Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754386AbbKJQHx (ORCPT ); Tue, 10 Nov 2015 11:07:53 -0500 Received: from mail-wm0-f41.google.com ([74.125.82.41]:38889 "EHLO mail-wm0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753377AbbKJQHv (ORCPT ); Tue, 10 Nov 2015 11:07:51 -0500 From: Marc Titinger To: jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, mturquette@baylibre.com, bcousson@baylibre.com, ptitiano@baylibre.com, Marc Titinger Subject: [RFC 0/4] IIO: add support for INA2xx power monitor Date: Tue, 10 Nov 2015 17:07:29 +0100 Message-Id: <1447171653-12756-1-git-send-email-mtitinger@baylibre.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1620 Lines: 38 This chip has fair support in the hwmon stack already, this work is more as a pathfinder for me, hence I post it as RFC to digg some more into 'does and donts' with IIO. Nevertheless, it provides a working streaming scheme for capturing power/voltage/current with this chip. It works in local and remote mode with iio_readdev and I did some sniffing tests with iio-oscilloscope with promising results inspite of timeout issues for long temporal buffers presumably due to the slow rates for this chip compared to expected high-speed CoDecs (and maybe the lack of a proper plugin?). The kthread I'm using does an active waiting to allow for sampling periods shorter than a tick. I have not experienced performance issues with it on the board (BeagleBoneBlack), IIOD could always schedule on time as far as I could see, maybe with other i2c backends a schedule() could be mandatory ? Many thanks, Marc Titinger (4): iio: ina2xx: add direct IO support for TI INA2xx Power Monitors iio: ina2xx: add SAMP_FREQ attribute. iio: ina2xx: add debugfs reg access iio: ina2xx: add SOFTWARE buffer mode using an iio kfifo. drivers/iio/adc/Kconfig | 11 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/ina2xx-iio.c | 579 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 591 insertions(+) create mode 100644 drivers/iio/adc/ina2xx-iio.c -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/