linux-kernel - [PATCH v2 0/4] hook up pin controller clocks on Google Tensor gs101

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Date: Tue, 30 Apr 2024 10:49:45 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Peter Griffin <peter.griffin@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, 
 Sam Protsenko <semen.protsenko@...aro.org>, kernel-team@...roid.com, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH v2 0/4] hook up pin controller clocks on Google Tensor
 gs101

This series hooks up the individual clocks for each pin controller in the
gs101 DTS.

On Google Tensor gs101 there are separate bus clocks / gates each for each
pinctrl instance. To be able to access each pinctrl instance's registers,
this bus clock needs to be running, otherwise register access will hang.

The driver update to support this extra clock has been proposed in
https://lore.kernel.org/r/20240426-samsung-pinctrl-busclock-v3-0-adb8664b8a7e@linaro.org

This series depends on:
* hsi2 series:
  https://lore.kernel.org/r/20240429-hsi0-gs101-v3-0-f233be0a2455@linaro.org
* pin controller clock support:
  https://lore.kernel.org/r/20240426-samsung-pinctrl-busclock-v3-0-adb8664b8a7e@linaro.org

Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
Changes in v2:
- use <0> instead of a placeholder clock (Krzysztof)
- Link to v1: https://lore.kernel.org/r/20240429-samsung-pinctrl-busclock-dts-v1-0-5e935179f3ca@linaro.org

---
André Draszik (4):
      arm64: dts: exynos: gs101: specify bus clock for pinctrl (far) alive
      arm64: dts: exynos: gs101: specify bus clock for pinctrl_peric[01]
      arm64: dts: exynos: gs101: specify bus clock for pinctrl_hsi2
      arm64: dts: exynos: gs101: specify empty clocks for remaining pinctrl

 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
---
base-commit: d04466706db5e241ee026f17b5f920e50dee26b5
change-id: 20240429-samsung-pinctrl-busclock-dts-46b223471541

Best regards,
-- 
André Draszik <andre.draszik@...aro.org>