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ARM: OMAP: serial: Fix the ocp smart idlemode handling bug 

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 <santosh.shilimkar@ti.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Santosh Shilimkar 2012-04-13 23:25:04 +05:30 committed by Tony Lindgren
parent bce492c04b
commit 5ae256dcd9
1 changed files with 7 additions and 1 deletions
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8
arch/arm/mach-omap2/serial.c
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@ -108,8 +108,14 @@ static void omap_uart_set_noidle(struct platform_device *pdev)
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