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Merge branch 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

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Pull i2c fixes from Wolfram Sang:
 "A bunch of driver bugfixes and a MAINTAINERS addition"

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  MAINTAINERS: add entry for STM32 I2C driver
  i2c: viperboard: return message count on master_xfer success
  i2c: pmcmsp: fix error return from master_xfer
  i2c: pmcmsp: return message count on master_xfer success
  i2c: designware: fix poll-after-enable regression
  eeprom: at24: fix retrieving the at24_chip_data structure
  i2c: core: ACPI: Log device not acking errors at dbg loglevel
  i2c: core: ACPI: Improve OpRegion read errors
This commit is contained in:
Linus Torvalds 2018-05-18 18:02:01 -07:00
commit 6d16db0093
6 changed files with 24 additions and 8 deletions
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6
MAINTAINERS
View File

@ -13264,6 +13264,12 @@ M: Jan-Benedict Glaw <jbglaw@lug-owl.de>
S: Maintained
F: arch/alpha/kernel/srm_env.c
ST STM32 I2C/SMBUS DRIVER
M: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
L: linux-i2c@vger.kernel.org
S: Maintained
F: drivers/i2c/busses/i2c-stm32*
STABLE BRANCH
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
L: stable@vger.kernel.org

5
drivers/i2c/busses/i2c-designware-master.c
View File

@ -209,7 +209,10 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev)
i2c_dw_disable_int(dev);
/* Enable the adapter */
__i2c_dw_enable_and_wait(dev, true);
__i2c_dw_enable(dev, true);
/* Dummy read to avoid the register getting stuck on Bay Trail */
dw_readl(dev, DW_IC_ENABLE_STATUS);
/* Clear and enable interrupts */
dw_readl(dev, DW_IC_CLR_INTR);

4
drivers/i2c/busses/i2c-pmcmsp.c
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@ -564,10 +564,10 @@ static int pmcmsptwi_master_xfer(struct i2c_adapter *adap,
* TODO: We could potentially loop and retry in the case
* of MSP_TWI_XFER_TIMEOUT.
*/
return -1;
return -EIO;
}
return 0;
return num;
}
static u32 pmcmsptwi_i2c_func(struct i2c_adapter *adapter)

2
drivers/i2c/busses/i2c-viperboard.c
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@ -337,7 +337,7 @@ static int vprbrd_i2c_xfer(struct i2c_adapter *i2c, struct i2c_msg *msgs,
}
mutex_unlock(&vb->lock);
}
return 0;
return num;
error:
mutex_unlock(&vb->lock);
return error;

11
drivers/i2c/i2c-core-acpi.c
View File

@ -445,10 +445,17 @@ static int acpi_gsb_i2c_read_bytes(struct i2c_client *client,
msgs[1].buf = buffer;
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0)
dev_err(&client->adapter->dev, "i2c read failed\n");
if (ret < 0) {
/* Getting a NACK is unfortunately normal with some DSTDs */
if (ret == -EREMOTEIO)
dev_dbg(&client->adapter->dev, "i2c read %d bytes from client@%#x starting at reg %#x failed, error: %d\n",
data_len, client->addr, cmd, ret);
else
dev_err(&client->adapter->dev, "i2c read %d bytes from client@%#x starting at reg %#x failed, error: %d\n",
data_len, client->addr, cmd, ret);
} else {
memcpy(data, buffer, data_len);
}
kfree(buffer);
return ret;

2
drivers/misc/eeprom/at24.c
View File

@ -518,7 +518,7 @@ static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata)
if (of_node && of_match_device(at24_of_match, dev))
cdata = of_device_get_match_data(dev);
else if (id)
cdata = (void *)&id->driver_data;
cdata = (void *)id->driver_data;
else
cdata = acpi_device_get_match_data(dev);