diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c index b3c83966be1823bff4ad54ea52d7529b5884b422..c9343f5d991880a963aa120a5762e02dfd36afa9 100644 --- a/drivers/clk/clk-divider.c +++ b/drivers/clk/clk-divider.c @@ -361,6 +361,11 @@ const struct clk_ops clk_divider_ops = { }; EXPORT_SYMBOL_GPL(clk_divider_ops); +const struct clk_ops clk_divider_ro_ops = { + .recalc_rate = clk_divider_recalc_rate, +}; +EXPORT_SYMBOL_GPL(clk_divider_ro_ops); + static struct clk *_register_divider(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 shift, u8 width, @@ -386,7 +391,10 @@ static struct clk *_register_divider(struct device *dev, const char *name, } init.name = name; - init.ops = &clk_divider_ops; + if (clk_divider_flags & CLK_DIVIDER_READ_ONLY) + init.ops = &clk_divider_ro_ops; + else + init.ops = &clk_divider_ops; init.flags = flags | CLK_IS_BASIC; init.parent_names = (parent_name ? &parent_name: NULL); init.num_parents = (parent_name ? 1 : 0); diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 40809431641e012557611c928fdd594f76bb5d7d..c7135dbbcd6523abf3b86e1699b6925afa4f3909 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -320,6 +320,8 @@ struct clk_div_table { * updated to indicate changing divider bits. * CLK_DIVIDER_ROUND_CLOSEST - Makes the best calculated divider to be rounded * to the closest integer instead of the up one. + * CLK_DIVIDER_READ_ONLY - The divider settings are preconfigured and should + * not be changed by the clock framework. */ struct clk_divider { struct clk_hw hw; @@ -336,8 +338,10 @@ struct clk_divider { #define CLK_DIVIDER_ALLOW_ZERO BIT(2) #define CLK_DIVIDER_HIWORD_MASK BIT(3) #define CLK_DIVIDER_ROUND_CLOSEST BIT(4) +#define CLK_DIVIDER_READ_ONLY BIT(5) extern const struct clk_ops clk_divider_ops; +extern const struct clk_ops clk_divider_ro_ops; struct clk *clk_register_divider(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 shift, u8 width,