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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190723191326.3afdff83@why> Content-Language: en-US X-Provags-ID: V03:K1:dvJjV3zHZn+oqCIPkmHwiDSu6I4OA4zKHZSdzsFj3LWRemg8fL9 MCLUEkOAH3IDkandjQIc7mxs/pVA2D4gW2/aaH0MSjwYauJLDHuvrYPdz0f2cTknSqc9jNc 6K12zyGJrmD0yr+Lk9fWgvYgYF46edIreLir7MiCBuDl8eADY0MOh1wTQ6+uB5D4cSBL7xV QVLU6sOXpDJ0sOVkD1Gpw== X-UI-Out-Filterresults: notjunk:1;V03:K0:6Fq+gLHahKA=:RrsTieCxIc0I9BhYSFgsjK EEVxIiRCaDdAdL3E9VeU0QzmTUDNGWrTt/2Ehd5nTNTLi0vlqBeDY2V5qXpWt4O5B9TtXIDO2 wI5s42ys66/TYBMMytUSs/ZBudgn697viNHSVghbzTjLRr9BfyHRnCUry/pMARqrgHdg6Q7/n ABH+NlZrgqLf1NyoH9EGPhuk/7U89OkVDvtAI2ngXvZfLbftR8HrU7bYt8+Tb/Dr2MAN4deuW lUtYoXLM5MmPfW3EFWBW+UN8x7/ORjtve/06oxrZ/HjjDbR23fKyx5H4G7qfJsaG8vx8/p5z2 dvtME+n6mflgj0WDelizt27ONDUOUg/IaDC7oM8f0VIeasp6A2svfMdWLhPlt1DtzalVQo0pj bm7rIKrMDR/8bmPnjhtrdWaRvMg+nI4j4cSmDyNd+4PZfex9rGfImzxcIw17saKVb7QwW6Zie UrbQcIZ1+NcLFKtbhQQlq7PbL9/Nw1lTn8WDNIM+BQaLv+bN0TvSknfSJHlpnhK1hq3dvKEq9 gPFCOkB80K+7tHTap+mkn7EvPxFGq/p81zp3DbbPKRxYRQCw9EBJbZ6rQvzKViKVwaMG8coYm DvvgN7TRlIP0gFeLokh9oe4HQ4wzTh4PXpssIYNXiXja53XIL/zxYMQQIpy52glYfbrjPmPLN l7pqRgNAVUgNBREtked5kJXYitbb+FWZtmB1YX0m/FqLE+hSQOXhgdZN2vx+GfY0+Vs2d7oKi PM/eBUUKPRZ5DwXVRxSSqW65SCbg0JciEF0WHxf1DFXZLWN4cM7LY/zklcU= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190728_035923_690298_A558F2E5 X-CRM114-Status: GOOD ( 18.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Ulf Hansson , Florian Fainelli , Scott Branden , Stephen Boyd , Ray Jui , Linus Walleij , Adrian Hunter , Eric Anholt , Rob Herring , bcm-kernel-feedback-list@broadcom.com, Mark Brown , Nicolas Saenz Julienne , Michael Turquette , linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Marc, Am 23.07.19 um 20:13 schrieb Marc Zyngier: > On Wed, 17 Jul 2019 23:16:04 +0200 > Stefan Wahren wrote: > >> This adds minimal support for the new Raspberry Pi 4 without the >> fancy stuff like GENET, PCIe, XHCI, 40 bit DMA and V3D. The RPi 4 is available >> in 3 different variants (1, 2 and 4 GB RAM), so leave the memory size to zero >> and let the bootloader take care of it. >> >> Other differences to the Raspberry Pi 3: >> - additional GIC 400 Interrupt controller >> - new thermal IP and HWRNG >> - additional MMC interface (emmc2) >> - additional UART, I2C, SPI and PWM interfaces >> >> Signed-off-by: Stefan Wahren >> >> ... >> + }; >> + >> + timer { >> + compatible = "arm,armv7-timer"; >> + interrupts = > + IRQ_TYPE_LEVEL_LOW)>, >> + > + IRQ_TYPE_LEVEL_LOW)>, >> + > + IRQ_TYPE_LEVEL_LOW)>, >> + > + IRQ_TYPE_LEVEL_LOW)>; >> + arm,cpu-registers-not-fw-configured; > Really? :-( i asked about that [1] and they said that the arm stubs [2] only set the timer frequency and zeroing CNTVOFF_EL2. > >> + always-on; > I'm pretty sure that's not the case. This indicates that you can power > the CPU off, bring it back on, and yet have your timer alive and > kicking. The only case this actually exists is for VMs. I can see it > being cargo-culted from previous RPi revisions, but that doesn't make > it true. They said that they used this to suppress high interrupt load for the timers. Stefan [1] - https://github.com/raspberrypi/linux/issues/3101 [2] - https://github.com/raspberrypi/tools/blob/master/armstubs/armstub8.S > > Thanks, > > M. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel