Re: [PATCH v3 14/36] mtd: st_spi_fsm: Add device-tree binding documentation

Linus Walleij
2013-12-03T12:22:42Z

On Tue, Dec 3, 2013 at 12:31 PM, Lee Jones <lee.jones@linaro.org> wrote:
> On Tue, 03 Dec 2013, Linus Walleij wrote:

>> So it can be in <linux/mfd/my-sysconfig-regs.h> as
>> a
>>
>> #define MY_SYSCON_V1_BOOT_DEV_REG 0x958
>> #define MY_SYSCON_V1_BOOT_DEV_SPI 0x1a
>>
>> The kernel should know which SoC is in use and
>> act apropriately right?
>
> And this have lots of machine_is() calls everywhere?

No need for Mr. Everywhere to know about the SoC.

There are other ways to achieve this. arch/arm/mach-foo
always knows which ASIC it is running on, and it can do
various things:

- Add device tree fragments/overlays (OK high-tech, but
we're getting to this, inevitably)

- Selectively add AUXDATA, which is absolutely OK if
we can do autoprobing of hardware IMO.

Yours,
Linus Walleij