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20077583ccdd4db8aa626eae442e030d217901db
linux/drivers/nvmem
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Rafał Miłecki 1e37bf84af nvmem: brcm_nvram: store a copy of NVRAM content 
This driver uses MMIO access for reading NVRAM from a flash device.
Underneath there is a flash controller that reads data and provides
mapping window.

Using MMIO interface affects controller configuration and may break real
controller driver. It was reported by multiple users of devices with
NVRAM stored on NAND.

Modify driver to read & cache NVRAM content during init and use that
copy to provide NVMEM data when requested. On NAND flashes due to their
alignment NVRAM partitions can be quite big (1 MiB and more) while
actual NVRAM content stays quite small (usually 16 to 32 KiB). To avoid
allocating so much memory check for actual data length.

Link: https://lore.kernel.org/linux-mtd/CACna6rwf3_9QVjYcM+847biTX=K0EoWXuXcSMkJO1Vy_5vmVqA@mail.gmail.com/
Fixes: 3fef9ed062 ("nvmem: brcm_nvram: new driver exposing Broadcom's NVRAM")
Cc:  <Stable@vger.kernel.org>
Cc: Arınç ÜNAL <arinc.unal@arinc9.com>
Cc: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20231215111358.316727-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-12-15 13:15:02 +01:00
..
layouts
nvmem: layouts: sl28vpd: set varaiable sl28vpd_layout storage-class-specifier to static
2023-04-05 19:41:13 +02:00
apple-efuses.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
bcm-ocotp.c
nvmem: Explicitly include correct DT includes
2023-08-23 16:34:01 +02:00
brcm_nvram.c
nvmem: brcm_nvram: store a copy of NVRAM content
2023-12-15 13:15:02 +01:00
core.c
nvmem: Do not expect fixed layouts to grab a layout driver
2023-12-07 11:19:32 +09:00
imx-iim.c
nvmem: Explicitly include correct DT includes
2023-08-23 16:34:01 +02:00
imx-ocotp-ele.c
nvmem: Explicitly include correct DT includes
2023-08-23 16:34:01 +02:00
imx-ocotp-scu.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
imx-ocotp.c
Merge tag 'char-misc-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2023-11-03 14:51:08 -10:00
jz4780-efuse.c
nvmem: jz4780-efuse: Use PTR_ERR_OR_ZERO() to simplify code
2020-05-15 16:20:02 +02:00
Kconfig
nvmem: sec-qfprom: Add Qualcomm secure QFPROM support
2023-08-23 16:34:01 +02:00
lan9662-otpc.c
nvmem: lan9662-otp: Change return type of lan9662_otp_wait_flag_clear()
2022-11-22 18:22:05 +01:00
layerscape-sfp.c
nvmem: sfp: Add support for TA 2.1 devices
2022-05-09 15:46:29 +02:00
lpc18xx_eeprom.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
lpc18xx_otp.c
nvmem: Explicitly include correct DT includes
2023-08-23 16:34:01 +02:00
Makefile
nvmem: sec-qfprom: Add Qualcomm secure QFPROM support
2023-08-23 16:34:01 +02:00
meson-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
meson-mx-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
microchip-otpc.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
mtk-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
mxs-ocotp.c
nvmem: Use device_get_match_data()
2023-10-21 19:19:15 +02:00
nintendo-otp.c
nvmem: nintendo-otp: Use devm_platform_ioremap_resource()
2023-04-05 19:41:12 +02:00
qcom-spmi-sdam.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
qfprom.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
qoriq-efuse.c
nvmem: add new NXP QorIQ eFuse driver
2023-08-23 16:34:01 +02:00
rave-sp-eeprom.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
rmem.c
nvmem: rmem: Use NVMEM_DEVID_AUTO
2023-06-15 13:42:18 +02:00
rockchip-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
rockchip-otp.c
nvmem: rockchip-otp: Add support for RK3588
2023-06-15 13:42:17 +02:00
sc27xx-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
sec-qfprom.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
snvs_lpgpr.c
nvmem: Explicitly include correct DT includes
2023-08-23 16:34:01 +02:00
sprd-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
stm32-bsec-optee-ta.c
nvmem: stm32: add OP-TEE support for STM32MP13x
2023-02-06 19:06:59 +01:00
stm32-bsec-optee-ta.h
nvmem: stm32: add OP-TEE support for STM32MP13x
2023-02-06 19:06:59 +01:00
stm32-romem.c
nvmem: Use device_get_match_data()
2023-10-21 19:19:15 +02:00
sunplus-ocotp.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
sunxi_sid.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
u-boot-env.c
nvmem: u-boot-env:: Replace zero-length array with DECLARE_FLEX_ARRAY() helper
2023-08-23 16:34:02 +02:00
uniphier-efuse.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
vf610-ocotp.c
nvmem: vf610-ocotp: Use devm_platform_get_and_ioremap_resource()
2023-04-05 19:41:13 +02:00
zynqmp_nvmem.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00