This patch series adds support for the the H1 secure microcontroller running cr50 firmware found on various recent Chromebooks. This driver is necessary to boot into a ChromeOS userspace environment. It implements support for several functions, including TPM-like functionality, and supports SPI and I2C interfaces. The last time this was series sent looks to be [1]. I've looked over the patches and review comments and tried to address any feedback that Andrey didn't address (really minor things like newlines). The first three patches add a couple pre-requisite core changes so that the drivers can be merged. The last three patches add the SPI and i2c drivers along with the DT binding. [1] https://lkml.kernel.org/r/1469757314-116169-1-git-send-email-apronin@xxxxxxxxxxxx Changes from v1: * Dropped symlink and sysfs patches * Removed 'is_suspended' bits * Added new patch to freeze khwrng thread * Moved binding to google,cr50.txt and added Reviewed-by tag from Rob Andrey Pronin (4): tpm_tis_core: add optional max xfer size check tpm_tis_spi: add max xfer size dt-bindings: tpm: document properties for cr50 tpm: add driver for cr50 on SPI Duncan Laurie (1): tpm: Add driver for cr50 on I2C Stephen Boyd (1): hwrng: core: Freeze khwrng thread during suspend .../bindings/security/tpm/google,cr50.txt | 19 + drivers/char/hw_random/core.c | 5 +- drivers/char/tpm/Kconfig | 26 + drivers/char/tpm/Makefile | 3 + drivers/char/tpm/cr50.c | 33 + drivers/char/tpm/cr50.h | 15 + drivers/char/tpm/cr50_i2c.c | 705 ++++++++++++++++++ drivers/char/tpm/cr50_spi.c | 450 +++++++++++ drivers/char/tpm/tpm_tis_core.c | 9 +- drivers/char/tpm/tpm_tis_core.h | 1 + drivers/char/tpm/tpm_tis_spi.c | 1 + 11 files changed, 1265 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/security/tpm/google,cr50.txt create mode 100644 drivers/char/tpm/cr50.c create mode 100644 drivers/char/tpm/cr50.h create mode 100644 drivers/char/tpm/cr50_i2c.c create mode 100644 drivers/char/tpm/cr50_spi.c base-commit: 0ecfebd2b52404ae0c54a878c872bb93363ada36 -- Sent by a computer through tubes
