lkml.org 
[lkml]   [2015]   [Sep]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/4] usb: dwc2: remove non-functional clock gating
Date
During typical gadget operation, dwc2 clock was enabled 3 times: from
dwc2_gadget_init(), dwc2_hsotg_udc_start() and dwc2_hsotg_pullup(), and
then disabled in s3c_hsotg_pullup(), s3c_hsotg_udc_stop() and
dwc2_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 410ea6e..3f656d9 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3068,8 +3068,6 @@ static int dwc2_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 dwc2_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 dwc2_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;
dwc2_hsotg_core_init_disconnected(hsotg, false);
dwc2_hsotg_core_connect(hsotg);
@@ -3182,7 +3177,6 @@ static int dwc2_hsotg_pullup(struct usb_gadget *gadget, int is_on)
dwc2_hsotg_core_disconnect(hsotg);
dwc2_hsotg_disconnect(hsotg);
hsotg->enabled = 0;
- clk_disable(hsotg->clk);
}

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


\
 
 \ /
  Last update: 2015-09-21 12:41    [W:0.127 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site