As kind is now hard-coded to -1, there is room for code clean-ups.
Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
---
The patch looks large, but most of it is really only removing one
depth of indentation.
drivers/hwmon/w83781d.c | 131 +++++++++++++++++++----------------------------
1 file changed, 53 insertions(+), 78 deletions(-)
--- linux-2.6.32-rc3.orig/drivers/hwmon/w83781d.c 2009-10-06 10:33:15.000000000 +0200
+++ linux-2.6.32-rc3/drivers/hwmon/w83781d.c 2009-10-06 11:55:34.000000000 +0200
@@ -1054,11 +1054,11 @@ static int
w83781d_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info)
{
- int val1 = 0, val2;
+ int val1, val2;
struct w83781d_data *isa = w83781d_data_if_isa();
struct i2c_adapter *adapter = client->adapter;
int address = client->addr;
- const char *client_name = "";
+ const char *client_name;
enum vendor { winbond, asus } vendid;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
@@ -1070,98 +1070,73 @@ w83781d_detect(struct i2c_client *client
if (isa)
mutex_lock(&isa->update_lock);
- /* The w8378?d may be stuck in some other bank than bank 0. This may
- make reading other information impossible. Specify a force=... or
- force_*=... parameter, and the Winbond will be reset to the right
- bank. */
- if (kind < 0) {
- if (i2c_smbus_read_byte_data
- (client, W83781D_REG_CONFIG) & 0x80) {
- dev_dbg(&adapter->dev, "Detection of w83781d chip "
- "failed at step 3\n");
- goto err_nodev;
- }
- val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
- val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
- /* Check for Winbond or Asus ID if in bank 0 */
- if ((!(val1 & 0x07)) &&
- (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3))
- || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) {
- dev_dbg(&adapter->dev, "Detection of w83781d chip "
- "failed at step 4\n");
+ if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
+ dev_dbg(&adapter->dev,
+ "Detection of w83781d chip failed at step 3\n");
+ goto err_nodev;
+ }
+
+ val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
+ val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
+ /* Check for Winbond or Asus ID if in bank 0 */
+ if (!(val1 & 0x07) &&
+ ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
+ ( (val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
+ dev_dbg(&adapter->dev,
+ "Detection of w83781d chip failed at step 4\n");
+ goto err_nodev;
+ }
+ /* If Winbond SMBus, check address at 0x48.
+ Asus doesn't support, except for as99127f rev.2 */
+ if ((!(val1 & 0x80) && val2 == 0xa3) ||
+ ( (val1 & 0x80) && val2 == 0x5c)) {
+ if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
+ != address) {
+ dev_dbg(&adapter->dev,
+ "Detection of w83781d chip failed at step 5\n");
goto err_nodev;
}
- /* If Winbond SMBus, check address at 0x48.
- Asus doesn't support, except for as99127f rev.2 */
- if ((!(val1 & 0x80) && (val2 == 0xa3)) ||
- ((val1 & 0x80) && (val2 == 0x5c))) {
- if (i2c_smbus_read_byte_data
- (client, W83781D_REG_I2C_ADDR) != address) {
- dev_dbg(&adapter->dev, "Detection of w83781d "
- "chip failed at step 5\n");
- goto err_nodev;
- }
- }
}
- /* We have either had a force parameter, or we have already detected the
- Winbond. Put it now into bank 0 and Vendor ID High Byte */
+ /* Put it now into bank 0 and Vendor ID High Byte */
i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
(i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
& 0x78) | 0x80);
- /* Determine the chip type. */
- if (kind <= 0) {
- /* get vendor ID */
- val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
- if (val2 == 0x5c)
- vendid = winbond;
- else if (val2 == 0x12)
- vendid = asus;
- else {
- dev_dbg(&adapter->dev, "w83781d chip vendor is "
- "neither Winbond nor Asus\n");
- goto err_nodev;
- }
-
- val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
- if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
- kind = w83781d;
- else if (val1 == 0x30 && vendid == winbond)
- kind = w83782d;
- else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
- kind = w83783s;
- else if (val1 == 0x31)
- kind = as99127f;
- else {
- if (kind == 0)
- dev_warn(&adapter->dev, "Ignoring 'force' "
- "parameter for unknown chip at "
- "address 0x%02x\n", address);
- goto err_nodev;
- }
-
- if ((kind == w83781d || kind == w83782d)
- && w83781d_alias_detect(client, val1)) {
- dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
- "be the same as ISA device\n", address);
- goto err_nodev;
- }
+ /* Get the vendor ID */
+ val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
+ if (val2 == 0x5c)
+ vendid = winbond;
+ else if (val2 == 0x12)
+ vendid = asus;
+ else {
+ dev_dbg(&adapter->dev,
+ "w83781d chip vendor is neither Winbond nor Asus\n");
+ goto err_nodev;
}
- if (isa)
- mutex_unlock(&isa->update_lock);
-
- if (kind == w83781d) {
+ /* Determine the chip type. */
+ val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
+ if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
client_name = "w83781d";
- } else if (kind == w83782d) {
+ else if (val1 == 0x30 && vendid == winbond)
client_name = "w83782d";
- } else if (kind == w83783s) {
+ else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
client_name = "w83783s";
- } else if (kind == as99127f) {
+ else if (val1 == 0x31)
client_name = "as99127f";
+ else
+ goto err_nodev;
+
+ if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
+ dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
+ "be the same as ISA device\n", address);
+ goto err_nodev;
}
+ if (isa)
+ mutex_unlock(&isa->update_lock);
+
strlcpy(info->type, client_name, I2C_NAME_SIZE);
return 0;
--
Jean Delvare
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