[PATCH v6 0/2] Fix corner cases with disabling CLKRUN in tpm_tis

From: Azhar Shaikh
Date: Wed Dec 06 2017 - 20:38:28 EST


Changes from v1:
- Patch 1: "tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
- Add NULL checks before calling clk_toggle callback
- Use IS_ENABLED instead of ifdef in tpm_tis_clkrun_toggle()
- Do not call tpm_platform_begin_xfer() and tpm_platform_end_xfer()
from tpm_tis_clkrun_toggle(). Make them static again.

- Patch 2: "tpm_tis: Move ilb_base_addr to tpm_tis_tcg_phy"
- This is a new patch in this series as per suggestion from Jason.
- Is the current implementation ok or I should move the code in tpm_tis_pnp_remove()
and tpm_tis_plat_remove() inside tpm_tis_remove(). That way all the unmapping
can be done in one place, instead of 3 different places now. Also the unmapping
in tpm_tis_init() can be moved to tpm_tis_remove(), since in case of error
tpm_tis_core_init() calls tpm_tis_remove(). Kindly suggest.

Changes from v2:
- Patch 1: "tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
- No changes

- Patch 2: "tpm_tis: Move ilb_base_addr to tpm_tis_tcg_phy"
- Updated is_bsw() function to have the #ifdef CONFIG_X86 check within the function
itself. Also removed the #ifdef CONFIG_X86 from all other places around is_bsw()

Changes from v3:
- Patch 1: "tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
- Change function name from clk_toggle to clk_enable
- Update the commit message.

- Patch 2: "tpm_tis: Move ilb_base_addr to tpm_tis_tcg_phy"
- No changes

Changes from v4:
- The numbering of patches is now interchanged.

- Patch 1: "tpm_tis: Move ilb_base_addr to tpm_tis_data"
- Had to move ilb_base_addr to tpm_tis_data, from tpm_tis_tcg_phy.
Since the ioremapping of ilb_base_addr had to be done before any TPM access,
hence moved the variable to tpm_tis_data.
- Also move the ioremapping of ilb_base_addr from tpm_tis_init() to
tpm_tis_core_init() i.e. before any TPM access is done.
- Rename marco LPC_CNTRL_REG_OFFSET to LPC_CNTRL_OFFSET
- Update the commit message.

- Patch 2: "tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
- Remove the functions tpm_platform_begin_xfer() and tpm_platform_end_xfer()
- Move the code from these functions to tpm_tis_clkrun_enable().

Changes from v5:
- Patch 1: "tpm_tis: Move ilb_base_addr to tpm_tis_data"
- No changes

- Patch 2: "tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
- Update the commit message.

Azhar Shaikh (2):
tpm_tis: Move ilb_base_addr to tpm_tis_data
tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()

drivers/char/tpm/tpm-interface.c | 6 ++
drivers/char/tpm/tpm_tis.c | 121 ++++++---------------------------------
drivers/char/tpm/tpm_tis_core.c | 111 +++++++++++++++++++++++++++++++++--
drivers/char/tpm/tpm_tis_core.h | 17 ++++++
include/linux/tpm.h | 1 +
5 files changed, 147 insertions(+), 109 deletions(-)

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1.9.1