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path: root/drivers/atmel_usart.c
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2007-04-14AVR32: Resource management rewriteHaavard Skinnemoen
Rewrite the resource management code (i.e. I/O memory, clock gating, gpio) so it doesn't depend on any global state. This is necessary because this code is heavily used before relocation to RAM, so we can't write to any global variables. As an added bonus, this makes u-boot's memory footprint a bit smaller, although some functionality has been left out; all clocks are enabled all the time, and there's no checking for gpio line conflicts. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2006-10-24Add common serial driver for Atmel AT32 and AT91 chipsWolfgang Denk
Patch by Haavard Skinnemoen, 06 Sep 2006 This is a first attempt at creating a common serial driver for Atmel chips. For now, it supports the AT32AP7000 AVR32 chip, but it should be possible to support AT91RM9200 and other ARM-based chips with some minor modifications. There's nothing fundamentally AVR32-specific in this driver, but it does use some features which are currently only defined for the AT32AP CPU port: * pm_get_clock_freq: Obtain the clock frequency of a given domain * gd->console_uart: A "struct device" containing information about register mappings, gpio resources and clocks associated with the UART device. For more information about these features, please see the "AT32AP CPU" patch.