Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932153Ab3HGGSg (ORCPT ); Wed, 7 Aug 2013 02:18:36 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:17554 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932085Ab3HGGSb (ORCPT ); Wed, 7 Aug 2013 02:18:31 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Tue, 06 Aug 2013 23:16:49 -0700 From: Wei Ni To: CC: , , , , Wei Ni Subject: [PATCH v4 1/3] hwmon: (lm90) Define status bits Date: Wed, 7 Aug 2013 14:18:24 +0800 Message-ID: <1375856306-14415-2-git-send-email-wni@nvidia.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1375856306-14415-1-git-send-email-wni@nvidia.com> References: <1375856306-14415-1-git-send-email-wni@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4520 Lines: 130 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 --- 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)) { /* * 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); + 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"); } } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/