Re: [PATCH v4 1/7] tpm: tpm_tis: Make implementation of read16 read32 write32 optional

On Tue, Mar 31, 2020 at 02:32:01PM +0300, amirmizi6@gmail.com wrote:

From: Amir Mizinski <redacted>

Only tpm_tis can use memory mapped I/O, which is truly mapped into
the kernel's memory space. So using ioread16/ioread32/iowrite32 turn into a
straightforward pointer dereference.
Every other driver require more complicated operations to read more than 1
byte at a time and will just fall back to read_bytes/write_bytes.
Therefore, move this common code out of tpm_tis_spi into tpm_tis_core, so
that it is automatically used when low-level drivers do not implement the
specialized methods.

Co-developed-by: Alexander Steffen <redacted>
Signed-off-by: Alexander Steffen <redacted>
Signed-off-by: Amir Mizinski <redacted>

Reviewed-by: Jarkko Sakkinen <redacted>

/Jarkko