c5fa4fdcdb
This patch adds a generic target for SPEAr3xx machines that can be configured via the device-tree. Currently the following devices are supported via the devicetree: - VIC interrupts - PL011 UART - PL061 GPIO - PL110 CLCD - SP805 WDT - Synopsys DW I2C - Synopsys DW ethernet - ST FSMC-NAND - ST SPEAR-SMI - ST SPEAR-KEYBOARD - ST SPEAR-RTC - ARASAN SDHCI-SPEAR - SPEAR-EHCI - SPEAR-OHCI Other peripheral devices will follow in later patches. This also removes IO_ADDRESS macro and creates 16 MB static mappings instead of 4K for individual peripherals. This is done to have efficient TLB lookup for any I/O windows that are located closely together. ioremap() on this range will return this mapping only instead of creating another. Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
62 lines
1.8 KiB
Plaintext
62 lines
1.8 KiB
Plaintext
SPEAr ARM Linux Overview
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==========================
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Introduction
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------------
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SPEAr (Structured Processor Enhanced Architecture).
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weblink : http://www.st.com/spear
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The ST Microelectronics SPEAr range of ARM9/CortexA9 System-on-Chip CPUs are
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supported by the 'spear' platform of ARM Linux. Currently SPEAr300,
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SPEAr310, SPEAr320 and SPEAr600 SOCs are supported. Support for the SPEAr13XX
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series is in progress.
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Hierarchy in SPEAr is as follows:
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SPEAr (Platform)
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- SPEAr3XX (3XX SOC series, based on ARM9)
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- SPEAr300 (SOC)
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- SPEAr300 Evaluation Board
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- SPEAr310 (SOC)
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- SPEAr310 Evaluation Board
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- SPEAr320 (SOC)
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- SPEAr320 Evaluation Board
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- SPEAr6XX (6XX SOC series, based on ARM9)
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- SPEAr600 (SOC)
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- SPEAr600 Evaluation Board
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- SPEAr13XX (13XX SOC series, based on ARM CORTEXA9)
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- SPEAr1300 (SOC)
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Configuration
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-------------
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A generic configuration is provided for each machine, and can be used as the
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default by
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make spear600_defconfig
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make spear300_defconfig
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make spear310_defconfig
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make spear320_defconfig
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Layout
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------
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The common files for multiple machine families (SPEAr3XX, SPEAr6XX and
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SPEAr13XX) are located in the platform code contained in arch/arm/plat-spear
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with headers in plat/.
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Each machine series have a directory with name arch/arm/mach-spear followed by
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series name. Like mach-spear3xx, mach-spear6xx and mach-spear13xx.
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Common file for machines of spear3xx family is mach-spear3xx/spear3xx.c and for
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spear6xx is mach-spear6xx/spear6xx.c. mach-spear* also contain soc/machine
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specific files, like spear300.c, spear310.c, spear320.c and spear600.c.
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mach-spear* doesn't contains board specific files as they fully support
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Flattened Device Tree.
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Document Author
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---------------
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Viresh Kumar <viresh.kumar@st.com>, (c) 2010-2012 ST Microelectronics
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