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linux-next/drivers/nvmem
Khouloud Touil 2a127da461 nvmem: add support for the write-protect pin
The write-protect pin handling looks like a standard property that
could benefit other users if available in the core nvmem framework.

Instead of modifying all the memory drivers to check this pin, make
the NVMEM subsystem check if the write-protect GPIO being passed
through the nvmem_config or defined in the device tree and pull it
low whenever writing to the memory.

There was a suggestion for introducing the gpiodesc from pdata, but
as pdata is already removed it could be replaced by adding it to
nvmem_config.

Reference: https://lists.96boards.org/pipermail/dev/2018-August/001056.html

Signed-off-by: Khouloud Touil <ktouil@baylibre.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-01-09 10:48:54 +01:00
..
bcm-ocotp.c nvmem: bcm-ocotp: Add ACPI support to BCM OCOTP 2019-01-31 16:24:14 +01:00
core.c nvmem: add support for the write-protect pin 2020-01-09 10:48:54 +01:00
imx-iim.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 460 2019-06-19 17:09:09 +02:00
imx-ocotp-scu.c nvmem: imx: scu: support write 2019-11-05 18:35:29 +01:00
imx-ocotp.c nvmem: imx-ocotp: reset error status on probe 2019-11-05 18:35:30 +01:00
Kconfig nvmem: add Rockchip OTP driver 2019-11-05 18:35:33 +01:00
lpc18xx_eeprom.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
lpc18xx_otp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
Makefile nvmem: add Rockchip OTP driver 2019-11-05 18:35:33 +01:00
meson-efuse.c firmware: meson_sm: Rework driver as a proper platform driver 2019-10-03 08:43:33 -07:00
meson-mx-efuse.c nvmem: meson-mx-efuse: allow reading data smaller than word_size 2019-08-18 12:56:52 +02:00
mtk-efuse.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mxs-ocotp.c nvmem: mxs-ocotp: update MODULE_AUTHOR() email address 2019-08-18 12:56:52 +02:00
nvmem-sysfs.c nvmem: Use the same permissions for eeprom as for nvmem 2019-07-30 18:22:20 +02:00
nvmem.h nvmem: add support for the write-protect pin 2020-01-09 10:48:54 +01:00
qfprom.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
rave-sp-eeprom.c nvmem: rave-sp-eeprom: Remove VLA usage 2018-07-07 17:30:46 +02:00
rockchip-efuse.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
rockchip-otp.c nvmem: add Rockchip OTP driver 2019-11-05 18:35:33 +01:00
sc27xx-efuse.c nvmem: sc27xx: Change to use devm_hwspin_lock_request_specific() to request one hwlock 2019-11-05 18:35:28 +01:00
snvs_lpgpr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sprd-efuse.c nvmem: sprd: Add Spreadtrum SoCs eFuse support 2019-11-05 18:35:31 +01:00
stm32-romem.c nvmem: stm32: add support for STM32MP15 BSEC to control OTP data 2019-04-25 19:43:12 +02:00
sunxi_sid.c nvmem: sunxi_sid: fix A64 SID controller support 2019-08-18 12:56:52 +02:00
uniphier-efuse.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
vf610-ocotp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
zynqmp_nvmem.c drivers: Defer probe if firmware is not ready 2019-03-18 13:45:27 +01:00