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Fri, 29 May 2026 20:20:25 -0700 (PDT) From: Chris Morgan To: linux-iio@vger.kernel.org Cc: andy@kernel.org, nuno.sa@analog.com, dlechner@baylibre.com, jic23@kernel.org, jean-baptiste.maneyrol@tdk.com, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, andriy.shevchenko@intel.com, Chris Morgan Subject: [PATCH V9 09/11] iio: imu: inv_icm42607: Add IRQ for icm42607 Date: Fri, 29 May 2026 22:17:36 -0500 Message-ID: <20260530031739.109063-10-macroalpha82@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260530031739.109063-1-macroalpha82@gmail.com> References: <20260530031739.109063-1-macroalpha82@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chris Morgan Add IRQ support for the icm42607 driver. Signed-off-by: Chris Morgan --- .../iio/imu/inv_icm42607/inv_icm42607_core.c | 97 ++++++++++++++++++- 1 file changed, 96 insertions(+), 1 deletion(-) diff --git a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c index 6b623fb679f3..3c91623dffb2 100644 --- a/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c +++ b/drivers/iio/imu/inv_icm42607/inv_icm42607_core.c @@ -331,6 +331,91 @@ static int inv_icm42607_setup(struct inv_icm42607_state *st, return inv_icm42607_set_conf(st, st->hw->conf); } +static irqreturn_t inv_icm42607_irq_timestamp(int irq, void *_data) +{ + struct inv_icm42607_state *st = _data; + + st->timestamp.accel = iio_get_time_ns(st->indio_accel); + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t inv_icm42607_irq_handler(int irq, void *_data) +{ + struct inv_icm42607_state *st = _data; + struct device *dev = regmap_get_device(st->map); + unsigned int status; + int ret; + + mutex_lock(&st->lock); + + ret = regmap_read(st->map, INV_ICM42607_REG_INT_STATUS, &status); + if (ret) { + dev_err(dev, "Interrut status read error %d\n", ret); + goto out_unlock; + } + + if (status & INV_ICM42607_INT_STATUS_FIFO_FULL) + dev_warn(dev, "FIFO full data lost!\n"); + + if (status & INV_ICM42607_INT_STATUS_FIFO_THS) { + mutex_unlock(&st->lock); + ret = inv_icm42607_buffer_fifo_read(st, 0); + if (ret) { + dev_err(dev, "FIFO read error %d\n", ret); + goto out_unlock; + } + + mutex_lock(&st->lock); + ret = inv_icm42607_buffer_fifo_parse(st); + if (ret) + dev_err(dev, "FIFO parsing error %d\n", ret); + } + +out_unlock: + mutex_unlock(&st->lock); + return IRQ_HANDLED; +} + +static int inv_icm42607_irq_init(struct inv_icm42607_state *st, int irq, + int irq_type, bool open_drain) +{ + struct device *dev = regmap_get_device(st->map); + unsigned int val = 0; + int ret; + + switch (irq_type) { + case IRQF_TRIGGER_RISING: + case IRQF_TRIGGER_HIGH: + val = INV_ICM42607_INT_CONFIG_INT1_ACTIVE_HIGH; + break; + default: + val = INV_ICM42607_INT_CONFIG_INT1_ACTIVE_LOW; + break; + } + + switch (irq_type) { + case IRQF_TRIGGER_LOW: + case IRQF_TRIGGER_HIGH: + val |= INV_ICM42607_INT_CONFIG_INT1_LATCHED; + break; + default: + break; + } + + if (!open_drain) + val |= INV_ICM42607_INT_CONFIG_INT1_PUSH_PULL; + + ret = regmap_write(st->map, INV_ICM42607_REG_INT_CONFIG, val); + if (ret) + return ret; + + irq_type |= IRQF_ONESHOT; + return devm_request_threaded_irq(dev, irq, inv_icm42607_irq_timestamp, + inv_icm42607_irq_handler, irq_type, + st->hw->name, st); +} + static int inv_icm42607_enable_vddio_reg(struct inv_icm42607_state *st) { int ret; @@ -367,13 +452,18 @@ int inv_icm42607_core_probe(struct regmap *regmap, { struct device *dev = regmap_get_device(regmap); struct inv_icm42607_state *st; - int irq; + int irq, irq_type; + bool open_drain; int ret; irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT1"); if (irq < 0) return dev_err_probe(dev, irq, "Unable to get INT1 interrupt\n"); + irq_type = irq_get_trigger_type(irq); + + open_drain = device_property_read_bool(dev, "drive-open-drain"); + st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL); if (!st) return -ENOMEM; @@ -433,6 +523,11 @@ int inv_icm42607_core_probe(struct regmap *regmap, if (IS_ERR(st->indio_accel)) return PTR_ERR(st->indio_accel); + /* Initialize interrupt handling */ + ret = inv_icm42607_irq_init(st, irq, irq_type, open_drain); + if (ret) + return ret; + return 0; } EXPORT_SYMBOL_NS_GPL(inv_icm42607_core_probe, "IIO_ICM42607"); -- 2.43.0