From: Gene Chen <redacted>

Fix flow which is used to check ic exist

Signed-off-by: Gene Chen <redacted>
---
  drivers/mfd/mt6360-core.c  | 28 +++++++++++++++++++---------
  include/linux/mfd/mt6360.h |  8 ++++----
  2 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/drivers/mfd/mt6360-core.c b/drivers/mfd/mt6360-core.c
index 2dd5918..4bb2949 100644
--- a/drivers/mfd/mt6360-core.c
+++ b/drivers/mfd/mt6360-core.c

@@ -293,6 +293,23 @@ static const struct mfd_cell mt6360_devs[] = {
  		    NULL, 0, 0, "mediatek,mt6360-tcpc"),
  };
  
+static int mt6360_check_vendor_info(struct mt6360_data *data)
+{
+	u32 info;
+	int ret;
+
+	ret = regmap_read(data->regmap, MT6360_REG_PMU_DEVINFO, &info);
+	if (ret < 0)
+		return ret;
+
+	if ((info & MT6360_CHIPVEN_MASK) != MT6360_CHIPVEN_VAL)
+		return -ENODEV;
+
+	data->chip_rev = info & MT6360_CHIPREV_MASK;
+
+	return 0;
+}
+
  static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] = {
  	MT6360_PMU_SLAVEID,
  	MT6360_PMIC_SLAVEID,

@@ -303,7 +320,6 @@ static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] = {
  static int mt6360_probe(struct i2c_client *client)
  {
  	struct mt6360_data *data;
-	unsigned int reg_data;
  	int i, ret;
  
  	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);

@@ -319,16 +335,10 @@ static int mt6360_probe(struct i2c_client *client)
  		return PTR_ERR(data->regmap);
  	}
  
-	ret = regmap_read(data->regmap, MT6360_PMU_DEV_INFO, &reg_data);
+	ret = mt6360_check_vendor_info(data);
  	if (ret) {
-		dev_err(&client->dev, "Device not found\n");
-		return ret;
-	}
-
-	data->chip_rev = reg_data & CHIP_REV_MASK;
-	if (data->chip_rev != CHIP_VEN_MT6360) {

  		dev_err(&client->dev, "Device not supported\n");
-		return -ENODEV;
+		return ret;
  	}
  
  	ret = devm_regmap_add_irq_chip(&client->dev, data->regmap, client->irq,

diff --git a/include/linux/mfd/mt6360.h b/include/linux/mfd/mt6360.h
index 9fc6718..5ec0f5d 100644
--- a/include/linux/mfd/mt6360.h
+++ b/include/linux/mfd/mt6360.h

@@ -30,7 +30,7 @@ struct mt6360_data {
  };
  
  /* PMU register defininition */
-#define MT6360_PMU_DEV_INFO			(0x00)
+#define MT6360_REG_PMU_DEVINFO			(0x00)
  #define MT6360_PMU_CORE_CTRL1			(0x01)
  #define MT6360_PMU_RST1				(0x02)
  #define MT6360_PMU_CRCEN			(0x03)

@@ -233,8 +233,8 @@ struct mt6360_data {
  #define MT6360_IRQ_REGNUM	16
  #define MT6360_IRQ_RETRIG	BIT(2)
  
-#define CHIP_VEN_MASK				(0xF0)
-#define CHIP_VEN_MT6360				(0x50)
-#define CHIP_REV_MASK				(0x0F)
+#define MT6360_CHIPVEN_MASK			(0xF0)
+#define MT6360_CHIPVEN_VAL			(0x50)
+#define MT6360_CHIPREV_MASK			(0x0F)