[PATCH v2] soc: fsl: qe: Avoid using gpio_to_desc()

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

We want to get rid of the old GPIO numberspace, so instead of
calling gpio_to_desc() we get the gpio descriptor for the requested
line from the device tree directly without passing through the
GPIO numberspace, and then we get the gpiochip from the descriptor.

Cc: Bartosz Golaszewski <brgl@xxxxxxxx>
Cc: linux-gpio@xxxxxxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v1->v2:
- Add back the <linux/of_gpio.h> include: we are using the
  mm_of_gpio_chip, which should be fixed, but not now.
---
 drivers/soc/fsl/qe/gpio.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/soc/fsl/qe/gpio.c b/drivers/soc/fsl/qe/gpio.c
index 99f7de43c3c6..68d48430ab33 100644
--- a/drivers/soc/fsl/qe/gpio.c
+++ b/drivers/soc/fsl/qe/gpio.c
@@ -14,9 +14,8 @@
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/gpio/driver.h>
-/* FIXME: needed for gpio_to_chip() get rid of this */
-#include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <soc/fsl/qe/qe.h>
@@ -161,6 +160,7 @@ struct qe_pin *qe_pin_request(struct device_node *np, int index)
 	struct qe_pin *qe_pin;
 	struct gpio_chip *gc;
 	struct qe_gpio_chip *qe_gc;
+	struct gpio_desc *gpiod;
 	int err;
 	unsigned long flags;
 
@@ -170,14 +170,21 @@ struct qe_pin *qe_pin_request(struct device_node *np, int index)
 		return ERR_PTR(-ENOMEM);
 	}
 
-	err = of_get_gpio(np, index);
-	if (err < 0)
+	gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), NULL, index, GPIOD_ASIS, "qe");
+	if (IS_ERR(gpiod)) {
+		err = PTR_ERR(gpiod);
 		goto err0;
-	gc = gpio_to_chip(err);
+	}
+	if (!gpiod) {
+		err = -EINVAL;
+		goto err0;
+	}
+	gc = gpiod_to_chip(gpiod);
 	if (WARN_ON(!gc)) {
 		err = -ENODEV;
 		goto err0;
 	}
+	gpiod_put(gpiod);
 
 	if (!of_device_is_compatible(gc->of_node, "fsl,mpc8323-qe-pario-bank")) {
 		pr_debug("%s: tried to get a non-qe pin\n", __func__);
-- 
2.34.1