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Message-ID: <20180201093432.21919-2-ludovic.desroches@microchip.com>
Date: Thu, 1 Feb 2018 10:34:32 +0100
From: Ludovic Desroches <ludovic.desroches@...rochip.com>
To: <linux-usb@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
CC: <nicolas.ferre@...rochip.com>, <balbi@...nel.org>,
<alexandre.belloni@...e-electrons.com>,
<linux-kernel@...r.kernel.org>, <linus.walleij@...aro.org>,
Ludovic Desroches <ludovic.desroches@...rochip.com>
Subject: [PATCH 2/2] usb: gadget: udc: atmel: convert to use GPIO descriptors
Use GPIO descriptors instead of relying on the old method.
Include irq.h header since it is needed and was indirectly
included through of_gpio.h.
Signed-off-by: Ludovic Desroches <ludovic.desroches@...rochip.com>
---
drivers/usb/gadget/udc/atmel_usba_udc.c | 51 ++++++++++++++-------------------
drivers/usb/gadget/udc/atmel_usba_udc.h | 4 ++-
2 files changed, 25 insertions(+), 30 deletions(-)
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index dc2604ec38f8..ddd49281b427 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -23,7 +23,8 @@
#include <linux/usb/atmel_usba_udc.h>
#include <linux/delay.h>
#include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/irq.h>
+#include <linux/gpio/consumer.h>
#include "atmel_usba_udc.h"
#define USBA_VBUS_IRQFLAGS (IRQF_ONESHOT \
@@ -415,8 +416,8 @@ static inline void usba_int_enb_set(struct usba_udc *udc, u32 val)
static int vbus_is_present(struct usba_udc *udc)
{
- if (gpio_is_valid(udc->vbus_pin))
- return gpio_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
+ if (udc->vbus_pin)
+ return gpiod_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
/* No Vbus detection: Assume always present */
return 1;
@@ -1975,8 +1976,8 @@ static int atmel_usba_start(struct usb_gadget *gadget,
mutex_lock(&udc->vbus_mutex);
- if (gpio_is_valid(udc->vbus_pin))
- enable_irq(gpio_to_irq(udc->vbus_pin));
+ if (udc->vbus_pin)
+ enable_irq(gpiod_to_irq(udc->vbus_pin));
/* If Vbus is present, enable the controller and wait for reset */
udc->vbus_prev = vbus_is_present(udc);
@@ -1990,8 +1991,8 @@ static int atmel_usba_start(struct usb_gadget *gadget,
return 0;
err:
- if (gpio_is_valid(udc->vbus_pin))
- disable_irq(gpio_to_irq(udc->vbus_pin));
+ if (udc->vbus_pin)
+ disable_irq(gpiod_to_irq(udc->vbus_pin));
mutex_unlock(&udc->vbus_mutex);
@@ -2006,8 +2007,8 @@ static int atmel_usba_stop(struct usb_gadget *gadget)
{
struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
- if (gpio_is_valid(udc->vbus_pin))
- disable_irq(gpio_to_irq(udc->vbus_pin));
+ if (udc->vbus_pin)
+ disable_irq(gpiod_to_irq(udc->vbus_pin));
if (fifo_mode == 0)
udc->configured_ep = 1;
@@ -2054,7 +2055,6 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
{
u32 val;
const char *name;
- enum of_gpio_flags flags;
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *match;
struct device_node *pp;
@@ -2074,9 +2074,9 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
udc->num_ep = 0;
- udc->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0,
- &flags);
- udc->vbus_pin_inverted = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
+ udc->vbus_pin = devm_gpiod_get_optional(&pdev->dev, "atmel,vbus",
+ GPIOD_IN);
+ udc->vbus_pin_inverted = gpiod_is_active_low(udc->vbus_pin);
if (fifo_mode == 0) {
pp = NULL;
@@ -2239,7 +2239,6 @@ static int usba_udc_probe(struct platform_device *pdev)
udc->pdev = pdev;
udc->pclk = pclk;
udc->hclk = hclk;
- udc->vbus_pin = -ENODEV;
ret = -ENOMEM;
udc->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
@@ -2285,24 +2284,18 @@ static int usba_udc_probe(struct platform_device *pdev)
}
udc->irq = irq;
- if (gpio_is_valid(udc->vbus_pin)) {
- if (!devm_gpio_request(&pdev->dev, udc->vbus_pin, "atmel_usba_udc")) {
- irq_set_status_flags(gpio_to_irq(udc->vbus_pin),
- IRQ_NOAUTOEN);
- ret = devm_request_threaded_irq(&pdev->dev,
- gpio_to_irq(udc->vbus_pin), NULL,
+ if (udc->vbus_pin) {
+ irq_set_status_flags(gpiod_to_irq(udc->vbus_pin), IRQ_NOAUTOEN);
+ ret = devm_request_threaded_irq(&pdev->dev,
+ gpiod_to_irq(udc->vbus_pin), NULL,
usba_vbus_irq_thread, USBA_VBUS_IRQFLAGS,
"atmel_usba_udc", udc);
if (ret) {
- udc->vbus_pin = -ENODEV;
+ udc->vbus_pin = NULL;
dev_warn(&udc->pdev->dev,
"failed to request vbus irq; "
"assuming always on\n");
}
- } else {
- /* gpio_request fail so use -EINVAL for gpio_is_valid */
- udc->vbus_pin = -EINVAL;
- }
}
ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
@@ -2354,9 +2347,9 @@ static int usba_udc_suspend(struct device *dev)
* Device may wake up. We stay clocked if we failed
* to request vbus irq, assuming always on.
*/
- if (gpio_is_valid(udc->vbus_pin)) {
+ if (udc->vbus_pin) {
usba_stop(udc);
- enable_irq_wake(gpio_to_irq(udc->vbus_pin));
+ enable_irq_wake(gpiod_to_irq(udc->vbus_pin));
}
out:
@@ -2372,8 +2365,8 @@ static int usba_udc_resume(struct device *dev)
if (!udc->driver)
return 0;
- if (device_may_wakeup(dev) && gpio_is_valid(udc->vbus_pin))
- disable_irq_wake(gpio_to_irq(udc->vbus_pin));
+ if (device_may_wakeup(dev) && udc->vbus_pin)
+ disable_irq_wake(gpiod_to_irq(udc->vbus_pin));
/* If Vbus is present, enable the controller and wait for reset */
mutex_lock(&udc->vbus_mutex);
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index 860a00a6fdd0..969ce8f3c3e2 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -7,6 +7,8 @@
#ifndef __LINUX_USB_GADGET_USBA_UDC_H__
#define __LINUX_USB_GADGET_USBA_UDC_H__
+#include <linux/gpio/consumer.h>
+
/* USB register offsets */
#define USBA_CTRL 0x0000
#define USBA_FNUM 0x0004
@@ -323,7 +325,7 @@ struct usba_udc {
struct platform_device *pdev;
const struct usba_udc_errata *errata;
int irq;
- int vbus_pin;
+ struct gpio_desc *vbus_pin;
int vbus_pin_inverted;
int num_ep;
int configured_ep;
--
2.12.2
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