linux-stable.git/drivers/nvmem/Makefile, branch linux-5.17.y

nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP

2021-08-13T08:27:20+00:00

This OTP is read-only and contains various keys used by the console to
decrypt, encrypt or verify various pieces of storage.

Its size depends on the console, it is 128 bytes on the Wii and
1024 bytes on the Wii U (split into eight 128 bytes banks).

It can be used directly by writing into one register and reading from
the other one, without any additional synchronisation.

This driver was written based on reversed documentation, see:
https://wiiubrew.org/wiki/Hardware/OTP

Tested-by: Jonathan Neuschäfer   # on Wii
Tested-by: Emmanuel Gil Peyrot   # on Wii U
Signed-off-by: Emmanuel Gil Peyrot 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20210810153036.1494-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: brcm_nvram: new driver exposing Broadcom's NVRAM

2021-04-02T14:26:33+00:00

This driver provides access to Broadcom's NVRAM.

Signed-off-by: Rafał Miłecki 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20210330111241.19401-6-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: Add driver to expose reserved memory as nvmem

2021-02-04T16:04:18+00:00

Firmware/co-processors might use reserved memory areas in order to pass
data stemming from an nvmem device otherwise non accessible to Linux.
For example an EEPROM memory only physically accessible to firmware, or
data only accessible early at boot time.

In order to expose this data to other drivers and user-space, the driver
models the reserved memory area as an nvmem device.

Tested-by: Tim Gover 
Reviewed-by: Rob Herring 
Signed-off-by: Nicolas Saenz Julienne 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20210129171430.11328-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: core: remove nvmem_sysfs_get_groups()

2020-03-25T18:23:49+00:00

Now that we are using is_bin_visible callback, we do not need
nvmem_sysfs_get_groups() anymore so move all the relevant data-structures
and code to core.c

Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200325131951.31887-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: add driver for JZ4780 efuse

2020-03-19T06:41:03+00:00

This patch brings support for the JZ4780 efuse. Currently it only exposes
a read only access to the entire 8K bits efuse memory and nvmem cells.

To fetch for example the MAC address:

dd if=/sys/devices/platform/134100d0.efuse/jz4780-efuse0/nvmem bs=1 skip=34 count=6 status=none | xxd

Tested-by: Mathieu Malaterre 
Signed-off-by: PrasannaKumar Muralidharan 
Signed-off-by: Mathieu Malaterre 
Signed-off-by: H. Nikolaus Schaller 
Signed-off-by: Paul Cercueil 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200310132257.23358-13-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: add QTI SDAM driver

2020-01-16T19:56:49+00:00

QTI SDAM driver allows PMIC peripherals to access the shared memory
that is available on QTI PMICs.

Use subsys_initcall as PMIC SDAM NV memory is accessed by multiple PMIC
drivers (charger, fuel gauge) to store/restore data across reboots
required during their initialization.

Signed-off-by: Anirudh Ghayal 
Signed-off-by: Shyam Kumar Thella 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200116161100.30637-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: add Rockchip OTP driver

2019-11-05T17:35:33+00:00

Newer Rockchip socs like the px30 use a different one-time-programmable
memory controller for things like cpu-id and leakage information,
so add the necessary driver for it.

Signed-off-by: Finley Xiao 
[ported from vendor 4.4, converted to clock-bulk API and cleanups]
Signed-off-by: Heiko Stuebner 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20191029114240.14905-11-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: sprd: Add Spreadtrum SoCs eFuse support

2019-11-05T17:35:31+00:00

The Spreadtrum eFuse controller is widely used to dump chip ID,
configuration setting, function select and so on, as well as
supporting one-time programming.

Signed-off-by: Freeman Liu 
Signed-off-by: Baolin Wang 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20191029114240.14905-8-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: imx: add i.MX8 nvmem driver

2019-06-19T17:35:51+00:00

This patch adds i.MX8 nvmem ocotp driver to access fuse via
RPC to i.MX8 system controller.

Cc: Srinivas Kandagatla 
Cc: Shawn Guo 
Cc: Sascha Hauer 
Cc: Pengutronix Kernel Team 
Cc: Fabio Estevam 
Cc: NXP Linux Team 
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Peng Fan 
Reviewed-by: Dong Aisheng 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: core: add NVMEM_SYSFS Kconfig

2019-04-25T17:44:33+00:00

Many nvmem providers are not very keen on having default sysfs
nvmem entry, as most of the usecases for them are inside kernel
itself. And in some cases read/writes to some areas in nvmem are
restricted and trapped at secure monitor level, so accessing them
from userspace would result in board reboots.

This patch adds new NVMEM_SYSFS Kconfig to make binary sysfs entry
an optional one. This provision will give more flexibility to users.
This patch also moves existing sysfs code to a new file so that its
not compiled in when its not really required.

Signed-off-by: Srinivas Kandagatla 
Reviewed-by: Mika Westerberg 
Reviewed-by: Gaurav Kohli 
Tested-by: Gaurav Kohli 
Signed-off-by: Greg Kroah-Hartman