From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D68924799B; Wed, 11 Dec 2024 18:52:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733943137; cv=none; b=VV2FNEOdReCD9y9ip6TrB8z5ay7oIAl66TxFe1lDPrST5cE+ugGhC+73R5pYX3TUmJXHohMG1EwfwoY+edvmM0SAnG6X/v+jOL2sApF9nHGaw+vqnlhYvnYgT8e5+eU797O951N66+PbP4QIA+DEtp/uUbMNmNaA4p223+c0+Gc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733943137; c=relaxed/simple; bh=cMHujGTwR/Y+8zeiO+d9MOKlVyHMMOTiGn/MHw7K/Kg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GHlACVCJl6cpPd0q3AJ9pQZDc/uVxQZChW4UxFNS4uzLND6BxCvHaNu7y6xsPPSD1S4RM2m7R8L0cLG657EZp9ZWEXjYh8a2fOrRvrTWdN0WkA/SEHVAh1fXRoB3o/UBQ7iOLopYvWf/DwhDjKugPTRI02q2aayongRBmRbDs6M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EnLoHd6+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EnLoHd6+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38E62C4CED2; Wed, 11 Dec 2024 18:52:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733943137; bh=cMHujGTwR/Y+8zeiO+d9MOKlVyHMMOTiGn/MHw7K/Kg=; h=From:To:Cc:Subject:Date:From; b=EnLoHd6+vg6kNCXo7K4QwZpTHlX0NLpsUT4/dJ5plVQ1ig7TKr+XXXfmeZOY3R1wH NHjPmyvlD81XFtSJaAb8aTNJZl9ojD1MEe5jsjpAsJPcVc9/mXQ/BOseyrSvMt8Eri q4naOUDfo1Su4rPbbsNJEYnnRbdXXK00GNU27C1CS40T3SL5Pd7WsKgpfWD8PCPD21 l/oDttxfYS6CyXLcl0w4C+OwxTvBBKE1VkEGLEoAKP4PfRB+FNksj98lbudVtLVyj0 Wh59YGYJ977BmptbMF25ZcOfCPYnCtgtXmRRcNyvJqLeAQ/JPffgUzUV2/BLSn79Cg Le1it/891+ItA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Hilliard , Guenter Roeck , Wim Van Sebroeck , Sasha Levin , linux-watchdog@vger.kernel.org Subject: [PATCH AUTOSEL 6.6 01/23] watchdog: it87_wdt: add PWRGD enable quirk for Qotom QCML04 Date: Wed, 11 Dec 2024 13:51:38 -0500 Message-ID: <20241211185214.3841978-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.65 Content-Transfer-Encoding: 8bit From: James Hilliard [ Upstream commit 43439076383a7611300334d1357c0f8883f40816 ] 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 Link: https://lore.kernel.org/r/20241025063441.3494837-1-james.hilliard1@gmail.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck Signed-off-by: Sasha Levin --- 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 843f9f8e39177..239947df613db 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 */ @@ -71,6 +74,12 @@ #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 @@ -233,6 +242,21 @@ 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, @@ -254,8 +278,10 @@ 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(); @@ -266,6 +292,10 @@ 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; @@ -326,6 +356,15 @@ 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) { -- 2.43.0