diff options
| author | Dong Aisheng <aisheng.dong@nxp.com> | 2017-05-13 16:03:19 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:30:33 +0800 |
| commit | 33efbe6a9e3aae7bcad3592b927606bf6db18b6c (patch) | |
| tree | 11cf43de7c1510043a67971324c6f317d7e3b415 /include/linux/clk-provider.h | |
| parent | 9857e19ab9319a626db279db8c489fed7e86127a (diff) | |
MLK-17491-35 clk: fractional-divider: add CLK_FRAC_DIVIDER_ZERO_BASED flag support
Adding CLK_FRAC_DIVIDER_ZERO_BASED flag to indicate the numerator and
denominator value in register are start from 0.
This can be used to support frac dividers like below:
Divider output clock = Divider input clock x [(frac +1) / (div +1)]
where frac/div in register is:
000b - Divide by 1.
001b - Divide by 2.
010b - Divide by 3.
Cc: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Bai Ping <ping.bai@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Diffstat (limited to 'include/linux/clk-provider.h')
| -rw-r--r-- | include/linux/clk-provider.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 4db531ba3597..83030fcc554b 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -565,6 +565,12 @@ void clk_hw_unregister_fixed_factor(struct clk_hw *hw); * @lock: register lock * * Clock with adjustable fractional divider affecting its output frequency. + * + * Flags: + * CLK_FRAC_DIVIDER_ZERO_BASED - by default the numerator and denominator + * is the value read from the register. If CLK_FRAC_DIVIDER_ZERO_BASED + * is set then the numerator and denominator are both the value read + * plus one. */ struct clk_fractional_divider { struct clk_hw hw; @@ -584,6 +590,8 @@ struct clk_fractional_divider { #define to_clk_fd(_hw) container_of(_hw, struct clk_fractional_divider, hw) +#define CLK_FRAC_DIVIDER_ZERO_BASED BIT(0) + extern const struct clk_ops clk_fractional_divider_ops; struct clk *clk_register_fractional_divider(struct device *dev, const char *name, const char *parent_name, unsigned long flags, |