From: Gene Chen <gene.chen.richtek@gmail.com>
To: lee.jones@linaro.org, matthias.bgg@gmail.com
Cc: gene_chen@richtek.com, linux-kernel@vger.kernel.org,
cy_huang@richtek.com, benjamin.chao@mediatek.com,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, shufan_lee@richtek.com
Subject: [PATCH 3/4] mfd: mt6360: Fix flow which is used to check ic exist
Date: Tue, 7 Jul 2020 18:30:55 +0800 [thread overview]
Message-ID: <1594117856-14343-4-git-send-email-gene.chen.richtek@gmail.com> (raw)
In-Reply-To: <1594117856-14343-1-git-send-email-gene.chen.richtek@gmail.com>
From: Gene Chen <gene_chen@richtek.com>
Fix flow which is used to check ic exist
Signed-off-by: Gene Chen <gene_chen@richtek.com>
---
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, ®_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)
#endif /* __MT6360_H__ */
--
2.7.4
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next prev parent reply other threads:[~2020-07-07 10:32 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-07 10:30 [PATCH 0/4] mfd: mt6360: Merge different sub-devices i2c read/write Gene Chen
2020-07-07 10:30 ` [PATCH 1/4] mfd: mt6360: Refactor and fix code style Gene Chen
2020-07-10 14:06 ` Matthias Brugger
2020-07-13 6:51 ` Lee Jones
2020-07-13 10:35 ` Gene Chen
2020-07-13 10:48 ` Lee Jones
2020-07-16 10:12 ` Gene Chen
2020-07-16 13:44 ` Lee Jones
2020-07-07 10:30 ` [PATCH 2/4] mfd: mt6360: Remove handle_post_irq callback function Gene Chen
2020-07-10 14:22 ` Matthias Brugger
2020-07-17 9:35 ` Gene Chen
2020-07-07 10:30 ` Gene Chen [this message]
2020-07-10 14:25 ` [PATCH 3/4] mfd: mt6360: Fix flow which is used to check ic exist Matthias Brugger
2020-07-16 9:53 ` Gene Chen
2020-07-07 10:30 ` [PATCH 4/4] mfd: mt6360: Merge different sub-devices i2c read/write into one regmap Gene Chen
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