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clk: hisilicon: add hisi_clk_alloc function.

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Before, there was an ordering issue that the clock provider
had been published in hisi_clk_init before it could provide
valid clocks to consumers. hisi_clk_alloc is just used to
allocate memory space for struct hisi_clock_data. It makes
it possible to publish the provider after the clocks are ready.

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 14:26:35 +08:00 committed by Stephen Boyd
parent 97b7129cd2
commit 322269163a
2 changed files with 32 additions and 0 deletions
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29
drivers/clk/hisilicon/clk.c
View File

@ -37,6 +37,35 @@
static DEFINE_SPINLOCK(hisi_clk_lock);
struct hisi_clock_data *hisi_clk_alloc(struct platform_device *pdev,
int nr_clks)
{
struct hisi_clock_data *clk_data;
struct resource *res;
struct clk **clk_table;
clk_data = devm_kmalloc(&pdev->dev, sizeof(*clk_data), GFP_KERNEL);
if (!clk_data)
return NULL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
clk_data->base = devm_ioremap(&pdev->dev,
res->start, resource_size(res));
if (!clk_data->base)
return NULL;
clk_table = devm_kmalloc(&pdev->dev, sizeof(struct clk *) * nr_clks,
GFP_KERNEL);
if (!clk_table)
return NULL;
clk_data->clk_data.clks = clk_table;
clk_data->clk_data.clk_num = nr_clks;
return clk_data;
}
EXPORT_SYMBOL_GPL(hisi_clk_alloc);
struct hisi_clock_data *hisi_clk_init(struct device_node *np,
int nr_clks)
{

3
drivers/clk/hisilicon/clk.h
View File

@ -30,6 +30,8 @@
#include <linux/io.h>
#include <linux/spinlock.h>
struct platform_device;
struct hisi_clock_data {
struct clk_onecell_data clk_data;
void __iomem *base;
@ -110,6 +112,7 @@ struct clk *hi6220_register_clkdiv(struct device *dev, const char *name,
const char *parent_name, unsigned long flags, void __iomem *reg,
u8 shift, u8 width, u32 mask_bit, spinlock_t *lock);
struct hisi_clock_data *hisi_clk_alloc(struct platform_device *, int);
struct hisi_clock_data *hisi_clk_init(struct device_node *, int);
void hisi_clk_register_fixed_rate(const struct hisi_fixed_rate_clock *,
int, struct hisi_clock_data *);