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SubjectRe: [PATCH v4 1/3] hwmon: (lm90) Define status bits
On 10/31/2013 10:47 AM, Wei Ni wrote:
> On 10/30/2013 11:41 PM, Jean Delvare wrote:
>> Hi Wei,
>>
>> On Wed, 7 Aug 2013 14:18:24 +0800, Wei Ni wrote:
>>> Add bit defines for the status register. And add a function
>>> lm90_is_tripped() which will read status register and return
>>> tripped or not, then lm90_alert can call it directly, and in the
>>> future the IRQ thread also can use it.
>>>
>>> Signed-off-by: Wei Ni <wni@nvidia.com>
>>> ---
>>> drivers/hwmon/lm90.c | 75 +++++++++++++++++++++++++++++++++-----------------
>>> 1 file changed, 50 insertions(+), 25 deletions(-)
>>>
>>> diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
>>> index cdff742..1da2eff 100644
>>> --- a/drivers/hwmon/lm90.c
>>> +++ b/drivers/hwmon/lm90.c
>>> @@ -179,6 +179,18 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
>>> #define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
>>> #define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
>>>
>>> +/* LM90 status */
>>> +#define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
>>> +#define LM90_STATUS_RTHRM (1 << 1) /* remote THERM limit tripped */
>>> +#define LM90_STATUS_OPEN (1 << 2) /* remote is an open circuit */
>>> +#define LM90_STATUS_RLOW (1 << 3) /* remote low temp limit tripped */
>>> +#define LM90_STATUS_RHIGH (1 << 4) /* remote high temp limit tripped */
>>> +#define LM90_STATUS_LLOW (1 << 5) /* local low temp limit tripped */
>>> +#define LM90_STATUS_LHIGH (1 << 6) /* local high temp limit tripped */
>>> +
>>> +#define MAX6696_STATUS2_RLOW (1 << 3) /* remote2 low temp limit tripped */
>>> +#define MAX6696_STATUS2_RHIGH (1 << 4) /* remote2 high temp limit tripped */
>>> +
>>> /*
>>> * Driver data (common to all clients)
>>> */
>>> @@ -1391,6 +1403,36 @@ static void lm90_init_client(struct i2c_client *client)
>>> i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
>>> }
>>>
>>> +static bool lm90_is_tripped(struct i2c_client *client)
>>> +{
>>> + struct lm90_data *data = i2c_get_clientdata(client);
>>> + u8 status, status2 = 0;
>>> +
>>> + lm90_read_reg(client, LM90_REG_R_STATUS, &status);
>>> +
>>> + if (data->kind == max6696)
>>> + lm90_read_reg(client, MAX6696_REG_R_STATUS2, &status2);
>>> +
>>> + if ((status & 0x7f) == 0 && (status2 & 0xfe) == 0)
>>> + return false;
>>> +
>>> + if (status & (LM90_STATUS_LLOW | LM90_STATUS_LHIGH | LM90_STATUS_LTHRM))
>>> + dev_warn(&client->dev,
>>> + "temp%d out of range, please check!\n", 1);
>>> + if (status & (LM90_STATUS_RLOW | LM90_STATUS_RHIGH | LM90_STATUS_RTHRM))
>>> + dev_warn(&client->dev,
>>> + "temp%d out of range, please check!\n", 2);
>>> + if (status & LM90_STATUS_OPEN)
>>> + dev_warn(&client->dev,
>>> + "temp%d diode open, please check!\n", 2);
>>> +
>>> + if (status2 & (MAX6696_STATUS2_RLOW | MAX6696_STATUS2_RHIGH))
>>> + dev_warn(&client->dev,
>>> + "temp%d out of range, please check!\n", 3);
>>> +
>>> + return true;
>>> +}
>>> +
>>> static int lm90_probe(struct i2c_client *client,
>>> const struct i2c_device_id *id)
>>> {
>>> @@ -1489,36 +1531,17 @@ static int lm90_remove(struct i2c_client *client)
>>>
>>> static void lm90_alert(struct i2c_client *client, unsigned int flag)
>>> {
>>> - struct lm90_data *data = i2c_get_clientdata(client);
>>> - u8 config, alarms, alarms2 = 0;
>>> -
>>> - lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
>>> -
>>> - if (data->kind == max6696)
>>> - lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2);
>>> -
>>> - if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
>>> - dev_info(&client->dev, "Everything OK\n");
>>> - } else {
>>> - if (alarms & 0x61)
>>> - dev_warn(&client->dev,
>>> - "temp%d out of range, please check!\n", 1);
>>> - if (alarms & 0x1a)
>>> - dev_warn(&client->dev,
>>> - "temp%d out of range, please check!\n", 2);
>>> - if (alarms & 0x04)
>>> - dev_warn(&client->dev,
>>> - "temp%d diode open, please check!\n", 2);
>>> -
>>> - if (alarms2 & 0x18)
>>> - dev_warn(&client->dev,
>>> - "temp%d out of range, please check!\n", 3);
>>> -
>>> + if (lm90_is_tripped(client)) {
>>
>> You are reading LM90_REG_R_STATUS here...
>>
>>> /*
>>> * Disable ALERT# output, because these chips don't implement
>>> * SMBus alert correctly; they should only hold the alert line
>>> * low briefly.
>>> */
>>> + struct lm90_data *data = i2c_get_clientdata(client);
>>> + u8 config, alarms;
>>> +
>>> + lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
>>
>> ... and here again. I already complained about this in my previous
>> review of this patch, and you were supposed to address it, but you did
>> not. As a result I am still not happy with this patch and I can't apply
>> it, sorry.
>
> It's so sorry, I made a mistake, I sent a old patch for this. I will
> sent the right one right now.
> Sorry again.

Hi, Jean

I resend this patch:
[PATCH RESEND v4 1/3] hwmon: (lm90) Define status bits
Please review it.

Thanks.
Wei.

>
> Wei.
>
>>
>>> +
>>> if ((data->flags & LM90_HAVE_BROKEN_ALERT)
>>> && (alarms & data->alert_alarms)) {
>>> dev_dbg(&client->dev, "Disabling ALERT#\n");
>>> @@ -1526,6 +1549,8 @@ static void lm90_alert(struct i2c_client *client, unsigned int flag)
>>> i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
>>> config | 0x80);
>>> }
>>> + } else {
>>> + dev_info(&client->dev, "Everything OK\n");
>>> }
>>> }
>>>
>>
>
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