> Subject: [PATCH v4 13/13] dm: clk: Extend clk_get_parent_rate() to support
> CLK_GET_RATE_NOCACHE flag
>
> If the CLK_GET_RATE_NOCACHE flag is set - the clk_get_parent_rate()
> provides recalculated clock value without considering the cache setting.
>
> This may be necessary for some clocks tightly coupled with power domains
> (i.e. imx8), and prevents from reading invalid cached values.
>
> Signed-off-by: Lukasz Majewski <lu...@denx.de>
>
> ---
>
> Changes in v4:
> - New patch
>
> Changes in v3: None
>
> drivers/clk/clk-uclass.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index
> 6f054396e3..3dcfae85c4 100644
> --- a/drivers/clk/clk-uclass.c
> +++ b/drivers/clk/clk-uclass.c
> @@ -13,6 +13,7 @@
> #include <dm/read.h>
> #include <dt-structs.h>
> #include <errno.h>
> +#include <linux/clk-provider.h>
>
> static inline const struct clk_ops *clk_dev_ops(struct udevice *dev) { @@
> -409,8 +410,8 @@ ulong clk_get_parent_rate(struct clk *clk)
> if (!ops->get_rate)
> return -ENOSYS;
>
> - /* Read the 'rate' if not already set */
> - if (!pclk->rate)
> + /* Read the 'rate' if not already set or if proper flag set*/
> + if (!pclk->rate || pclk->flags & CLK_GET_RATE_NOCACHE)
> pclk->rate = clk_get_rate(pclk);
Reviewed-by: Peng Fan <peng....@nxp.com>
>
> return pclk->rate;
> --
> 2.11.0
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