From: Christian Eggers <ceggers@arri.de> To: Oleksij Rempel <linux@rempel-privat.de>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Fabio Estevam <festevam@gmail.com> Cc: Pengutronix Kernel Team <kernel@pengutronix.de>, NXP Linux Team <linux-imx@nxp.com>, <linux-i2c@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH 0/3] i2c: imx: Fix handling of arbitration loss Date: Thu, 17 Sep 2020 14:13:36 +0200 [thread overview] Message-ID: <20200917121338.10757-1-ceggers@arri.de> (raw) On my (noisy) system, I2C arbitration losses happen quite often. In it's current implementation, the IAL flags is partly handled, but has a number of shortcomings: 1. The driver runs unnecessarily in a timeout when waiting for an interrupt. 2. The driver performs 500 ms busy-waiting without any value. 3. Arbitration loss errors may be reported one transfer later than they occured. Best regards Christian
WARNING: multiple messages have this Message-ID (diff)
From: Christian Eggers <ceggers@arri.de> To: Oleksij Rempel <linux@rempel-privat.de>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Fabio Estevam <festevam@gmail.com> Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>, Pengutronix Kernel Team <kernel@pengutronix.de>, linux-i2c@vger.kernel.org Subject: [PATCH 0/3] i2c: imx: Fix handling of arbitration loss Date: Thu, 17 Sep 2020 14:13:36 +0200 [thread overview] Message-ID: <20200917121338.10757-1-ceggers@arri.de> (raw) On my (noisy) system, I2C arbitration losses happen quite often. In it's current implementation, the IAL flags is partly handled, but has a number of shortcomings: 1. The driver runs unnecessarily in a timeout when waiting for an interrupt. 2. The driver performs 500 ms busy-waiting without any value. 3. Arbitration loss errors may be reported one transfer later than they occured. Best regards Christian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-09-17 12:55 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-17 12:13 Christian Eggers [this message] 2020-09-17 12:13 ` [PATCH 0/3] i2c: imx: Fix handling of arbitration loss Christian Eggers 2020-09-17 12:20 Christian Eggers 2020-09-17 12:20 ` Christian Eggers 2020-09-25 7:03 ` Oleksij Rempel 2020-09-25 7:03 ` Oleksij Rempel
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20200917121338.10757-1-ceggers@arri.de \ --to=ceggers@arri.de \ --cc=festevam@gmail.com \ --cc=kernel@pengutronix.de \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-i2c@vger.kernel.org \ --cc=linux-imx@nxp.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux@rempel-privat.de \ --cc=s.hauer@pengutronix.de \ --cc=shawnguo@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.