Add API to enable IO pad wakeup capability based on mux dynamic pad and
wake_up enable flag available from hwmod_mux initialization.
Use the wakeup_enable flag and enable wakeup capability
for the given pads. Wakeup capability will be enabled/disabled
during hmwod idle transition based on whether wakeup_flag is
set or cleared.
Signed-off-by: Govindraj.R <govindraj.raja@xxxxxx>
---
arch/arm/mach-omap2/omap_hwmod.c | 51 +++++++++++++++++++++++++
arch/arm/plat-omap/include/plat/omap_device.h | 2 +
arch/arm/plat-omap/include/plat/omap_hwmod.h | 3 +
arch/arm/plat-omap/omap_device.c | 50 ++++++++++++++++++++++++
4 files changed, 106 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index e034294..bbbe1ed 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -2369,3 +2369,54 @@ int omap_hwmod_no_setup_reset(struct omap_hwmod *oh)
return 0;
}
+
+static int omap_hwmod_configure_ioring_wakeup(struct omap_hwmod *oh, u16 val)
+{
+ struct omap_device_pad *pad;
+ int ret = -EINVAL, j;
+
+ if (oh->mux->enabled) {
+ for (j = 0; j < oh->mux->nr_pads_dynamic; j++) {
+ pad = oh->mux->pads_dynamic[j];
+ if (pad->flags & OMAP_DEVICE_PAD_WAKEUP) {
+ pad->idle = pad->enable | val;
+ ret = 0;
+ }
+ }
+ }
+
+ return ret;
+}
+
+/**
+ * omap_hwmod_enable_ioring_wakeup - Set wakeup flag for iopad.
+ * @oh: struct omap_hwmod *
+ *
+ * Traverse through dynamic pads, if pad is enabled then
+ * set wakeup enable bit flag for the mux pin. Wakeup pad bit
+ * will be set during hwmod idle transistion.
+ * Return error if pads are not enabled or not available.
+ */
+int omap_hwmod_enable_ioring_wakeup(struct omap_hwmod *oh)
+{
+ /* Enable pad wake-up capability */
+ return omap_hwmod_configure_ioring_wakeup(oh, OMAP_WAKEUP_EN);
+}
+
+/**
+ * omap_hwmod_disable_ioring_wakeup - Clear wakeup flag for iopad.
+ * @oh: struct omap_hwmod *
+ *
+ * Traverse through dynamic pads, if pad is enabled then
+ * clear wakeup enable bit flag for the mux pin. Wakeup pad bit
+ * will be set during hwmod idle transistion.
+ * Return error if pads are not enabled or not available.
+ */
+int omap_hwmod_disable_ioring_wakeup(struct omap_hwmod *oh)
+{
+ u16 val = 0;
+
+ /* Disable pad wakeup capability */
+ val &= ~OMAP_WAKEUP_EN;
+ return omap_hwmod_configure_ioring_wakeup(oh, val);
+}
diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index e4c349f..a377dd0 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
@@ -117,6 +117,8 @@ int omap_device_enable_hwmods(struct omap_device *od);
int omap_device_disable_clocks(struct omap_device *od);
int omap_device_enable_clocks(struct omap_device *od);
+int omap_device_enable_ioring_wakeup(struct platform_device *pdev);
+int omap_device_disable_ioring_wakeup(struct platform_device *pdev);
/*
* Entries should be kept in latency order ascending
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 1adea9c..7ef11a6 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -602,6 +602,9 @@ u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh);
int omap_hwmod_no_setup_reset(struct omap_hwmod *oh);
+int omap_hwmod_enable_ioring_wakeup(struct omap_hwmod *oh);
+int omap_hwmod_disable_ioring_wakeup(struct omap_hwmod *oh);
+
/*
* Chip variant-specific hwmod init routines - XXX should be converted
* to use initcalls once the initial boot ordering is straightened out
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 9bbda9a..04a4f15 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
@@ -742,6 +742,56 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od)
return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
}
+/**
+ * omap_device_enable_ioring_wakeup - Set wakeup bit for iopad ring.
+ * @pdev: platform_device for which wakeup needs to be set.
+ *
+ * Caller should ensure this is called if device_may_wakeup(dev) is true
+ * traverse through each hwmod and check each available pads
+ * if pad is enabled then set wakeup enable flag for the mux pin.
+ * Return error if pads are not enabled or not available.
+ * Wakeup enable flag will be we used during hwmod idle transistion.
+ */
+int omap_device_enable_ioring_wakeup(struct platform_device *pdev)
+{
+ int ret = -EINVAL, i;
+ struct omap_device *od;
+ struct omap_hwmod *oh;
+
+ od = _find_by_pdev(pdev);
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ oh = od->hwmods[i];
+ ret = omap_hwmod_enable_ioring_wakeup(oh);
+ }
+
+ return ret;
+}
+
+/**
+ * omap_device_disable_ioring_wakeup - Clear wakeup bit for iopad ring.
+ * @pdev: platform_device for which wakeup needs to be cleared.
+ *
+ * Caller should ensure this is called if device_may_wakeup(dev) is false
+ * traverse through each hwmod and check each available pads
+ * if pad is enabled then clear wakeup enable flag for the mux pin.
+ * Return error if pads are not enabled or not available.
+ * Wakeup enable flag will be we used during hwmod idle transistion.
+ */
+int omap_device_disable_ioring_wakeup(struct platform_device *pdev)
+{
+ int ret = -EINVAL, i;
+ struct omap_device *od;
+ struct omap_hwmod *oh;
+
+ od = _find_by_pdev(pdev);
+ for (i = 0; i < od->hwmods_cnt; i++) {
+ oh = od->hwmods[i];
+ ret = omap_hwmod_disable_ioring_wakeup(oh);
+ }
+
+ return ret;
+}
+
/*
* Public functions intended for use in omap_device_pm_latency
* .activate_func and .deactivate_func function pointers
--
1.7.1
--
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