Currently we don't handle the supply. We need to add the supply support
to be able to switch the supply off e.g. during a suspend-to-ram
operation. So we can guarantee a correct (re-)initialization.
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
---
drivers/usb/misc/usb251xb.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 6ca9111d150a..05819167604d 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/nls.h>
#include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
#include <linux/slab.h>
/* Internal Register Set Addresses & Default Values acc. to DS00001692C */
@@ -116,6 +117,7 @@
struct usb251xb {
struct device *dev;
struct i2c_client *i2c;
+ struct regulator *vdd;
u8 skip_config;
struct gpio_desc *gpio_reset;
u16 vendor_id;
@@ -420,6 +422,10 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
return err;
}
+ hub->vdd = devm_regulator_get(dev, "vdd");
+ if (IS_ERR(hub->vdd))
+ return PTR_ERR(hub->vdd);
+
if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1))
hub->vendor_id = USB251XB_DEF_VENDOR_ID;
@@ -665,6 +671,10 @@ static int usb251xb_probe(struct usb251xb *hub)
if (err)
return err;
+ err = regulator_enable(hub->vdd);
+ if (err)
+ return err;
+
err = usb251xb_connect(hub);
if (err) {
dev_err(dev, "Failed to connect hub (%d)\n", err);
--
2.20.1
