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clk: hisilicon: hi3519: add driver remove path and fix some issues 

1. Add driver remove path.
2. Fix some issues.
   -Fix the ordering issue about clock provider being published.
   -Add error checking upon registering clocks.

Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Jiancheng Xue 2016-06-15 14:26:38 +08:00 committed by Stephen Boyd
parent fbf0410ed5
commit 224b3b262c
1 changed files with 101 additions and 17 deletions
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118
drivers/clk/hisilicon/clk-hi3519.c
View File

@ -38,6 +38,11 @@
#define HI3519_NR_CLKS 128
struct hi3519_crg_data {
struct hisi_clock_data *clk_data;
struct hisi_reset_controller *rstc;
};
static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
{ HI3519_FIXED_24M, "24m", NULL, 0, 24000000, },
{ HI3519_FIXED_50M, "50m", NULL, 0, 50000000, },
@ -80,33 +85,105 @@ static const struct hisi_gate_clock hi3519_gate_clks[] = {
CLK_SET_RATE_PARENT, 0xe4, 18, 0, },
};
static int hi3519_clk_probe(struct platform_device *pdev)
static struct hisi_clock_data *hi3519_clk_register(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct hisi_clock_data *clk_data;
struct hisi_reset_controller *rstc;
int ret;
rstc = hisi_reset_init(pdev);
if (!rstc)
return -ENOMEM;
clk_data = hisi_clk_alloc(pdev, HI3519_NR_CLKS);
if (!clk_data)
return ERR_PTR(-ENOMEM);
clk_data = hisi_clk_init(np, HI3519_NR_CLKS);
if (!clk_data) {
hisi_reset_exit(rstc);
return -ENODEV;
}
hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
ret = hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
ARRAY_SIZE(hi3519_fixed_rate_clks),
clk_data);
hisi_clk_register_mux(hi3519_mux_clks, ARRAY_SIZE(hi3519_mux_clks),
clk_data);
hisi_clk_register_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_gate_clks), clk_data);
if (ret)
return ERR_PTR(ret);
ret = hisi_clk_register_mux(hi3519_mux_clks,
ARRAY_SIZE(hi3519_mux_clks),
clk_data);
if (ret)
goto unregister_fixed_rate;
ret = hisi_clk_register_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_gate_clks),
clk_data);
if (ret)
goto unregister_mux;
ret = of_clk_add_provider(pdev->dev.of_node,
of_clk_src_onecell_get, &clk_data->clk_data);
if (ret)
goto unregister_gate;
return clk_data;
unregister_fixed_rate:
hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
ARRAY_SIZE(hi3519_fixed_rate_clks),
clk_data);
unregister_mux:
hisi_clk_unregister_mux(hi3519_mux_clks,
ARRAY_SIZE(hi3519_mux_clks),
clk_data);
unregister_gate:
hisi_clk_unregister_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_gate_clks),
clk_data);
return ERR_PTR(ret);
}
static void hi3519_clk_unregister(struct platform_device *pdev)
{
struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
of_clk_del_provider(pdev->dev.of_node);
hisi_clk_unregister_gate(hi3519_gate_clks,
ARRAY_SIZE(hi3519_mux_clks),
crg->clk_data);
hisi_clk_unregister_mux(hi3519_mux_clks,
ARRAY_SIZE(hi3519_mux_clks),
crg->clk_data);
hisi_clk_unregister_fixed_rate(hi3519_fixed_rate_clks,
ARRAY_SIZE(hi3519_fixed_rate_clks),
crg->clk_data);
}
static int hi3519_clk_probe(struct platform_device *pdev)
{
struct hi3519_crg_data *crg;
crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
if (!crg)
return -ENOMEM;
crg->rstc = hisi_reset_init(pdev);
if (!crg->rstc)
return -ENOMEM;
crg->clk_data = hi3519_clk_register(pdev);
if (IS_ERR(crg->clk_data)) {
hisi_reset_exit(crg->rstc);
return PTR_ERR(crg->clk_data);
}
platform_set_drvdata(pdev, crg);
return 0;
}
static int hi3519_clk_remove(struct platform_device *pdev)
{
struct hi3519_crg_data *crg = platform_get_drvdata(pdev);
hisi_reset_exit(crg->rstc);
hi3519_clk_unregister(pdev);
return 0;
}
static const struct of_device_id hi3519_clk_match_table[] = {
{ .compatible = "hisilicon,hi3519-crg" },
{ }
@ -115,6 +192,7 @@ MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
static struct platform_driver hi3519_clk_driver = {
.probe = hi3519_clk_probe,
.remove = hi3519_clk_remove,
.driver = {
.name = "hi3519-clk",
.of_match_table = hi3519_clk_match_table,
@ -127,5 +205,11 @@ static int __init hi3519_clk_init(void)
}
core_initcall(hi3519_clk_init);
static void __exit hi3519_clk_exit(void)
{
platform_driver_unregister(&hi3519_clk_driver);
}
module_exit(hi3519_clk_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");