This is a note to let you know that I've just added the patch titled
ARM: OMAP: serial: Fix the ocp smart idlemode handling bug
to the 3.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-omap-serial-fix-the-ocp-smart-idlemode-handling-bug.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 5ae256dcd91bf308826a4ac19598b27ebb86a536 Mon Sep 17 00:00:00 2001
From: Santosh Shilimkar <[email protected]>
Date: Fri, 13 Apr 2012 23:25:04 +0530
Subject: ARM: OMAP: serial: Fix the ocp smart idlemode handling bug
From: Santosh Shilimkar <[email protected]>
commit 5ae256dcd91bf308826a4ac19598b27ebb86a536 upstream.
The current serial UART code, while fidling with ocp idlemode bits,
forget about the smart idle wakeup bit even if it is supported by
UART IP block. This will lead to missing the module wakeup on OMAP's
where the smart idle wakeup is supported.
This was the root cause of the console sluggishness issue, I have been
observing on OMAP4 devices and also can be potential reason for some
other UART wakeup issues.
Signed-off-by: Santosh Shilimkar <[email protected]>
Acked-by: Kevin Hilman <[email protected]>
Acked-by: Govindraj.R <[email protected]>
Reviewed-by: Paul Walmsley <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/mach-omap2/serial.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -110,8 +110,14 @@ static void omap_uart_set_noidle(struct
static void omap_uart_set_smartidle(struct platform_device *pdev)
{
struct omap_device *od = to_omap_device(pdev);
+ u8 idlemode;
- omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_SMART);
+ if (od->hwmods[0]->class->sysc->idlemodes & SIDLE_SMART_WKUP)
+ idlemode = HWMOD_IDLEMODE_SMART_WKUP;
+ else
+ idlemode = HWMOD_IDLEMODE_SMART;
+
+ omap_hwmod_set_slave_idlemode(od->hwmods[0], idlemode);
}
#else
Patches currently in stable-queue which might be from [email protected]
are
queue-3.3/arm-omap-serial-fix-the-ocp-smart-idlemode-handling-bug.patch
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