[PATCH 2/5] clk: hisilicon: add hisi_clk_alloc function.

Jiancheng Xue
2016-05-10T09:32:28Z

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>
---
drivers/clk/hisilicon/clk.c | 29 +++++++++++++++++++++++++++++
drivers/clk/hisilicon/clk.h | 3 +++
2 files changed, 32 insertions(+)

diff --git a/drivers/clk/hisilicon/clk.c b/drivers/clk/hisilicon/clk.c
index 9b15adb..78675d1 100644
--- a/drivers/clk/hisilicon/clk.c
+++ b/drivers/clk/hisilicon/clk.c
@@ -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)
{
diff --git a/drivers/clk/hisilicon/clk.h b/drivers/clk/hisilicon/clk.h
index 20d64af..5fc644f 100644
--- a/drivers/clk/hisilicon/clk.h
+++ b/drivers/clk/hisilicon/clk.h
@@ -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 *);
--
1.9.1