[PATCH 5/7] usb: dwc2: remove non-functional clock gating

Marek Szyprowski
2015-08-21T12:39:44Z

During typical gadget operation, dwc2 clock was enabled 3 times: from
dwc2_gadget_init(), s3c_hsotg_udc_start() and s3c_hsotg_pullup(), and then
disabled in s3c_hsotg_pullup(), s3c_hsotg_udc_stop() and
s3c_hsotg_remove(). This really makes no sense, so leave clock control
code only in dwc2_gadget_init/remove functions.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
drivers/usb/dwc2/gadget.c | 6 ------
1 file changed, 6 deletions(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 47960787f572..bccb60fcdd70 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3068,8 +3068,6 @@ static int s3c_hsotg_udc_start(struct usb_gadget *gadget,
hsotg->gadget.dev.of_node = hsotg->dev->of_node;
hsotg->gadget.speed = USB_SPEED_UNKNOWN;

- clk_enable(hsotg->clk);
-
ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
hsotg->supplies);
if (ret) {
@@ -3139,8 +3137,6 @@ static int s3c_hsotg_udc_stop(struct usb_gadget *gadget)

regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);

- clk_disable(hsotg->clk);
-
mutex_unlock(&hsotg->init_mutex);

return 0;
@@ -3174,7 +3170,6 @@ static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
mutex_lock(&hsotg->init_mutex);
spin_lock_irqsave(&hsotg->lock, flags);
if (is_on) {
- clk_enable(hsotg->clk);
hsotg->enabled = 1;
s3c_hsotg_core_init_disconnected(hsotg, false);
s3c_hsotg_core_connect(hsotg);
@@ -3182,7 +3177,6 @@ static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
s3c_hsotg_core_disconnect(hsotg);
s3c_hsotg_disconnect(hsotg);
hsotg->enabled = 0;
- clk_disable(hsotg->clk);
}

hsotg->gadget.speed = USB_SPEED_UNKNOWN;
--
1.9.2