static int i2c_arbitrator_remove(struct platform_device *pdev)
{
struct i2c_arbitrator_data *arb = platform_get_drvdata(pdev);
i2c_del_mux_adapter(arb->child);
i2c_put_adapter(arb->parent);
return 0;
}
static int __devexit gpiomux_remove(struct platform_device *pdev)
{
struct gpiomux *mux = platform_get_drvdata(pdev);
int i;
for (i = 0; i < mux->data.n_values; i++)
i2c_del_mux_adapter(mux->adap[i]);
for (i = 0; i < mux->data.n_gpios; i++)
gpio_free(mux->data.gpios[i]);
platform_set_drvdata(pdev, NULL);
i2c_put_adapter(mux->parent);
kfree(mux->adap);
kfree(mux);
return 0;
}
static int __devinit gpiomux_probe(struct platform_device *pdev)
{
struct gpiomux *mux;
struct gpio_i2cmux_platform_data *pdata;
struct i2c_adapter *parent;
int (*deselect) (struct i2c_adapter *, void *, u32);
unsigned initial_state;
int i, ret;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "Missing platform data\n");
return -ENODEV;
}
parent = i2c_get_adapter(pdata->parent);
if (!parent) {
dev_err(&pdev->dev, "Parent adapter (%d) not found\n",
pdata->parent);
return -ENODEV;
}
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux) {
ret = -ENOMEM;
goto alloc_failed;
}
mux->parent = parent;
mux->data = *pdata;
mux->adap = kzalloc(sizeof(struct i2c_adapter *) * pdata->n_values,
GFP_KERNEL);
if (!mux->adap) {
ret = -ENOMEM;
goto alloc_failed2;
}
if (pdata->idle != GPIO_I2CMUX_NO_IDLE) {
initial_state = pdata->idle;
deselect = gpiomux_deselect;
} else {
initial_state = pdata->values[0];
deselect = NULL;
}
for (i = 0; i < pdata->n_gpios; i++) {
ret = gpio_request(pdata->gpios[i], "gpio-i2cmux");
if (ret)
goto err_request_gpio;
gpio_direction_output(pdata->gpios[i],
initial_state & (1 << i));
}
for (i = 0; i < pdata->n_values; i++) {
u32 nr = pdata->base_nr ? (pdata->base_nr + i) : 0;
mux->adap[i] = i2c_add_mux_adapter(parent, mux, nr, i,
gpiomux_select, deselect);
if (!mux->adap[i]) {
ret = -ENODEV;
dev_err(&pdev->dev, "Failed to add adapter %d\n", i);
goto add_adapter_failed;
}
}
dev_info(&pdev->dev, "%d port mux on %s adapter\n",
pdata->n_values, parent->name);
platform_set_drvdata(pdev, mux);
return 0;
add_adapter_failed:
for (; i > 0; i--)
i2c_del_mux_adapter(mux->adap[i - 1]);
i = pdata->n_gpios;
err_request_gpio:
for (; i > 0; i--)
gpio_free(pdata->gpios[i - 1]);
kfree(mux->adap);
alloc_failed2:
kfree(mux);
alloc_failed:
i2c_put_adapter(parent);
return ret;
}