Use the VERSIONCRC to determine the exact device version. According to
the datasheet this register can be used as device identifier. The
identification is needed since some tps6586x regulators use a different
voltage table.
Signed-off-by: Stefan Agner <ste...@agner.ch>
---
drivers/mfd/tps6586x.c | 41 +++++++++++++++++++++++++++++++++++------
include/linux/mfd/tps6586x.h | 9 +++++++++
2 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index ee61fd7..a3ba9c1 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -124,6 +124,7 @@ struct tps6586x {
struct device *dev;
struct i2c_client *client;
struct regmap *regmap;
+ enum tps6586x_version version;
int irq;
struct irq_chip irq_chip;
@@ -208,6 +209,14 @@ int tps6586x_irq_get_virq(struct device *dev, int irq)
}
EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
+enum tps6586x_version tps6586x_get_version(struct device *dev)
+{
+ struct tps6586x *tps6586x = dev_get_drvdata(dev);
+
+ return tps6586x->version;
+}
+EXPORT_SYMBOL_GPL(tps6586x_get_version);
+
static int __remove_subdev(struct device *dev, void *unused)
{
platform_device_unregister(to_platform_device(dev));
@@ -477,6 +486,7 @@ static int tps6586x_i2c_probe(struct i2c_client *client,
{
struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
struct tps6586x *tps6586x;
+ const char *name = "";
int ret;
if (!pdata && client->dev.of_node)
@@ -487,20 +497,39 @@ static int tps6586x_i2c_probe(struct i2c_client *client,
return -ENOTSUPP;
}
+ tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
+ if (tps6586x == NULL) {
+ dev_err(&client->dev, "memory for tps6586x alloc failed\n");
+ return -ENOMEM;
+ }
+
ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
if (ret < 0) {
dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
return -EIO;
}
- dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
-
- tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
- if (tps6586x == NULL) {
- dev_err(&client->dev, "memory for tps6586x alloc failed\n");
- return -ENOMEM;
+ tps6586x->version = (enum tps6586x_version)ret;
+ switch (ret) {
+ case TPS658621A:
+ name = "TPS658621A";
+ break;
+ case TPS658621CD:
+ name = "TPS658621C/D";
+ break;
+ case TPS658623:
+ name = "TPS658623";
+ break;
+ case TPS658643:
+ name = "TPS658643";
+ break;
+ default:
+ name = "TPS6586X";
+ break;
}
+ dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, ret);
+
tps6586x->client = client;
tps6586x->dev = &client->dev;
i2c_set_clientdata(client, tps6586x);
diff --git a/include/linux/mfd/tps6586x.h b/include/linux/mfd/tps6586x.h
index 8799454..40a36a0 100644
--- a/include/linux/mfd/tps6586x.h
+++ b/include/linux/mfd/tps6586x.h
@@ -62,6 +62,14 @@ enum {
TPS6586X_INT_RTC_ALM2,
};
+enum tps6586x_version {
+ TPS658621A = 0x15,
+ TPS658621CD = 0x2c,
+ TPS658623 = 0x1b,
+ TPS658643 = 0x03,
+ TPS6586X_ANY = -1,
+};
+
struct tps6586x_settings {
int slew_rate;
};
@@ -97,5 +105,6 @@ extern int tps6586x_clr_bits(struct device *dev, int reg,
uint8_t bit_mask);
extern int tps6586x_update(struct device *dev, int reg, uint8_t val,
uint8_t mask);
extern int tps6586x_irq_get_virq(struct device *dev, int irq);
+extern enum tps6586x_version tps6586x_get_version(struct device *dev);
#endif /*__LINUX_MFD_TPS6586X_H */
--
1.8.4.2
--
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