Commit Graph

3 Commits

Author SHA1 Message Date
Tony Lindgren 28ce556b2e ARM: dts: omap3-overo: Fix UART wake-up events
Compared to legacy booting, we don't have wake-up events enabled
for device tree based booting. This means that if deeper idle
states are enabled, the device won't wake up to UART events and
seems like it has hung.

Let's fix that by adding the wake-up interrupt. Note that we
don't need to set the PIN_OFF_WAKEUPENABLE any longer, that's
handled by the wake-up interrupt when the serial driver does
request_irq on it.

Tested with the following on omap3-overo-summit that has the
ES2.1 omap:

#!/bin/bash

uarts=$(find /sys/class/tty/ttyO*/device/power/ -type d)
for uart in $uarts; do
        echo 3000 > $uart/autosuspend_delay_ms
done

uarts=$(find /sys/class/tty/ttyO*/power/ -type d)
for uart in $uarts; do
        echo enabled > $uart/wakeup
        echo auto > $uart/control
done

echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode

# grep -i uart /proc/interrupts
 90:       1085      INTC  74  OMAP UART2
338:          5   pinctrl 366  OMAP UART2

# grep ^core_pwrdm /sys/kernel/debug/pm_debug/count
core_pwrdm (ON),OFF:1654,RET:131,INA:39,ON:1825...

Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-09-18 09:03:36 -07:00
Florian Vaussard 72a5cf147d ARM: dts: overo: Add LIS33DE accelerometer
The LIS33DE accelerometer is used on several Gumstix expansion boards,
thus add the DT node to omap3-overo-common-peripherals.dtsi.

For the boards that do not have the accelerometer (like Tobi), mark the
status as disabled.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-03-12 10:21:12 -07:00
Florian Vaussard 385306cc3e ARM: dts: overo: Create a file for common Gumstix peripherals
Gumstix expansion boards share a couple of peripherals:
- uart3 is used for the console
- AT24C01 EEPROM on i2c3

Use this file for overo-tobi.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-03-12 10:21:12 -07:00