This is a note to let you know that I've just added the patch titled
mfd: intel-lpss: Switch to generalized quirk table
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mfd-intel-lpss-switch-to-generalized-quirk-table.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ac9538f6007e1c80f1b8a62db7ecc391b4d78ae5 Mon Sep 17 00:00:00 2001
From: Aleksandrs Vinarskis <alex.vinarskis@xxxxxxxxx>
Date: Thu, 21 Dec 2023 19:51:41 +0100
Subject: mfd: intel-lpss: Switch to generalized quirk table
From: Aleksandrs Vinarskis <alex.vinarskis@xxxxxxxxx>
commit ac9538f6007e1c80f1b8a62db7ecc391b4d78ae5 upstream.
Introduce generic quirk table, and port existing walkaround for select
Microsoft devices to it. This is a preparation for
QUIRK_CLOCK_DIVIDER_UNITY.
Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231221185142.9224-2-alex.vinarskis@xxxxxxxxx
Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mfd/intel-lpss-pci.c | 23 +++++++++++++++--------
drivers/mfd/intel-lpss.c | 2 +-
drivers/mfd/intel-lpss.h | 9 ++++++++-
3 files changed, 24 insertions(+), 10 deletions(-)
--- a/drivers/mfd/intel-lpss-pci.c
+++ b/drivers/mfd/intel-lpss-pci.c
@@ -18,18 +18,24 @@
#include "intel-lpss.h"
-/* Some DSDTs have an unused GEXP ACPI device conflicting with I2C4 resources */
-static const struct pci_device_id ignore_resource_conflicts_ids[] = {
- /* Microsoft Surface Go (version 1) I2C4 */
- { PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, 0x9d64, 0x152d, 0x1182), },
- /* Microsoft Surface Go 2 I2C4 */
- { PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, 0x9d64, 0x152d, 0x1237), },
+static const struct pci_device_id quirk_ids[] = {
+ {
+ /* Microsoft Surface Go (version 1) I2C4 */
+ PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, 0x9d64, 0x152d, 0x1182),
+ .driver_data = QUIRK_IGNORE_RESOURCE_CONFLICTS,
+ },
+ {
+ /* Microsoft Surface Go 2 I2C4 */
+ PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, 0x9d64, 0x152d, 0x1237),
+ .driver_data = QUIRK_IGNORE_RESOURCE_CONFLICTS,
+ },
{ }
};
static int intel_lpss_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
+ const struct pci_device_id *quirk_pci_info;
struct intel_lpss_platform_info *info;
int ret;
@@ -45,8 +51,9 @@ static int intel_lpss_pci_probe(struct p
info->mem = &pdev->resource[0];
info->irq = pdev->irq;
- if (pci_match_id(ignore_resource_conflicts_ids, pdev))
- info->ignore_resource_conflicts = true;
+ quirk_pci_info = pci_match_id(quirk_ids, pdev);
+ if (quirk_pci_info)
+ info->quirks = quirk_pci_info->driver_data;
pdev->d3cold_delay = 0;
--- a/drivers/mfd/intel-lpss.c
+++ b/drivers/mfd/intel-lpss.c
@@ -401,7 +401,7 @@ int intel_lpss_probe(struct device *dev,
return ret;
lpss->cell->swnode = info->swnode;
- lpss->cell->ignore_resource_conflicts = info->ignore_resource_conflicts;
+ lpss->cell->ignore_resource_conflicts = info->quirks & QUIRK_IGNORE_RESOURCE_CONFLICTS;
intel_lpss_init_dev(lpss);
--- a/drivers/mfd/intel-lpss.h
+++ b/drivers/mfd/intel-lpss.h
@@ -11,16 +11,23 @@
#ifndef __MFD_INTEL_LPSS_H
#define __MFD_INTEL_LPSS_H
+#include <linux/bits.h>
#include <linux/pm.h>
+/*
+ * Some DSDTs have an unused GEXP ACPI device conflicting with I2C4 resources.
+ * Set to ignore resource conflicts with ACPI declared SystemMemory regions.
+ */
+#define QUIRK_IGNORE_RESOURCE_CONFLICTS BIT(0)
+
struct device;
struct resource;
struct software_node;
struct intel_lpss_platform_info {
struct resource *mem;
- bool ignore_resource_conflicts;
int irq;
+ unsigned int quirks;
unsigned long clk_rate;
const char *clk_con_id;
const struct software_node *swnode;
Patches currently in stable-queue which might be from alex.vinarskis@xxxxxxxxx are
queue-6.7/mfd-intel-lpss-switch-to-generalized-quirk-table.patch
queue-6.7/mfd-intel-lpss-introduce-quirk_clock_divider_unity-for-xps-9530.patch
