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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
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@ -12,6 +12,7 @@
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#include <linux/kernel.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/pm_runtime.h>
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#include <linux/spinlock.h>
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#define CTRL_STRIDE_OFF(_t, _r) (_t * 4 * _r)
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@ -175,7 +176,7 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
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data->irq_count = DIV_ROUND_UP(irqs_num, 64);
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data->reg_num = irqs_num / 32;
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if (IS_ENABLED(CONFIG_PM_SLEEP)) {
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if (IS_ENABLED(CONFIG_PM)) {
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data->saved_reg = devm_kzalloc(&pdev->dev,
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sizeof(u32) * data->reg_num,
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GFP_KERNEL);
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@ -199,6 +200,7 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
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ret = -ENOMEM;
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goto out;
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}
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irq_domain_set_pm_device(data->domain, &pdev->dev);
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if (!data->irq_count || data->irq_count > CHAN_MAX_OUTPUT_INT) {
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ret = -EINVAL;
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@ -219,6 +221,9 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
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platform_set_drvdata(pdev, data);
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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return 0;
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out:
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clk_disable_unprepare(data->ipg_clk);
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@ -241,7 +246,7 @@ static int imx_irqsteer_remove(struct platform_device *pdev)
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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#ifdef CONFIG_PM
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static void imx_irqsteer_save_regs(struct irqsteer_data *data)
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{
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int i;
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@ -288,7 +293,10 @@ static int imx_irqsteer_resume(struct device *dev)
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#endif
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static const struct dev_pm_ops imx_irqsteer_pm_ops = {
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SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(imx_irqsteer_suspend, imx_irqsteer_resume)
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SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
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pm_runtime_force_resume)
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SET_RUNTIME_PM_OPS(imx_irqsteer_suspend,
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imx_irqsteer_resume, NULL)
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};
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static const struct of_device_id imx_irqsteer_dt_ids[] = {
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