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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-07-30 02:05:25 -0400
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-08-11 13:14:12 -0400
commit3a2805e845761ea76a6ad5688d637b2624de0cab (patch)
treecef5521d2223fe2ab9a686699c52a4c2c6d045f2 /drivers/hwmon/pmbus
parent044cd3a574be5cd97ab80d0c6d06f5fab327541d (diff)
hwmon: (pmbus/lm25066) Ignore byte writes to non-zero pages
pmbus_clear_faults() attempts to clear faults on non-existing real pages. As a result, the command error bit in the status register is set, and faults are not really cleared. All byte writes to non-zero pages are requests to clear the status register on that page. Since non-zero pages are virtual and do not exist on the chip, there is nothing to do, and such requests have to be ignored. This fixes above problem. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Diffstat (limited to 'drivers/hwmon/pmbus')
-rw-r--r--drivers/hwmon/pmbus/lm25066.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
index d4bc114572de..ac254fba551b 100644
--- a/drivers/hwmon/pmbus/lm25066.c
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -161,6 +161,17 @@ static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
161 return ret; 161 return ret;
162} 162}
163 163
164static int lm25066_write_byte(struct i2c_client *client, int page, u8 value)
165{
166 if (page > 1)
167 return -EINVAL;
168
169 if (page == 0)
170 return pmbus_write_byte(client, 0, value);
171
172 return 0;
173}
174
164static int lm25066_probe(struct i2c_client *client, 175static int lm25066_probe(struct i2c_client *client,
165 const struct i2c_device_id *id) 176 const struct i2c_device_id *id)
166{ 177{
@@ -204,6 +215,7 @@ static int lm25066_probe(struct i2c_client *client,
204 215
205 info->read_word_data = lm25066_read_word_data; 216 info->read_word_data = lm25066_read_word_data;
206 info->write_word_data = lm25066_write_word_data; 217 info->write_word_data = lm25066_write_word_data;
218 info->write_byte = lm25066_write_byte;
207 219
208 switch (id->driver_data) { 220 switch (id->driver_data) {
209 case lm25066: 221 case lm25066: