This issue covered by this doc appears to be fixed, so let's remove the README. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: York Sun <york.sun@nxp.com> Acked-by: Andreas Bießmann <andreas@biessmann.org>master
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New C structure AT91 SoC access |
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================================= |
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The goal |
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-------- |
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Currently the at91 arch uses hundreds of address defines and special |
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at91_xxxx_write/read functions to access the SOC. |
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The u-boot project perferred method is to access memory mapped hw |
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regisister via a c structure. |
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e.g. old |
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*AT91C_PIOA_IDR = AT91_PMX_AA_TWD | AT91_PMX_AA_TWCK; |
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*AT91C_PIOC_PUDR = AT91_PMX_AA_TWD | AT91_PMX_AA_TWCK; |
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*AT91C_PIOC_PER = AT91_PMX_AA_TWD | AT91_PMX_AA_TWCK; |
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*AT91C_PIOC_OER = AT91_PMX_AA_TWD | AT91_PMX_AA_TWCK; |
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*AT91C_PIOC_PIO = AT91_PMX_AA_TWD | AT91_PMX_AA_TWCK; |
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at91_sys_write(AT91_RSTC_CR, |
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AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST); |
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e.g new |
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pin = AT91_PMX_AA_TWD | AT91_PMX_AA_TWCK; |
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writel(pin, &pio->pioa.idr); |
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writel(pin, &pio->pioa.pudr); |
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writel(pin, &pio->pioa.per); |
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writel(pin, &pio->pioa.oer); |
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writel(pin, &pio->pioa.sodr); |
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writel(AT91_RSTC_KEY | AT91_RSTC_CR_PROCRST | |
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AT91_RSTC_CR_PERRST, &rstc->cr); |
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The method for updating |
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------------------------ |
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1. add's the temporary CONFIG_AT91_LEGACY to all at91 board configs |
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2. Display a compile time warning, if the board has not been converted |
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3. add new structures for SoC access |
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4. Convert arch, driver and boards file to new SoC |
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5. remove legacy code, if all boards and drives are ready |
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2013-10-30 Andreas Bießmann <andreas@biessmann.org>: |
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The goal is almost reached, we could remove the CONFIG_AT91_LEGACY switch but |
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remain the CONFIG_ATMEL_LEGACY switch until the GPIO disaster is fixed. The |
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AT91 spi driver has also some CONFIG_ATMEL_LEGACY stuff left, so another point |
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to fix until this README can be removed. |
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