linux-kernel - [PATCH v4 00/12] Tegra114: implement EMC support

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Message-ID: <20251125120559.158860-1-clamor95@gmail.com>
Date: Tue, 25 Nov 2025 14:05:47 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thierry Reding <treding@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Mikko Perttunen <mperttunen@...dia.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Dmitry Osipenko <digetx@...il.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Svyatoslav Ryhel <clamor95@...il.com>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-clk@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: [PATCH v4 00/12] Tegra114: implement EMC support

Add support for External Memory Controller found in Tegra 4 SoC along
with adjustments required for it to work properly.

Tested on ASUS TF701T (T40X) and Nvidia Tegratab (T40S). Both work fine.

---
Changes in v2:
- fix programming completion detection (changed EMC reg to MC reg reading)
- Tegra114 incorporated into Tegra124 dt-bindings schema

Changes in v3:
- adjusted MC and EMC schema to move description and ref into common property
- added Tegra114 support into devfreq driver
- added MC/EMC to DC interconnections

Changes in v4:
- fix number of EMC clocks required by activity counter transaction
- set minItems/maxItems for MC and EMC registers
- removed CONFIG_TEGRA124_CLK_EMC ifdefs from clk-tegra114
- minimized changes to tegra114_clock_init
- switch to devm_tegra_core_dev_init_opp_table
- switch to readl_poll_timeout_atomic for polling
- adjust DLL_CHANGE logic
- drop touching EMC_CLKCHANGE_SR_ENABLE
- use for_each_child_of_node_scoped for timing iteration
- add emc-mc timing check
- added print for amount of timings and ramcode
- align commit and code style
---

Svyatoslav Ryhel (12):
  devfreq: tegra30-devfreq: add support for Tegra114
  ARM: tegra: Add ACTMON node to Tegra114 device tree
  dt-bindings: memory: Document Tegra114 Memory Controller
  memory: tegra: implement EMEM regs and ICC ops for Tegra114
  dt-bindings: memory: Add Tegra114 memory client IDs
  clk: tegra: set up proper EMC clock implementation for Tegra114
  dt-bindings: memory: Document Tegra114 External Memory Controller
  soc: tegra: common: add Tegra114 support to
    devm_tegra_core_dev_init_opp_table
  memory: tegra: Add Tegra114 EMC driver
  ARM: tegra: Add External Memory Controller node on Tegra114
  ARM: tegra: Add EMC OPP and ICC properties to Tegra114 EMC and ACTMON
    device-tree nodes
  ARM: tegra: add DC interconnections for Tegra114

 .../nvidia,tegra124-emc.yaml                  |  174 +-
 .../nvidia,tegra124-mc.yaml                   |   31 +-
 .../dts/nvidia/tegra114-peripherals-opp.dtsi  |  151 ++
 arch/arm/boot/dts/nvidia/tegra114.dtsi        |   55 +
 drivers/clk/tegra/clk-tegra114.c              |   39 +-
 drivers/devfreq/tegra30-devfreq.c             |   17 +-
 drivers/memory/tegra/Kconfig                  |   12 +
 drivers/memory/tegra/Makefile                 |    1 +
 drivers/memory/tegra/tegra114-emc.c           | 1463 +++++++++++++++++
 drivers/memory/tegra/tegra114.c               |  193 +++
 drivers/soc/tegra/common.c                    |    5 +-
 include/dt-bindings/memory/tegra114-mc.h      |   67 +
 12 files changed, 2016 insertions(+), 192 deletions(-)
 create mode 100644 arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
 create mode 100644 drivers/memory/tegra/tegra114-emc.c

-- 
2.51.0