On 3/28/24 09:56, Krzysztof Kozlowski wrote:
> On 26/03/2024 18:28, Tudor Ambarus wrote:
>> All samsung MUX clocks that are defined with MUX() set the
>> CLK_SET_RATE_NO_REPARENT flag in __MUX(), which prevents MUXes to be
>> reparented during clk_set_rate().
>>
>> Introduce nMUX() for MUX clocks that can be reparented. One user of
>> nMUX() will be GS101. GS101 defines MUX clocks that are dedicated for
>> each instance of an IP (see MUX USI). The reparenting of these MUX clocks
>> will not affect other instances of the same IP or different IPs
>> altogether.
>>
>> Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxx>
>> ---
>> drivers/clk/samsung/clk.h | 20 ++++++++++++++++++++
>> 1 file changed, 20 insertions(+)
>>
>> diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
>> index a70bd7cce39f..01f58b7686db 100644
>> --- a/drivers/clk/samsung/clk.h
>> +++ b/drivers/clk/samsung/clk.h
>> @@ -146,6 +146,26 @@ struct samsung_mux_clock {
>> #define MUX_F(_id, cname, pnames, o, s, w, f, mf) \
>> __MUX(_id, cname, pnames, o, s, w, f, mf)
>>
>> +/* Used by MUX clocks where reparenting is allowed. */
>
> ...where reparenting on clock rate change is allowed
>
> Because otherwise this suggest muxes cannot change :)
Ok.
>
> No need to resend just for this, I can fix it while applying. Still
> waiting for some review, till EOD.
>
Andre' suggested I can avoid defining __nMUX() by removing the
CLK_SET_RATE_NO_REPARENT flag from __MUX() and instead add the flag in
the MUX() and MUX_F() definitions. Something like this:
diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
index a70bd7cce39f..fb06caa71f0a 100644
--- a/drivers/clk/samsung/clk.h
+++ b/drivers/clk/samsung/clk.h
@@ -133,7 +133,7 @@ struct samsung_mux_clock {
.name = cname, \
.parent_names = pnames, \
.num_parents = ARRAY_SIZE(pnames), \
- .flags = (f) | CLK_SET_RATE_NO_REPARENT, \
+ .flags = f, \
.offset = o, \
.shift = s, \
.width = w, \
@@ -141,9 +141,16 @@ struct samsung_mux_clock {
}
#define MUX(_id, cname, pnames, o, s, w) \
- __MUX(_id, cname, pnames, o, s, w, 0, 0)
+ __MUX(_id, cname, pnames, o, s, w, CLK_SET_RATE_NO_REPARENT, 0)
#define MUX_F(_id, cname, pnames, o, s, w, f, mf) \
+ __MUX(_id, cname, pnames, o, s, w, (f) |
CLK_SET_RATE_NO_REPARENT, mf)
+
+/* Used by MUX clocks where reparenting on clock rate change is allowed. */
+#define nMUX(_id, cname, pnames, o, s, w) \
+ __MUX(_id, cname, pnames, o, s, w, 0, 0)
+
+#define nMUX_F(_id, cname, pnames, o, s, w, f, mf) \
__MUX(_id, cname, pnames, o, s, w, f, mf)
I find the suggestion fine. Will submit v3 in a min, addressing all the
comments.
Thanks,
ta
