tenderloin: Get mainline kernel working

[Herrie82]

Seeing 3.4 kernels are really EOL now by the looks of it, we need to get our 3.4 targets (mako, hammerhead, tenderloin) working with mainline kernel.

There were various attempts done in the past:
https://github.com/mboudr35/hp-touchpad-linux
https://github.com/lopsided98/linux/tree/hp-tenderloin
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git/log/?h=apq8060-dragonboard-graphics
https://github.com/shr-distribution/linux/tree/tenderloin/5.19/mainline

Steps:

1. Submit missing bits to upstream kernel for consideration:

• mmcc bindings: https://patchwork.kernel.org/project/linux-arm-msm/patch/[email protected]/

• dt-bindings: phy: qcom,usb-hs-phy: Add compatible: https://patchwork.kernel.org/project/linux-arm-msm/patch/[email protected]/

• dt-bindings: mfd: qcom: pm8xxx: Add pm8901 compatible: https://patchwork.kernel.org/project/linux-arm-msm/patch/[email protected]/

• mfd: pm8xxx: add support for PM8901: https://patchwork.kernel.org/project/linux-arm-msm/patch/[email protected]/

• dt-bindings: pinctrl: qcom,pmic-mpp: add support for PM8901: https://patchwork.kernel.org/project/linux-arm-msm/patch/[email protected]/

• pinctrl: qcom-ssbi: add support for PM8901: https://patchwork.kernel.org/project/linux-arm-msm/patch/[email protected]/

-max8903b charger:
lopsided98/linux@48bbbe4

• Work out mmcc clocks:
  https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git/commit/?h=apq8060-dragonboard-graphics&id=ac84ded5906d9e932789122a5dcbdaab0cc95ee6 (non-working?) and mboudr35/hp-touchpad-linux@bc75442 (partially working? )

• Implement hacks properly:
  https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git/commit/?h=apq8060-dragonboard-graphics&id=811e01bbf43c62b7ffabc01fc1d3e6880057a5b4 and mboudr35/hp-touchpad-linux@ff35130

• Rework LEDS LPG to general framework:
  mboudr35/hp-touchpad-linux@5d442f5 and mboudr35/hp-touchpad-linux@1f911a1

2. Update the device tree, validate and submit upstream.
   Examples:
   https://github.com/mboudr35/hp-touchpad-linux/blob/tenderloin-5.15/arch/arm/boot/dts/qcom-apq8060-tenderloin.dts
   https://github.com/lopsided98/linux/blob/hp-tenderloin/arch/arm/boot/dts/qcom-apq8060-tenderloin.dts

[Herrie82]

Various schematics (mainly Opal and Topaz 3G, so no Topaz WiFi only)
Schematics-Opal.6050A2430401.rX01.pdf
Schematics-Opal_6050A2430401-mb_dvt_0704.pdf
Schematics-Topaz3G-6050A2428701-MB-X01.20101012.pdf
Tech-Specs-hptouchpad-120110090301-phpapp02 (1).pdf
Cypress Portfolio.pdf