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 onm Tegra20 A03 with a missing fuse DT node * Incorporate review comments 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 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
