From patchwork Fri Oct 25 06:34:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Hilliard X-Patchwork-Id: 839829 Received: from mail-io1-f51.google.com (mail-io1-f51.google.com [209.85.166.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BEBFB18DF85; Fri, 25 Oct 2024 06:34:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729838096; cv=none; b=A4kK8UDJk/6/lzW62c3cU2rM0qeIc3k2RUABzHiLPaxLJS3LNMeOJxanQZx3Vlv5dYEVvk439XgDe1EvEyJBOb2BSRzV0yd68J9N42iGK6d8t6hlgvilhEfaBrWRgX1Y9AqHAmsETBpwnJUlJjTghP0ExVyii6vf5k4WTEWvCxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729838096; c=relaxed/simple; bh=M/+x2mpWZr7PBV9kF6t/mireJ1mJlWQCgAnedpEA9bk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=EGkKiYcOwLGC/o9WjOWtUwENHPDaCm4K+TPh/DgDjpT17J+QGnGZe5UEdVwOkXVFy1Ekh44QPGOgdTJE1Y0SlDOvyT1SaCwnrYd4bLgimOSQ/ERRyTWfTEgOUCLeEWeO5SiXV5FXnmhLfFuXEv91AKxBaa7C3W2btpm/7abykcE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=es4JsFK9; arc=none smtp.client-ip=209.85.166.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="es4JsFK9" Received: by mail-io1-f51.google.com with SMTP id ca18e2360f4ac-83ab694ebe5so67985939f.0; Thu, 24 Oct 2024 23:34:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729838093; x=1730442893; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=XWYBRj6CmYkNb42zlkk4hhoqwzra4+EVY46cpjPSL4o=; b=es4JsFK9e2gBBNm6hJoNvJpvf2kMglxUfmHq/5Uckc6blY0eRxk/u2TnG0/ubJCY0x O9mcw/uClotqR6tFIYPscY5RfNyGIREqAMTLn25Zcw+7cgMCAJKuVLHMfpxsX20gCmc3 1RWlty0bOpy6WYy38yVxcY9C6MpvNDlCzzvH1bh97wbSiKmP73b68DiswhgrHyyyCe41 D+zxz5AT511N8hYPjvlum0t42DIMGebBGb1/pib7JNVyHldPm75CGGsp0WRoUq0AoR2R nn2LQ39veklTmRNHhXTo8nE3bYo+Xop3guGaLRW4vFItAqCZd6gE+99s7ehjVLx2jmWi B3tg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729838093; x=1730442893; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=XWYBRj6CmYkNb42zlkk4hhoqwzra4+EVY46cpjPSL4o=; b=cCvqNQ5BEW/Kc8QzvI5abQxY8Fbo5f3tlvivfDD03f/8YG9hBCrKzi7CEcuBNf4wn8 WZKWzN3kK0C9x/rXm9JWZaRobdj+0NkOBGp4+xeMbNgtawiLC0rZROVcnnUI8BGfG6Fl tUAgBpn3K4Y+akyr9ikxUWqXThKFKivGnzV5b/sjvCUzbVjsxEUGssrpX3cEq6vCsnUO 6G0OLsqGgPD1ihdEG629hdNkHXuJ/SLX/BygOPffv+B32mSfwzq4EQ4Xp7Mz3fbjQJtV J2Hk44HLn0b+/DupM9acR3kZ/g7RmUOnhQ7ULLwno83EieYm1iC8c9ih9JRpXC935pBI Femw== X-Forwarded-Encrypted: i=1; AJvYcCUoC9XumpEWZ4fleJXrFLrhl0EsbUPfxnGPT06jdWZukOYKsY9FSi9D7jGi4dV2KimBKAXhMAtpwc3HguU=@vger.kernel.org X-Gm-Message-State: AOJu0Yy505ro2LFqP4C7kye+BE292BZIT+8q3mdbqnVpIrqQzvwFfsJB T1O7BAmsX9GpFcd7bvDp+3GffpefMPVc0qiap/0emynWJcHgGEQrBw/M5w== X-Google-Smtp-Source: AGHT+IGh1Va6/7C51TeNjaOekWAVBiwKThLFEX1TZYMT0N26+Q39IC98A2k4YsqYgpY3J5CNtkrknA== X-Received: by 2002:a05:6602:14c6:b0:82a:2a67:9429 with SMTP id ca18e2360f4ac-83b0401bc85mr535279939f.5.1729838093543; Thu, 24 Oct 2024 23:34:53 -0700 (PDT) Received: from james-x399.localdomain (97-118-131-57.hlrn.qwest.net. [97.118.131.57]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-83b13804ec6sm9807139f.32.2024.10.24.23.34.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Oct 2024 23:34:52 -0700 (PDT) From: James Hilliard To: linux-watchdog@vger.kernel.org Cc: James Hilliard , Guenter Roeck , Wim Van Sebroeck , linux-kernel@vger.kernel.org Subject: [PATCH v4] watchdog: it87_wdt: add PWRGD enable quirk for Qotom QCML04 Date: Fri, 25 Oct 2024 00:34:40 -0600 Message-Id: <20241025063441.3494837-1-james.hilliard1@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-watchdog@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 For the watchdog timer to work properly on the QCML04 board we need to set PWRGD enable in the Environment Controller Configuration Registers Special Configuration Register 1 when it is not already set, this may be the case when the watchdog is not enabled from within the BIOS. Signed-off-by: James Hilliard Reviewed-by: Guenter Roeck --- Changes v3 -> v4: - NULL terminate it87_quirks table Changes v2 -> v3: - add linux/bits.h header - check for quirks on all it87 chips Changes v1 -> v2: - remove QGLK02/IT87_WDT_BROKEN --- drivers/watchdog/it87_wdt.c | 39 +++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c index 3e8c15138edd..1a5a0a2c3f2e 100644 --- a/drivers/watchdog/it87_wdt.c +++ b/drivers/watchdog/it87_wdt.c @@ -20,6 +20,8 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include +#include #include #include #include @@ -40,6 +42,7 @@ #define VAL 0x2f /* Logical device Numbers LDN */ +#define EC 0x04 #define GPIO 0x07 /* Configuration Registers and Functions */ @@ -73,6 +76,12 @@ #define IT8784_ID 0x8784 #define IT8786_ID 0x8786 +/* Environment Controller Configuration Registers LDN=0x04 */ +#define SCR1 0xfa + +/* Environment Controller Bits SCR1 */ +#define WDT_PWRGD 0x20 + /* GPIO Configuration Registers LDN=0x07 */ #define WDTCTRL 0x71 #define WDTCFG 0x72 @@ -240,6 +249,21 @@ static int wdt_set_timeout(struct watchdog_device *wdd, unsigned int t) return ret; } +enum { + IT87_WDT_OUTPUT_THROUGH_PWRGD = BIT(0), +}; + +static const struct dmi_system_id it87_quirks[] = { + { + /* Qotom Q30900P (IT8786) */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_NAME, "QCML04"), + }, + .driver_data = (void *)IT87_WDT_OUTPUT_THROUGH_PWRGD, + }, + {} +}; + static const struct watchdog_info ident = { .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING, .firmware_version = 1, @@ -261,8 +285,10 @@ static struct watchdog_device wdt_dev = { static int __init it87_wdt_init(void) { + const struct dmi_system_id *dmi_id; u8 chip_rev; u8 ctrl; + int quirks = 0; int rc; rc = superio_enter(); @@ -273,6 +299,10 @@ static int __init it87_wdt_init(void) chip_rev = superio_inb(CHIPREV) & 0x0f; superio_exit(); + dmi_id = dmi_first_match(it87_quirks); + if (dmi_id) + quirks = (long)dmi_id->driver_data; + switch (chip_type) { case IT8702_ID: max_units = 255; @@ -333,6 +363,15 @@ static int __init it87_wdt_init(void) superio_outb(0x00, WDTCTRL); } + if (quirks & IT87_WDT_OUTPUT_THROUGH_PWRGD) { + superio_select(EC); + ctrl = superio_inb(SCR1); + if (!(ctrl & WDT_PWRGD)) { + ctrl |= WDT_PWRGD; + superio_outb(ctrl, SCR1); + } + } + superio_exit(); if (timeout < 1 || timeout > max_units * 60) {