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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-02 11:12:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-02 11:12:25 -0700
commit8fa0db3a9b8ef310eb40cf91481141ece084f584 (patch)
treed78fe991dc58ca33a755d37ae1b753322817e99d /drivers/mfd
parent64ae88ff48cb5b3cc7b7aea97241a3e940085bf7 (diff)
parent6352f3478a95cc413ecfee4fdb3300009fd3679a (diff)
Merge tag 'acpi-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki: "These rework the handling of ACPI device objects to use the driver core facilities for managing child ones instead of some questionable home-grown ways without the requisite locking and reference counting, clean up the EC driver, improve suspend-to-idle handling on x86, add some systems to the ACPI backlight quirk list, fix some assorted issues, clean up code and improve documentation. Specifics: - Use facilities provided by the driver core and some additional helpers to handle the children of a given ACPI device object in multiple places instead of using the children and node list heads in struct acpi_device which is error prone (Rafael Wysocki). - Fix ACPI-related device reference counting issue in the hisi_lpc bus driver (Yang Yingliang). - Drop the children and node list heads that are not needed any more from struct acpi_device (Rafael Wysocki). - Drop driver member from struct acpi_device (Uwe Kleine-König). - Drop redundant check from acpi_device_remove() (Uwe Kleine-König). - Prepare the CPPC library for handling backwards-compatible future _CPC return package formats gracefully (Rafael Wysocki). - Clean up the ACPI EC driver after previous changes in it (Hans de Goede). - Drop leftover acpi_processor_get_limit_info() declaration (Riwen Lu). - Split out thermal initialization from ACPI PSS (Riwen Lu). - Annotate more functions in the ACPI CPU idle driver to live in the cpuidle section (Guilherme G. Piccoli). - Fix _EINJ vs "special purpose" EFI memory regions (Dan Williams). - Implement a better fix to avoid spamming the console with old error logs (Tony Luck). - Fix typo in a comment in the APEI code (Xiang wangx). - Save NVS memory during transitions into S3 on Lenovo G40-45 (Manyi Li). - Add support for upcoming AMD uPEP device ID AMDI008 to the ACPI suspend-to-idle driver for x86 platforms (Shyam Sundar S K). - Clean up checks related to the ACPI_FADT_LOW_POWER_S0 platform flag in the LPIT table driver and the suspend-to-idle driver for x86 platforms (Rafael Wysocki). - Print information messages regarding declared LPS0 idle support in the platform firmware (Rafael Wysocki). - Fix missing check in register_device_clock() in the ACPI driver for Intel SoCs (huhai). - Fix ACS setup in the VIOT table parser (Eric Auger). - Skip IRQ override on AMD Zen platforms where it's harmful (Chuanhong Guo). - Use native backlight on Dell Inspiron N4010 (Hans de Goede). - Use native backlight on some TongFang devices (Werner Sembach). - Drop X86 dependency from the ACPI backlight driver Kconfig (Riwen Lu). - Shorten the quirk list in the ACPI backlight driver by identifying Clevo by board_name only (Werner Sembach). - Remove useless NULL pointer checks from 2 ACPI PCI link management functions (Andrey Strachuk). - Fix obsolete example in the ACPI EINJ documentation (Qifu Zhang). - Update links and references to _DSD-related documents (Sudeep Holla)" * tag 'acpi-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (46 commits) ACPI/PCI: Remove useless NULL pointer checks ACPI: CPPC: Do not prevent CPPC from working in the future ACPI: PM: x86: Print messages regarding LPS0 idle support ACPI: resource: skip IRQ override on AMD Zen platforms Documentation: ACPI: EINJ: Fix obsolete example ACPI: video: Use native backlight on Dell Inspiron N4010 ACPI: PM: s2idle: Use LPS0 idle if ACPI_FADT_LOW_POWER_S0 is unset Revert "ACPI / PM: LPIT: Register sysfs attributes based on FADT" ACPI: video: Shortening quirk list by identifying Clevo by board_name only ACPI: video: Force backlight native for some TongFang devices ACPI: PM: s2idle: Add support for upcoming AMD uPEP HID AMDI008 ACPI: VIOT: Fix ACS setup ACPI: bus: Drop unused list heads from struct acpi_device hisi_lpc: Use acpi_dev_for_each_child() bus: hisi_lpc: fix missing platform_device_put() in hisi_lpc_acpi_probe() ACPI: bus: Drop driver member of struct acpi_device ACPI: bus: Drop redundant check in acpi_device_remove() ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP ACPI: LPSS: Fix missing check in register_device_clock() ACPI: APEI: Better fix to avoid spamming the console with old error logs ...
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/mfd-core.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 684a011a6396..8b058200d5ad 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -60,12 +60,29 @@ int mfd_cell_disable(struct platform_device *pdev)
EXPORT_SYMBOL(mfd_cell_disable);
#if IS_ENABLED(CONFIG_ACPI)
+struct match_ids_walk_data {
+ struct acpi_device_id *ids;
+ struct acpi_device *adev;
+};
+
+static int match_device_ids(struct acpi_device *adev, void *data)
+{
+ struct match_ids_walk_data *wd = data;
+
+ if (!acpi_match_device_ids(adev, wd->ids)) {
+ wd->adev = adev;
+ return 1;
+ }
+
+ return 0;
+}
+
static void mfd_acpi_add_device(const struct mfd_cell *cell,
struct platform_device *pdev)
{
const struct mfd_cell_acpi_match *match = cell->acpi_match;
- struct acpi_device *parent, *child;
struct acpi_device *adev = NULL;
+ struct acpi_device *parent;
parent = ACPI_COMPANION(pdev->dev.parent);
if (!parent)
@@ -83,14 +100,14 @@ static void mfd_acpi_add_device(const struct mfd_cell *cell,
if (match) {
if (match->pnpid) {
struct acpi_device_id ids[2] = {};
+ struct match_ids_walk_data wd = {
+ .adev = NULL,
+ .ids = ids,
+ };
strlcpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
- list_for_each_entry(child, &parent->children, node) {
- if (!acpi_match_device_ids(child, ids)) {
- adev = child;
- break;
- }
- }
+ acpi_dev_for_each_child(parent, match_device_ids, &wd);
+ adev = wd.adev;
} else {
adev = acpi_find_child_device(parent, match->adr, false);
}