[PATCH v7 0/5] efuse driver for Tegra

Peter De Schrijver
2014-06-05T13:09:24Z

This driver allows userspace to read the raw efuse data. Its userspace
interface is modelled after the sunxi_sid driver which provides similar
functionality for some Allwinner SoCs. It has been tested on
Tegra20 (ventana), Tegra30 (beaverboard), Tegra114 (dalmore) and
Tegra124 (jetson TK1).

Changes since v1:

* Add documentation for sysfs interface
* Cleanup messages

Changes since v2:

* Incorporate early fuse code
* Remove module support
* Make driver always build when Tegra platform is selected
* Add DT binding document
* Address comments on v2

Changes since v3:

* Document sysfs file format
* Added apbmisc DT node for access to the apbmisc registers
* Address comments on v3

Changes since v4:

* Provide fallback to hardcoded 0x70000800 in case the apbmisc DT node is
missing. This is exactly what the current code does and prevents a system
crash in that case due to an invalid memory access by tegra_read_chipid()
* Added tegra_fuse_readl() function for drivers to read calibration data

Changes since v5:

* Fix kernel panic when booting on Tegra20 A03 with a missing fuse DT node
* Incorporate review comments

Changes since v6:

* Add the fix when booting on Tegra20 A03 which was supposed to be in v6 but
missing

Peter De Schrijver (5):
ARM: tegra: export apb dma readl/writel
ARM: tegra: move fuse exports to tegra-soc.h
misc: fuse: Add efuse driver for Tegra
ARM: tegra: Add efuse and apbmisc bindings
ARM: tegra: build new fuse driver in drivers/misc

Documentation/ABI/testing/sysfs-driver-tegra-fuse | 11 +
.../bindings/fuse/nvidia,tegra20-fuse.txt | 40 +++
.../bindings/misc/nvidia,tegra20-apbmisc.txt | 13 +
arch/arm/boot/dts/tegra114.dtsi | 15 +
arch/arm/boot/dts/tegra124.dtsi | 15 +
arch/arm/boot/dts/tegra20.dtsi | 15 +
arch/arm/boot/dts/tegra30.dtsi | 15 +
arch/arm/mach-tegra/Makefile | 4 -
arch/arm/mach-tegra/apbio.c | 51 ++--
arch/arm/mach-tegra/cpuidle.c | 2 +-
arch/arm/mach-tegra/flowctrl.c | 2 +-
arch/arm/mach-tegra/fuse.c | 252 -----------------
arch/arm/mach-tegra/fuse.h | 79 ------
arch/arm/mach-tegra/hotplug.c | 2 +-
arch/arm/mach-tegra/platsmp.c | 2 +-
arch/arm/mach-tegra/pm.c | 2 +-
arch/arm/mach-tegra/pmc.c | 2 +-
arch/arm/mach-tegra/powergate.c | 2 +-
arch/arm/mach-tegra/reset-handler.S | 2 +-
arch/arm/mach-tegra/reset.c | 2 +-
arch/arm/mach-tegra/sleep-tegra30.S | 2 +-
arch/arm/mach-tegra/tegra.c | 2 +-
arch/arm/mach-tegra/tegra114_speedo.c | 104 -------
arch/arm/mach-tegra/tegra20_speedo.c | 109 --------
arch/arm/mach-tegra/tegra30_speedo.c | 292 -------------------
drivers/misc/Makefile | 1 +
drivers/misc/fuse/Makefile | 1 +
drivers/misc/fuse/tegra/Makefile | 7 +
drivers/misc/fuse/tegra/fuse-tegra.c | 250 +++++++++++++++++
drivers/misc/fuse/tegra/fuse-tegra20.c | 134 +++++++++
drivers/misc/fuse/tegra/fuse-tegra30.c | 177 ++++++++++++
drivers/misc/fuse/tegra/fuse.h | 82 ++++++
drivers/misc/fuse/tegra/speedo-tegra114.c | 110 ++++++++
drivers/misc/fuse/tegra/speedo-tegra124.c | 180 ++++++++++++
drivers/misc/fuse/tegra/speedo-tegra20.c | 110 ++++++++
drivers/misc/fuse/tegra/speedo-tegra30.c | 294 ++++++++++++++++++++
include/linux/tegra-soc.h | 42 +++
37 files changed, 1554 insertions(+), 871 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-tegra-fuse
create mode 100644 Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
create mode 100644 Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
delete mode 100644 arch/arm/mach-tegra/fuse.c
delete mode 100644 arch/arm/mach-tegra/fuse.h
delete mode 100644 arch/arm/mach-tegra/tegra114_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
create mode 100644 drivers/misc/fuse/Makefile
create mode 100644 drivers/misc/fuse/tegra/Makefile
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra30.c
create mode 100644 drivers/misc/fuse/tegra/fuse.h
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra114.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra124.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra30.c

--
1.7.7.rc0.72.g4b5ea.dirty

>From b8119bfe321e69981f376633e10d98f66e142aa6 Mon Sep 17 00:00:00 2001
From: Peter De Schrijver <pdeschrijver@nvidia.com>
Date: Thu, 5 Jun 2014 15:10:54 +0300
Subject: [PATCH 0/5] efuse driver for Tegra
X-NVConfidentiality: public

Peter De Schrijver (5):
ARM: tegra: export apb dma readl/writel
ARM: tegra: move fuse exports to tegra-soc.h
misc: fuse: Add efuse driver for Tegra
ARM: tegra: Add efuse and apbmisc bindings
ARM: tegra: build new fuse driver in drivers/misc

Documentation/ABI/testing/sysfs-driver-tegra-fuse | 11 +
.../bindings/fuse/nvidia,tegra20-fuse.txt | 40 +++
.../bindings/misc/nvidia,tegra20-apbmisc.txt | 13 +
arch/arm/boot/dts/tegra114.dtsi | 15 +
arch/arm/boot/dts/tegra124.dtsi | 15 +
arch/arm/boot/dts/tegra20.dtsi | 15 +
arch/arm/boot/dts/tegra30.dtsi | 15 +
arch/arm/mach-tegra/Makefile | 4 -
arch/arm/mach-tegra/apbio.c | 51 ++--
arch/arm/mach-tegra/cpuidle.c | 2 +-
arch/arm/mach-tegra/flowctrl.c | 2 +-
arch/arm/mach-tegra/fuse.c | 252 -----------------
arch/arm/mach-tegra/fuse.h | 79 ------
arch/arm/mach-tegra/hotplug.c | 2 +-
arch/arm/mach-tegra/platsmp.c | 2 +-
arch/arm/mach-tegra/pm.c | 2 +-
arch/arm/mach-tegra/pmc.c | 2 +-
arch/arm/mach-tegra/powergate.c | 2 +-
arch/arm/mach-tegra/reset-handler.S | 2 +-
arch/arm/mach-tegra/reset.c | 2 +-
arch/arm/mach-tegra/sleep-tegra30.S | 2 +-
arch/arm/mach-tegra/tegra.c | 2 +-
arch/arm/mach-tegra/tegra114_speedo.c | 104 -------
arch/arm/mach-tegra/tegra20_speedo.c | 109 --------
arch/arm/mach-tegra/tegra30_speedo.c | 292 -------------------
drivers/misc/Makefile | 1 +
drivers/misc/fuse/Makefile | 1 +
drivers/misc/fuse/tegra/Makefile | 7 +
drivers/misc/fuse/tegra/fuse-tegra.c | 250 +++++++++++++++++
drivers/misc/fuse/tegra/fuse-tegra20.c | 134 +++++++++
drivers/misc/fuse/tegra/fuse-tegra30.c | 177 ++++++++++++
drivers/misc/fuse/tegra/fuse.h | 82 ++++++
drivers/misc/fuse/tegra/speedo-tegra114.c | 110 ++++++++
drivers/misc/fuse/tegra/speedo-tegra124.c | 180 ++++++++++++
drivers/misc/fuse/tegra/speedo-tegra20.c | 110 ++++++++
drivers/misc/fuse/tegra/speedo-tegra30.c | 294 ++++++++++++++++++++
include/linux/tegra-soc.h | 42 +++
37 files changed, 1554 insertions(+), 871 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-tegra-fuse
create mode 100644 Documentation/devicetree/bindings/fuse/nvidia,tegra20-fuse.txt
create mode 100644 Documentation/devicetree/bindings/misc/nvidia,tegra20-apbmisc.txt
delete mode 100644 arch/arm/mach-tegra/fuse.c
delete mode 100644 arch/arm/mach-tegra/fuse.h
delete mode 100644 arch/arm/mach-tegra/tegra114_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
delete mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
create mode 100644 drivers/misc/fuse/Makefile
create mode 100644 drivers/misc/fuse/tegra/Makefile
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/fuse-tegra30.c
create mode 100644 drivers/misc/fuse/tegra/fuse.h
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra114.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra124.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra20.c
create mode 100644 drivers/misc/fuse/tegra/speedo-tegra30.c

--
1.7.7.rc0.72.g4b5ea.dirty