lkml.org 
[lkml]   [2024]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/5] Rework SCMI Clock driver clk_ops setup procedure
Date
Hi,

a small series to review how the SCMI Clock driver chooses and sets up the
CLK operations to associate to a clock when registering with CLK framework.

SCMI clocks exposed by the platform sports a growing number of clock
properties since SCMI v3.2: discovered SCMI clocks could be restricted in
terms of capability to set state/rate/parent/duty_cycle and the platform
itself can have a varying support in terms of atomic support.

Knowing upfront which operations are NOT allowed on some clocks helps
avoiding needless message exchanges.

As a result, the SCMI Clock driver, when registering resources with the
CLK framework, aims to provide only the specific clk_ops as known to be
certainly supported by the specific SCMI clock resource.

Using static pre-compiled clk_ops structures to fulfill all the possible
(and possibly growing) combinations of clock features is cumbersome and
error-prone (there are 32 possible combinations as of now to account for
the above mentioned clock features variation).

This rework introduces a dynamic allocation mechanism to be able to
configure the required clk_ops at run-time when the SCMI clocks are
enumerated.

Only one single clk_ops is generated for each of the features combinations
effectively found in the set of returned SCMI resources.

Based on sudeep/for-linux-next.

Thanks,
Cristian

Cristian Marussi (5):
clk: scmi: Allocate CLK operations dynamically
clk: scmi: Add support for state control restricted clocks
clk: scmi: Add support for rate change restricted clocks
clk: scmi: Add support for re-parenting restricted clocks
clk: scmi: Add support for get/set duty_cycle operations

drivers/clk/clk-scmi.c | 226 ++++++++++++++++++++++++++++++++---------
1 file changed, 179 insertions(+), 47 deletions(-)

--
2.43.0


\
 
 \ /
  Last update: 2024-05-27 15:25    [W:0.057 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site