linux-kernel - [PATCH V8 0/8] Add interconnect support to QSPI and QUP drivers

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Message-Id: <1592908737-7068-1-git-send-email-akashast@codeaurora.org>
Date:   Tue, 23 Jun 2020 16:08:49 +0530
From:   Akash Asthana <akashast@...eaurora.org>
To:     gregkh@...uxfoundation.org, agross@...nel.org,
        bjorn.andersson@...aro.org, wsa@...-dreams.de, broonie@...nel.org
Cc:     linux-i2c@...r.kernel.org, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, swboyd@...omium.org,
        mgautam@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-serial@...r.kernel.org, mka@...omium.org,
        dianders@...omium.org, evgreen@...eaurora.org,
        linux-kernel@...r.kernel.org,
        Akash Asthana <akashast@...eaurora.org>
Subject: [PATCH V8 0/8] Add interconnect support to QSPI and QUP drivers

This patch series is based on tag "next-20200622" of linux-next tree.

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.

Changes in V6:
 - No Major change

Changes in V7:
 - As per Matthias's comment removed usage of peak_bw variable because we don't
   have explicit peak requirement, we were voting peak = avg and this can be
   tracked using single variable for avg bw.
 - As per Matthias's comment improved print log.

Changes in V8:
 - Add [PATCH V8 5/8] to factor out common code for clock setting.
 - Combine ICC voting and clock setting to single API. [PATCH V8 6/8]
 - Add ICC voting per transfer because in case of multi message,
   transfer frequency can vary for each message/transfer.[PATCH V8 6/8]

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
  tty: serial: qcom_geni_serial: Add interconnect support
  spi: spi-geni-qcom: Add interconnect support
  spi: spi-qcom-qspi: Add interconnect support
  arm64: dts: sc7180: Add interconnect for QUP and QSPI

Douglas Anderson (1):
  spi: spi-geni-qcom: Combine the clock setting code

 arch/arm64/boot/dts/qcom/sc7180.dtsi  | 127 ++++++++++++++++++++++++++++
 drivers/i2c/busses/i2c-qcom-geni.c    |  26 +++++-
 drivers/soc/qcom/qcom-geni-se.c       | 150 ++++++++++++++++++++++++++++++++++
 drivers/spi/spi-geni-qcom.c           | 100 +++++++++++++++--------
 drivers/spi/spi-qcom-qspi.c           |  56 ++++++++++++-
 drivers/tty/serial/qcom_geni_serial.c |  38 ++++++++-
 include/linux/qcom-geni-se.h          |  40 +++++++++
 7 files changed, 496 insertions(+), 41 deletions(-)

-- 
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