From c19a02582b9b9b60cbeddfda2d3958ca36f9afc9 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sat, 8 Oct 2016 17:39:05 +0100 Subject: [PATCH] staging:iio:accel:sca3000 Drop custom ABI for watersheds. For now we support only the 50% watershed interrupt and start and stop it as part of the buffer bring up. The 75% case may come back in future. Signed-off-by: Jonathan Cameron Reviewed-by: Lars-Peter Clausen --- drivers/staging/iio/accel/sca3000.c | 111 ++++++++++------------------ 1 file changed, 41 insertions(+), 70 deletions(-) diff --git a/drivers/staging/iio/accel/sca3000.c b/drivers/staging/iio/accel/sca3000.c index 8af7d83e658d..173e9a69d44f 100644 --- a/drivers/staging/iio/accel/sca3000.c +++ b/drivers/staging/iio/accel/sca3000.c @@ -1309,73 +1309,6 @@ static size_t sca3000_ring_buf_data_available(struct iio_buffer *r) return r->stufftoread ? r->watermark : 0; } -/** - * sca3000_query_ring_int() is the hardware ring status interrupt enabled - **/ -static ssize_t sca3000_query_ring_int(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - int ret, val; - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct sca3000_state *st = iio_priv(indio_dev); - - mutex_lock(&st->lock); - ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1); - val = st->rx[0]; - mutex_unlock(&st->lock); - if (ret) - return ret; - - return sprintf(buf, "%d\n", !!(val & this_attr->address)); -} - -/** - * sca3000_set_ring_int() set state of ring status interrupt - **/ -static ssize_t sca3000_set_ring_int(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct sca3000_state *st = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - u8 val; - int ret; - - mutex_lock(&st->lock); - ret = kstrtou8(buf, 10, &val); - if (ret) - goto error_ret; - ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1); - if (ret) - goto error_ret; - if (val) - ret = sca3000_write_reg(st, - SCA3000_REG_ADDR_INT_MASK, - st->rx[0] | this_attr->address); - else - ret = sca3000_write_reg(st, - SCA3000_REG_ADDR_INT_MASK, - st->rx[0] & ~this_attr->address); -error_ret: - mutex_unlock(&st->lock); - - return ret ? ret : len; -} - -static IIO_DEVICE_ATTR(50_percent, S_IRUGO | S_IWUSR, - sca3000_query_ring_int, - sca3000_set_ring_int, - SCA3000_INT_MASK_RING_HALF); - -static IIO_DEVICE_ATTR(75_percent, S_IRUGO | S_IWUSR, - sca3000_query_ring_int, - sca3000_set_ring_int, - SCA3000_INT_MASK_RING_THREE_QUARTER); - static ssize_t sca3000_show_buffer_scale(struct device *dev, struct device_attribute *attr, char *buf) @@ -1399,8 +1332,6 @@ static IIO_DEVICE_ATTR(in_accel_scale, * is available via direct reading from registers. */ static const struct attribute *sca3000_ring_attributes[] = { - &iio_dev_attr_50_percent.dev_attr.attr, - &iio_dev_attr_75_percent.dev_attr.attr, &iio_dev_attr_in_accel_scale.dev_attr.attr, NULL, }; @@ -1491,6 +1422,9 @@ error_ret: **/ static int sca3000_hw_ring_preenable(struct iio_dev *indio_dev) { + int ret; + struct sca3000_state *st = iio_priv(indio_dev); + /* * Set stuff to read to indicate no data present. * Need for cases where the interrupt had fired at the @@ -1504,12 +1438,49 @@ static int sca3000_hw_ring_preenable(struct iio_dev *indio_dev) */ indio_dev->buffer->bytes_per_datum = 6; + mutex_lock(&st->lock); + + /* Enable the 50% full interrupt */ + ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1); + if (ret) + goto error_unlock; + ret = sca3000_write_reg(st, + SCA3000_REG_ADDR_INT_MASK, + st->rx[0] | SCA3000_INT_MASK_RING_HALF); + if (ret) + goto error_unlock; + + mutex_unlock(&st->lock); + return __sca3000_hw_ring_state_set(indio_dev, 1); + +error_unlock: + mutex_unlock(&st->lock); + + return ret; } static int sca3000_hw_ring_postdisable(struct iio_dev *indio_dev) { - return __sca3000_hw_ring_state_set(indio_dev, 0); + int ret; + struct sca3000_state *st = iio_priv(indio_dev); + + ret = __sca3000_hw_ring_state_set(indio_dev, 0); + if (ret) + return ret; + + /* Disable the 50% full interrupt */ + mutex_lock(&st->lock); + + ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1); + if (ret) + goto unlock; + ret = sca3000_write_reg(st, + SCA3000_REG_ADDR_INT_MASK, + st->rx[0] & ~SCA3000_INT_MASK_RING_HALF); +unlock: + mutex_unlock(&st->lock); + return ret; } static const struct iio_buffer_setup_ops sca3000_ring_setup_ops = { -- 2.39.5