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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: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220406163701.1277930-2-l.stach@pengutronix.de
This commit is contained in:
Lucas Stach 2022-04-06 18:37:01 +02:00 committed by Marc Zyngier
parent e9a50f12e5
commit 4730d22333
1 changed files with 11 additions and 3 deletions
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14
drivers/irqchip/irq-imx-irqsteer.c
View File

@ -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[] = {