mutex_unlock(&state->lock);
}
+static int attiny_i2c_read(struct i2c_client *client, u8 reg, unsigned int *buf)
+{
+ struct i2c_msg msgs[1];
+ u8 addr_buf[1] = { reg };
+ u8 data_buf[1] = { 0, };
+ int ret;
+
+ /* Write register address */
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = ARRAY_SIZE(addr_buf);
+ msgs[0].buf = addr_buf;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs))
+ return -EIO;
+
+ usleep_range(5000, 10000);
+
+ /* Read data from register */
+ msgs[0].addr = client->addr;
+ msgs[0].flags = I2C_M_RD;
+ msgs[0].len = 1;
+ msgs[0].buf = data_buf;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs))
+ return -EIO;
+
+ *buf = data_buf[0];
+ return 0;
+}
+
/*
* I2C driver interface functions
*/
goto error;
}
- ret = regmap_read(regmap, REG_ID, &data);
+ ret = attiny_i2c_read(i2c, REG_ID, &data);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read REG_ID reg: %d\n", ret);
goto error;