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path: root/drivers/iio/adc/stx104.c
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Diffstat (limited to 'drivers/iio/adc/stx104.c')
-rw-r--r--drivers/iio/adc/stx104.c72
1 files changed, 32 insertions, 40 deletions
diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index 7e3645749eaf..be2de48844bc 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -76,16 +76,6 @@ struct stx104_gpio {
unsigned int out_state;
};
-/**
- * struct stx104_dev - STX104 device private data structure
- * @indio_dev: IIO device
- * @chip: instance of the gpio_chip
- */
-struct stx104_dev {
- struct iio_dev *indio_dev;
- struct gpio_chip *chip;
-};
-
static int stx104_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val, int *val2, long mask)
{
@@ -266,12 +256,38 @@ static void stx104_gpio_set(struct gpio_chip *chip, unsigned int offset,
spin_unlock_irqrestore(&stx104gpio->lock, flags);
}
+#define STX104_NGPIO 8
+static const char *stx104_names[STX104_NGPIO] = {
+ "DIN0", "DIN1", "DIN2", "DIN3", "DOUT0", "DOUT1", "DOUT2", "DOUT3"
+};
+
+static void stx104_gpio_set_multiple(struct gpio_chip *chip,
+ unsigned long *mask, unsigned long *bits)
+{
+ struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip);
+ unsigned long flags;
+
+ /* verify masked GPIO are output */
+ if (!(*mask & 0xF0))
+ return;
+
+ *mask >>= 4;
+ *bits >>= 4;
+
+ spin_lock_irqsave(&stx104gpio->lock, flags);
+
+ stx104gpio->out_state &= ~*mask;
+ stx104gpio->out_state |= *mask & *bits;
+ outb(stx104gpio->out_state, stx104gpio->base);
+
+ spin_unlock_irqrestore(&stx104gpio->lock, flags);
+}
+
static int stx104_probe(struct device *dev, unsigned int id)
{
struct iio_dev *indio_dev;
struct stx104_iio *priv;
struct stx104_gpio *stx104gpio;
- struct stx104_dev *stx104dev;
int err;
indio_dev = devm_iio_device_alloc(dev, sizeof(*priv));
@@ -282,10 +298,6 @@ static int stx104_probe(struct device *dev, unsigned int id)
if (!stx104gpio)
return -ENOMEM;
- stx104dev = devm_kzalloc(dev, sizeof(*stx104dev), GFP_KERNEL);
- if (!stx104dev)
- return -ENOMEM;
-
if (!devm_request_region(dev, base[id], STX104_EXTENT,
dev_name(dev))) {
dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",
@@ -324,45 +336,26 @@ static int stx104_probe(struct device *dev, unsigned int id)
stx104gpio->chip.parent = dev;
stx104gpio->chip.owner = THIS_MODULE;
stx104gpio->chip.base = -1;
- stx104gpio->chip.ngpio = 8;
+ stx104gpio->chip.ngpio = STX104_NGPIO;
+ stx104gpio->chip.names = stx104_names;
stx104gpio->chip.get_direction = stx104_gpio_get_direction;
stx104gpio->chip.direction_input = stx104_gpio_direction_input;
stx104gpio->chip.direction_output = stx104_gpio_direction_output;
stx104gpio->chip.get = stx104_gpio_get;
stx104gpio->chip.set = stx104_gpio_set;
+ stx104gpio->chip.set_multiple = stx104_gpio_set_multiple;
stx104gpio->base = base[id] + 3;
stx104gpio->out_state = 0x0;
spin_lock_init(&stx104gpio->lock);
- stx104dev->indio_dev = indio_dev;
- stx104dev->chip = &stx104gpio->chip;
- dev_set_drvdata(dev, stx104dev);
-
- err = gpiochip_add_data(&stx104gpio->chip, stx104gpio);
+ err = devm_gpiochip_add_data(dev, &stx104gpio->chip, stx104gpio);
if (err) {
dev_err(dev, "GPIO registering failed (%d)\n", err);
return err;
}
- err = iio_device_register(indio_dev);
- if (err) {
- dev_err(dev, "IIO device registering failed (%d)\n", err);
- gpiochip_remove(&stx104gpio->chip);
- return err;
- }
-
- return 0;
-}
-
-static int stx104_remove(struct device *dev, unsigned int id)
-{
- struct stx104_dev *const stx104dev = dev_get_drvdata(dev);
-
- iio_device_unregister(stx104dev->indio_dev);
- gpiochip_remove(stx104dev->chip);
-
- return 0;
+ return devm_iio_device_register(dev, indio_dev);
}
static struct isa_driver stx104_driver = {
@@ -370,7 +363,6 @@ static struct isa_driver stx104_driver = {
.driver = {
.name = "stx104"
},
- .remove = stx104_remove
};
module_isa_driver(stx104_driver, num_stx104);