[PATCH] RFC: add function for localbus address
broonie at kernel.org
Mon Sep 8 14:21:43 PDT 2014
On Mon, Sep 08, 2014 at 01:22:44PM -0700, Stephen Boyd wrote:
> Where is this described? From the commit text that introduces
> IORESOURCE_REG I see:
> "Currently a bunch of I2C/SPI MFD drivers are using IORESOURCE_IO for
> register address ranges. Since this causes some confusion due to the
> primary use of this resource type for PCI/ISA I/O ports create a new
> resource type IORESOURCE_REG."
> And the comment next to the #define says "Register offsets". I don't see
> anywhere where it mentions these are CPU addresses. Certainly the
> current IORESOURCE_REG users aren't CPU addresses because they're
> SPI/I2C device drivers.
Right, the intention was specifically to handle things where
IORESOURCE_MEM wasn't appropriate as it wasn't ever going to be memory
mapped I/O and should be in a separate address space.
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