linux-kernel - [PATCH v8 0/3] J7200: Add support for GPIO and higher speed modes in MMCSD subsystems

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Date:   Wed, 24 Mar 2021 12:07:56 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Aswath Govindraju <a-govindraju@...com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 0/3] J7200: Add support for GPIO and higher speed modes in MMCSD subsystems

The following series of patches
- Add support for GPIO subsystem in main and wakeup domains.
- Add voltage regulator device tree nodes and their corresponding pinmux
  to support power cycle and voltage switch required for UHS-I modes
- sets respective tags in sdhci0 node to support higher speeds
- remove no-1-8-v tag from sdhci1 node to support UHS-I modes
- Update delay values for various speed modes supported.


test logs
- eMMC HS400 speed mode
  https://pastebin.ubuntu.com/p/pRzV2ZvSJZ/

- SD SDR104 speed mode
  https://pastebin.ubuntu.com/p/n64PNdDy2v/  
  
- GPIO logs
  https://pastebin.ubuntu.com/p/HDBBMwMcdj/

Changes since v7:
- Added the voltage regulator nodes to indicate the complete
  power flow for MMCSD1 subsystem
- Corrected minor errors in DT nodes
- Reran the tests.
- Rebased the series

Changes since v6:
- Corrected the node name from vdd_sd_dv_pins_default to
  vdd-sd-dv-pins-default

Changes since v5:
- Corrected the link in patch 3 as it broken.
- Added the version number for the references used in patch 3.
- picked up reviewed-by from grygorii for patches 1 and 2.

Changes since v4:
- Added main_i2c0 pinmux required for doing power cycles to MMCSD1
  subsystem
- Updated delay values for various speed modes supported
- Corrected the ti,ngpio property to indicate highest gpio lines that
  can be accessed.
- Reran the performace tests

Changes since v3:
- Removed patch (1 in v3).
- Rebased and included patches that add support for GPIO from series [1].
- Re-ran the performace tests for SD and eMMC.

Changes since v2:
- Added main_gpio0 DT node
- Added voltage regulator device tree nodes required to support UHS-I modes

Changes since v1:
- squashed the two patches into one
- added performance logs for the above mentioned speed modes


Aswath Govindraju (1):
  arm64: dts: ti: k3-j7200: Add support for higher speed modes and
    update delay select values for MMCSD subsystems

Faiz Abbas (2):
  arm64: dts: ti: k3-j7200: Add gpio nodes
  arm64: dts: ti: k3-j7200-common-proc-board: Disable unused gpio
    modules

 .../dts/ti/k3-j7200-common-proc-board.dts     | 94 +++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-j7200-main.dtsi     | 86 ++++++++++++++++-
 .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi      | 34 +++++++
 3 files changed, 212 insertions(+), 2 deletions(-)

-- 
2.17.1