* [PATCH] usb: ohci-at91: use descriptor-based gpio APIs correctly
@ 2016-12-15 14:40 Peter Rosin
2016-12-16 8:53 ` [PATCH v2] " Peter Rosin
0 siblings, 1 reply; 2+ messages in thread
From: Peter Rosin @ 2016-12-15 14:40 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Rosin, Alan Stern, Greg Kroah-Hartman, linux-usb, Wenyou Yang
The devm_gpiod_get_optional function does not want the -gpio suffix.
The descriptor based APIs handle active high/low automatically.
The vbus gpios are output, request enable while getting the gpio.
Don't try to get any vbus gpios for ports outside num-ports.
WTF? Big sigh.
Fixes: 054d4b7b577d ("usb: ohci-at91: Use descriptor-based gpio APIs")
Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/usb/host/ohci-at91.c | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 1b2e09c32c6b..789fc342b553 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -43,7 +43,6 @@ struct at91_usbh_data {
struct gpio_desc *overcurrent_pin[AT91_MAX_USBH_PORTS];
u8 ports; /* number of ports on root hub */
u8 overcurrent_supported;
- u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS];
u8 overcurrent_status[AT91_MAX_USBH_PORTS];
u8 overcurrent_changed[AT91_MAX_USBH_PORTS];
};
@@ -268,8 +267,7 @@ static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int
if (!valid_port(port))
return;
- gpiod_set_value(pdata->vbus_pin[port],
- pdata->vbus_pin_active_low[port] ^ enable);
+ gpiod_set_value(pdata->vbus_pin[port], enable);
}
static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
@@ -277,8 +275,7 @@ static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
if (!valid_port(port))
return -EINVAL;
- return gpiod_get_value(pdata->vbus_pin[port]) ^
- pdata->vbus_pin_active_low[port];
+ return gpiod_get_value(pdata->vbus_pin[port]);
}
/*
@@ -535,18 +532,17 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
pdata->ports = ports;
at91_for_each_port(i) {
+ if (i >= pdata->ports)
+ break;
+
pdata->vbus_pin[i] = devm_gpiod_get_optional(&pdev->dev,
- "atmel,vbus-gpio",
- GPIOD_IN);
+ "atmel,vbus",
+ GPIOD_OUT_HIGH);
if (IS_ERR(pdata->vbus_pin[i])) {
err = PTR_ERR(pdata->vbus_pin[i]);
dev_err(&pdev->dev, "unable to claim gpio \"vbus\": %d\n", err);
continue;
}
-
- pdata->vbus_pin_active_low[i] = gpiod_get_value(pdata->vbus_pin[i]);
-
- ohci_at91_usb_set_power(pdata, i, 1);
}
at91_for_each_port(i) {
@@ -555,7 +551,7 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
pdata->overcurrent_pin[i] =
devm_gpiod_get_optional(&pdev->dev,
- "atmel,oc-gpio", GPIOD_IN);
+ "atmel,oc", GPIOD_IN);
if (IS_ERR(pdata->overcurrent_pin[i])) {
err = PTR_ERR(pdata->overcurrent_pin[i]);
dev_err(&pdev->dev, "unable to claim gpio \"overcurrent\": %d\n", err);
--
2.1.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH v2] usb: ohci-at91: use descriptor-based gpio APIs correctly
2016-12-15 14:40 [PATCH] usb: ohci-at91: use descriptor-based gpio APIs correctly Peter Rosin
@ 2016-12-16 8:53 ` Peter Rosin
0 siblings, 0 replies; 2+ messages in thread
From: Peter Rosin @ 2016-12-16 8:53 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Rosin, Alan Stern, Greg Kroah-Hartman, linux-usb, Wenyou Yang
The gpiod_get* function family does not want the -gpio suffix.
Use devm_gpiod_get_index_optional instead of devm_gpiod_get_optional.
The descriptor based APIs handle active high/low automatically.
The vbus-gpios are output, request enable while getting the gpio.
Don't try to get any vbus-gpios for ports outside num-ports.
WTF? Big sigh.
Fixes: 054d4b7b577d ("usb: ohci-at91: Use descriptor-based gpio APIs")
Signed-off-by: Peter Rosin <peda@axentia.se>
---
Hi!
Ok, I looked again and found one more problem with that garbage patch
(which did not affect me since I have just one port). You might want to
pick this up before v4.10-rc1, it's not nice to regress in the area of
over-current detection...
v1 -> v2 changes:
- use devm_gpiod_get_index_optional instead of devm_gpiod_get_optional
Cheers,
peda
drivers/usb/host/ohci-at91.c | 24 ++++++++++--------------
1 file changed, 10 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 1b2e09c32c6b..66ec407df2db 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -43,7 +43,6 @@ struct at91_usbh_data {
struct gpio_desc *overcurrent_pin[AT91_MAX_USBH_PORTS];
u8 ports; /* number of ports on root hub */
u8 overcurrent_supported;
- u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS];
u8 overcurrent_status[AT91_MAX_USBH_PORTS];
u8 overcurrent_changed[AT91_MAX_USBH_PORTS];
};
@@ -268,8 +267,7 @@ static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int
if (!valid_port(port))
return;
- gpiod_set_value(pdata->vbus_pin[port],
- pdata->vbus_pin_active_low[port] ^ enable);
+ gpiod_set_value(pdata->vbus_pin[port], enable);
}
static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
@@ -277,8 +275,7 @@ static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
if (!valid_port(port))
return -EINVAL;
- return gpiod_get_value(pdata->vbus_pin[port]) ^
- pdata->vbus_pin_active_low[port];
+ return gpiod_get_value(pdata->vbus_pin[port]);
}
/*
@@ -535,18 +532,17 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
pdata->ports = ports;
at91_for_each_port(i) {
- pdata->vbus_pin[i] = devm_gpiod_get_optional(&pdev->dev,
- "atmel,vbus-gpio",
- GPIOD_IN);
+ if (i >= pdata->ports)
+ break;
+
+ pdata->vbus_pin[i] =
+ devm_gpiod_get_index_optional(&pdev->dev, "atmel,vbus",
+ i, GPIOD_OUT_HIGH);
if (IS_ERR(pdata->vbus_pin[i])) {
err = PTR_ERR(pdata->vbus_pin[i]);
dev_err(&pdev->dev, "unable to claim gpio \"vbus\": %d\n", err);
continue;
}
-
- pdata->vbus_pin_active_low[i] = gpiod_get_value(pdata->vbus_pin[i]);
-
- ohci_at91_usb_set_power(pdata, i, 1);
}
at91_for_each_port(i) {
@@ -554,8 +550,8 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
break;
pdata->overcurrent_pin[i] =
- devm_gpiod_get_optional(&pdev->dev,
- "atmel,oc-gpio", GPIOD_IN);
+ devm_gpiod_get_index_optional(&pdev->dev, "atmel,oc",
+ i, GPIOD_IN);
if (IS_ERR(pdata->overcurrent_pin[i])) {
err = PTR_ERR(pdata->overcurrent_pin[i]);
dev_err(&pdev->dev, "unable to claim gpio \"overcurrent\": %d\n", err);
--
2.1.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
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