kernel/linux.git/drivers/base/regmap, branch v6.19.11

regmap: Synchronize cache for the page selector

2026-04-02T11:25:32+00:00

[ Upstream commit 09e70e4f119ff650d24c96161fd2f62ac7e424b0 ] If the selector register is represented in each page, its value according to the debugfs is stale because it gets synchronized only after the real page switch happens. Hence the regmap cache initialisation from the HW inherits outdated data in the selector register. Synchronize cache for the page selector just in time. Before (offset followed by hexdump, the first byte is selector): // Real registers 18: 05 ff 00 00 ff 0f 00 00 f0 00 00 00 ... // Virtual (per port) 40: 05 ff 00 00 e0 e0 00 00 00 00 00 1f 50: 00 ff 00 00 e0 e0 00 00 00 00 00 1f 60: 01 ff 00 00 ff ff 00 00 00 00 00 00 70: 02 ff 00 00 cf f3 00 00 00 00 00 0c 80: 03 ff 00 00 00 00 00 00 00 00 00 ff 90: 04 ff 00 00 ff 0f 00 00 f0 00 00 00 After: // Real registers 18: 05 ff 00 00 ff 0f 00 00 f0 00 00 00 ... // Virtual (per port) 40: 00 ff 00 00 e0 e0 00 00 00 00 00 1f 50: 01 ff 00 00 e0 e0 00 00 00 00 00 1f 60: 02 ff 00 00 ff ff 00 00 00 00 00 00 70: 03 ff 00 00 cf f3 00 00 00 00 00 0c 80: 04 ff 00 00 00 00 00 00 00 00 00 ff 90: 05 ff 00 00 ff 0f 00 00 f0 00 00 00 Fixes: 6863ca622759 ("regmap: Add support for register indirect addressing.") Signed-off-by: Andy Shevchenko Link: https://patch.msgid.link/20260302184753.2693803-1-andriy.shevchenko@linux.intel.com Tested-by: Marek Szyprowski Signed-off-by: Mark Brown Signed-off-by: Sasha Levin

regmap: Fix race condition in hwspinlock irqsave routine

2026-01-12T12:25:29+00:00

Previously, the address of the shared member '&map->spinlock_flags' was passed directly to 'hwspin_lock_timeout_irqsave'. This creates a race condition where multiple contexts contending for the lock could overwrite the shared flags variable, potentially corrupting the state for the current lock owner. Fix this by using a local stack variable 'flags' to store the IRQ state temporarily. Fixes: 8698b9364710 ("regmap: Add hardware spinlock support") Signed-off-by: Cheng-Yu Lee Co-developed-by: Yu-Chun Lin Signed-off-by: Yu-Chun Lin Link: https://patch.msgid.link/20260109032633.8732-1-eleanor.lin@realtek.com Signed-off-by: Mark Brown

regmap: maple: free entry on mas_store_gfp() failure

2026-01-05T13:14:50+00:00

regcache_maple_write() allocates a new block ('entry') to merge adjacent ranges and then stores it with mas_store_gfp(). When mas_store_gfp() fails, the new 'entry' remains allocated and is never freed, leaking memory. Free 'entry' on the failure path; on success continue freeing the replaced neighbor blocks ('lower', 'upper'). Signed-off-by: Kaushlendra Kumar Link: https://patch.msgid.link/20260105031820.260119-1-kaushlendra.kumar@intel.com Signed-off-by: Mark Brown

Merge tag 'i3c/for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux

2025-12-08T02:25:14+00:00

Pull i3c updates from Alexandre Belloni: "HDR support has finally been added. mipi-i3c-hci has been reworked and Intel Nova Lake-S support has been added. Subsystem: - Add HDR transfer support Drivers: - dw: fix bus hang on Agilex5 - mipi-i3c-hci: Intel Nova Lake-S support, IOMMU support - svc: HDR support" * tag 'i3c/for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (28 commits) regmap: i3c: switch to use i3c_xfer from i3c_priv_xfer net: mctp i3c: switch to use i3c_xfer from i3c_priv_xfer hwmon: (lm75): switch to use i3c_xfer from i3c_priv_xfer i3c: document i3c_xfers i3c: fix I3C_SDR bit number i3c: master: svc: Add basic HDR mode support i3c: master: svc: Replace bool rnw with union for HDR support i3c: Switch to use new i3c_xfer from i3c_priv_xfer i3c: Add HDR API support i3c: master: add WQ_PERCPU to alloc_workqueue users i3c: master: Remove i3c_device_free_ibi from i3c_device_remove i3c: mipi-i3c-hci-pci: Set d3cold_delay to 0 for Intel controllers i3c: mipi-i3c-hci-pci: Add LTR support for Intel controllers i3c: mipi-i3c-hci-pci: Add exit callback i3c: mipi-i3c-hci-pci: Change callback parameter i3c: mipi-i3c-hci-pci: Allocate a structure for mipi_i3c_hci_pci device information i3c: mipi-i3c-hci-pci: Factor out intel_reset() i3c: mipi-i3c-hci-pci: Factor out private registers ioremapping i3c: mipi-i3c-hci-pci: Constify driver data i3c: mipi-i3c-hci-pci: Use readl_poll_timeout() ...

Merge tag 'regmap-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

2025-12-04T19:16:44+00:00

Pull regmap updates from Mark Brown: "Another small update for regmap, we have one new feature plus a little bit of cleanup: - Support for sparseness information in the flat cache, allowing users that really need the performance properties it provides to benefit from the interface and startup time improvements that sparsness provides without needing to go all the way to a more fancy data structure - Cleanup work from Andy Shevchenko, refactoring the cache interface in preparation for some future stuff he's working on" * tag 'regmap-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: sdw-mbq: Reorder regmap_mbq_context struct for better packing regmap: i3c: Use ARRAY_SIZE() regcache: maple: Split ->populate() from ->init() regcache: flat: Split ->populate() from ->init() regcache: flat: Remove unneeded check and error message for -ENOMEM regcache: rbtree: Split ->populate() from ->init() regcache: Add ->populate() callback to separate from ->init() regmap: warn users about uninitialized flat cache regmap: add flat cache with sparse validity

regmap: i3c: switch to use i3c_xfer from i3c_priv_xfer

2025-12-02T16:33:02+00:00

Switch to use i3c_xfer instead of i3c_priv_xfer because framework will update to support HDR mode. i3c_priv_xfer is now an alias of i3c_xfer. Replace i3c_device_do_priv_xfers() with i3c_device_do_xfers(..., I3C_SDR) to align with the new API. Prepare for removal of i3c_priv_xfer and i3c_device_do_priv_xfers(). Signed-off-by: Frank Li Acked-by: Mark Brown Link: https://patch.msgid.link/20251028-lm75-v1-3-9bf88989c49c@nxp.com Signed-off-by: Alexandre Belloni

regmap: sdw-mbq: Reorder regmap_mbq_context struct for better packing

2025-11-07T14:07:04+00:00

Avoid a hole in struct regmap_mbq_context by shuffling the members slightly. Pahole before: struct regmap_mbq_context { struct device * dev; /* 0 8 */ struct sdw_slave * sdw; /* 8 8 */ struct regmap_sdw_mbq_cfg cfg; /* 16 32 */ int val_size; /* 48 4 */ /* XXX 4 bytes hole, try to pack */ bool (*readable_reg)(struct device *, unsigned int); /* 56 8 */ /* size: 64, cachelines: 1, members: 5 */ /* sum members: 60, holes: 1, sum holes: 4 */ }; Pahole after: struct regmap_mbq_context { struct device * dev; /* 0 8 */ struct sdw_slave * sdw; /* 8 8 */ bool (*readable_reg)(struct device *, unsigned int); /* 16 8 */ struct regmap_sdw_mbq_cfg cfg; /* 24 32 */ int val_size; /* 56 4 */ /* size: 64, cachelines: 1, members: 5 */ /* padding: 4 */ }; Signed-off-by: Charles Keepax Link: https://patch.msgid.link/20251107104551.1553526-1-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

ASoC: qcom: q6dsp: fixes and updates

2025-11-06T11:34:45+00:00

Merge series from Srinivas Kandagatla : This patchset has 4 fixes and some enhancements to the Elite DSP driver support. Fixes includes - setting correct flags for expected behaviour of appl_ptr - fix closing of copp instances - fix buffer alignment. - fix state checks before closing asm stream Enhancements include: - adding q6asm_get_hw_pointer and ack callback support - simplify code via __free(kfree) mechanism. - use spinlock guards - few cleanups discovered during doing above 2. There is another set of updates comming soon, which will add support for early memory mapping and few more modules support in audioreach.

regmap: i3c: Use ARRAY_SIZE()

2025-11-04T13:53:38+00:00

Use ARRAY_SIZE() instead of hard coded numbers to show the intention and make code robust against potential changes. Signed-off-by: Andy Shevchenko Reviewed-by: Danilo Krummrich Link: https://patch.msgid.link/20251103180946.604127-1-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown

regcache: maple: Split ->populate() from ->init()

2025-10-31T12:01:55+00:00

Split ->populate() implementation from ->init() code. This decoupling will help for the further changes. Signed-off-by: Andy Shevchenko Reviewed-by: Charles Keepax Link: https://patch.msgid.link/20251031080540.3970776-6-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown