forked from Minki/linux
28ce556b2e
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>
96 lines
2.1 KiB
Plaintext
96 lines
2.1 KiB
Plaintext
/*
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* Copyright (C) 2014 Florian Vaussard, EPFL Mobots group
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* Peripherals common to all Gumstix Overo boards (Tobi, Summit, Palo43,...)
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*/
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/ {
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lis33_3v3: lis33-3v3-reg {
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compatible = "regulator-fixed";
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regulator-name = "lis33-3v3-reg";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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lis33_1v8: lis33-1v8-reg {
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compatible = "regulator-fixed";
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regulator-name = "lis33-1v8-reg";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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};
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};
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&omap3_pmx_core {
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i2c3_pins: pinmux_i2c3_pins {
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pinctrl-single,pins = <
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OMAP3_CORE1_IOPAD(0x21c2, PIN_INPUT | MUX_MODE0) /* i2c3_scl.i2c3_scl */
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OMAP3_CORE1_IOPAD(0x21c4, PIN_INPUT | MUX_MODE0) /* i2c3_sda.i2c3_sda */
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>;
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};
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uart3_pins: pinmux_uart3_pins {
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pinctrl-single,pins = <
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OMAP3_CORE1_IOPAD(0x219e, PIN_INPUT | MUX_MODE0) /* uart3_rx_irrx.uart3_rx_irrx */
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OMAP3_CORE1_IOPAD(0x21a0, PIN_OUTPUT | MUX_MODE0) /* uart3_tx_irtx.uart3_tx_irtx */
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>;
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};
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};
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&i2c3 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c3_pins>;
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clock-frequency = <100000>;
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/* optional 1K EEPROM with revision information */
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eeprom@51 {
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compatible = "atmel,24c01";
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reg = <0x51>;
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pagesize = <8>;
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};
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lis33de: lis33de@1d {
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compatible = "st,lis33de", "st,lis3lv02d";
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reg = <0x1d>;
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Vdd-supply = <&lis33_1v8>;
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Vdd_IO-supply = <&lis33_3v3>;
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st,click-single-x;
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st,click-single-y;
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st,click-single-z;
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st,click-thresh-x = <10>;
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st,click-thresh-y = <10>;
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st,click-thresh-z = <10>;
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st,irq1-click;
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st,irq2-click;
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st,wakeup-x-lo;
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st,wakeup-x-hi;
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st,wakeup-y-lo;
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st,wakeup-y-hi;
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st,wakeup-z-lo;
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st,wakeup-z-hi;
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st,min-limit-x = <120>;
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st,min-limit-y = <120>;
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st,min-limit-z = <140>;
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st,max-limit-x = <550>;
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st,max-limit-y = <550>;
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st,max-limit-z = <750>;
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};
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};
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&mmc3 {
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status = "disabled";
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};
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&uart3 {
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interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>;
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pinctrl-names = "default";
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pinctrl-0 = <&uart3_pins>;
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};
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