diff options
Diffstat (limited to 'drivers/counter')
| -rw-r--r-- | drivers/counter/104-quad-8.c | 23 | ||||
| -rw-r--r-- | drivers/counter/stm32-lptimer-cnt.c | 1 |
2 files changed, 19 insertions, 5 deletions
diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c index aa13708c2bc3..78766b6ec271 100644 --- a/drivers/counter/104-quad-8.c +++ b/drivers/counter/104-quad-8.c @@ -1274,18 +1274,26 @@ static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter, struct counter_signal *signal, void *private, char *buf) { - const struct quad8_iio *const priv = counter->priv; + struct quad8_iio *const priv = counter->priv; const size_t channel_id = signal->id / 2; - const bool disabled = !(priv->cable_fault_enable & BIT(channel_id)); + bool disabled; unsigned int status; unsigned int fault; - if (disabled) + mutex_lock(&priv->lock); + + disabled = !(priv->cable_fault_enable & BIT(channel_id)); + + if (disabled) { + mutex_unlock(&priv->lock); return -EINVAL; + } /* Logic 0 = cable fault */ status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); + mutex_unlock(&priv->lock); + /* Mask respective channel and invert logic */ fault = !(status & BIT(channel_id)); @@ -1317,6 +1325,8 @@ static ssize_t quad8_signal_cable_fault_enable_write( if (ret) return ret; + mutex_lock(&priv->lock); + if (enable) priv->cable_fault_enable |= BIT(channel_id); else @@ -1327,6 +1337,8 @@ static ssize_t quad8_signal_cable_fault_enable_write( outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS); + mutex_unlock(&priv->lock); + return len; } @@ -1353,6 +1365,8 @@ static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter, if (ret) return ret; + mutex_lock(&priv->lock); + priv->fck_prescaler[channel_id] = prescaler; /* Reset Byte Pointer */ @@ -1363,6 +1377,8 @@ static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter, outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC, base_offset + 1); + mutex_unlock(&priv->lock); + return len; } @@ -1538,7 +1554,6 @@ static int quad8_probe(struct device *dev, unsigned int id) indio_dev->num_channels = ARRAY_SIZE(quad8_channels); indio_dev->channels = quad8_channels; indio_dev->name = dev_name(dev); - indio_dev->dev.parent = dev; /* Initialize Counter device and driver data */ quad8iio = iio_priv(indio_dev); diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c index 8e276eb655f5..fd6828e2d34f 100644 --- a/drivers/counter/stm32-lptimer-cnt.c +++ b/drivers/counter/stm32-lptimer-cnt.c @@ -648,7 +648,6 @@ static int stm32_lptim_cnt_probe(struct platform_device *pdev) /* Initialize IIO device */ indio_dev->name = dev_name(&pdev->dev); - indio_dev->dev.parent = &pdev->dev; indio_dev->dev.of_node = pdev->dev.of_node; indio_dev->info = &stm32_lptim_cnt_iio_info; if (ddata->has_encoder) |