13 Mar
2021
13 Mar
'21
8:23 p.m.
Quoting Douglas Anderson (2021-03-04 15:51:59)
The clock framework makes it simple to deal with an optional clock. You can call clk_get_optional() and if the clock isn't specified it'll just return NULL without complaint. It's valid to pass NULL to enable/disable/prepare/unprepare. Let's make use of this to simplify things a tiny bit.
NOTE: this makes things look a tad bit asymmetric now since we check for NULL before clk_prepare_enable() but not for clk_disable_unprepare(). This seemed OK to me. We already have to check for NULL in the enable case anyway so why not avoid the extra call?
Signed-off-by: Douglas Anderson dianders@chromium.org
Reviewed-by: Stephen Boyd swboyd@chromium.org