diff options
| author | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2012-04-13 23:25:04 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-27 10:16:34 -0700 |
| commit | cbd267314935af45bca6fcaabc99d6fa1268ec4c (patch) | |
| tree | 585820f36857a60c8c36c3903fda8d9dfc798115 /arch | |
| parent | bf7e0bbbd566798fa1426d318284a1c3362a7890 (diff) | |
ARM: OMAP: serial: Fix the ocp smart idlemode handling bug
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 <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>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/serial.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index f590afc1f673..4e1d45e98d66 100644 --- 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 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 |