From patchwork Wed Sep 11 06:50:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 11140409 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8CF1A76 for ; Wed, 11 Sep 2019 06:50:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6C48D21D79 for ; Wed, 11 Sep 2019 06:50:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568184637; bh=RGeV+WKkRkFn1fkbLOfYy/j9Z7M/qKew358HaObcgDs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qUNmfEU9DDIoJb6RSgEW0FtzmofVt7VqXGGnTDA2E0dQ+1Br/eeflTcd6om3ZJ/Lr qakHsNTu3EI8QG/jrCZlpBJ0t6NI4OoLUcqgnlIsfRvF1kWSOgJiDwudSgC7me9qve GHUwtomFvR1BHtH7plK+CaOV04FLrSrt6u27TRpg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726952AbfIKGuh (ORCPT ); Wed, 11 Sep 2019 02:50:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:43138 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726899AbfIKGug (ORCPT ); Wed, 11 Sep 2019 02:50:36 -0400 Received: from localhost.localdomain.com (nat-pool-mxp-t.redhat.com [149.6.153.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9486521A4C; Wed, 11 Sep 2019 06:50:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568184636; bh=RGeV+WKkRkFn1fkbLOfYy/j9Z7M/qKew358HaObcgDs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tpPrDo2jhYJEaex7w8SghOCDK/hzJAiHnoR5xUfW/ogVflGXQfGfnLKDy//A5QxqV X4mjZrGWfARaS6VlfOmWpcgW8zA1ucfjuax86Nl6nrhhnSthrQqfKvV3usXdfOavXt cT2WHDCbDnkY2EgdxNDWbz+c5Xf/RpGlTiHr+07E= From: Lorenzo Bianconi To: jic23@kernel.org Cc: sean@geanix.com, lorenzo.bianconi@redhat.com, linux-iio@vger.kernel.org, mario.tesi@st.com, armando.visconti@st.com, denis.ciocca@st.com Subject: [PATCH 2/2] iio: imu: st_lsm6dsx: enable clear on read for latched interrupts Date: Wed, 11 Sep 2019 08:50:04 +0200 Message-Id: X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Enable clear on read feature for latched interrupts. This bit allows immediately clearing the latched interrupts of an event detection upon the read of the corresponding status register. It must be set to 1 together with LIR. This feature is available just on LSM6DS0/LSM6DSR/ASM330LHH Signed-off-by: Lorenzo Bianconi Tested-by: Sean Nyekjaer --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 2 ++ drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 24 ++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index 3ea0dc13d101..fefd9042590a 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -216,6 +216,7 @@ struct st_lsm6dsx_ext_dev_settings { * @decimator: List of decimator register info (addr + mask). * @batch: List of FIFO batching register info (addr + mask). * @lir: Latched interrupt register info (addr + mask). + * @clear_on_read: Clear on read register info (addr + mask). * @fifo_ops: Sensor hw FIFO parameters. * @ts_settings: Hw timer related settings. * @shub_settings: i2c controller related settings. @@ -239,6 +240,7 @@ struct st_lsm6dsx_settings { struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID]; struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID]; struct st_lsm6dsx_reg lir; + struct st_lsm6dsx_reg clear_on_read; struct st_lsm6dsx_fifo_ops fifo_ops; struct st_lsm6dsx_hw_ts_settings ts_settings; struct st_lsm6dsx_shub_settings shub_settings; diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index a208da865efe..b65a6ca775e0 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -601,6 +601,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x56, .mask = BIT(0), }, + .clear_on_read = { + .addr = 0x56, + .mask = BIT(6), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -735,6 +739,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x56, .mask = BIT(0), }, + .clear_on_read = { + .addr = 0x56, + .mask = BIT(6), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -846,6 +854,10 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = { .addr = 0x56, .mask = BIT(0), }, + .clear_on_read = { + .addr = 0x56, + .mask = BIT(6), + }, .fifo_ops = { .update_fifo = st_lsm6dsx_update_fifo, .read_fifo = st_lsm6dsx_read_tagged_fifo, @@ -1449,6 +1461,18 @@ static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw) hw->settings->lir.mask, data); if (err < 0) return err; + + /* enable clear on read for latched interrupts */ + if (hw->settings->clear_on_read.addr) { + data = ST_LSM6DSX_SHIFT_VAL(1, + hw->settings->clear_on_read.mask); + err = regmap_update_bits(hw->regmap, + hw->settings->clear_on_read.addr, + hw->settings->clear_on_read.mask, + data); + if (err < 0) + return err; + } } err = st_lsm6dsx_init_shub(hw);