static int __init w1_gpio_probe(struct platform_device *pdev)
{
struct w1_bus_master *master;
struct w1_gpio_platform_data *pdata;
struct pinctrl *pinctrl;
int err;
pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
if (IS_ERR(pinctrl))
dev_warn(&pdev->dev, "unable to select pin group\n");
if (of_have_populated_dt()) {
err = w1_gpio_probe_dt(pdev);
if (err < 0) {
dev_err(&pdev->dev, "Failed to parse DT\n");
return err;
}
}
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "No configuration data\n");
return -ENXIO;
}
master = kzalloc(sizeof(struct w1_bus_master), GFP_KERNEL);
if (!master) {
dev_err(&pdev->dev, "Out of memory\n");
return -ENOMEM;
}
err = gpio_request(pdata->pin, "w1");
if (err) {
dev_err(&pdev->dev, "gpio_request (pin) failed\n");
goto free_master;
}
if (gpio_is_valid(pdata->ext_pullup_enable_pin)) {
err = gpio_request_one(pdata->ext_pullup_enable_pin,
GPIOF_INIT_LOW, "w1 pullup");
if (err < 0) {
dev_err(&pdev->dev, "gpio_request_one "
"(ext_pullup_enable_pin) failed\n");
goto free_gpio;
}
}
master->data = pdata;
master->read_bit = w1_gpio_read_bit;
if (pdata->is_open_drain) {
gpio_direction_output(pdata->pin, 1);
master->write_bit = w1_gpio_write_bit_val;
} else {
gpio_direction_input(pdata->pin);
master->write_bit = w1_gpio_write_bit_dir;
}
err = w1_add_master_device(master);
if (err) {
dev_err(&pdev->dev, "w1_add_master device failed\n");
goto free_gpio_ext_pu;
}
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(1);
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_set_value(pdata->ext_pullup_enable_pin, 1);
platform_set_drvdata(pdev, master);
return 0;
free_gpio_ext_pu:
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_free(pdata->ext_pullup_enable_pin);
free_gpio:
gpio_free(pdata->pin);
free_master:
kfree(master);
return err;
}
static int __init w1_gpio_probe(struct platform_device *pdev)
{
struct w1_bus_master *master;
struct w1_gpio_platform_data *pdata;
int err;
err = w1_gpio_probe_dt(pdev);
if (err < 0)
return err;
pdata = pdev->dev.platform_data;
if (!pdata)
return -ENXIO;
master = kzalloc(sizeof(struct w1_bus_master), GFP_KERNEL);
if (!master)
return -ENOMEM;
err = gpio_request(pdata->pin, "w1");
if (err)
goto free_master;
if (gpio_is_valid(pdata->ext_pullup_enable_pin)) {
err = gpio_request_one(pdata->ext_pullup_enable_pin,
GPIOF_INIT_LOW, "w1 pullup");
if (err < 0)
goto free_gpio;
}
master->data = pdata;
master->read_bit = w1_gpio_read_bit;
if (pdata->is_open_drain) {
gpio_direction_output(pdata->pin, 1);
master->write_bit = w1_gpio_write_bit_val;
} else {
gpio_direction_input(pdata->pin);
master->write_bit = w1_gpio_write_bit_dir;
}
err = w1_add_master_device(master);
if (err)
goto free_gpio_ext_pu;
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(1);
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_set_value(pdata->ext_pullup_enable_pin, 1);
platform_set_drvdata(pdev, master);
return 0;
free_gpio_ext_pu:
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_free(pdata->ext_pullup_enable_pin);
free_gpio:
gpio_free(pdata->pin);
free_master:
kfree(master);
return err;
}
static int w1_gpio_probe(struct platform_device *pdev)
{
struct w1_bus_master *master;
struct w1_gpio_platform_data *pdata;
struct pinctrl *pinctrl;
int err;
pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
if (IS_ERR(pinctrl))
dev_warn(&pdev->dev, "unable to select pin group\n");
if (of_have_populated_dt()) {
err = w1_gpio_probe_dt(pdev);
if (err < 0) {
dev_err(&pdev->dev, "Failed to parse DT\n");
return err;
}
}
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "No configuration data\n");
return -ENXIO;
}
master = kzalloc(sizeof(struct w1_bus_master), GFP_KERNEL);
if (!master) {
dev_err(&pdev->dev, "Out of memory\n");
return -ENOMEM;
}
err = gpio_request(pdata->pin, "w1");
if (err) {
dev_err(&pdev->dev, "gpio_request (pin) failed\n");
goto free_master;
}
if (gpio_is_valid(pdata->ext_pullup_enable_pin)) {
err = gpio_request_one(pdata->ext_pullup_enable_pin,
GPIOF_INIT_LOW, "w1 pullup");
if (err < 0) {
dev_err(&pdev->dev, "gpio_request_one "
"(ext_pullup_enable_pin) failed\n");
goto free_gpio;
}
}
master->data = pdata;
master->read_bit = w1_gpio_read_bit;
if (pdata->is_open_drain) {
gpio_direction_output(pdata->pin, 1);
master->write_bit = w1_gpio_write_bit_val;
} else {
gpio_direction_input(pdata->pin);
master->write_bit = w1_gpio_write_bit_dir;
}
err = w1_add_master_device(master);
if (err) {
dev_err(&pdev->dev, "w1_add_master device failed\n");
goto free_gpio_ext_pu;
}
/* voltage regulator support */
pdata->regulator_en = 0;
pdata->w1_gpio_vdd = regulator_get(&pdev->dev, "w1_vdd");
if (IS_ERR(pdata->w1_gpio_vdd)) {
pdata->w1_gpio_vdd = NULL;
dev_err(&pdev->dev,
"%s: Failed to get w1_vdd regulator\n",
__func__);
} else {
dev_err(&pdev->dev, "w1-vdd regulator is initially %s\n",
regulator_is_enabled(pdata->w1_gpio_vdd) ?
"on" : "off");
err = regulator_enable(pdata->w1_gpio_vdd);
if (err) {
pr_err("%s: Error %d enabling w1-vdd regulator\n",
__func__, err);
goto free_regulator;
} else {
pdata->regulator_en = 1;
}
}
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(1);
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_set_value(pdata->ext_pullup_enable_pin, 1);
platform_set_drvdata(pdev, master);
return 0;
free_regulator:
if (pdata->w1_gpio_vdd != NULL)
regulator_put(pdata->w1_gpio_vdd);
free_gpio_ext_pu:
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_free(pdata->ext_pullup_enable_pin);
free_gpio:
gpio_free(pdata->pin);
free_master:
kfree(master);
return err;
}
static int w1_gpio_probe(struct platform_device *pdev)
{
struct w1_bus_master *master;
struct w1_gpio_platform_data *pdata = pdev->dev.platform_data;
int err;
if(pdata == NULL) {
if (of_have_populated_dt()) {
err = w1_gpio_probe_dt(pdev);
if (err < 0)
return err;
}
}
pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "No configuration data\n");
return -ENXIO;
}
master = devm_kzalloc(&pdev->dev, sizeof(struct w1_bus_master),
GFP_KERNEL);
if (!master) {
dev_err(&pdev->dev, "Out of memory\n");
return -ENOMEM;
}
w1_gpio_pin_orig = pdata->pin;
w1_gpio_pullup_pin_orig = pdata->ext_pullup_enable_pin;
w1_gpio_pullup_orig = pdata->parasitic_power;
if(gpio_is_valid(w1_gpio_pin)) {
pdata->pin = w1_gpio_pin;
pdata->ext_pullup_enable_pin = -1;
pdata->parasitic_power = -1;
}
pdata->parasitic_power |= w1_gpio_pullup;
if(gpio_is_valid(w1_gpio_pullup_pin)) {
pdata->ext_pullup_enable_pin = w1_gpio_pullup_pin;
}
dev_info(&pdev->dev, "gpio pin %d, external pullup pin %d, parasitic power %d\n", pdata->pin, pdata->ext_pullup_enable_pin, pdata->parasitic_power);
err = devm_gpio_request(&pdev->dev, pdata->pin, "w1");
if (err) {
dev_err(&pdev->dev, "gpio_request (pin) failed\n");
return err;
}
if (gpio_is_valid(pdata->ext_pullup_enable_pin)) {
err = devm_gpio_request_one(&pdev->dev,
pdata->ext_pullup_enable_pin, GPIOF_INIT_LOW,
"w1 pullup");
if (err < 0) {
dev_err(&pdev->dev, "gpio_request_one "
"(ext_pullup_enable_pin) failed\n");
return err;
}
}
master->data = pdata;
master->read_bit = w1_gpio_read_bit;
if (pdata->is_open_drain) {
gpio_direction_output(pdata->pin, 1);
master->write_bit = w1_gpio_write_bit_val;
} else {
gpio_direction_input(pdata->pin);
master->write_bit = w1_gpio_write_bit_dir;
master->set_pullup = w1_gpio_set_pullup;
}
if (pdata->parasitic_power) {
if (pdata->is_open_drain)
printk(KERN_ERR "w1-gpio 'pullup'(parasitic power) "
"option doesn't work with open drain GPIO\n");
else
master->bitbang_pullup = w1_gpio_bitbang_pullup;
}
err = w1_add_master_device(master);
if (err) {
dev_err(&pdev->dev, "w1_add_master device failed\n");
return err;
}
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(1);
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_set_value(pdata->ext_pullup_enable_pin, 1);
platform_set_drvdata(pdev, master);
return 0;
}
static int w1_gpio_probe(struct platform_device *pdev)
{
struct w1_bus_master *master;
struct w1_gpio_platform_data *pdata;
int err;
if (of_have_populated_dt()) {
err = w1_gpio_probe_dt(pdev);
if (err < 0)
return err;
}
pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "No configuration data\n");
return -ENXIO;
}
master = devm_kzalloc(&pdev->dev, sizeof(struct w1_bus_master),
GFP_KERNEL);
if (!master) {
dev_err(&pdev->dev, "Out of memory\n");
return -ENOMEM;
}
err = devm_gpio_request(&pdev->dev, pdata->pin, "w1");
if (err) {
dev_err(&pdev->dev, "gpio_request (pin) failed\n");
return err;
}
if (gpio_is_valid(pdata->ext_pullup_enable_pin)) {
err = devm_gpio_request_one(&pdev->dev,
pdata->ext_pullup_enable_pin, GPIOF_INIT_LOW,
"w1 pullup");
if (err < 0) {
dev_err(&pdev->dev, "gpio_request_one "
"(ext_pullup_enable_pin) failed\n");
return err;
}
}
master->data = pdata;
master->read_bit = w1_gpio_read_bit;
if (pdata->is_open_drain) {
gpio_direction_output(pdata->pin, 1);
master->write_bit = w1_gpio_write_bit_val;
} else {
gpio_direction_input(pdata->pin);
master->write_bit = w1_gpio_write_bit_dir;
master->set_pullup = w1_gpio_set_pullup;
}
err = w1_add_master_device(master);
if (err) {
dev_err(&pdev->dev, "w1_add_master device failed\n");
return err;
}
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(1);
if (gpio_is_valid(pdata->ext_pullup_enable_pin))
gpio_set_value(pdata->ext_pullup_enable_pin, 1);
platform_set_drvdata(pdev, master);
return 0;
}
