Commit 4730d223 authored by Lucas Stach's avatar Lucas Stach Committed by Marc Zyngier
Browse files

irqchip/imx-irqsteer: Add runtime PM support 



There are now SoCs that integrate the irqsteer controller within
a separate power domain. In order to allow this domain to be
powered down when not needed, add runtime PM support to the driver.

Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220406163701.1277930-2-l.stach@pengutronix.de
parent e9a50f12

drivers/irqchip/irq-imx-irqsteer.c

+11 −3
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/kernel.h>

#include <linux/of_irq.h>

#include <linux/of_platform.h>

#include <linux/pm_runtime.h>

#include <linux/spinlock.h>



#define CTRL_STRIDE_OFF(_t, _r)	(_t * 4 * _r)
@@ -175,7 +176,7 @@ static int imx_irqsteer_probe(struct platform_device *pdev) 
	data->irq_count = DIV_ROUND_UP(irqs_num, 64);

	data->reg_num = irqs_num / 32;



	if (IS_ENABLED(CONFIG_PM_SLEEP)) {

	if (IS_ENABLED(CONFIG_PM)) {

		data->saved_reg = devm_kzalloc(&pdev->dev,

					sizeof(u32) * data->reg_num,

					GFP_KERNEL);
@@ -199,6 +200,7 @@ static int imx_irqsteer_probe(struct platform_device *pdev) 
		ret = -ENOMEM;

		goto out;

	}

	irq_domain_set_pm_device(data->domain, &pdev->dev);



	if (!data->irq_count || data->irq_count > CHAN_MAX_OUTPUT_INT) {

		ret = -EINVAL;
@@ -219,6 +221,9 @@ static int imx_irqsteer_probe(struct platform_device *pdev) 


	platform_set_drvdata(pdev, data);



	pm_runtime_set_active(&pdev->dev);

	pm_runtime_enable(&pdev->dev);



	return 0;

out:

	clk_disable_unprepare(data->ipg_clk);
@@ -241,7 +246,7 @@ static int imx_irqsteer_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_PM

static void imx_irqsteer_save_regs(struct irqsteer_data *data)

{

	int i;
@@ -288,7 +293,10 @@ static int imx_irqsteer_resume(struct device *dev) 
#endif



static const struct dev_pm_ops imx_irqsteer_pm_ops = {

	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(imx_irqsteer_suspend, imx_irqsteer_resume)

	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,

				      pm_runtime_force_resume)

	SET_RUNTIME_PM_OPS(imx_irqsteer_suspend,

			   imx_irqsteer_resume, NULL)

};



static const struct of_device_id imx_irqsteer_dt_ids[] = {