[PATCH] clk: shmobile: fix setting paretn clock rate

[PATCH] clk: shmobile: fix setting paretn clock rate

[Ben Dooks]

If the driver needs to change a clock rate, then it must be propogated
through the MSTP clock to the parent clock (such as shdi0 -> sd0). Without
this we cannot up-rate default clocks which are really slow (such as the
mmcif1 which defaults to 12MHz where it could be running at 97MHz)

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 drivers/clk/shmobile/clk-mstp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c
index 7bfdcfc..9fc754b 100644
--- a/drivers/clk/shmobile/clk-mstp.c
+++ b/drivers/clk/shmobile/clk-mstp.c
@@ -139,7 +139,7 @@ cpg_mstp_clock_register(const char *name, const char *parent_name,
 
 	init.name = name;
 	init.ops = &cpg_mstp_clock_ops;
-	init.flags = CLK_IS_BASIC;
+	init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
 	init.parent_names = &parent_name;
 	init.num_parents = 1;
 
-- 
1.9.0

Re: [PATCH] clk: shmobile: fix setting paretn clock rate

[Mike Turquette]

Quoting Ben Dooks (2014-03-31 10:47:27)
> If the driver needs to change a clock rate, then it must be propogated
> through the MSTP clock to the parent clock (such as shdi0 -> sd0). Without
> this we cannot up-rate default clocks which are really slow (such as the
> mmcif1 which defaults to 12MHz where it could be running at 97MHz)
> 
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>

Taken into clk-next.

Regards,
Mike

> ---
>  drivers/clk/shmobile/clk-mstp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c
> index 7bfdcfc..9fc754b 100644
> --- a/drivers/clk/shmobile/clk-mstp.c
> +++ b/drivers/clk/shmobile/clk-mstp.c
> @@ -139,7 +139,7 @@ cpg_mstp_clock_register(const char *name, const char *parent_name,
>  
>         init.name = name;
>         init.ops = &cpg_mstp_clock_ops;
> -       init.flags = CLK_IS_BASIC;
> +       init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
>         init.parent_names = &parent_name;
>         init.num_parents = 1;
>  
> -- 
> 1.9.0
>