Kishon Vijay Abraham I | 31 Jan 13:34 2011
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[PATCH v2 2/2] OMAP: omap_device: API to modify AUTOIDLE and SMARTIDLE bits

Provide APIs to be used by the driver in order to modify AUTOIDLE
and SIDLE bits. These APIs in turn call hwmod APIs to modify the
SYSCONFIG register.

Signed-off-by: Kishon Vijay Abraham I <kishon <at> ti.com>
Signed-off-by: Benoit Cousson <b-cousson <at> ti.com>
Cc: Paul Walmsley <paul <at> pwsan.com>
---
 arch/arm/plat-omap/include/plat/omap_device.h |    6 +
 arch/arm/plat-omap/omap_device.c              |  176 +++++++++++++++++++++++++
 2 files changed, 182 insertions(+), 0 deletions(-)

diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
index e4c349f..47ad0ab 100644
--- a/arch/arm/plat-omap/include/plat/omap_device.h
+++ b/arch/arm/plat-omap/include/plat/omap_device.h
 <at>  <at>  -110,6 +110,12  <at>  <at>  struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
 u32 omap_device_get_context_loss_count(struct platform_device *pdev);

 /* Other */
+int omap_device_noidle(struct omap_device *od);
+int omap_device_smartidle(struct omap_device *od);
+int omap_device_forceidle(struct omap_device *od);
+int omap_device_default_idle(struct omap_device *od);
+int omap_device_enable_autoidle(struct omap_device *od);
+int omap_device_disable_autoidle(struct omap_device *od);

 int omap_device_idle_hwmods(struct omap_device *od);
 int omap_device_enable_hwmods(struct omap_device *od);
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
index 57adb27..da8609a 100644
--- a/arch/arm/plat-omap/omap_device.c
+++ b/arch/arm/plat-omap/omap_device.c
 <at>  <at>  -726,6 +726,182  <at>  <at>  void __iomem *omap_device_get_rt_va(struct omap_device *od)
 	return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
 }

+/**
+ * omap_device_noidle - set the device's slave idlemode to no idle
+ *  <at> od: struct omap_device *
+ *
+ * Sets the IP block's OCP slave idlemode in hardware to no idle.
+ * Intended to be used by drivers that have some erratum that requires direct
+ * manipulation of the SIDLEMODE bits.  Returns -EINVAL if  <at> od is in invalid
+ * state, or passes along the return value from
+ * omap_hwmod_set_slave_idlemode().
+ */
+int omap_device_noidle(struct omap_device *od)
+{
+	int retval = 0, i;
+
+	if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+		WARN(1, "omap_device: %s.%d: %s() called from invalid state "
+			"%d\n", od->pdev.name, od->pdev.id, __func__,
+			od->_state);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < od->hwmods_cnt; i++)
+		retval |= omap_hwmod_set_slave_idlemode(od->hwmods[i],
+					HWMOD_IDLEMODE_NO);
+
+	return retval;
+}
+
+
+/**
+ * omap_device_smartidle - set the device's slave idlemode to smart idle
+ *  <at> od: struct omap_device *
+ *
+ * Sets the IP block's OCP slave idlemode in hardware to smart idle.
+ * Intended to be used by drivers that have some erratum that requires direct
+ * manipulation of the SIDLEMODE bits.  Returns -EINVAL if  <at> od is in invalid
+ * state, or passes along the return value from
+ * omap_hwmod_set_slave_idlemode().
+ */
+int omap_device_smartidle(struct omap_device *od)
+{
+	int retval = 0, i;
+
+	if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+		WARN(1, "omap_device: %s.%d: %s() called from invalid state "
+			"%d\n", od->pdev.name, od->pdev.id, __func__,
+			od->_state);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < od->hwmods_cnt; i++)
+		retval |= omap_hwmod_set_slave_idlemode(od->hwmods[i],
+					HWMOD_IDLEMODE_SMART);
+
+	return retval;
+}
+
+
+/**
+ * omap_device_forceidle - set the device's slave idlemode to force idle
+ *  <at> od: struct omap_device *
+ *
+ * Sets the IP block's OCP slave idlemode in hardware to force idle.
+ * Intended to be used by drivers that have some erratum that requires direct
+ * manipulation of the SIDLEMODE bits.  Returns -EINVAL if  <at> od is in invalid
+ * state, or passes along the return value from
+ * omap_hwmod_set_slave_idlemode().
+ */
+int omap_device_forceidle(struct omap_device *od)
+{
+	int retval = 0, i;
+
+	if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+		WARN(1, "omap_device: %s.%d: %s() called from invalid state "
+			"%d\n", od->pdev.name, od->pdev.id, __func__,
+			od->_state);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < od->hwmods_cnt; i++)
+		retval |= omap_hwmod_set_slave_idlemode(od->hwmods[i],
+					HWMOD_IDLEMODE_FORCE);
+
+	return retval;
+}
+
+/**
+ * omap_device_default_idle - set the device's slave idlemode to no idle or
+ * smart idle based on the hwmod flag
+ *  <at> od: struct omap_device *
+ *
+ * Sets the IP block's OCP slave idlemode in hardware to no idle or smart idle
+ * depending on status of the flag HWMOD_SWSUP_SIDLE.
+ * Intended to be used by drivers that have some erratum that requires direct
+ * manipulation of the SIDLEMODE bits.  Returns -EINVAL if  <at> od is in invalid
+ * state, or passes along the return value from
+ * omap_hwmod_set_slave_idlemode().
+ */
+int omap_device_default_idle(struct omap_device *od)
+{
+	int retval = 0, i;
+	u8 idlemode;
+
+	if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+		WARN(1, "omap_device: %s.%d: %s() called from invalid state "
+			"%d\n", od->pdev.name, od->pdev.id, __func__,
+		od->_state);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < od->hwmods_cnt; i++) {
+		idlemode = (od->hwmods[i]->flags & HWMOD_SWSUP_SIDLE) ?
+				HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
+		retval |= omap_hwmod_set_slave_idlemode(od->hwmods[i],
+				idlemode);
+	}
+
+	return retval;
+}
+
+/*
+ * omap_device_enable_autoidle - enable the device's OCP slave autoidle
+ *  <at> od: struct omap_device *
+ *
+ * Sets the IP block's OCP slave autoidle in hardware.
+ * Intended to be used by drivers that have some erratum that requires direct
+ * manipulation of the AUTOIDLE bits.  Returns -EINVAL if  <at> od is in invalid
+ * state, or passes along the return value from
+ * omap_hwmod_set_slave_autoidle().
+ */
+int omap_device_enable_autoidle(struct omap_device *od)
+{
+	int retval = 0, i;
+
+	if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+		WARN(1, "omap_device: %s.%d: %s() called from invalid state "
+			"%d\n", od->pdev.name, od->pdev.id, __func__,
+			od->_state);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < od->hwmods_cnt; i++)
+		retval |= omap_hwmod_set_slave_autoidle(od->hwmods[i],
+					true);
+
+	return retval;
+}
+
+/*
+ * omap_device_disable_autoidle - disable the device's OCP slave autoidle
+ *  <at> od: struct omap_device *
+ *
+ * Disables the IP block's OCP slave autoidle in hardware.
+ * Intended to be used by drivers that have some erratum that requires direct
+ * manipulation of the AUTOIDLE bits.  Returns -EINVAL if  <at> od is in invalid
+ * state, or passes along the return value from
+ * omap_hwmod_set_slave_autoidle().
+ */
+int omap_device_disable_autoidle(struct omap_device *od)
+{
+	int retval = 0, i;
+
+	if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
+		WARN(1, "omap_device: %s.%d: %s() called from invalid state "
+			"%d\n", od->pdev.name, od->pdev.id, __func__,
+			od->_state);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < od->hwmods_cnt; i++)
+		retval |= omap_hwmod_set_slave_autoidle(od->hwmods[i],
+					false);
+
+	return retval;
+}
+
 /*
  * Public functions intended for use in omap_device_pm_latency
  * .activate_func and .deactivate_func function pointers
--

-- 
1.7.0.4

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