Merge branch 'master' of git://git.denx.de/u-boot-usb

[u-boot] / arch / arm / imx-common / i2c-mxv7.c

diff --git a/arch/arm/imx-common/i2c-mxv7.c b/arch/arm/imx-common/i2c-mxv7.c
index da2b26f43f484b487298c537b0117a99fbcff495..34f53872e89b3d0674f9cff2227a8d10ea510c45 100644 (file)
--- a/arch/arm/imx-common/i2c-mxv7.c
+++ b/arch/arm/imx-common/i2c-mxv7.c
@@ -1,25 +1,10 @@
 /*
  * Copyright (C) 2012 Boundary Devices Inc.
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * 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>
@@ -85,15 +70,53 @@ static void * const i2c_bases[] = {
 };
 
 /* i2c_index can be from 0 - 2 */
-void setup_i2c(unsigned i2c_index, int speed, int slave_addr,
-               struct i2c_pads_info *p)
+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;
+               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 */
-       enable_i2c_clk(1, i2c_index);
+       ret = enable_i2c_clk(1, i2c_index);
+       if (ret)
+               goto err_clk;
+
        /* Make sure bus is idle */
-       force_idle_bus(p);
+       ret = force_idle_bus(p);
+       if (ret)
+               goto err_idle;
+
        bus_i2c_init(i2c_bases[i2c_index], speed, slave_addr,
                        force_idle_bus, p);
+
+       return 0;
+
+err_idle:
+err_clk:
+       gpio_free(p->scl.gp);
+err_req2:
+       gpio_free(p->sda.gp);
+err_req1:
+       free(name1);
+       free(name2);
+
+       return ret;
 }