From a2871c62e1865c45f87a9343de76f727fb7a0ffd Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Sun, 6 Oct 2013 12:43:36 -0600 Subject: tpm: Add support for Atmel I2C TPMs This is based on the work of Teddy Reed published on GitHub: https://github.com/theopolis/tpm-i2c-atmel.git 34894b988b67e0ae55088d6388e77b0dbf10c07d That driver was never merged, I have taken it as a starting port, forward ported, tested and revised the driver: - Make it broadly textually similar to the Infineon and Nuvoton I2C driver - Place everything in a format suitable for mainline inclusion - Use high level I2C functions i2c_master_send and i2c_master_recv for data xfer - Use the timeout system from the core code, by faking out a status register - Only I2C transfer the number of bytes in the reply, not a fixed message size. - checkpatch cleanups - Testing on ARM Kirkwood, with this device tree, using a AT97SC3204T-X1A180 tpm@29 { compatible = "atmel,at97sc3204t"; reg = <0x29>; }; Signed-off-by: Teddy Reed [jgg: revised and tested] Signed-off-by: Jason Gunthorpe [phuewe: minor whitespace changes] Signed-off-by: Peter Huewe --- drivers/char/tpm/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/char/tpm/Kconfig') diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig index ade71c134a1..f9085860b71 100644 --- a/drivers/char/tpm/Kconfig +++ b/drivers/char/tpm/Kconfig @@ -33,6 +33,15 @@ config TCG_TIS from within Linux. To compile this driver as a module, choose M here; the module will be called tpm_tis. +config TCG_TIS_I2C_ATMEL + tristate "TPM Interface Specification 1.2 Interface (I2C - Atmel)" + depends on I2C + ---help--- + If you have an Atmel I2C TPM security chip say Yes and it will be + accessible from within Linux. + To compile this driver as a module, choose M here; the module will + be called tpm_tis_i2c_atmel. + config TCG_TIS_I2C_INFINEON tristate "TPM Interface Specification 1.2 Interface (I2C - Infineon)" depends on I2C -- cgit v1.2.3-70-g09d2