This patch series adds support for NXP LPC18xx EEPROM memory found in NXP LPC185x/3x and LPC435x/3x/2x/1x devices. This patchset is based on tag next-20151116 of the linux-next repository. It has been successfully tested on a LPC4337 CIAA-NXP Board. EEPROM notes: ------------ EEPROM size is 16384 bytes and it can be entirely read and written/erased with 1 word (4 bytes) granularity. The last page (128 bytes) contains the EEPROM initialization data and is not writable. Erase/program time is less than 3ms. The EEPROM device requires a ~1500 kHz clock (min 800 kHz, max 1600 kHz) that is generated dividing the system bus clock by the division factor, contained in the divider register (minus 1 encoded). EEPROM will be kept in Power Down mode except during read/write calls. Changeset: --------- v3 -> v4: * Added busywait polling for erase/program operation to finish. v2 -> v3: * Documented 'resets' property in devicetree bindings. * Added dynamic power on/off when writing/reading the EEPROM. * Added check for aligned offset in EEPROM writes. * Properly remove the driver in the reverse order of initialization. * Minor fixes. v1 -> v2: * Moved dt-bindings to be the first patch. * Changed compatible name from lpc1850 to lpc1857 as the former doesn't have EEPROM. * Fix hardware description which contained SoCs models without EEPROM. * Disabled fast_io and changed mdelay for msleep in regmap writes. * Replaced BUG_ON() in write function for an -EINVAL return. * Add patches for defconfig and devicetree files. Thanks, Ariel D'Alessandro (4): DT: nvmem: Add NXP LPC18xx EEPROM memory binding documentation nvmem: NXP LPC18xx EEPROM memory NVMEM driver ARM: dts: lpc18xx: add EEPROM memory node ARM: configs: lpc18xx: enable EEPROM NVMEM driver .../devicetree/bindings/nvmem/lpc1857-eeprom.txt | 28 ++ arch/arm/boot/dts/lpc18xx.dtsi | 12 + arch/arm/configs/lpc18xx_defconfig | 2 + drivers/nvmem/Kconfig | 9 + drivers/nvmem/Makefile | 2 + drivers/nvmem/lpc18xx_eeprom.c | 330 +++++++++++++++++++++ 6 files changed, 383 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/lpc1857-eeprom.txt create mode 100644 drivers/nvmem/lpc18xx_eeprom.c -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
