From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwSeM-0005j2-6M for barebox@lists.infradead.org; Tue, 28 Jan 2020 15:19:35 +0000 Received: by mail-wr1-x441.google.com with SMTP id z7so16422800wrl.13 for ; Tue, 28 Jan 2020 07:19:32 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Cameron Ferguson Date: Tue, 28 Jan 2020 15:19:19 +0000 Message-ID: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: Small tweak to get ACPI watchdog working (iTCO) To: barebox@lists.infradead.org, a.fatoum@pengutronix.de, wim@iguana.be In my previous email, I only had the "write" operations associated with controlling the watchdog timer. I have edited my code to include the "read" operations too, but still it's not working. Here's my new code: /* R */ retval = ioread32(base + 4u); // This should be 0x0 /* R */ retval = ioread32(base + 4u); // This should be 0x0 /* W */ iowrite32(0x20000, base + 4u); /* R */ retval = ioread32(base + 8u); // This should be 0x1800 /* R */ retval = ioread32(base + 8u); // This should be 0x1800 /* W */ iowrite32(0x1000, base + 8u); /* R */ retval = ioread32(base + 0u); // This should be 0x4 /* W */ iowrite32(0x4, base + 0u); /* R */ retval = ioread32(base + 10u); // This should be 0x40000 /* W */ iowrite32(0x640000, base + 10u); /* R */ retval = ioread32(base + 0u); // This should be 0x2 /* W */ iowrite32(0x4, base + 0u); // This is a kick /* R */ retval = ioread32(base + 0u); // This should be 0x34 /* W */ iowrite32(0x4, base + 0u); // This is a kick The first two read operations should both return 0x0, however I'm getting what looks like a random number. Also it consitently reads the value 0x4 from "base + 0u". Anyone got an idea? _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox