On 19/03/15 14:22, Ben Hutchings wrote:
> On Wed, 2015-03-18 at 15:53 +0000, Ben Dooks wrote:
>> Change the __raw IO functions to endian agnostic relaxed ones to allow
>> the driver to function on big endian ARM systems.
>>
>> Signed-off-by: Ben Dooks <ben.do...@codethink.co.uk>
>> --
>> CC: Ludovic Desroches <ludovic.desroc...@atmel.com>
>> CC: Chris Ball <ch...@printf.net>
>> CC: Ulf Hansson <ulf.hans...@linaro.org>
>> CC: linux-mmc@vger.kernel.org
>> ---
>> drivers/mmc/host/atmel-mci-regs.h | 9 ++++++++-
>> 1 file changed, 8 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mmc/host/atmel-mci-regs.h
>> b/drivers/mmc/host/atmel-mci-regs.h
>> index c97001e..711bb53 100644
>> --- a/drivers/mmc/host/atmel-mci-regs.h
>> +++ b/drivers/mmc/host/atmel-mci-regs.h
>> @@ -135,10 +135,17 @@
>> #define ATMCI_REGS_SIZE 0x100
>>
>> /* Register access macros */
>> -#define atmci_readl(port,reg) \
>> +#ifdef CONFIG_AVR32
>> +#define atmci_readl(port,reg) \
>> __raw_readl((port)->regs + reg)
>> #define atmci_writel(port,reg,value) \
>> __raw_writel((value), (port)->regs + reg)
>> +#else
>> +#define atmci_readl(port,reg) \
>> + readl_relaxed((port)->regs + reg)
>> +#define atmci_writel(port,reg,value) \
>> + writel_relaxed((value), (port)->regs + reg)
>> +#endif
>
> This pattern is repeated in a lot of drivers; is it worth defining
> atmel_{read,write}l_relaxed() in a common header?
>
> #ifdef CONFIG_AVR32
>
> /* CPU and peripherals are both big-endian, so don't byte-swap */
> #define atmel_readl_relaxed(addr) __raw_readl(addr)
> #define atmel_writel_relaxed(value, addr) __raw_writel(value, addr)
>
> #else
>
> /* Peripherals are little-endian, so byte-swap if CPU isn't */
> #define atmel_readl_relaxed(addr) readl_relaxed(addr)
> #define atmel_writel_relaxed(value, addr) writel_relaxed(value, addr)
>
> #endif
>
> Ben.
Hi, I think it will probably be a good idea to have an avr32/at91
read/write functions however I will put this forward as a separate
series as it will require both avr32 and at91 maintainers as well
as driver updates.
how about:
atmel_readl_onchip{b,w,l}
atmel_writel_onchip{b,w,l}
--
Ben Dooks http://www.codethink.co.uk/
Senior Engineer Codethink - Providing Genius
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