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[V5,0/7] Add interconnect support to QSPI and QUP drivers

Message ID 1588919619-21355-1-git-send-email-akashast@codeaurora.org
Headers show
Series Add interconnect support to QSPI and QUP drivers | expand

Message

Akash Asthana May 8, 2020, 6:33 a.m. UTC 
V5 depend on below patches. 
 - https://lore.kernel.org/patchwork/patch/1237642/ [Add helpers
   for enabling/disabling a path]
 - https://patchwork.kernel.org/patch/11491027/ [Add devm_of_icc_get()
   as exported API for users ]

dt-binding patch for QUP drivers.
 - https://patchwork.kernel.org/patch/11534149/ [Convert QUP bindings
        to YAML and add ICC, pin swap doc]

High level design:
 - QUP wrapper/common driver.
   Vote for QUP core on behalf of earlycon from probe.
   Remove BW vote during earlycon exit call

 - SERIAL driver.
   Vote only for CPU/CORE path because driver is in FIFO mode only
   Vote/unvote from qcom_geni_serial_pm func.
   Bump up the CPU vote from set_termios call based on real time need

 - I2C driver.
   Vote for CORE/CPU/DDR path
   Vote/unvote from runtime resume/suspend callback
   As bus speed for I2C is fixed from probe itself no need for bump up.

 - SPI QUP driver.
   Vote only for CPU/CORE path because driver is in FIFO mode only
   Vote/unvote from runtime resume/suspend callback
   Bump up CPU vote based on real time need per transfer.

 - QSPI driver.
   Vote only for CPU path
   Vote/unvote from runtime resume/suspend callback
   Bump up CPU vote based on real time need per transfer.

Changes in V2:
 - Add devm_of_icc_get() API interconnect core.
 - Add ICC support to common driver to fix earlyconsole crash.

Changes in V3:
 - Define common ICC APIs in geni-se driver and use it across geni based
   I2C,SPI and UART driver.

Changes in V4:
 - Add a patch to ICC core to scale peak requirement
   as twice of average if it is not mentioned explicilty.

Changes in V5:
 - As per Georgi's suggestion removed patch from ICC core for assuming
   peak_bw as twice of average when it's not mentioned, instead assume it
   equall to avg_bw and keep this assumption in ICC client itself.
 - As per Matthias suggestion use enum for GENI QUP ICC paths.

Akash Asthana (7):
  soc: qcom: geni: Support for ICC voting
  soc: qcom-geni-se: Add interconnect support to fix earlycon crash
  i2c: i2c-qcom-geni: Add interconnect support
  spi: spi-geni-qcom: Add interconnect support
  tty: serial: qcom_geni_serial: Add interconnect support
  spi: spi-qcom-qspi: Add interconnect support
  arm64: dts: sc7180: Add interconnect for QUP and QSPI

 arch/arm64/boot/dts/qcom/sc7180.dtsi  | 127 ++++++++++++++++++++++++++++
 drivers/i2c/busses/i2c-qcom-geni.c    |  29 ++++++-
 drivers/soc/qcom/qcom-geni-se.c       | 155 ++++++++++++++++++++++++++++++++++
 drivers/spi/spi-geni-qcom.c           |  32 ++++++-
 drivers/spi/spi-qcom-qspi.c           |  59 ++++++++++++-
 drivers/tty/serial/qcom_geni_serial.c |  38 ++++++++-
 include/linux/qcom-geni-se.h          |  44 ++++++++++
 7 files changed, 478 insertions(+), 6 deletions(-)