Treat both negative and zero return values from clk_round_rate() as
errors.  This is needed since subsequent patches will convert
clk_round_rate()'s return value to be an unsigned type, rather than a
signed type, since some clock sources can generate rates higher than
(2^31)-1 Hz.

Eventually, when calling clk_round_rate(), only a return value of zero
will be considered a error.  All other values will be considered valid
rates.  The comparison against values less than 0 is kept to preserve
the correct behavior in the meantime.
Signed-off-by: NPaul Walmsley <paul@pwsan.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Håvard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NHans-Christian Egtvedt <egtvedt@samfundet.no>

Today we mix pdata and drivers data in the struct atmel_lcdfb_info
Fix it and introduce a new struct atmel_lcdfb_pdata for platform data only
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Both at91 and avr32 defines its own platform data structure for
the macb driver and both share common structures though at91
includes a currently unused phy_irq_pin.  Create a common
macb_platform_data for macb that both at91 and avr32 can use.  In
future we can use this to support other architectures that use the
same IP block with the macb driver.

v2: rename eth_platform_data to macb_platform_data and allow at91_ether
to share the platform data with macb.
Signed-off-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

clk_get() returns ERR_PTR() on error, not NULL.
Signed-off-by: NVasiliy Kulikov <segoon@openwall.com>
Acked-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

The ezLCD+101 board (to which an favr-32 is fitted) has a long,
unshielded, nasty lead between the touch panel and the ads7843 touch
controller.  In order to get satisfactory response then, we need to
employ every noise-reduction trick in the driver's arsenal.  After
extensive fiddling I've found some good settings:

1) We keep vref on all the time to dramatically reduce settling times
(at the cost of a tiny increase in power consumption).

2) Despite 1 the settling time is still non-zero.  500uS is plenty of
time for the signals to settle

3) Despite 1 and 2 there's still a little bit of noise around.  By
setting a pen recheck delay we make the panel feel less touchy and
twitchy.

Someone with more time and patience myself might be able to tune this
numbers further but these settings are now perfectly acceptable for
normal use.

Tested on ezLCD+101 though should only improve response on other ezLCD+/
favr-32 boards too.
Signed-off-by: NBen Nizette <bn@niasdigital.com>
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

Adds extra parameter to AT32 at32_map_usart(), so as to reserve
RTS/CTS/CLK pins.

All boards under arch/avr32/boards have been updated (trivial change), but
not all have been tested.
Signed-off-by: NPeter Ma <pma@mediamatech.com>
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

This patch will adjust the setup the DMA controller for the Audio
Bistream DAC in the at32ap700x machine code. This setup matches the new
ALSA driver for the ABDAC.

Tested on ATSTK1006 + ATSTK1000.

This patch will setup the needed platform data for the Audio Bistream
DAC used by the Favr-32 board.
Signed-off-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
[haavard.skinnemoen@atmel.com: fold board code update]
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

at32_add_device_mci() will refuse to add the mci device if the data
parameter is NULL. Fix up the favr-32 and hammerhead boards so that this
doesn't happen.
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: Alex Raimondi <mailinglist@miromico.ch>
Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

at32_reserve_pin now takes an u32 bitmask rather than a single pin.
This allows to reserve multiple pins at once.

Remove (undocumented) SDCS (pin PE26) from reservation in board
setup code.
Signed-off-by: NAlex Raimondi <raimondi@miromico.ch>
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

at32_add_system_devices() is deprecated, so remove the call to it.
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

The favr-32 board code still refers to the old asm/arch header files
which were moved to mach/ some time ago.
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>

This patch adds support for the Favr-32 board made by EarthLCD.

This kit, which is also called ezLCD-101, has a 10.4" touch screen LCD panel,
16 MB 32-bit SDRAM, 8 MB parallel flash, Ethernet, audio out, USB device,
SD-card slot, USART and various other connectors for cennecting stuff to SPI,
I2C, GPIO, etc.
Signed-off-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>