From: Michael Hennerich Date: Tue, 12 Oct 2010 08:30:51 +0000 (+0200) Subject: staging: iio: adc: ad799x miscellaneous cleanups X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1139df53533e8a4327f3867c6b32202ac62b19ee;p=linux-beck.git staging: iio: adc: ad799x miscellaneous cleanups -Simplify by using iio_alloc_pollfunc helper function -Print in_scale in decimal format. -Simplify ring pointer dereferences Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c index 35fad73f0ebf..6309d521a864 100644 --- a/drivers/staging/iio/adc/ad799x_core.c +++ b/drivers/staging/iio/adc/ad799x_core.c @@ -428,14 +428,11 @@ static ssize_t ad799x_show_scale(struct device *dev, /* Driver currently only support internal vref */ struct iio_dev *dev_info = dev_get_drvdata(dev); struct ad799x_state *st = iio_dev_get_devdata(dev_info); + /* Corresponds to Vref / 2^(bits) */ + unsigned int scale_uv = (st->int_vref_mv * 1000) >> st->chip_info->bits; - if ((1 << (st->chip_info->bits + 1)) - > st->int_vref_mv) - return sprintf(buf, "0.5\n"); - else - return sprintf(buf, "%d\n", - st->int_vref_mv >> st->chip_info->bits); + return sprintf(buf, "%d.%d\n", scale_uv / 1000, scale_uv % 1000); } static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad799x_show_scale, NULL, 0); diff --git a/drivers/staging/iio/adc/ad799x_ring.c b/drivers/staging/iio/adc/ad799x_ring.c index c6871fa068ed..975cdcbf0830 100644 --- a/drivers/staging/iio/adc/ad799x_ring.c +++ b/drivers/staging/iio/adc/ad799x_ring.c @@ -32,6 +32,7 @@ int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask) struct iio_ring_buffer *ring = st->indio_dev->ring; int count = 0, ret; u16 *ring_data; + if (!(ring->scan_mask & mask)) { ret = -EBUSY; goto error_ret; @@ -70,6 +71,7 @@ error_ret: **/ static int ad799x_ring_preenable(struct iio_dev *indio_dev) { + struct iio_ring_buffer *ring = indio_dev->ring; struct ad799x_state *st = indio_dev->dev_data; size_t d_size; unsigned long numvals; @@ -80,16 +82,15 @@ static int ad799x_ring_preenable(struct iio_dev *indio_dev) */ if (st->id == ad7997 || st->id == ad7998) - ad799x_set_scan_mode(st, st->indio_dev->ring->scan_mask); + ad799x_set_scan_mode(st, ring->scan_mask); - numvals = st->indio_dev->ring->scan_count; + numvals = ring->scan_count; - if (indio_dev->ring->access.set_bytes_per_datum) { + if (ring->access.set_bytes_per_datum) { d_size = numvals*2 + sizeof(s64); if (d_size % 8) d_size += 8 - (d_size % 8); - indio_dev->ring->access.set_bytes_per_datum(indio_dev->ring, - d_size); + ring->access.set_bytes_per_datum(ring, d_size); } return 0; @@ -124,14 +125,15 @@ static void ad799x_poll_bh_to_ring(struct work_struct *work_s) struct ad799x_state *st = container_of(work_s, struct ad799x_state, poll_work); struct iio_dev *indio_dev = st->indio_dev; - struct iio_sw_ring_buffer *ring = iio_to_sw_ring(indio_dev->ring); + struct iio_ring_buffer *ring = indio_dev->ring; + struct iio_sw_ring_buffer *ring_sw = iio_to_sw_ring(indio_dev->ring); s64 time_ns; __u8 *rxbuf; int b_sent; size_t d_size; u8 cmd; - unsigned long numvals = st->indio_dev->ring->scan_count; + unsigned long numvals = ring->scan_count; /* Ensure the timestamp is 8 byte aligned */ d_size = numvals*2 + sizeof(s64); @@ -158,14 +160,13 @@ static void ad799x_poll_bh_to_ring(struct work_struct *work_s) case ad7991: case ad7995: case ad7999: - cmd = st->config | (st->indio_dev->ring->scan_mask << - AD799X_CHANNEL_SHIFT); + cmd = st->config | (ring->scan_mask << AD799X_CHANNEL_SHIFT); break; case ad7992: case ad7993: case ad7994: - cmd = (st->indio_dev->ring->scan_mask << - AD799X_CHANNEL_SHIFT) | AD7998_CONV_RES_REG; + cmd = (ring->scan_mask << AD799X_CHANNEL_SHIFT) | + AD7998_CONV_RES_REG; break; case ad7997: case ad7998: @@ -184,7 +185,7 @@ static void ad799x_poll_bh_to_ring(struct work_struct *work_s) memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns)); - indio_dev->ring->access.store_to(&ring->buf, rxbuf, time_ns); + ring->access.store_to(&ring_sw->buf, rxbuf, time_ns); done: kfree(rxbuf); atomic_dec(&st->protect_ring); @@ -203,14 +204,9 @@ int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev) } /* Effectively select the ring buffer implementation */ iio_ring_sw_register_funcs(&st->indio_dev->ring->access); - indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL); - if (indio_dev->pollfunc == NULL) { - ret = -ENOMEM; + ret = iio_alloc_pollfunc(indio_dev, NULL, &ad799x_poll_func_th); + if (ret) goto error_deallocate_sw_rb; - } - /* Configure the polling function called on trigger interrupts */ - indio_dev->pollfunc->poll_func_main = &ad799x_poll_func_th; - indio_dev->pollfunc->private_data = indio_dev; /* Ring buffer functions - here trigger setup related */