* [PATCHv2 2/2] mfd: ssbi: Use devm_* and simplify code
2013-06-03 19:39 [PATCHv2 1/2] mfd: ssbi: Add MODULE_DEVICE_TABLE Stephen Boyd
@ 2013-06-03 19:39 ` Stephen Boyd
2013-06-04 7:33 ` Lee Jones
2013-06-17 23:51 ` [PATCHv2 1/2] mfd: ssbi: Add MODULE_DEVICE_TABLE Samuel Ortiz
1 sibling, 1 reply; 4+ messages in thread
From: Stephen Boyd @ 2013-06-03 19:39 UTC (permalink / raw)
To: Samuel Ortiz, Lee Jones; +Cc: linux-kernel, linux-arm-msm, David Brown
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>
---
Updated commit text since v1.
drivers/mfd/ssbi.c | 69 +++++++++---------------------------------------------
1 file changed, 11 insertions(+), 58 deletions(-)
diff --git a/drivers/mfd/ssbi.c b/drivers/mfd/ssbi.c
index e561d3b..102a2284 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");
--
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