Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932199AbbGFMgY (ORCPT ); Mon, 6 Jul 2015 08:36:24 -0400 Received: from mx02.posteo.de ([89.146.194.165]:51163 "EHLO mx02.posteo.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754545AbbGFMgI (ORCPT ); Mon, 6 Jul 2015 08:36:08 -0400 From: Martin Kepplinger To: jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, mfuzzey@parkeon.com, roberta.dobrescu@gmail.com, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org Cc: devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, christoph.muellner@theobroma-systems.com, Martin Kepplinger , Martin Kepplinger Subject: [PATCH 3/8] iio: mma8452: add freefall / motion interrupt source Date: Mon, 6 Jul 2015 14:34:17 +0200 Message-Id: <1436186062-5766-4-git-send-email-martink@posteo.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1436186062-5766-1-git-send-email-martink@posteo.de> References: <1436186062-5766-1-git-send-email-martink@posteo.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4340 Lines: 123 This adds the freefall / motion interrupt source definitions to the driver. It is used in this series' next patch, for chips that don't support the transient interrupt source. The iio event type is IIO_EV_TYPE_MAG since the threshold for comparison is no signed value. An interrupt occurs on positive and negative values when the magnitude crosses the threshold value. Signed-off-by: Martin Kepplinger Signed-off-by: Christoph Muellner --- drivers/iio/accel/mma8452.c | 45 ++++++++++++++++++++++++++++++++++++--------- 1 file changed, 36 insertions(+), 9 deletions(-) diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 71b40f7..1337707 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -38,9 +38,18 @@ #define MMA8452_DATA_CFG 0x0e #define MMA8452_HP_FILTER_CUTOFF 0x0f #define MMA8452_HP_FILTER_CUTOFF_SEL_MASK (BIT(0) | BIT(1)) +#define MMA8452_FF_MT_CFG 0x15 +#define MMA8452_FF_MT_CFG_OAE BIT(6) +#define MMA8452_FF_MT_CFG_ELE BIT(7) +#define MMA8452_FF_MT_SRC 0x16 +#define MMA8452_FF_MT_SRC_XHE BIT(1) +#define MMA8452_FF_MT_SRC_YHE BIT(3) +#define MMA8452_FF_MT_SRC_ZHE BIT(5) +#define MMA8452_FF_MT_THS 0x17 +#define MMA8452_FF_MT_THS_MASK 0x7f +#define MMA8452_FF_MT_COUNT 0x18 #define MMA8452_TRANSIENT_CFG 0x1d #define MMA8452_TRANSIENT_CFG_ELE BIT(4) -#define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1) #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0) #define MMA8452_TRANSIENT_SRC 0x1e #define MMA8452_TRANSIENT_SRC_XTRANSE BIT(1) @@ -74,6 +83,7 @@ #define MMA8452_DATA_CFG_HPF_MASK BIT(4) #define MMA8452_INT_DRDY BIT(0) +#define MMA8452_INT_FF_MT BIT(2) #define MMA8452_INT_TRANS BIT(5) #define MMA8452_DEVICE_ID 0x2a @@ -591,7 +601,8 @@ static int mma8452_write_event_config(struct iio_dev *indio_dev, else val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift); - val |= MMA8452_TRANSIENT_CFG_ELE; + val |= chip->ev_cfg_ele; + val |= MMA8452_FF_MT_CFG_OAE; return mma8452_change_config(data, chip->ev_cfg, val); } @@ -632,6 +643,7 @@ static irqreturn_t mma8452_interrupt(int irq, void *p) { struct iio_dev *indio_dev = p; struct mma8452_data *data = iio_priv(indio_dev); + const struct mma_chip_info *chip = data->chip_info; int ret = IRQ_NONE; int src; @@ -644,7 +656,10 @@ static irqreturn_t mma8452_interrupt(int irq, void *p) ret = IRQ_HANDLED; } - if (src & MMA8452_INT_TRANS) { + if ((src & MMA8452_INT_TRANS && + chip->ev_src == MMA8452_TRANSIENT_SRC) || + (src & MMA8452_INT_FF_MT && + chip->ev_src == MMA8452_FF_MT_SRC)) { mma8452_transient_interrupt(indio_dev); ret = IRQ_HANDLED; } @@ -705,6 +720,16 @@ static const struct iio_event_spec mma8452_transient_event[] = { }, }; +static const struct iio_event_spec mma8452_motion_event[] = { + { + .type = IIO_EV_TYPE_MAG, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_PERIOD) + }, +}; + /* * Threshold is configured in fixed 8G/127 steps regardless of * currently selected scale for measurement. @@ -988,13 +1013,15 @@ static int mma8452_probe(struct i2c_client *client, if (client->irq) { /* - * Although we enable the transient interrupt source once and - * for all here the transient event detection itself is not - * enabled until userspace asks for it by - * mma8452_write_event_config() + * Although we enable the interrupt sources once and for + * all here the event detection itself is not enabled until + * userspace asks for it by mma8452_write_event_config() */ - int supported_interrupts = MMA8452_INT_DRDY | MMA8452_INT_TRANS; - int enabled_interrupts = MMA8452_INT_TRANS; + int supported_interrupts = MMA8452_INT_DRDY | + MMA8452_INT_TRANS | + MMA8452_INT_FF_MT; + int enabled_interrupts = MMA8452_INT_TRANS | + MMA8452_INT_FF_MT; /* Assume wired to INT1 pin */ ret = i2c_smbus_write_byte_data(client, -- 2.1.4 -- 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/