gpio: janzttl: use devm function

This uses dem function for mem allocation

Signed-off-by: abdoulaye berthe <berthe.ab@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 8 insertions, 29 deletions

diff --git a/drivers/gpio/gpio-janz-ttl.c b/drivers/gpio/gpio-janz-ttl.c
index 255806bcbfe5..42852eaaf020 100644
--- a/drivers/gpio/gpio-janz-ttl.c
+++ b/drivers/gpio/gpio-janz-ttl.c
@@ -152,33 +152,21 @@ static int ttl_probe(struct platform_device *pdev)
         pdata = dev_get_platdata(&pdev->dev);
         if (!pdata) {
                 dev_err(dev, "no platform data\n");
-                ret = -ENXIO;
-                goto out_return;
+                return -ENXIO;
         }
 
-        mod = kzalloc(sizeof(*mod), GFP_KERNEL);
-        if (!mod) {
-                ret = -ENOMEM;
-                goto out_return;
-        }
+        mod = devm_kzalloc(dev, sizeof(*mod), GFP_KERNEL);
+        if (!mod)
+                return -ENOMEM;
 
         platform_set_drvdata(pdev, mod);
         spin_lock_init(&mod->lock);
 
         /* get access to the MODULbus registers for this module */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_err(dev, "MODULbus registers not found\n");
-                ret = -ENODEV;
-                goto out_free_mod;
-        }
-
-        mod->regs = ioremap(res->start, resource_size(res));
-        if (!mod->regs) {
-                dev_err(dev, "MODULbus registers not ioremap\n");
-                ret = -ENOMEM;
-                goto out_free_mod;
-        }
+        mod->regs = devm_ioremap_resource(dev, res);
+        if (IS_ERR(mod->regs))
+                return PTR_ERR(mod->regs);
 
         ttl_setup_device(mod);
 
@@ -197,17 +185,10 @@ static int ttl_probe(struct platform_device *pdev)
         ret = gpiochip_add(gpio);
         if (ret) {
                 dev_err(dev, "unable to add GPIO chip\n");
-                goto out_iounmap_regs;
+                return ret;
         }
 
         return 0;
-
-out_iounmap_regs:
-        iounmap(mod->regs);
-out_free_mod:
-        kfree(mod);
-out_return:
-        return ret;
 }
 
 static int ttl_remove(struct platform_device *pdev)
@@ -222,8 +203,6 @@ static int ttl_remove(struct platform_device *pdev)
                 return ret;
         }
 
-        iounmap(mod->regs);
-        kfree(mod);
         return 0;
 }