From ae15a012302d62edecab8d051fed33c0570385d5 Mon Sep 17 00:00:00 2001
From: Guochun Huang <hero.huang@rock-chips.com>
Date: Fri, 21 Apr 2023 01:31:11 +0000
Subject: [PATCH] mfd: max96755f: Add patgen_mode debug node

Enable pattern:
echo 2 > /sys/bus/i2c/devices/x-0040/patgen_mode

Disable pattern:
echo 0 > /sys/bus/i2c/devices/x-0040/patgen_mode

Change-Id: I5bf970210b14f93599a36c78703e53252546da5b
Signed-off-by: Guochun Huang <hero.huang@rock-chips.com>
---
 drivers/mfd/max96755f.c       | 20 ++++++++++++++++++++
 include/linux/mfd/max96755f.h |  3 +++
 2 files changed, 23 insertions(+)

diff --git a/drivers/mfd/max96755f.c b/drivers/mfd/max96755f.c
index 6b7b10339ecf..eef5ef2f1ff5 100644
--- a/drivers/mfd/max96755f.c
+++ b/drivers/mfd/max96755f.c
@@ -195,8 +195,28 @@ static ssize_t line_fault_monitor_show(struct device *device,
 
 static DEVICE_ATTR_RO(line_fault_monitor);
 
+static ssize_t patgen_mode_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	struct max96755f *max96755f = dev_get_drvdata(dev);
+	u8 patgen_mode;
+	int ret;
+
+	ret = kstrtou8(buf, 0, &patgen_mode);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(max96755f->regmap, 0x01e5, PATGEN_MODE,
+			   FIELD_PREP(PATGEN_MODE, patgen_mode));
+
+	return count;
+}
+static DEVICE_ATTR_WO(patgen_mode);
+
 static struct attribute *max96755f_attrs[] = {
 	&dev_attr_line_fault_monitor.attr,
+	&dev_attr_patgen_mode.attr,
 	NULL
 };
 
diff --git a/include/linux/mfd/max96755f.h b/include/linux/mfd/max96755f.h
index 74b0fff0d24e..eae6da60f66f 100644
--- a/include/linux/mfd/max96755f.h
+++ b/include/linux/mfd/max96755f.h
@@ -79,6 +79,9 @@
 /* 0170h */
 #define SPI_EN			BIT(0)
 
+/* 01e5h */
+#define PATGEN_MODE		GENMASK(1, 0)
+
 /* 02beh */
 #define RES_CFG			BIT(7)
 #define TX_PRIO			BIT(6)