kernel/linux.git/drivers/nvmem/Makefile, branch v6.18.21

nvmem: an8855: Add support for Airoha AN8855 Switch EFUSE

2025-09-12T13:49:03+00:00

Add support for Airoha AN8855 Switch EFUSE. These EFUSE might be used for calibration data for the internal switch PHYs. Signed-off-by: Christian Marangi Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20250912131415.303407-6-srini@kernel.org Signed-off-by: Greg Kroah-Hartman

nvmem: s32g-ocotp: Add driver for S32G OCOTP

2025-09-12T13:49:03+00:00

Provide access to the On Chip One-Time Programmable Controller (OCOTP) pages on the NXP S32G platform. Signed-off-by: Ciprian Costea Co-developed-by: Ghennadi Procopciuc Signed-off-by: Ghennadi Procopciuc Co-developed-by: Larisa Grigore Signed-off-by: Larisa Grigore Signed-off-by: Dan Carpenter Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20250912131415.303407-3-srini@kernel.org Signed-off-by: Greg Kroah-Hartman

Merge tag 'char-misc-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2025-06-06T18:50:47+00:00

Pull char / misc / iio driver updates from Greg KH: "Here is the big char/misc/iio and other small driver subsystem pull request for 6.16-rc1. Overall, a lot of individual changes, but nothing major, just the normal constant forward progress of new device support and cleanups to existing subsystems. Highlights in here are: - Large IIO driver updates and additions and device tree changes - Android binder bugfixes and logfile fixes - mhi driver updates - comedi driver updates - counter driver updates and additions - coresight driver updates and additions - echo driver removal as there are no in-kernel users of it - nvmem driver updates - spmi driver updates - new amd-sbi driver "subsystem" and drivers added - rust miscdriver binding documentation fix - other small driver fixes and updates (uio, w1, acrn, hpet, xillybus, cardreader drivers, fastrpc and others) All of these have been in linux-next for quite a while with no reported problems" * tag 'char-misc-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (390 commits) binder: fix yet another UAF in binder_devices counter: microchip-tcb-capture: Add watch validation support dt-bindings: iio: adc: Add ROHM BD79100G iio: adc: add support for Nuvoton NCT7201 dt-bindings: iio: adc: add NCT7201 ADCs iio: chemical: Add driver for SEN0322 dt-bindings: trivial-devices: Document SEN0322 iio: adc: ad7768-1: reorganize driver headers iio: bmp280: zero-init buffer iio: ssp_sensors: optimalize -> optimize HID: sensor-hub: Fix typo and improve documentation iio: admv1013: replace redundant ternary operator with just len iio: chemical: mhz19b: Fix error code in probe() iio: adc: at91-sama5d2: use IIO_DECLARE_BUFFER_WITH_TS iio: accel: sca3300: use IIO_DECLARE_BUFFER_WITH_TS iio: adc: ad7380: use IIO_DECLARE_DMA_BUFFER_WITH_TS iio: adc: ad4695: rename AD4695_MAX_VIN_CHANNELS iio: adc: ad4695: use IIO_DECLARE_DMA_BUFFER_WITH_TS iio: introduce IIO_DECLARE_BUFFER_WITH_TS macros iio: make IIO_DMA_MINALIGN minimum of 8 bytes ...

nvmem: Add apple-spmi-nvmem driver

2025-05-21T12:28:27+00:00

Add a driver for a series of SPMI-attached PMICs present on Apple devices Reviewed-by: Neal Gompa Reviewed-by: Alyssa Rosenzweig Signed-off-by: Hector Martin Co-developed-by: Sasha Finkelstein Signed-off-by: Sasha Finkelstein Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20250509122452.11827-4-srini@kernel.org Signed-off-by: Greg Kroah-Hartman

nvmem: max77759: Add Maxim MAX77759 NVMEM driver

2025-05-09T14:23:18+00:00

The Maxim MAX77759 is a companion PMIC for USB Type-C applications and includes Battery Charger, Fuel Gauge, temperature sensors, USB Type-C Port Controller (TCPC), NVMEM, and a GPIO expander. This driver exposes the non volatile memory using the platform device registered by the core MFD driver. Signed-off-by: André Draszik Acked-by: Srinivas Kandagatla Acked-by: Peter Griffin Link: https://lore.kernel.org/r/20250509-max77759-mfd-v10-3-962ac15ee3ef@linaro.org Signed-off-by: Lee Jones

nvmem: Add R-Car E-FUSE driver

2024-11-05T04:33:46+00:00

R-Car Gen4 SoCs contain fuses indicating hardware support or hardware (e.g. tuning) parameters. Add a driver to access the state of the fuses. This supports two types of hardware fuse providers: 1. E-FUSE non-volatile memory accessible through the Pin Function Controller on R-Car V3U and S4-8, 2. E-FUSE non-volatile memory accessible through OTP_MEM on R-Car V4H and V4M. The state of the cells can be read using the NVMEM framework, either from kernel space (e.g. by the Renesas UFSHCD driver), or from userspace. Signed-off-by: Geert Uytterhoeven Reviewed-by: Yoshihiro Shimoda Acked-by: Arnd Bergmann Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20241030140315.40562-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: core: Rework layouts to become regular devices

2023-12-15T12:30:07+00:00

Current layout support was initially written without modules support in mind. When the requirement for module support rose, the existing base was improved to adopt modularization support, but kind of a design flaw was introduced. With the existing implementation, when a storage device registers into NVMEM, the core tries to hook a layout (if any) and populates its cells immediately. This means, if the hardware description expects a layout to be hooked up, but no driver was provided for that, the storage medium will fail to probe and try later from scratch. Even if we consider that the hardware description shall be correct, we could still probe the storage device (especially if it contains the rootfs). One way to overcome this situation is to consider the layouts as devices, and leverage the native notifier mechanism. When a new NVMEM device is registered, we can populate its nvmem-layout child, if any, and wait for the matching to be done in order to get the cells (the waiting can be easily done with the NVMEM notifiers). If the layout driver is compiled as a module, it should automatically be loaded. This way, there is no strong order to enforce, any NVMEM device creation or NVMEM layout driver insertion will be observed as a new event which may lead to the creation of additional cells, without disturbing the probes with costly (and sometimes endless) deferrals. In order to achieve that goal we create a new bus for the nvmem-layouts with minimal logic to match nvmem-layout devices with nvmem-layout drivers. All this infrastructure code is created in the layouts.c file. Signed-off-by: Miquel Raynal Tested-by: Rafał Miłecki Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20231215111536.316972-7-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: sec-qfprom: Add Qualcomm secure QFPROM support

2023-08-23T14:34:01+00:00

For some of the Qualcomm SoC's, it is possible that some of the fuse regions or entire qfprom region is protected from non-secure access. In such situations, the OS will have to use secure calls to read the region. With that motivation, add secure qfprom driver. Signed-off-by: Komal Bajaj Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20230823132744.350618-18-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: add new NXP QorIQ eFuse driver

2023-08-23T14:34:01+00:00

Add SFP (Security Fuse Processor) read support for NXP (Freescale) QorIQ series SOC's. This patch adds support for the T1023 SOC using the SFP offset from the existing T1023 device tree. In theory this should also work for T1024, T1014 and T1013 which uses the same SFP base offset. Signed-off-by: Richard Alpe Reviewed-by: Niklas Söderlund Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20230823132744.350618-13-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: imx: support i.MX93 OCOTP

2023-06-15T11:42:17+00:00

Add i.MX93 OCOTP support. i.MX93 OCOTP has two parts: Fuse shadow block(fsb) and fuse managed by ELE. The FSB part could be directly accessed with MMIO, the ELE could only be accessed with ELE API. Currently the ELE API is not ready, so NULL function callback is used, but it was tested with downstream ELE API. Signed-off-by: Peng Fan Signed-off-by: Srinivas Kandagatla Message-ID: <20230611140330.154222-22-srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman