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 D6EE21CA8F; Mon, 1 Apr 2024 16:03:21 +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=1711987401; cv=none; b=Qk0hug47RaFv9vXdPf0vniuE0ihbMQwEn5sNti9mJAzI1tYOiaGrsL6kDQD2EmWVY8WmPJCOPtyBqonm/yojcfNh3RQ3js4xJC3R8iF8jvEiRp5pyBZHKPfyuGU1pm+5Laai4OkM/FNq8zmHyuYiq5GH8WtqAUidAaIqWFTNYms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711987401; c=relaxed/simple; bh=yPGkQCaBTKWFWCDbSgI0BTW65QK06OBhtc/n7T7YdG8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bXhOpoBzQRflb/4Rnedor9sVokAtuvNhVz5P4fy7x44SSX6QZVCFsSKHyAkofjFSWioByjREiGgoyiWXK76p3uas08giSKs/OG/tUjKyzskTNNQlBBznOc4JinpqubJ47CUvITVCKI0yN6Fvh1iJZKx9ls+B7cZgzJAxp7uyAgI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=HgTqVFse; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="HgTqVFse" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 440CEC433F1; Mon, 1 Apr 2024 16:03:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1711987401; bh=yPGkQCaBTKWFWCDbSgI0BTW65QK06OBhtc/n7T7YdG8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HgTqVFseGPgc6SEBC/ZuqvlfKoLzwP5ChVlVyHsiYNw85P12eIFcqXzUDAPJiV8Ba irkW+80YXVR/R52kVLAeD5ugd/x9PrxXp4sNKtjNJuPmqBKsTamVrIlole+OF9Iuy/ E3oCpGYOuxVKVPa15JaS2LgycUiLo2/KlPMM0yqE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aleksandrs Vinarskis , Andy Shevchenko , Lee Jones Subject: [PATCH 6.8 277/399] mfd: intel-lpss: Introduce QUIRK_CLOCK_DIVIDER_UNITY for XPS 9530 Date: Mon, 1 Apr 2024 17:44:03 +0200 Message-ID: <20240401152557.449397455@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240401152549.131030308@linuxfoundation.org> References: <20240401152549.131030308@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Aleksandrs Vinarskis commit 1d8c51ed2ddcc4161e6496cf14fcd83921c50ec8 upstream. Some devices (eg. Dell XPS 9530, 2023) due to a firmware bug have a misconfigured clock divider, which should've been 1:1. This introduces quirk which conditionally re-configures the clock divider to 1:1. Signed-off-by: Aleksandrs Vinarskis Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20231221185142.9224-3-alex.vinarskis@gmail.com Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- drivers/mfd/intel-lpss-pci.c | 5 +++++ drivers/mfd/intel-lpss.c | 7 +++++++ drivers/mfd/intel-lpss.h | 5 +++++ 3 files changed, 17 insertions(+) --- a/drivers/mfd/intel-lpss-pci.c +++ b/drivers/mfd/intel-lpss-pci.c @@ -34,6 +34,11 @@ static const struct pci_device_id quirk_ PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, 0x9d64, 0x152d, 0x1237), .driver_data = QUIRK_IGNORE_RESOURCE_CONFLICTS, }, + { + /* Dell XPS 9530 (2023) */ + PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, 0x51fb, 0x1028, 0x0beb), + .driver_data = QUIRK_CLOCK_DIVIDER_UNITY, + }, { } }; --- a/drivers/mfd/intel-lpss.c +++ b/drivers/mfd/intel-lpss.c @@ -300,6 +300,7 @@ static int intel_lpss_register_clock_div { char name[32]; struct clk *tmp = *clk; + int ret; snprintf(name, sizeof(name), "%s-enable", devname); tmp = clk_register_gate(NULL, name, __clk_get_name(tmp), 0, @@ -316,6 +317,12 @@ static int intel_lpss_register_clock_div return PTR_ERR(tmp); *clk = tmp; + if (lpss->info->quirks & QUIRK_CLOCK_DIVIDER_UNITY) { + ret = clk_set_rate(tmp, lpss->info->clk_rate); + if (ret) + return ret; + } + snprintf(name, sizeof(name), "%s-update", devname); tmp = clk_register_gate(NULL, name, __clk_get_name(tmp), CLK_SET_RATE_PARENT, lpss->priv, 31, 0, NULL); --- a/drivers/mfd/intel-lpss.h +++ b/drivers/mfd/intel-lpss.h @@ -19,6 +19,11 @@ * Set to ignore resource conflicts with ACPI declared SystemMemory regions. */ #define QUIRK_IGNORE_RESOURCE_CONFLICTS BIT(0) +/* + * Some devices have misconfigured clock divider due to a firmware bug. + * Set this to force the clock divider to 1:1 ratio. + */ +#define QUIRK_CLOCK_DIVIDER_UNITY BIT(1) struct device; struct resource;