tpm: introduce tpm_chip_start() and tpm_chip_stop()
Encapsulate power gating and locality functionality to tpm_chip_start() and tpm_chip_stop() in order to clean up the branching mess in tpm_transmit(). Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: NStefan Berger <stefanb@linux.ibm.com> Tested-by: NStefan Berger <stefanb@linux.ibm.com> Reviewed-by: NJerry Snitselaar <jsnitsel@redhat.com> Reviewed-by: NJames Bottomley <James.Bottomley@HansenPartnership.com> Tested-by: NAlexander Steffen <Alexander.Steffen@infineon.com>
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