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i2c-i801: More explicit names for chip features

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Use separate flags with explicit names to describe the features of
the ICH chip.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2008-01-27 18:14:50 +01:00 committed by Jean Delvare
parent ae7b0497b8
commit 369f6f4aec
1 changed files with 15 additions and 9 deletions
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24
drivers/i2c/busses/i2c-i801.c
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@ -122,7 +122,12 @@ static unsigned long i801_smba;
static unsigned char i801_original_hstcfg;
static struct pci_driver i801_driver;
static struct pci_dev *I801_dev;
static int isich4;
#define FEATURE_SMBUS_PEC (1 << 0)
#define FEATURE_BLOCK_BUFFER (1 << 1)
#define FEATURE_BLOCK_PROC (1 << 2)
#define FEATURE_I2C_BLOCK_READ (1 << 3)
static unsigned int i801_features;
static int i801_transaction(int xact)
{
@ -409,7 +414,8 @@ static int i801_block_transaction(union i2c_smbus_data *data, char read_write,
data->block[0] = 32; /* max for reads */
}
if (isich4 && i801_set_block_buffer_mode() == 0 )
if ((i801_features & FEATURE_BLOCK_BUFFER)
&& i801_set_block_buffer_mode() == 0)
result = i801_block_transaction_by_block(data, read_write,
hwpec);
else
@ -435,7 +441,7 @@ static s32 i801_access(struct i2c_adapter * adap, u16 addr,
int block = 0;
int ret, xact = 0;
hwpec = isich4 && (flags & I2C_CLIENT_PEC)
hwpec = (i801_features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
&& size != I2C_SMBUS_QUICK
&& size != I2C_SMBUS_I2C_BLOCK_DATA;
@ -523,9 +529,9 @@ static s32 i801_access(struct i2c_adapter * adap, u16 addr,
static u32 i801_func(struct i2c_adapter *adapter)
{
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
| (isich4 ? I2C_FUNC_SMBUS_PEC : 0);
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK |
((i801_features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0);
}
static const struct i2c_algorithm smbus_algorithm = {
@ -565,6 +571,7 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id
int err;
I801_dev = dev;
i801_features = 0;
switch (dev->device) {
case PCI_DEVICE_ID_INTEL_82801DB_3:
case PCI_DEVICE_ID_INTEL_82801EB_3:
@ -575,10 +582,9 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id
case PCI_DEVICE_ID_INTEL_ICH8_5:
case PCI_DEVICE_ID_INTEL_ICH9_6:
case PCI_DEVICE_ID_INTEL_TOLAPAI_1:
isich4 = 1;
i801_features |= FEATURE_SMBUS_PEC;
i801_features |= FEATURE_BLOCK_BUFFER;
break;
default:
isich4 = 0;
}
err = pci_enable_device(dev);