Commit 41a5e1cf authored May 19, 2016 by Christophe Ricard Committed by Jarkko Sakkinen Jun 25, 2016

tpm/tpm_tis: Split tpm_tis driver into a core and TCG TIS compliant phy



To avoid code duplication between the old tpm_tis and the new and future
native tcg tis driver(ie: spi, i2c...), the tpm_tis driver was reworked,
so that all common logic is extracted and can be reused from all drivers.

The core methods can also be used from other TIS like drivers.

itpm workaround is now managed with a specific tis flag
TPM_TIS_ITPM_POSSIBLE.

This commit is based on the initial work by Peter Huewe.

Signed-off-by: Peter Huewe <peter.huewe@infineon.com>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

parent 92eb0f73

drivers/char/tpm/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -24,9 +24,16 @@ menuconfig TCG_TPM

		if TCG_TPM

		config TCG_TIS_CORE
		tristate
		---help---
		TCG TIS TPM core driver. It implements the TPM TCG TIS logic and hooks
		into the TPM kernel APIs. Physical layers will register against it.

		config TCG_TIS
		tristate "TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface"
		depends on X86
		select TCG_TIS_CORE
		---help---
		If you have a TPM security chip that is compliant with the
		TCG TIS 1.2 TPM specification (TPM1.2) or the TCG PTP FIFO

drivers/char/tpm/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@ ifdef CONFIG_TCG_IBMVTPM
		tpm-y += tpm_eventlog.o tpm_of.o
		endif
		endif
		obj-$(CONFIG_TCG_TIS_CORE) += tpm_tis_core.o
		obj-$(CONFIG_TCG_TIS) += tpm_tis.o
		obj-$(CONFIG_TCG_TIS_I2C_ATMEL) += tpm_i2c_atmel.o
		obj-$(CONFIG_TCG_TIS_I2C_INFINEON) += tpm_i2c_infineon.o