This is a patch series originally written by Maxime Ripard, https://lists.denx.de/pipermail/u-boot/2016-November/272138.html
titled:
[U-Boot] [PATCH RESEND 0/9] sunxi: chip: Enable the DIP auto-detection
and reworked to include support for the EEPROMs on the PDAs connected to the sama xplained boards.
This is the version 2 of the rework, version 1 was titled: [PATCH 00/20] Add support for 1wire protocol and 1wire eeproms
It addresses feedback received in the first version.
The patch series adds first a driver for onewire uclass, and onewire over gpio bitbanging driver. Then it adds a uclass for onewire EEPROMS, and specific driver for Maxim EEPROMs. I have added some sandbox support, configuration and device tree for it and for boards sama5d2_xplained, sama5d3_xplained, sama5d2_ptc_ek and sama5d27_som1_ek. Also added common code for PDA detection, as the memory on the PDAs is connected to the SoC on the onewire bus.
Thanks to everyone for the review and feedback.
Below is a short summary of the commits:
The series adds a w1-uclass driver for the onewire interface u-class. This is done in patch: [PATCH v2 01/30] w1: Add 1-Wire uclass
Also, we add a driver for the w1-uclass specific to the onewire over bitbanged gpio, this is done in patch: [PATCH v2 02/30] w1: Add 1-Wire gpio driver
Add the bindings documentation in: [PATCH v2 03/30] dt-bindings: W1: w1-gpio: added bindings for w1-gpio
A uclass driver is added for one wire eeproms, in patch : [PATCH v2 04/30] W1-EEPROM: Add an W1-EEPROM uclass for 1 wire EEPROMs
Connection between memories and the bus is done in the patch: [PATCH v2 05/30] w1: identify devices with w1-eeprom uclas
Specific driver for the DS24 Maxim EEPROMs is added in the patch: [PATCH v2 06/30] W1-EEPROM: add support for Maxim DS24 eeprom families
Bindings for the DS24xxx driver added in the patch: [PATCH v2 07/30] dt-bindings: w1-eeprom: ds24xxx: create bindings
A sandbox driver for a onewire EEPROM is added in patch: [PATCH v2 08/30] W1-EEPROM: add sandbox driver
Bindings for the sandbox eeprom driver added in patch: [PATCH v2 09/30] dt-bindings: w1-eeprom: eep_sandbox: create bindings
A command is added for the onewire protocol in patch: [PATCH v2 10/30] w1: add command for onewire protocol
Pinctrl driver for sandbox was updated to add a new group and function for w1: [PATCH v2 11/30] pinctrl: sandbox: add gpio onewire w1 group
Add a node in sandbox DT to have a test node for sandbox. [PATCH v2 12/30] sandbox: DTS: w1: add node for one wire interface on GPIO
The defconfig for sandbox is updated to include the drivers: [PATCH v2 13/30] configs: sandbox: add onewire w1 and sandbox eeprom
Configuration for sama5d2 xplained is updated in patch: [PATCH v2 14/30] configs: sama5d2_xplained: add onewire and eeprom
Configuration for sama5d3 xplained is updated in patch: [PATCH v2 15/30] configs: sama5d3_xplained: add onewire and eeprom
Configuration for sama5d27_som1_ek is updated in patch: [PATCH v2 16/30] configs: sama5d27_som1_ek: add onewire and eeprom drivers
Configuration for sama5d2 ptc is updated in patch: [PATCH v2 17/30] configs: sama5d2_ptc_ek: add onewire and eeprom drivers
Pda detection is added in the common part for atmel boards: [PATCH v2 18/30] board: atmel: add support for pda detection
Specifically add it for Sama5d2 xplained board in patch: [PATCH v2 19/30] board: sama5d2_xplained: add pda detect call at init time
Specifically add it for Sama5d3 xplained board in patch: [PATCH v2 20/30] board: sama5d3_xplained: add pda detect call at init time
Specifically add it for Sama5d27 som1 ek board in patch: [PATCH v2 21/30] board: sama5d27_som1_ek: add pda detect call at init time
Specifically add it for Sama5d27 ptc ek board in patch: [PATCH v2 22/30] board: sama5d2_ptc_ek: add pda detect call at init time
Add support for overlays for sama5d2 xplained config in patch: [PATCH v2 23/30] configs: sama5d2_xplained: add fdt overlay support
Add support for overlays for sama5d3 xplained config in patch: [PATCH v2 24/30] configs: sama5d3_xplained: add fdt overlay support
Add support for overlays for sama5d2 ptc ek config in patch: [PATCH v2 25/30] configs: sama5d2_ptc_ek: add fdt overlay support
Add support for overlays for sama5d2 som1 ek config in patch: [PATCH v2 26/30] configs: sama5d27_som1_ek: add fdt overlay support
The DT for the SAMA5D2 Soc and xplained is updated to include a onewire node. This is done in patch: [PATCH v2 27/30] ARM: dts: at91: sama5d2_xplained: add onewire connector
The DT for the SAMA5D3 Soc and xplained is updated to include a onewire node. This is done in patch: [PATCH v2 28/30] ARM: dts: at91: sama5d3_xplained: add onewire connector
The DT for sama5d27 som1 ek is updated to include a onewire node. This is done in patch: [PATCH v2 29/30] ARM: dts: at91: sama5d27_som1_ek: add onewire connector for LCD eeprom
The DT for sama5d2 ptc ek is updated to include a onewire node. This is done in patch: [PATCH v2 30/30] ARM: dts: at91: sama5d2_ptc: add onewire connector for LCD eeprom
Changes in v2: - added support for two more boards: the PTC ek and the SOM1 ek. - modified the enumerate mechanism, to search through devicetree nodes, the memories are now in device tree, as suggested by Simon Glass. When a serial number is read from the bus, the driver will match it with a corresponding node in device tree. - modified the probe mechanism for the bus, when trying to get the bus use a different get function that will also probe the driver, regardless of present aliases in DT. - added bindings for ds24xxx driver and eep_sandbox, because they are referenced from devicetree now.
Eugen Hristev (26): dt-bindings: W1: w1-gpio: added bindings for w1-gpio w1: identify devices with w1-eeprom uclass dt-bindings: w1-eeprom: ds24xxx: create bindings W1-EEPROM: add sandbox driver dt-bindings: w1-eeprom: eep_sandbox: create bindings w1: add command for onewire protocol pinctrl: sandbox: add gpio onewire w1 group sandbox: DTS: w1: add node for one wire interface on GPIO configs: sandbox: add onewire w1 and sandbox eeprom configs: sama5d2_xplained: add onewire and eeprom drivers configs: sama5d3_xplained: add onewire and eeprom drivers configs: sama5d27_som1_ek: add onewire and eeprom drivers configs: sama5d2_ptc_ek: add onewire and eeprom drivers board: atmel: add support for pda detection board: sama5d2_xplained: add pda detect call at init time board: sama5d3_xplained: add pda detect call at init time board: sama5d27_som1_ek: add pda detect call at init time board: sama5d2_ptc_ek: add pda detect call at init time configs: sama5d2_xplained: add fdt overlay support configs: sama5d3_xplained: add fdt overlay support configs: sama5d2_ptc_ek: add fdt overlay support configs: sama5d27_som1_ek: add fdt overlay support ARM: dts: at91: sama5d2_xplained: add onewire connector for LCD eeprom ARM: dts: at91: sama5d3_xplained: add onewire connector for LCD eeprom ARM: dts: at91: sama5d27_som1_ek: add onewire connector for LCD eeprom ARM: dts: at91: sama5d2_ptc: add onewire connector for LCD eeprom
Maxime Ripard (4): w1: Add 1-Wire uclass w1: Add 1-Wire gpio driver W1-EEPROM: Add an W1-EEPROM uclass for 1 wire EEPROMs W1-EEPROM: add support for Maxim DS24 eeprom families
arch/arm/dts/at91-sama5d27_som1_ek.dts | 17 ++ arch/arm/dts/at91-sama5d2_ptc_ek.dts | 17 ++ arch/arm/dts/at91-sama5d2_xplained.dts | 17 ++ arch/arm/dts/at91-sama5d3_xplained.dts | 17 ++ arch/arm/dts/sama5d2.dtsi | 5 + arch/arm/dts/sama5d3.dtsi | 5 + arch/arm/mach-at91/Kconfig | 2 + arch/sandbox/dts/sandbox.dts | 20 ++ board/atmel/common/board.c | 55 +++++ board/atmel/sama5d27_som1_ek/sama5d27_som1_ek.c | 3 + board/atmel/sama5d2_ptc_ek/sama5d2_ptc_ek.c | 10 + board/atmel/sama5d2_xplained/sama5d2_xplained.c | 3 + board/atmel/sama5d3_xplained/sama5d3_xplained.c | 10 + cmd/Kconfig | 7 + cmd/Makefile | 1 + cmd/w1.c | 121 +++++++++++ configs/sama5d27_som1_ek_mmc_defconfig | 5 + configs/sama5d2_ptc_ek_mmc_defconfig | 5 + configs/sama5d2_ptc_ek_nandflash_defconfig | 5 + configs/sama5d2_xplained_mmc_defconfig | 5 + configs/sama5d2_xplained_spiflash_defconfig | 5 + configs/sama5d3_xplained_mmc_defconfig | 5 + configs/sama5d3_xplained_nandflash_defconfig | 5 + configs/sandbox_defconfig | 4 + doc/device-tree-bindings/w1-eeprom/ds24xxx.txt | 37 ++++ doc/device-tree-bindings/w1-eeprom/eep_sandbox.txt | 34 +++ doc/device-tree-bindings/w1/w1-gpio.txt | 40 ++++ drivers/Kconfig | 4 + drivers/Makefile | 2 + drivers/pinctrl/pinctrl-sandbox.c | 3 + drivers/w1-eeprom/Kconfig | 29 +++ drivers/w1-eeprom/Makefile | 5 + drivers/w1-eeprom/ds24xxx.c | 55 +++++ drivers/w1-eeprom/eep_sandbox.c | 61 ++++++ drivers/w1-eeprom/w1-eeprom-uclass.c | 109 ++++++++++ drivers/w1/Kconfig | 25 +++ drivers/w1/Makefile | 3 + drivers/w1/w1-gpio.c | 158 ++++++++++++++ drivers/w1/w1-uclass.c | 239 +++++++++++++++++++++ include/dm/uclass-id.h | 2 + include/w1-eeprom.h | 33 +++ include/w1.h | 37 ++++ 42 files changed, 1225 insertions(+) create mode 100644 cmd/w1.c create mode 040000 doc/device-tree-bindings/w1-eeprom create mode 100644 doc/device-tree-bindings/w1-eeprom/ds24xxx.txt create mode 100644 doc/device-tree-bindings/w1-eeprom/eep_sandbox.txt create mode 040000 doc/device-tree-bindings/w1 create mode 100644 doc/device-tree-bindings/w1/w1-gpio.txt create mode 040000 drivers/w1-eeprom create mode 100644 drivers/w1-eeprom/Kconfig create mode 100644 drivers/w1-eeprom/Makefile create mode 100644 drivers/w1-eeprom/ds24xxx.c create mode 100644 drivers/w1-eeprom/eep_sandbox.c create mode 100644 drivers/w1-eeprom/w1-eeprom-uclass.c create mode 040000 drivers/w1 create mode 100644 drivers/w1/Kconfig create mode 100644 drivers/w1/Makefile create mode 100644 drivers/w1/w1-gpio.c create mode 100644 drivers/w1/w1-uclass.c create mode 100644 include/w1-eeprom.h create mode 100644 include/w1.h