On 10/7/2014 7:25 AM, Yoshihiro Shimoda wrote:
Signed-off-by: Yoshihiro Shimoda <[email protected]>
---
arch/arm/boot/dts/r8a7790-lager.dts | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/boot/dts/r8a7790-lager.dts
b/arch/arm/boot/dts/r8a7790-lager.dts
index 1698591..4badd0a 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -445,3 +445,8 @@
};
};
};
+
+&hsusb {
+ status = "okay";
+ renesas,enable-gpio = <&gpio5 18 GPIO_ACTIVE_LOW>;
It's certainly active-high.
Since the current code has the following, we have to set the active_low...
However, the code is unreadable, I think. So, I will modify the code.
/* check GPIO determining if USB function should be enabled */
if (priv->dparam.enable_gpio) {
gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
ret = !gpio_get_value(priv->dparam.enable_gpio);
gpio_free(priv->dparam.enable_gpio);
if (ret) {
dev_warn(&pdev->dev,
"USB function not selected (GPIO %d)\n",
priv->dparam.enable_gpio);
ret = -ENOTSUPP;
goto probe_end_mod_exit;
}
}
I am confusing about the gpio_get_value()...
In case of ARM, gpio_get_value() will call gpiod_get_raw_value() finally.
gpio_get_value() in arch/arm/include/asm/gpio.h
--> __gpio_get_value() in include/asm-generic/gpio.h
--> gpiod_get_raw_value() in drivers/gpio/gpiolib.c
The gpiod_get_raw_value() doesn't care of the GPIO_ACTIVE_{HIGH,LOW}.
So, should I add gpiod_is_active_low() or someting in the renesas_usbhs driver?
Why do you still think it's active-low?!
Or, Do I misunderstand something?
Look at the above code again.
Best regards,
Yoshihiro Shimoda
WBR, Sergei
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