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Commit e5365f1b authored by qctecmdr Service's avatar qctecmdr Service Committed by Gerrit - the friendly Code Review server
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Merge "soc: qcom: smp2p_sleepstate: Add inbound notification"

parents c4ff35ab 0d1d05ce

Documentation/devicetree/bindings/arm/msm/sleepstate-smp2p.txt

+7 −0
Original line number Diff line number Diff line
@@ -4,9 +4,16 @@ Required properties: 
-compatible : should be one of the following:

- "qcom,smp2p-sleepstate"

-qcom,smem-states : the relevant outgoing smp2p entry

- interrupt-parent: specifies the phandle to the parent interrupt controller

  this one is cascaded from

- interrupts: specifies the interrupt number, the irq line to be used

- interrupt-names: Interrupt name string, must be "smp2p-sleepstate-in"



Example:

qcom,smp2p_sleepstate {

	compatible = "qcom,smp2p-sleepstate";

	qcom,smem-states = <&sleepstate_smp2p_out 0>;

	interrupt-parent = <&sleepstate_smp2p_in>;

	interrupts = <0 0>;

	interrupt-names = "smp2p-sleepstate-in";

};

arch/arm64/boot/dts/qcom/sm8150-smp2p.dtsi

+6 −0
Original line number Diff line number Diff line
@@ -100,6 +100,12 @@ 
			qcom,entry-name = "sleepstate";

			#qcom,smem-state-cells = <1>;

		};



		sleepstate_smp2p_in: qcom,sleepstate-in {

			qcom,entry-name = "sleepstate_see";

			interrupt-controller;

			#interrupt-cells = <2>;

		};

	};



	qcom,smp2p-cdsp@1799000c {

arch/arm64/boot/dts/qcom/sm8150.dtsi

+3 −0
Original line number Diff line number Diff line
@@ -2896,6 +2896,9 @@ 
	qcom,smp2p_sleepstate {

		compatible = "qcom,smp2p-sleepstate";

		qcom,smem-states = <&sleepstate_smp2p_out 0>;

		interrupt-parent = <&sleepstate_smp2p_in>;

		interrupts = <0 0>;

		interrupt-names = "smp2p-sleepstate-in";

	};



	system_pm {

drivers/soc/qcom/smp2p_sleepstate.c

+32 −0
Original line number Diff line number Diff line
@@ -13,10 +13,16 @@ 
#include <linux/suspend.h>

#include <linux/platform_device.h>

#include <linux/soc/qcom/smem_state.h>

#include <linux/interrupt.h>

#include <linux/irqreturn.h>

#include <linux/of_irq.h>

#include <linux/of.h>

#include <linux/pm_wakeup.h>



#define PROC_AWAKE_ID 12 /* 12th bit */

#define AWAKE_BIT BIT(PROC_AWAKE_ID)

static struct qcom_smem_state *state;

struct wakeup_source notify_ws;



/**

 * sleepstate_pm_notifier() - PM notifier callback function.
@@ -48,9 +54,18 @@ static struct notifier_block sleepstate_pm_nb = { 
	.priority = INT_MAX,

};



static irqreturn_t smp2p_sleepstate_handler(int irq, void *ctxt)

{

	__pm_wakeup_event(&notify_ws, 200);

	return IRQ_HANDLED;

}



static int smp2p_sleepstate_probe(struct platform_device *pdev)

{

	int ret;

	int irq = -1;

	struct device *dev = &pdev->dev;

	struct device_node *node = dev->of_node;



	state = qcom_smem_state_get(&pdev->dev, 0, &ret);

	if (IS_ERR(state))
@@ -61,6 +76,23 @@ static int smp2p_sleepstate_probe(struct platform_device *pdev) 
	if (ret)

		pr_err("%s: power state notif error %d\n", __func__, ret);



	wakeup_source_init(&notify_ws, "smp2p-sleepstate");



	irq = of_irq_get_byname(node, "smp2p-sleepstate-in");

	if (irq <= 0) {

		pr_err("failed for irq getbyname for smp2p_sleep_state\n");

		wakeup_source_trash(&notify_ws);

		return -EPROBE_DEFER;

	}

	pr_info("got smp2p-sleepstate-in irq %d\n", irq);

	ret = devm_request_threaded_irq(dev, irq, NULL,

		(irq_handler_t)smp2p_sleepstate_handler,

		IRQF_TRIGGER_RISING, "smp2p_sleepstate", dev);

	if (ret) {

		pr_err("fail to register smp2p threaded_irq=%d\n", irq);

		wakeup_source_trash(&notify_ws);

		return ret;

	}

	return 0;

}