From f11933205182a3da44e7f99d899dd27adafcb6d5 Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Tue, 29 Jan 2019 14:51:24 +0800
Subject: [PATCH] ASoC: fsl_sai: support multi power domain

support multi power domain

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 sound/soc/fsl/fsl_sai.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/pm_qos.h>
+#include <linux/pm_domain.h>
 #include <sound/core.h>
 #include <sound/dmaengine_pcm.h>
 #include <sound/pcm_params.h>
@@ -1357,6 +1358,7 @@ static int fsl_sai_probe(struct platform
 	int index;
 	struct regmap_config fsl_sai_regmap_config = fsl_sai_v2_regmap_config;
 	unsigned long irqflags = 0;
+	int num_domains = 0;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -1409,6 +1411,24 @@ static int fsl_sai_probe(struct platform
 		}
 	}
 
+	num_domains = of_count_phandle_with_args(np, "power-domains",
+						 "#power-domain-cells");
+	for (i = 0; i < num_domains; i++) {
+		struct device *pd_dev;
+		struct device_link *link;
+
+		pd_dev = dev_pm_domain_attach_by_id(&pdev->dev, i);
+		if (IS_ERR(pd_dev))
+			return PTR_ERR(pd_dev);
+
+		link = device_link_add(&pdev->dev, pd_dev,
+			DL_FLAG_STATELESS |
+			DL_FLAG_PM_RUNTIME |
+			DL_FLAG_RPM_ACTIVE);
+		if (IS_ERR(link))
+			return PTR_ERR(link);
+	}
+
 	sai->pll8k_clk = devm_clk_get(&pdev->dev, "pll8k");
 	if (IS_ERR(sai->pll8k_clk))
 		sai->pll8k_clk = NULL;