From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759918Ab3BZSX7 (ORCPT ); Tue, 26 Feb 2013 13:23:59 -0500 Received: from mail.active-venture.com ([67.228.131.205]:57560 "EHLO mail.active-venture.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759814Ab3BZSXz (ORCPT ); Tue, 26 Feb 2013 13:23:55 -0500 X-Virus-Scan: Scanned by ClamAV 0.97.2 (no viruses); Tue, 26 Feb 2013 12:23:53 -0600 X-Originating-IP: 108.223.40.66 From: Guenter Roeck To: Jean Delvare Cc: lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org, Guenter Roeck Subject: [PATCH v5 06/12] hwmon: (nct6775) Add support for fan debounce module parameter Date: Tue, 26 Feb 2013 10:23:34 -0800 Message-Id: <1361903020-18526-7-git-send-email-linux@roeck-us.net> X-Mailer: git-send-email 1.7.9.7 In-Reply-To: <1361903020-18526-1-git-send-email-linux@roeck-us.net> References: <1361903020-18526-1-git-send-email-linux@roeck-us.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If set, fan debounce is enabled when loading the driver. Signed-off-by: Guenter Roeck --- drivers/hwmon/nct6775.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index 828ed47..ac8be97 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -72,6 +72,10 @@ static unsigned short force_id; module_param(force_id, ushort, 0); MODULE_PARM_DESC(force_id, "Override the detected device ID"); +static unsigned short fan_debounce; +module_param(fan_debounce, ushort, 0); +MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal"); + #define DRVNAME "nct6775" /* @@ -183,6 +187,8 @@ static const u16 NCT6775_REG_IN[] = { #define NCT6775_REG_FANDIV1 0x506 #define NCT6775_REG_FANDIV2 0x507 +#define NCT6775_REG_CR_FAN_DEBOUNCE 0xf0 + static const u16 NCT6775_REG_ALARM[NUM_REG_ALARM] = { 0x459, 0x45A, 0x45B }; /* 0..15 voltages, 16..23 fans, 24..31 temperatures */ @@ -2107,6 +2113,28 @@ static int nct6775_probe(struct platform_device *pdev) */ superio_select(sio_data->sioreg, NCT6775_LD_VID); data->vid = superio_inb(sio_data->sioreg, 0xe3); + + if (fan_debounce) { + u8 tmp; + + superio_select(sio_data->sioreg, NCT6775_LD_HWM); + tmp = superio_inb(sio_data->sioreg, + NCT6775_REG_CR_FAN_DEBOUNCE); + switch (data->kind) { + case nct6775: + tmp |= 0x1e; + break; + case nct6776: + case nct6779: + tmp |= 0x3e; + break; + } + superio_outb(sio_data->sioreg, NCT6775_REG_CR_FAN_DEBOUNCE, + tmp); + dev_info(&pdev->dev, "Enabled fan debounce for chip %s\n", + data->name); + } + superio_exit(sio_data->sioreg); err = device_create_file(dev, &dev_attr_cpu0_vid); -- 1.7.9.7