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authorStephen Boyd <sboyd@codeaurora.org>2013-06-03 12:39:44 -0700
committerSamuel Ortiz <sameo@linux.intel.com>2013-06-18 09:41:15 +0200
commite578438820cdca91cb5eab477ec062236433ce5f (patch)
tree79e0cf11bb20c6a90874463eea284cdd3f85e294 /drivers/mfd
parent6378c1e511d97218f33936f47888095023c9ffaf (diff)
downloadlinux-e578438820cdca91cb5eab477ec062236433ce5f.tar.bz2
mfd: ssbi: Use devm_* and simplify code
Use devm_ioremap_resource and devm_kzalloc to simplify error paths and reduce lines of code. Also use dev_err() to keep consistency and drop the .remove function because the devm functions take care of what it's doing besides the now obsolete platform_set_drvdata() which we can just drop. Finally, use module_platform_driver() to save some more lines. Cc: David Brown <davidb@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/ssbi.c69
1 files changed, 11 insertions, 58 deletions
diff --git a/drivers/mfd/ssbi.c b/drivers/mfd/ssbi.c
index e561d3be54a5..102a22844297 100644
--- a/drivers/mfd/ssbi.c
+++ b/drivers/mfd/ssbi.c
@@ -268,35 +268,23 @@ static int ssbi_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct resource *mem_res;
struct ssbi *ssbi;
- int ret = 0;
const char *type;
- ssbi = kzalloc(sizeof(struct ssbi), GFP_KERNEL);
- if (!ssbi) {
- pr_err("can not allocate ssbi_data\n");
+ ssbi = devm_kzalloc(&pdev->dev, sizeof(*ssbi), GFP_KERNEL);
+ if (!ssbi)
return -ENOMEM;
- }
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem_res) {
- pr_err("missing mem resource\n");
- ret = -EINVAL;
- goto err_get_mem_res;
- }
+ ssbi->base = devm_ioremap_resource(&pdev->dev, mem_res);
+ if (IS_ERR(ssbi->base))
+ return PTR_ERR(ssbi->base);
- ssbi->base = ioremap(mem_res->start, resource_size(mem_res));
- if (!ssbi->base) {
- pr_err("ioremap of 0x%p failed\n", (void *)mem_res->start);
- ret = -EINVAL;
- goto err_ioremap;
- }
platform_set_drvdata(pdev, ssbi);
type = of_get_property(np, "qcom,controller-type", NULL);
if (type == NULL) {
- pr_err("Missing qcom,controller-type property\n");
- ret = -EINVAL;
- goto err_ssbi_controller;
+ dev_err(&pdev->dev, "Missing qcom,controller-type property\n");
+ return -EINVAL;
}
dev_info(&pdev->dev, "SSBI controller type: '%s'\n", type);
if (strcmp(type, "ssbi") == 0)
@@ -306,9 +294,8 @@ static int ssbi_probe(struct platform_device *pdev)
else if (strcmp(type, "pmic-arbiter") == 0)
ssbi->controller_type = MSM_SBI_CTRL_PMIC_ARBITER;
else {
- pr_err("Unknown qcom,controller-type\n");
- ret = -EINVAL;
- goto err_ssbi_controller;
+ dev_err(&pdev->dev, "Unknown qcom,controller-type\n");
+ return -EINVAL;
}
if (ssbi->controller_type == MSM_SBI_CTRL_PMIC_ARBITER) {
@@ -321,29 +308,7 @@ static int ssbi_probe(struct platform_device *pdev)
spin_lock_init(&ssbi->lock);
- ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
- if (ret)
- goto err_ssbi_controller;
-
- return 0;
-
-err_ssbi_controller:
- platform_set_drvdata(pdev, NULL);
- iounmap(ssbi->base);
-err_ioremap:
-err_get_mem_res:
- kfree(ssbi);
- return ret;
-}
-
-static int ssbi_remove(struct platform_device *pdev)
-{
- struct ssbi *ssbi = platform_get_drvdata(pdev);
-
- platform_set_drvdata(pdev, NULL);
- iounmap(ssbi->base);
- kfree(ssbi);
- return 0;
+ return of_platform_populate(np, NULL, NULL, &pdev->dev);
}
static struct of_device_id ssbi_match_table[] = {
@@ -354,25 +319,13 @@ MODULE_DEVICE_TABLE(of, ssbi_match_table);
static struct platform_driver ssbi_driver = {
.probe = ssbi_probe,
- .remove = ssbi_remove,
.driver = {
.name = "ssbi",
.owner = THIS_MODULE,
.of_match_table = ssbi_match_table,
},
};
-
-static int __init ssbi_init(void)
-{
- return platform_driver_register(&ssbi_driver);
-}
-module_init(ssbi_init);
-
-static void __exit ssbi_exit(void)
-{
- platform_driver_unregister(&ssbi_driver);
-}
-module_exit(ssbi_exit)
+module_platform_driver(ssbi_driver);
MODULE_LICENSE("GPL v2");
MODULE_VERSION("1.0");