[PATCH 3/5] W1: w1-gpio - guard DT IDs with CONFIG_OF

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

This fixes the following warning:

  CC      drivers/w1/masters/w1-gpio.o
drivers/w1/masters/w1-gpio.c:50:28: warning: ‘w1_gpio_dt_ids’ defined but not used [-Wunused-variable]

Also provide stub for w1_gpio_probe_dt() if device tree support is
disabled.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/w1/masters/w1-gpio.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c
index c45b9ae..aa97a96 100644
--- a/drivers/w1/masters/w1-gpio.c
+++ b/drivers/w1/masters/w1-gpio.c
@@ -47,6 +47,8 @@ static u8 w1_gpio_read_bit(void *data)
 	return gpio_get_value(pdata->pin) ? 1 : 0;
 }
 
+#ifdef CONFIG_OF
+
 static struct of_device_id w1_gpio_dt_ids[] = {
 	{ .compatible = "w1-gpio" },
 	{}
@@ -72,6 +74,15 @@ static int w1_gpio_probe_dt(struct platform_device *pdev)
 	return 0;
 }
 
+#else
+
+static inline int w1_gpio_probe_dt(struct platform_device *pdev)
+{
+	return -ENOSYS;
+}
+
+#endif
+
 static int w1_gpio_probe(struct platform_device *pdev)
 {
 	struct w1_bus_master *master;
-- 
1.7.11.7