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usb: gadget: udc: lpc32xx: rework interrupt handling 

There is no actual need to do the enable/disable_irq dance. Instead enable
the interrupts on the phy only when necessary.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Alexandre Belloni 2019-04-09 14:09:08 +02:00 committed by Felipe Balbi
parent 2a60f5eafa
commit c67d4262f6
1 changed files with 10 additions and 19 deletions
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29
drivers/usb/gadget/udc/lpc32xx_udc.c
View File

@ -617,17 +617,13 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
OTG1_VBUS_DISCHRG);
/* Clear and enable VBUS high edge interrupt */
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_FALLING, INT_SESS_VLD | INT_VBUS_VLD);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_RISING, INT_SESS_VLD | INT_VBUS_VLD);
dev_info(udc->dev, "ISP1301 Vendor ID : 0x%04x\n", vendor);
dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n", product);
@ -2887,9 +2883,6 @@ static void vbus_work(struct lpc32xx_udc *udc)
lpc32xx_vbus_session(&udc->gadget, udc->vbus);
}
}
/* Re-enable after completion */
enable_irq(udc->udp_irq[IRQ_USB_ATX]);
}
static irqreturn_t lpc32xx_usb_vbus_irq(int irq, void *_udc)
@ -2905,7 +2898,6 @@ static int lpc32xx_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
struct lpc32xx_udc *udc = to_udc(gadget);
int i;
if (!driver || driver->max_speed < USB_SPEED_FULL || !driver->setup) {
dev_err(udc->dev, "bad parameter.\n");
@ -2927,20 +2919,23 @@ static int lpc32xx_start(struct usb_gadget *gadget,
udc->last_vbus = udc->vbus = 0;
vbus_work(udc);
/* Do not re-enable ATX IRQ (3) */
for (i = IRQ_USB_LP; i < IRQ_USB_ATX; i++)
enable_irq(udc->udp_irq[i]);
/* enable interrupts */
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_FALLING, INT_SESS_VLD | INT_VBUS_VLD);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_RISING, INT_SESS_VLD | INT_VBUS_VLD);
return 0;
}
static int lpc32xx_stop(struct usb_gadget *gadget)
{
int i;
struct lpc32xx_udc *udc = to_udc(gadget);
for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
disable_irq(udc->udp_irq[i]);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
if (udc->clocked) {
spin_lock(&udc->lock);
@ -3172,10 +3167,6 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
init_waitqueue_head(&udc->ep_disable_wait_queue);
atomic_set(&udc->enabled_ep_cnt, 0);
/* Keep all IRQs disabled until GadgetFS starts up */
for (i = IRQ_USB_LP; i <= IRQ_USB_ATX; i++)
disable_irq(udc->udp_irq[i]);
retval = usb_add_gadget_udc(dev, &udc->gadget);
if (retval < 0)
goto add_gadget_fail;