On 8/6/2010 7:28 PM, Kalliguddi, Hema wrote:
From: Hema HK<hemahk@xxxxxx>
Omap USBOTG modules has a requirement to set the auto idle bit only after
setting smart idle bit.
Is it a requirement or an errata? Could you provide more information
(i.e. TRM page or errata number / description)?
Modified the _sys_enable api to set the smart idle
first and then the autoidle bit. Setting this will not have any impact on the
other modules.
Added 2 wrapper APIs in the omap device layer for wakeup enable/disable
and sidle/mstandby settings.
Signed-off-by: Hema HK<hemahk@xxxxxx>
Signed-off-by: Basak, Partha<p-basak2@xxxxxx>
Cc: Felipe Balbi<felipe.balbi@xxxxxxxxx>
Cc: Tony Lindgren<tony@xxxxxxxxxxx>
Cc: Kevin Hilman<khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/omap_hwmod.c | 18 +++++++----
arch/arm/plat-omap/include/plat/omap_device.h | 2 +
arch/arm/plat-omap/omap_device.c | 42 ++++++++++++++++++++++++++
3 files changed, 56 insertions(+), 6 deletions(-)
Index: linux-omap-pm/arch/arm/mach-omap2/omap_hwmod.c
===================================================================
--- linux-omap-pm.orig/arch/arm/mach-omap2/omap_hwmod.c 2010-08-06 08:59:03.641863815 -0400
+++ linux-omap-pm/arch/arm/mach-omap2/omap_hwmod.c 2010-08-06 09:02:00.021864999 -0400
@@ -653,12 +653,6 @@
_set_master_standbymode(oh, idlemode,&v);
}
- if (sf& SYSC_HAS_AUTOIDLE) {
- idlemode = (oh->flags& HWMOD_NO_OCP_AUTOIDLE) ?
- 0 : 1;
- _set_module_autoidle(oh, idlemode,&v);
- }
-
/* XXX OCP ENAWAKEUP bit? */
/*
@@ -671,6 +665,18 @@
_set_clockactivity(oh, oh->class->sysc->clockact,&v);
_write_sysconfig(v, oh);
+
+ /* Set the auto idle bit only after setting the smartidle bit
+ * as this is requirement for some modules like USBOTG
+ * setting this will not have any impact on the other modues.
+ */
Except that you are adding an extra access to a quite slow L4 slave
interface. I'm not sure if write posted will help in that case.
+
+ if (sf& SYSC_HAS_AUTOIDLE) {
+ idlemode = (oh->flags& HWMOD_NO_OCP_AUTOIDLE) ?
+ 0 : 1;
+ _set_module_autoidle(oh, idlemode,&v);
+ }
+ _write_sysconfig(v, oh);
}
/**
Index: linux-omap-pm/arch/arm/plat-omap/include/plat/omap_device.h
===================================================================
--- linux-omap-pm.orig/arch/arm/plat-omap/include/plat/omap_device.h 2010-08-06 08:59:03.661863725 -0400
+++ linux-omap-pm/arch/arm/plat-omap/include/plat/omap_device.h 2010-08-06 09:02:00.021864999 -0400
@@ -116,6 +116,8 @@
int omap_device_disable_clocks(struct omap_device *od);
int omap_device_enable_clocks(struct omap_device *od);
+int omap_device_enable_wakeup(struct omap_device *od);
+int omap_device_disable_wakeup(struct omap_device *od);
/*
* Entries should be kept in latency order ascending
Index: linux-omap-pm/arch/arm/plat-omap/omap_device.c
===================================================================
--- linux-omap-pm.orig/arch/arm/plat-omap/omap_device.c 2010-08-06 08:59:03.661863725 -0400
+++ linux-omap-pm/arch/arm/plat-omap/omap_device.c 2010-08-06 09:02:00.021864999 -0400
@@ -757,3 +757,45 @@
/* XXX pass along return value here? */
return 0;
}
+
+/**
+ * omap_device_enable_wakeup - Enable the wakeup bit
+ * @od: struct omap_device *od
+ *
+ * Enable the wakup bit for omap_hwmods associated
+ * with the omap_device. Returns 0.
+ */
+
+int omap_device_enable_wakeup(struct omap_device *od)
Why do you need that? Could you elaborate?
Benoit
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