From 2d3acf441378142418aad092ff39aeedeb2389b9 Mon Sep 17 00:00:00 2001
From: lixp5 <lixp5@lenovo.com>
Date: Wed, 28 Nov 2018 14:50:17 +0800
Subject: [PATCH] ASoC: cs35l41: Add a file node for TCMD to read
 CS35L41_GPIO_STATUS1

TCMD needs to check the connectivity of the CDC_LP_GATE line by reading GPIO1 status,
and CS35L41_GPIO_STATUS1 indicates the status of GPIO1.

Change-Id: I4a563cc228a455f9995fc92bfcf4b11cdfd6136b
Reviewed-on: https://gerrit.mot.com/1274600
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Seungyoon Lee <yoon@motorola.com>
Submit-Approved: Jira Key
---
 sound/soc/codecs/cs35l41-i2c.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/sound/soc/codecs/cs35l41-i2c.c b/sound/soc/codecs/cs35l41-i2c.c
index 2f4422a58af6..cb1e13995315 100644
--- a/sound/soc/codecs/cs35l41-i2c.c
+++ b/sound/soc/codecs/cs35l41-i2c.c
@@ -55,6 +55,35 @@ static const struct i2c_device_id cs35l41_id_i2c[] = {
 
 MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
 
+static ssize_t gpio_status_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	u32 int_status = 0;
+	struct cs35l41_private *cs35l41 = dev_get_drvdata(dev);
+
+	if (cs35l41 != NULL)
+	{
+		regmap_read(cs35l41->regmap, CS35L41_GPIO_STATUS1, &int_status);
+		dev_err(cs35l41->dev, "gpio_status_show read regmap:%d\n", int_status);
+	}
+	else
+	{
+		dev_err(cs35l41->dev, "gpio_status_show cs35l41 not init\n");
+	}
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", int_status);
+}
+
+static DEVICE_ATTR(gpio_status, S_IRUGO, gpio_status_show, NULL);
+
+static struct attribute *gpio_status_attrs[] = {
+	&dev_attr_gpio_status.attr,
+	NULL,
+};
+
+static struct attribute_group gpio_status_attr_group = {
+	.attrs = gpio_status_attrs,
+};
+
 static int cs35l41_i2c_probe(struct i2c_client *client,
 				const struct i2c_device_id *id)
 {
@@ -82,6 +111,10 @@ static int cs35l41_i2c_probe(struct i2c_client *client,
 		return ret;
 	}
 
+	ret = sysfs_create_group(&cs35l41->dev->kobj, &gpio_status_attr_group);
+	if (ret < 0)
+		dev_err(cs35l41->dev, "sysfs group creation failed, ret = %d\n", ret);
+
 	return cs35l41_probe(cs35l41, pdata);
 }