From 3b4c46e6f1fbeeaa80b5ee4ee351cc238a9437bd Mon Sep 17 00:00:00 2001
From: Mohan Kumar <mkumard@nvidia.com>
Date: Fri, 15 Jul 2016 11:29:56 +0530
Subject: [PATCH] ASoC: tegra-alt: Support dynamic pinmux for spdif

Support dynamic pinmux settings for dspk, this change will help
to runtime configure the pinmux register to use pinmuxed path.

Change-Id: Ice8236e17e55f9fb58566f65a638b750fc7bdd00
Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Reviewed-on: http://git-master/r/1181863
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
---
 sound/soc/tegra-alt/tegra210_spdif_alt.c | 60 +++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra-alt/tegra210_spdif_alt.c b/sound/soc/tegra-alt/tegra210_spdif_alt.c
index e6ed0e99..3ac5b85f 100644
--- a/sound/soc/tegra-alt/tegra210_spdif_alt.c
+++ b/sound/soc/tegra-alt/tegra210_spdif_alt.c
@@ -31,6 +31,7 @@
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/pinctrl/pinconf-tegra.h>
 
 #include "tegra210_xbar_alt.h"
@@ -59,10 +60,19 @@ static const struct reg_default tegra210_spdif_reg_defaults[] = {
 static int tegra210_spdif_runtime_suspend(struct device *dev)
 {
 	struct tegra210_spdif *spdif = dev_get_drvdata(dev);
+	int ret;
 
 	regcache_cache_only(spdif->regmap, true);
 	regcache_mark_dirty(spdif->regmap);
 	if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
+		if (!IS_ERR(spdif->pin_idle_state) && spdif->is_pinctrl) {
+			ret = pinctrl_select_state(
+				spdif->pinctrl, spdif->pin_idle_state);
+			if (ret < 0)
+				dev_err(dev,
+				"setting dap pinctrl idle state failed\n");
+		}
+
 		clk_disable_unprepare(spdif->clk_spdif_out);
 		clk_disable_unprepare(spdif->clk_spdif_in);
 	}
@@ -84,6 +94,14 @@ static int tegra210_spdif_runtime_resume(struct device *dev)
 	}
 
 	if (!(tegra_platform_is_unit_fpga() || tegra_platform_is_fpga())) {
+		if (!IS_ERR(spdif->pin_active_state) && spdif->is_pinctrl) {
+			ret = pinctrl_select_state(spdif->pinctrl,
+						spdif->pin_active_state);
+			if (ret < 0)
+				dev_err(dev,
+				"setting dap pinctrl active state failed\n");
+		}
+
 		ret = clk_prepare_enable(spdif->clk_spdif_out);
 		if (ret) {
 			dev_err(dev, "spdif_out_clk_enable failed: %d\n", ret);
@@ -540,9 +558,47 @@ static int tegra210_spdif_platform_probe(struct platform_device *pdev)
 		goto err_suspend;
 	}
 
-	if (of_property_read_string(np, "prod-name", &prod_name) == 0)
-		tegra_pinctrl_config_prod(&pdev->dev, prod_name);
+	if (of_property_read_string(np, "prod-name", &prod_name) == 0) {
+		ret = tegra_pinctrl_config_prod(&pdev->dev, prod_name);
+		if (ret < 0)
+			dev_warn(&pdev->dev, "Failed to set %s setting\n",
+					prod_name);
+	}
 
+	if (of_property_read_u32(np, "nvidia,is-pinctrl",
+				&spdif->is_pinctrl) < 0)
+		spdif->is_pinctrl = 0;
+
+	if (spdif->is_pinctrl) {
+		spdif->pinctrl = devm_pinctrl_get(&pdev->dev);
+		if (IS_ERR(spdif->pinctrl)) {
+			dev_warn(&pdev->dev, "Missing pinctrl device\n");
+			goto err_dap;
+		}
+
+		spdif->pin_active_state = pinctrl_lookup_state(spdif->pinctrl,
+									"dap_active");
+		if (IS_ERR(spdif->pin_active_state)) {
+			dev_warn(&pdev->dev, "Missing dap-active state\n");
+			goto err_dap;
+		}
+
+		spdif->pin_idle_state = pinctrl_lookup_state(spdif->pinctrl,
+								"dap_inactive");
+		if (IS_ERR(spdif->pin_idle_state)) {
+			dev_warn(&pdev->dev, "Missing dap-inactive state\n");
+			goto err_dap;
+		}
+
+		ret = pinctrl_select_state(spdif->pinctrl,
+						spdif->pin_idle_state);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "setting state failed\n");
+			goto err_dap;
+		}
+	}
+
+err_dap:
 	dev_set_drvdata(&pdev->dev, spdif);
 
 	return 0;