
+ */
+int omap_device_set_max_dev_wakeup_lat(struct platform_device *req_pdev,
+ struct platform_device *pdev, long t)
+{
+ struct omap_device *od, *req_od;
+ u32 ret = -EINVAL;
+
+ od = _find_by_pdev(pdev);
+ req_od = _find_by_pdev(req_pdev);
+
+ if ((od->hwmods_cnt) && (req_od->hwmods_cnt))
+ ret = omap_hwmod_set_max_dev_wakeup_lat(req_od->hwmods[0],
+ od->hwmods[0], t);
+
+ return ret;
+}
+
+/**
* omap_device_get_context_loss_count - get lost context count
* @od: struct omap_device *
*
--
1.7.2.3
--
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