usb: phy: generic: migrate to gpio_desc

Change internal gpio handling from integer gpios into gpio
descriptors. This change only addresses the internal API and
device-tree/ACPI, while the legacy platform data remains integer space
based.

This change is only build compile tested, and very prone to error. I
leave this comment for now in the commit message so that this patch gets
some testing as I'm pretty sure it's buggy.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c
index f1b719b..d53928f 100644 (file)
--- a/drivers/usb/phy/phy-generic.c
+++ b/drivers/usb/phy/phy-generic.c
@@ -59,16 +59,8 @@ static int nop_set_suspend(struct usb_phy *x, int suspend)
 
 static void nop_reset_set(struct usb_phy_generic *nop, int asserted)
 {
-       int value;
-
-       if (!gpio_is_valid(nop->gpio_reset))
-               return;
-
-       value = asserted;
-       if (nop->reset_active_low)
-               value = !value;
-
-       gpio_set_value_cansleep(nop->gpio_reset, value);
+       if (nop->gpiod_reset)
+               gpiod_set_value(nop->gpiod_reset, asserted);
 
        if (!asserted)
                usleep_range(10000, 20000);
@@ -143,35 +135,38 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
                struct usb_phy_generic_platform_data *pdata)
 {
        enum usb_phy_type type = USB_PHY_TYPE_USB2;
-       int err;
+       int err = 0;
 
        u32 clk_rate = 0;
        bool needs_vcc = false;
 
-       nop->reset_active_low = true;   /* default behaviour */
-
        if (dev->of_node) {
                struct device_node *node = dev->of_node;
-               enum of_gpio_flags flags = 0;
 
                if (of_property_read_u32(node, "clock-frequency", &clk_rate))
                        clk_rate = 0;
 
                needs_vcc = of_property_read_bool(node, "vcc-supply");
-               nop->gpio_reset = of_get_named_gpio_flags(node, "reset-gpios",
-                                                               0, &flags);
-               if (nop->gpio_reset == -EPROBE_DEFER)
-                       return -EPROBE_DEFER;
-
-               nop->reset_active_low = flags & OF_GPIO_ACTIVE_LOW;
-
+               nop->gpiod_reset = devm_gpiod_get(dev, "reset-gpios");
+               err = PTR_ERR(nop->gpiod_reset);
        } else if (pdata) {
                type = pdata->type;
                clk_rate = pdata->clk_rate;
                needs_vcc = pdata->needs_vcc;
-               nop->gpio_reset = pdata->gpio_reset;
-       } else {
-               nop->gpio_reset = -1;
+               if (gpio_is_valid(gpio->gpio_reset)) {
+                       err = devm_gpio_request_one(dev, pdata->gpio_reset, 0,
+                                                   dev_name(dev));
+                       if (!err)
+                               nop->gpiod_reset =
+                                       gpio_to_desc(pdata->gpio_reset);
+               }
+       }
+
+       if (err == -EPROBE_DEFER)
+               return -EPROBE_DEFER;
+       if (err) {
+               dev_err(dev, "Error requesting RESET GPIO\n");
+               return err;
        }
 
        nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
@@ -201,24 +196,6 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
                        return -EPROBE_DEFER;
        }
 
-       if (gpio_is_valid(nop->gpio_reset)) {
-               unsigned long gpio_flags;
-
-               /* Assert RESET */
-               if (nop->reset_active_low)
-                       gpio_flags = GPIOF_OUT_INIT_LOW;
-               else
-                       gpio_flags = GPIOF_OUT_INIT_HIGH;
-
-               err = devm_gpio_request_one(dev, nop->gpio_reset,
-                                               gpio_flags, dev_name(dev));
-               if (err) {
-                       dev_err(dev, "Error requesting RESET GPIO %d\n",
-                                       nop->gpio_reset);
-                       return err;
-               }
-       }
-
        nop->dev                = dev;
        nop->phy.dev            = nop->dev;
        nop->phy.label          = "nop-xceiv";

diff --git a/drivers/usb/phy/phy-generic.h b/drivers/usb/phy/phy-generic.h
index d8feacc..09924fd 100644 (file)
--- a/drivers/usb/phy/phy-generic.h
+++ b/drivers/usb/phy/phy-generic.h
@@ -2,14 +2,14 @@
 #define _PHY_GENERIC_H_
 
 #include <linux/usb/usb_phy_generic.h>
+#include <linux/gpio/consumer.h>
 
 struct usb_phy_generic {
        struct usb_phy phy;
        struct device *dev;
        struct clk *clk;
        struct regulator *vcc;
-       int gpio_reset;
-       bool reset_active_low;
+       struct gpio_desc *gpiod_reset;
 };
 
 int usb_gen_phy_init(struct usb_phy *phy);