From 731b409878a3b4387ce824f48228f4e161e20e1c Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 2 Jul 2018 23:57:32 -0700 Subject: [PATCH] ARM: dts: Configure duovero for to allow core retention during idle By reconfiguring few GPIOs in the dts file we can make duovero parlor hit retention during idle: 1. Let's a larger debounce value for gpio-keys This will then make gpio-keys use software debounce and the GPIO debounce clock is not enabled. 2. Let's allow WLAN suspend for mwifiex This can be done just by adding keep-power-in-suspend. 3. Let's reconfigure smsc911x driver to use GPIO edge interrupt This will allow using NFSroot while the system idles, and the kernel has quite a few dts files with "smsc,lan9115" compatible using edge interrupts. Then to have the system hit core retention during idle, the UARTs needs to be idled and USB modules need to be unloaded or unbound. Cc: Ash Charles Signed-off-by: Tony Lindgren --- arch/arm/boot/dts/omap4-duovero-parlor.dts | 4 +++- arch/arm/boot/dts/omap4-duovero.dtsi | 1 + 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/omap4-duovero-parlor.dts b/arch/arm/boot/dts/omap4-duovero-parlor.dts index a9a584b5b955..cfcac0d73851 100644 --- a/arch/arm/boot/dts/omap4-duovero-parlor.dts +++ b/arch/arm/boot/dts/omap4-duovero-parlor.dts @@ -36,6 +36,8 @@ label = "button0"; linux,code = ; gpios = <&gpio4 25 GPIO_ACTIVE_LOW>; /* gpio_121 */ + /* Value above 7.95ms for no GPIO hardware debounce */ + debounce-interval = <10>; wakeup-source; }; }; @@ -140,7 +142,7 @@ ethernet@gpmc { reg = <5 0 0xff>; interrupt-parent = <&gpio2>; - interrupts = <12 IRQ_TYPE_LEVEL_LOW>; /* gpio_44 */ + interrupts = <12 IRQ_TYPE_EDGE_FALLING>; /* gpio_44 */ phy-mode = "mii"; diff --git a/arch/arm/boot/dts/omap4-duovero.dtsi b/arch/arm/boot/dts/omap4-duovero.dtsi index eb123b24c8e3..5e8169153414 100644 --- a/arch/arm/boot/dts/omap4-duovero.dtsi +++ b/arch/arm/boot/dts/omap4-duovero.dtsi @@ -248,6 +248,7 @@ ti,bus-width = <4>; ti,non-removable; cap-power-off-card; + keep-power-in-suspend; }; &twl_usb_comparator { -- 2.25.1