dm: imx: i2c: Use gpio_request() to request GPIOs

GPIOs should be requested before use. Without this, driver model will
not permit the GPIO to be used.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>

arch/arm/imx-common/i2c-mxv7.c

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 #include <common.h>
+#include <malloc.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/errno.h>
@@ -72,10 +73,27 @@ static void * const i2c_bases[] = {
 int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
 	      struct i2c_pads_info *p)
 {
+	char *name1, *name2;
 	int ret;
 
 	if (i2c_index >= ARRAY_SIZE(i2c_bases))
 		return -EINVAL;
+
+	name1 = malloc(9);
+	name2 = malloc(9);
+	if (!name1 || !name2)
+		return -ENOMEM;
+
+	sprintf(name1, "i2c_sda%d", i2c_index);
+	sprintf(name2, "i2c_scl%d", i2c_index);
+	ret = gpio_request(p->sda.gp, name1);
+	if (ret)
+		goto err_req1;
+
+	ret = gpio_request(p->scl.gp, name2);
+	if (ret)
+		goto err_req2;
+
 	/* Enable i2c clock */
 	ret = enable_i2c_clk(1, i2c_index);
 	if (ret)
@@ -93,5 +111,12 @@ int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
 
 err_idle:
 err_clk:
+	gpio_free(p->scl.gp);
+err_req2:
+	gpio_free(p->sda.gp);
+err_req1:
+	free(name1);
+	free(name2);
+
 	return ret;
 }