Hi Simon,
I like your updates but i have few comments: - I believe tpm_tis_i2c should be renamed as tpm_tis_infineon to be aligned with Linux naming. Also as there is no standard for i2c for tpm, every vendor does have their own low level transport protocol. I believe this is confusing.
- I think atmel tpm driver can be easily move to driver model with this new tpm class. I would cleanup some few #ifdef and make the code even clearer. May be i can try to send an update when sending ST33ZP24 TPM driver ?
Other than that, i looks pretty good.
Thanks a lot. Christophe
On 23/08/2015 02:31, Simon Glass wrote:
This series adds driver model support for Trusted Platform Modules (TPMs). These have a very simple interface and are configured via the device tree.
Two bus types are supported at present: I2C and LPC (Intel Low-Pin-Count).
Most drivers and users are converted over to driver model. The exception is the Atmel TPM and its users.
The I2C driver has been cleaned up and simplified. It was ported from Linux and was pretty hard to follow. This series includes patches to unify the code, remove duplicated data structures and drop unnecessary indirection.
Also this series enables the TPM on all Chromebooks supported by upstream U-Boot (snow, spring, nyan-big, pit, pi, link, panther) since some did not have it fully enabled.
As before, the 'tpm' command can be used to implement TPM functionality. In addition a 'tpmtest' command provides some basic TPM tests taken from Chrome OS U-Boot. These are fairly rudimentary but are useful if you know what you are doing.
Changes in v2:
- Add a 'TPM' menu in Kconfig
- Add new patch with a 'tpmtest' command
- Add new patch with functions to access flags and permissions
- Add tpm device tree node for panther also
- Correct error checking code in tpm_sendrecv_command()
- Correct error-checking code in report_return_code()
- Enable 'tpmtest' command for nyan
- Enhance uclass to support timeouts with new send()/recv() methods
- Implement the get_desc() method
- Include tpm.h header file instead of tis.h
- Move the timeout definitions into a new tpm_internal.h header
- Update cover letter to mention panther and the tpmtest command.
- Update driver for the new uclass interface
- Update driver for v2 TPM uclass which supports timeouts
- Use tpm_ prefix instead of tis_ for TPM functions
Simon Glass (28): tpm: Remove old pre-driver-model I2C code tpm: Drop two unused options tpm: Add Kconfig options for TPMs tpm: Convert board config TPM options to Kconfig tpm: Convert drivers to use SPDX tpm: Move the I2C TPM code into one file tpm: tpm_tis_i2c: Drop unnecessary methods tpm: tpm_tis_i2c: Drop struct tpm_vendor_specific tpm: tpm_tis_i2c: Merge struct tpm_dev into tpm_chip tpm: tpm_tis_i2c: Merge struct tpm into tpm_chip tpm: tpm_tis_i2c: Move definitions into the header file tpm: tpm_tis_i2c: Simplify init code tpm: tpm_tis_i2c: Use a consistent tpm_tis_i2c_ prefix tpm: tpm_tis_i2c: Tidy up delays dm: tpm: Add a uclass for Trusted Platform Modules dm: tpm: Convert the TPM command and library to driver model dm: i2c: Add a command to adjust the offset length tpm: Report tpm errors on the command line dm: tpm: sandbox: Convert TPM driver to driver model tpm: Check that parse_byte_string() has data to parse exynos: x86: dts: Add tpm nodes to the device tree for Chrome OS devices dm: tpm: Convert I2C driver to driver model dm: tpm: Convert LPC driver to driver model tpm: Add a 'tpm info' command tpm: Add functions to access flags and permissions dm: tpm: Add a 'tpmtest' command tpm: Enable 'tpmtest' command for Chrome OS boards with TPMs tegra: nyan: Enable TPM command and driver
README | 6 - arch/arm/dts/exynos5250-snow.dts | 9 + arch/arm/dts/exynos5250-spring.dts | 8 + arch/arm/dts/exynos5420-peach-pit.dts | 6 +- arch/arm/dts/exynos5800-peach-pi.dts | 6 +- arch/sandbox/dts/sandbox.dts | 4 + arch/x86/dts/chromebook_link.dts | 5 + arch/x86/dts/chromebox_panther.dts | 5 + common/Kconfig | 22 + common/Makefile | 1 + common/cmd_i2c.c | 33 + common/cmd_tpm.c | 100 ++- common/cmd_tpm_test.c | 565 +++++++++++++++++ configs/chromebook_link_defconfig | 5 + configs/chromebox_panther_defconfig | 5 + .../controlcenterd_36BIT_SDCARD_DEVELOP_defconfig | 4 + configs/controlcenterd_36BIT_SDCARD_defconfig | 4 + .../controlcenterd_TRAILBLAZER_DEVELOP_defconfig | 4 + configs/controlcenterd_TRAILBLAZER_defconfig | 4 + configs/coreboot-x86_defconfig | 5 + configs/nyan-big_defconfig | 5 + configs/peach-pi_defconfig | 5 + configs/peach-pit_defconfig | 5 + configs/sandbox_defconfig | 4 + configs/snow_defconfig | 5 + configs/spring_defconfig | 5 + drivers/tpm/Kconfig | 69 ++ drivers/tpm/Makefile | 4 +- drivers/tpm/tpm-uclass.c | 133 ++++ drivers/tpm/tpm.c | 694 --------------------- drivers/tpm/tpm_atmel_twi.c | 15 +- drivers/tpm/tpm_internal.h | 287 +++++++++ drivers/tpm/tpm_tis_i2c.c | 572 ++++++++--------- drivers/tpm/{tpm_private.h => tpm_tis_i2c.h} | 88 +-- drivers/tpm/tpm_tis_lpc.c | 290 ++++----- drivers/tpm/tpm_tis_sandbox.c | 57 +- include/configs/controlcenterd.h | 7 - include/configs/efi-x86.h | 2 - include/configs/exynos5-common.h | 7 - include/configs/x86-common.h | 2 - include/dm/uclass-id.h | 1 + include/fdtdec.h | 2 - include/tis.h | 3 + include/tpm.h | 243 +++++++- lib/Kconfig | 10 + lib/fdtdec.c | 2 - lib/tpm.c | 82 ++- 47 files changed, 2102 insertions(+), 1298 deletions(-) create mode 100644 common/cmd_tpm_test.c create mode 100644 drivers/tpm/tpm-uclass.c delete mode 100644 drivers/tpm/tpm.c create mode 100644 drivers/tpm/tpm_internal.h rename drivers/tpm/{tpm_private.h => tpm_tis_i2c.h} (54%)