diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.fsl-trustzone-components | 25 | ||||
| -rw-r--r-- | doc/README.kconfig | 132 | ||||
| -rw-r--r-- | doc/README.scrapyard | 41 | ||||
| -rw-r--r-- | doc/device-tree-bindings/exynos/emmc-reset.txt | 15 | ||||
| -rw-r--r-- | doc/device-tree-bindings/gpio/gpio.txt | 5 | ||||
| -rw-r--r-- | doc/driver-model/spi-howto.txt | 4 |
6 files changed, 101 insertions, 121 deletions
diff --git a/doc/README.fsl-trustzone-components b/doc/README.fsl-trustzone-components new file mode 100644 index 0000000..a3afd1f --- /dev/null +++ b/doc/README.fsl-trustzone-components @@ -0,0 +1,25 @@ +Freescale ARM64 SoCs like LS2085A have ARM TrustZone components like +TZPC-BP147 (TrustZone Protection Controller) and TZASC-400 (TrustZone +Address Space Controller). + +While most of the configuration related programming of these peripherals +is left to a root-of-trust security software layer (running in EL3 +privilege mode), but still some configurations of these peripherals +might be required while the bootloader is executing in EL3 privilege +mode. The following sections define how to turn on these features for +LS2085A like SoCs. + +TZPC-BP147 (TrustZone Protection Controller) +============================================ +- Depends on CONFIG_FSL_TZPC_BP147 configuration flag. +- Separates Secure World and Normal World on-chip RAM (OCRAM) spaces. +- Provides a programming model to set access control policy via the TZPC + TZDECPROT Registers. + +TZASC-400 (TrustZone Address Space Controller) +============================================== +- Depends on CONFIG_FSL_TZASC_400 configuration flag. +- Separates Secure World and Normal World external memory spaces for bus masters + such as processors and DMA-equipped peripherals. +- Supports 8 fully programmable address regions, initially inactive at reset, + and one base region, always active, that covers the remaining address space. diff --git a/doc/README.kconfig b/doc/README.kconfig index 69dc459..288d17d 100644 --- a/doc/README.kconfig +++ b/doc/README.kconfig @@ -17,109 +17,45 @@ source directory for a basic specification of Kconfig. Difference from Linux's Kconfig ------------------------------- -The biggest difference between Linux Kernel and U-Boot in terms of the -configuration is that U-Boot has to configure multiple boot images per board: -Normal, SPL, TPL. -Kconfig functions need to be expanded for U-Boot to handle multiple images. -The files scripts/kconfig/* were imported from Linux Kernel and adjusted -for that purpose. +Here are some worth-mentioning configuration targets. -See below for how each configuration target works in U-Boot: +- silentoldconfig -- config, nconfig, menuconfig, xconfig, gconfig + This target updates .config, include/generated/autoconf.h and + include/configs/* as in Linux. In U-Boot, it also does the followings + for the compatibility with the old configuration system: - These targets are used to configure Normal and create (or modify) the - .config file. For SPL configuration, the configutation targets are prefixed - with "spl/", for example "make spl/config", "make spl/menuconfig", etc. - Those targets create or modify the spl/.config file. Likewise, run - "make tpl/config", "make tpl/menuconfig", etc. for TPL. + * create a symbolic link "arch/${ARCH}/include/asm/arch" pointing to + the SoC/CPU specific header directory + * create include/config.h + * create include/autoconf.mk + * create spl/include/autoconf.mk (SPL and TPL only) + * create tpl/include/autoconf.mk (TPL only) -- silentoldconfig + If we could completely switch to Kconfig in a long run + (i.e. remove all the include/configs/*.h), those additional processings + above would be removed. - This target updates .config, include/generated/autoconf.h and - include/configs/*. In U-Boot, the same thing is done for SPL, TPL, - if supported by the target board. Depending on whether CONFIG_SPL and - CONFIG_TPL are defined, "make silentoldconfig" iterates three times at most - changing the work directory. - - To sum up, "make silentoldconfig" possibly updates: - - .config, include/generated/autoconf.h, include/config/* - - spl/.config, spl/include/generated/autoconf.h, spl/include/config/* - (in case CONFIG_SPL=y) - - tpl/.config, tpl/include/generated/autoconf.h, tpl/include/config/* - (in case CONFIG_TPL=y) - -- defconfig, <board>_defconfig - - The target "<board>_defconfig" is used to create the .config based on the - file configs/<board>_defconfig. The "defconfig" target is the same - except it checks for a file specified with KBUILD_DEFCONFIG environment. - - Note: - The defconfig files are placed under the "configs" directory, - not "arch/$(ARCH)/configs". This is because "ARCH" is not necessarily - given from the command line for the U-Boot configuration and build. - - The defconfig file format in U-Boot has the special syntax; each line has - "<condition>:" prefix to show which image(s) the line is valid for. - For example, - - CONFIG_FOO=100 - S:CONFIG_FOO=200 - T:CONFIG_FOO=300 - ST:CONFIG_BAR=y - +S:CONFIG_BAZ=y - +T:CONFIG_QUX=y - +ST:CONFIG_QUUX=y - - Here, the "<condition>:" prefix is one of: - None - the line is valid only for Normal image - S: - the line is valid only for SPL image - T: - the line is valid only for TPL image - ST: - the line is valid for SPL and TPL images - +S: - the line is valid for Normal and SPL images - +T: - the line is valid for Normal and TPL images - +ST: - the line is valid for Normal, SPL and TPL images - - So, if neither CONFIG_SPL nor CONFIG_TPL is defined, the defconfig file - has no "<condition>:" part and therefore has the same form as in Linux. - From the example defconfig shown above, three separete configuration sets - are generated and used for creating .config, spl/.config and tpl/.config. - - - Input for the default configuration of Normal - CONFIG_FOO=100 - CONFIG_BAZ=y - CONFIG_QUX=y - CONFIG_QUUX=y - - - Input for the default configuration of SPL - CONFIG_FOO=200 - CONFIG_BAR=y - CONFIG_BAZ=y - CONFIG_QUUX=y - - - Input for the default configuration of TPL - CONFIG_FOO=300 - CONFIG_BAR=y - CONFIG_QUX=y - CONFIG_QUUX=y - -- savedefconfig - - This is the reverse operation of "make defconfig". If neither CONFIG_SPL - nor CONFIG_TPL is defined in the .config file, it works like "savedefconfig" - in Linux Kernel: creates the minimal set of config based on the .config - and saves it into the "defconfig" file. If CONFIG_SPL (and CONFIG_TPL) is - defined, the common lines among .config, spl/.config (and tpl/.config) are - coalesced together with "<condition:>" prefix for each line as shown above. - This file can be used as an input of "defconfig" target. +- defconfig + + In U-Boot, "make defconfig" is a shorthand of "make sandbox_defconfig" + +- <board>_defconfig + + Now it works as in Linux. + The prefixes such as "+S:" in *_defconfig are deprecated. + You can simply remove the prefixes. Do not add them for new boards. - <board>_config This does not exist in Linux's Kconfig. + "make <board>_config" works the same as "make <board>_defconfig". Prior to Kconfig, in U-Boot, "make <board>_config" was used for the - configuration. It is still supported for backward compatibility and - its behavior is the same as "make <board>_defconfig". + configuration. It is still supported for backward compatibility, so + we do not need to update the distro recipes. + + +The other configuration targets work as in Linux Kernel. Migration steps to Kconfig @@ -137,14 +73,10 @@ based configuration as follows: Configuration files for use in C sources - include/generated/autoconf.h (generated by Kconfig for Normal) - - spl/include/generated/autoconf.h (generated by Kconfig for SPL) - - tpl/include/generated/autoconf.h (generated by Kconfig for TPL) - include/configs/<board>.h (exists for all boards) Configuration file for use in makefiles - - include/config/auto.conf (generated by Kconfig for Normal) - - spl/include/config/auto.conf (generated by Kconfig for SPL) - - tpl/include/config/auto.conf (generated by Kconfig for TPL) + - include/config/auto.conf (generated by Kconfig) - include/autoconf.mk (generated by the old config for Normal) - spl/include/autoconfig.mk (generated by the old config for SPL) - tpl/include/autoconfig.mk (generated by the old config for TPL) @@ -215,8 +147,8 @@ TODO CONFIG_SYS_EXTRA_OPTIONS should not be used for new boards. - In the pre-Kconfig, a single board had multiple entries in the boards.cfg - file with differences in the option fields. The correspoing defconfig files - were auto-generated when switching to Kconfig. Now we have too many + file with differences in the option fields. The corresponding defconfig + files were auto-generated when switching to Kconfig. Now we have too many defconfig files compared with the number of the supported boards. It is recommended to have only one defconfig per board and allow users to select the config options. diff --git a/doc/README.scrapyard b/doc/README.scrapyard index 952ab87..cd8f4ae 100644 --- a/doc/README.scrapyard +++ b/doc/README.scrapyard @@ -12,23 +12,30 @@ The list should be sorted in reverse chronological order. Board Arch CPU Commit Removed Last known maintainer/contact ================================================================================================= -icecube_5200 powerpc mpc5xxx - - Wolfgang Denk <wd@denx.de> -Lite5200 powerpc mpc5xxx - - -cpci5200 powerpc mpc5xxx - - Reinhard Arlt <reinhard.arlt@esd-electronics.com> -mecp5200 powerpc mpc5xxx - - Reinhard Arlt <reinhard.arlt@esd-electronics.com> -pf5200 powerpc mpc5xxx - - Reinhard Arlt <reinhard.arlt@esd-electronics.com> -PM520 powerpc mpc5xxx - - Josef Wagner <Wagner@Microsys.de> -Total5200 powerpc mpc5xxx - - -CATcenter powerpc ppc4xx - - -PPChameleonEVB powerpc ppc4xx - - Andrea "llandre" Marson <andrea.marson@dave-tech.it> -P2020DS powerpc mpc85xx - - -P2020COME powerpc mpc85xx - - Ira W. Snyder <iws@ovro.caltech.edu> -P2020RDB powerpc mpc85xx - - Poonam Aggrwal <poonam.aggrwal@freescale.com> -P2010RDB powerpc mpc85xx - - -P1020RDB powerpc mpc85xx - - -P1011RDB powerpc mpc85xx - - -MPC8360EMDS powerpc mpc83xx - - Dave Liu <daveliu@freescale.com> -MPC8360ERDK powerpc mpc83xx - - Anton Vorontsov <avorontsov@ru.mvista.com> +hawkboard arm arm926ejs - - Syed Mohammed Khasim <sm.khasim@gmail.com>:Sughosh Ganu <urwithsughosh@gmail.com> +tnetv107x arm arm1176 - - Chan-Taek Park <c-park@ti.com> +a320evb arm arm920t - - Po-Yu Chuang <ratbert@faraday-tech.com> +cm4008 arm arm920t - - Greg Ungerer <greg.ungerer@opengear.com> +cm41xx arm arm920t - - +dkb arm arm926ejs - - Lei Wen <leiwen@marvell.com> +jadecpu arm arm926ejs - - Matthias Weisser <weisserm@arcor.de> +icecube_5200 powerpc mpc5xxx 37b608a5 2015-01-23 Wolfgang Denk <wd@denx.de> +Lite5200 powerpc mpc5xxx 37b608a5 2015-01-23 +cpci5200 powerpc mpc5xxx 37b608a5 2015-01-23 Reinhard Arlt <reinhard.arlt@esd-electronics.com> +mecp5200 powerpc mpc5xxx 37b608a5 2015-01-23 Reinhard Arlt <reinhard.arlt@esd-electronics.com> +pf5200 powerpc mpc5xxx 37b608a5 2015-01-23 Reinhard Arlt <reinhard.arlt@esd-electronics.com> +PM520 powerpc mpc5xxx a258e732 2015-01-23 Josef Wagner <Wagner@Microsys.de> +Total5200 powerpc mpc5xxx ad734f7d 2015-01-23 +CATcenter powerpc ppc4xx 5344cc1a 2015-01-23 +PPChameleonEVB powerpc ppc4xx 5344cc1a 2015-01-23 Andrea "llandre" Marson <andrea.marson@dave-tech.it> +P2020DS powerpc mpc85xx 168dcc6c 2015-01-23 +P2020COME powerpc mpc85xx 89123536 2015-01-23 Ira W. Snyder <iws@ovro.caltech.edu> +P2020RDB powerpc mpc85xx 743d4815 2015-01-23 Poonam Aggrwal <poonam.aggrwal@freescale.com> +P2010RDB powerpc mpc85xx 743d4815 2015-01-23 +P1020RDB powerpc mpc85xx 743d4815 2015-01-23 +P1011RDB powerpc mpc85xx 743d4815 2015-01-23 +MPC8360EMDS powerpc mpc83xx 8d1e3cb1 2015-01-23 Dave Liu <daveliu@freescale.com> +MPC8360ERDK powerpc mpc83xx 8d1e3cb1 2015-01-23 Anton Vorontsov <avorontsov@ru.mvista.com> P3G4 powerpc 74xx_7xx d928664f 2015-01-16 Wolfgang Denk <wd@denx.de> ZUMA powerpc 74xx_7xx d928664f 2015-01-16 Nye Liu <nyet@zumanetworks.com> ppmc7xx powerpc 74xx_7xx d928664f 2015-01-16 diff --git a/doc/device-tree-bindings/exynos/emmc-reset.txt b/doc/device-tree-bindings/exynos/emmc-reset.txt new file mode 100644 index 0000000..5e7ba26 --- /dev/null +++ b/doc/device-tree-bindings/exynos/emmc-reset.txt @@ -0,0 +1,15 @@ +* Samsung eMMC reset + +Some exynos boards require special handling of nRESET_OUT line for eMMC memory +to perform complete reboot. + +Required properties: +- compatible: should be "samsung,emmc-reset" +- reset-gpio: gpio chip for eMMC reset. + +Example: + +emmc-reset { + compatible = "samsung,emmc-reset"; + reset-gpio = <&gpk1 2 0>; +}; diff --git a/doc/device-tree-bindings/gpio/gpio.txt b/doc/device-tree-bindings/gpio/gpio.txt index b9bd1d6..f7a158d 100644 --- a/doc/device-tree-bindings/gpio/gpio.txt +++ b/doc/device-tree-bindings/gpio/gpio.txt @@ -69,7 +69,8 @@ GPIO pin number, and GPIO flags as accepted by the "qe_pio_e" gpio-controller. ---------------------------------- A gpio-specifier should contain a flag indicating the GPIO polarity; active- -high or active-low. If it does, the follow best practices should be followed: +high or active-low. If it does, the following best practices should be +followed: The gpio-specifier's polarity flag should represent the physical level at the GPIO controller that achieves (or represents, for inputs) a logically asserted @@ -147,7 +148,7 @@ contains information structures as follows: numeric-gpio-range ::= <pinctrl-phandle> <gpio-base> <pinctrl-base> <count> named-gpio-range ::= <pinctrl-phandle> <gpio-base> '<0 0>' - gpio-phandle : phandle to pin controller node. + pinctrl-phandle : phandle to pin controller node gpio-base : Base GPIO ID in the GPIO controller pinctrl-base : Base pinctrl pin ID in the pin controller count : The number of GPIOs/pins in this range diff --git a/doc/driver-model/spi-howto.txt b/doc/driver-model/spi-howto.txt index 5bc29ad..ee4abf4 100644 --- a/doc/driver-model/spi-howto.txt +++ b/doc/driver-model/spi-howto.txt @@ -40,8 +40,8 @@ with only minor changes: Add these to your board config: -#define CONFIG_DM_SPI -#define CONFIG_DM_SPI_FLASH +CONFIG_DM_SPI +CONFIG_DM_SPI_FLASH 2. Add the skeleton |