From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter De Schrijver Subject: [PATCH v8 0/6] efuse driver for Tegra Date: Thu, 12 Jun 2014 18:36:34 +0300 Message-ID: <1402587400-1544-1-git-send-email-pdeschrijver@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Peter De Schrijver Cc: Mark Rutland , Wolfram Sang , Linus Walleij , Stefan Agner , Paul Gortmaker , Thierry Reding , Joseph Lo , Russell King , Pawel Moll , Stephen Warren , Grant Likely , Tomasz Figa , Sebastian Hesselbarth , devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, Arnd Bergmann , Ian Campbell , Tejun Heo , Rob Herring , Alexandre Courbot , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, Herbert Xu List-Id: linux-tegra@vger.kernel.org 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 Changes since v7: * Initialize speedo info and randomness in early boot * Expose speedo, sku and revision related info in tegra_sku_info * Move APB DMA into Tegra20 fuse driver and remove apbio * Make code more complex to support systems without conforming DT Peter De Schrijver (6): 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 misc: fuse: move APB DMA into Tegra20 fuse driver 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 | 5 - arch/arm/mach-tegra/apbio.c | 206 -------------- arch/arm/mach-tegra/apbio.h | 22 -- 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 | 7 +- 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 | 8 + drivers/misc/fuse/tegra/fuse-tegra.c | 154 ++++++++++ drivers/misc/fuse/tegra/fuse-tegra20.c | 214 ++++++++++++++ drivers/misc/fuse/tegra/fuse-tegra30.c | 223 +++++++++++++++ drivers/misc/fuse/tegra/fuse.h | 71 +++++ drivers/misc/fuse/tegra/speedo-tegra114.c | 109 ++++++++ drivers/misc/fuse/tegra/speedo-tegra124.c | 167 +++++++++++ drivers/misc/fuse/tegra/speedo-tegra20.c | 109 ++++++++ drivers/misc/fuse/tegra/speedo-tegra30.c | 287 +++++++++++++++++++ drivers/misc/fuse/tegra/tegra-apbmisc.c | 110 ++++++++ include/linux/tegra-soc.h | 42 +++ 39 files changed, 1633 insertions(+), 1083 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/apbio.c delete mode 100644 arch/arm/mach-tegra/apbio.h 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 create mode 100644 drivers/misc/fuse/tegra/tegra-apbmisc.c -- 1.7.7.rc0.72.g4b5ea.dirty From mboxrd@z Thu Jan 1 00:00:00 1970 From: pdeschrijver@nvidia.com (Peter De Schrijver) Date: Thu, 12 Jun 2014 18:36:34 +0300 Subject: [PATCH v8 0/6] efuse driver for Tegra Message-ID: <1402587400-1544-1-git-send-email-pdeschrijver@nvidia.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Changes since v7: * Initialize speedo info and randomness in early boot * Expose speedo, sku and revision related info in tegra_sku_info * Move APB DMA into Tegra20 fuse driver and remove apbio * Make code more complex to support systems without conforming DT Peter De Schrijver (6): 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 misc: fuse: move APB DMA into Tegra20 fuse driver 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 | 5 - arch/arm/mach-tegra/apbio.c | 206 -------------- arch/arm/mach-tegra/apbio.h | 22 -- 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 | 7 +- 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 | 8 + drivers/misc/fuse/tegra/fuse-tegra.c | 154 ++++++++++ drivers/misc/fuse/tegra/fuse-tegra20.c | 214 ++++++++++++++ drivers/misc/fuse/tegra/fuse-tegra30.c | 223 +++++++++++++++ drivers/misc/fuse/tegra/fuse.h | 71 +++++ drivers/misc/fuse/tegra/speedo-tegra114.c | 109 ++++++++ drivers/misc/fuse/tegra/speedo-tegra124.c | 167 +++++++++++ drivers/misc/fuse/tegra/speedo-tegra20.c | 109 ++++++++ drivers/misc/fuse/tegra/speedo-tegra30.c | 287 +++++++++++++++++++ drivers/misc/fuse/tegra/tegra-apbmisc.c | 110 ++++++++ include/linux/tegra-soc.h | 42 +++ 39 files changed, 1633 insertions(+), 1083 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/apbio.c delete mode 100644 arch/arm/mach-tegra/apbio.h 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 create mode 100644 drivers/misc/fuse/tegra/tegra-apbmisc.c -- 1.7.7.rc0.72.g4b5ea.dirty