From: Amir Mizinski <amirmizi6@xxxxxxxxx> This patch set adds support for TPM devices that implement the I2C. Interface defined by TCG PTP specification: https://trustedcomputinggroup.org/wp-content/uploads/TCG_PC_Client_Platform_TPM_Profile_PTP_2.0_r1.03_v22.pdf The driver was tested on Raspberry-Pie 3, using Nuvoton NPCT75X TPM. Interrupts are not implemented yet, preparing it for the next patch. This patch is based on initial work by oshri Alkoby, Alexander Steffen and Christophe Ricard Addressed comments from: - Jarkko Sakkinen: https://patchwork.kernel.org/patch/11236257/ - Rob Herring: https://patchwork.kernel.org/patch/11236253/ Changes since version 1: -"char:tpm:Add check_data handle to tpm_tis_phy_ops in order to check data integrity" - Fixed and extended commit description. - Fixed an issue regarding handling max retries. -"dt-bindings: tpm: Add YAML schema for TPM TIS I2C options": -Converted "tpm_tis_i2c.txt" to "tpm-tis-i2c.yaml". - Renamed "tpm_tis-i2c" to "tpm-tis-i2c". - Removed interrupts properties. -"char: tpm: add tpm_tis_i2c driver" - Replaced "tpm_tis-i2c" with "tpm-tis-i2c" in "tpm_tis_i2c.c". Changes since version 2: - Added 2 new commits with improvements suggested by Benoit Houyere. -"Fix expected bit handling and send all bytes in one shot without last byte in exception" -"Handle an exeption for TPM Firmware Update mode." - Updated patch to latest v5.5 -"dt-bindings: tpm: Add YAML schema for TPM TIS I2C options" - Added "interrupts" and "crc-checksum" to properties. - Updated binding description and commit info. -"char: tpm: add tpm_tis_i2c driver" (suggested by Benoit Houyere) - Added repeat I2C frame after NACK. - Checksum I2C feature activation in DTS file configuration. Amir Mizinski (7): char: tpm: Make implementation of read16 read32 write32 optional char: tpm: Add check_data handle to tpm_tis_phy_ops in order to check data integrity char: tpm: rewrite "tpm_tis_req_canceled()" char: tpm: Fix expected bit handling and send all bytes in one shot without last byte in exception tpm: Handle an exception for TPM Firmware Update mode. dt-bindings: tpm: Add YAML schema for TPM TIS I2C options char: tpm: add tpm_tis_i2c driver .../bindings/security/tpm/tpm-tis-i2c.yaml | 43 +++ drivers/char/tpm/Kconfig | 12 + drivers/char/tpm/Makefile | 1 + drivers/char/tpm/tpm2-cmd.c | 4 + drivers/char/tpm/tpm_tis_core.c | 182 ++++++------- drivers/char/tpm/tpm_tis_core.h | 41 ++- drivers/char/tpm/tpm_tis_i2c.c | 292 +++++++++++++++++++++ drivers/char/tpm/tpm_tis_spi.c | 41 --- include/linux/tpm.h | 1 + 9 files changed, 482 insertions(+), 135 deletions(-) create mode 100644 Documentation/devicetree/bindings/security/tpm/tpm-tis-i2c.yaml create mode 100644 drivers/char/tpm/tpm_tis_i2c.c -- 2.7.4
