[PATCH v2 2/5] clk: hisilicon: add hisi_clk_alloc function.
From: Jiancheng Xue <hidden>
Date: 2016-06-15 06:37:41
Also in:
lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
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 <redacted> --- 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 *);
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1.9.1