Re: [PATCH v1 2/3] ARM64 LPC: LPC driver implementation

Rongrong Zou
2015-12-29T14:06:13Z

在 2015/12/29 21:51, Arnd Bergmann 写道:
> On Tuesday 29 December 2015 21:33:51 Rongrong Zou wrote:
>> We only implement io cycles here, we hook the lpc_io_write_byte
>> and lpc_io_read_byte to inb/outb. So the drivers(ipmi/uart) which access
>> the legacy ISA I/O port need no modification.
>>
>> The low pin count specification is at
>> http://www.intel.com/design/chipsets/industry/lpc.htm
>>
>> Signed-off-by: Rongrong Zou <zourongrong@gmail.com>
>
> I'm slightly confused here: I thought this driver was hisilicon specific.
> Is the MMIO register layout that is used in this hardware actually standardized
> in a way that the driver also works for all other implementations?

The register defined is not standardized. other vendors may define their own
registers.

>
>> +
>> +static struct lpc_dev *lpc_dev;
>> +
>> +int lpc_master_write(unsigned int slv_access_mode, unsigned int cycle_type,
>> + unsigned int addr, unsigned char *buf, unsigned int len)
>> +{
>
> Please make all function definitions 'static' so we don't accidentally get
> other users that bypass the proper interface.
>
> Arnd
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