| Message ID | 20230411192153.289688-1-bmasney@redhat.com (mailing list archive) |
|---|---|
| State | Awaiting Upstream, archived |
| Headers | show |
| Series | docs: clk: add documentation to log which clocks have been disabled | expand |
Brian Masney <bmasney@redhat.com> writes: > The existing clk documentation has a section that talks about the > clk_ignore_unused kernel parameter. Add additional documentation that > describes how to log which clocks the kernel disables on bootup. This > will log messages like the following to the console on bootup: > > [ 1.268115] clk: Disabling unused clocks > [ 1.272167] clk_disable: gcc_usb_clkref_en > [ 1.276389] clk_disable: gcc_usb30_sec_sleep_clk > [ 1.281131] clk_disable: gcc_usb30_prim_sleep_clk > ... > > Signed-off-by: Brian Masney <bmasney@redhat.com> > --- > Documentation/driver-api/clk.rst | 5 +++++ > 1 file changed, 5 insertions(+) I've applied this, but... > diff --git a/Documentation/driver-api/clk.rst b/Documentation/driver-api/clk.rst > index 3cad45d14187..2199c0042e75 100644 > --- a/Documentation/driver-api/clk.rst > +++ b/Documentation/driver-api/clk.rst > @@ -258,6 +258,11 @@ clocks properly but rely on them being on from the bootloader, bypassing > the disabling means that the driver will remain functional while the issues > are sorted out. > > +You can see which clocks have been disabled by booting your kernel with these > +parameters: ...I took the liberty of making that "parameters::" so that the options would be formatted as a literal block. > + tp_printk trace_event=clk:clk_disable > + > To bypass this disabling, include "clk_ignore_unused" in the bootargs to the > kernel. Thanks, jon
diff --git a/Documentation/driver-api/clk.rst b/Documentation/driver-api/clk.rst index 3cad45d14187..2199c0042e75 100644 --- a/Documentation/driver-api/clk.rst +++ b/Documentation/driver-api/clk.rst @@ -258,6 +258,11 @@ clocks properly but rely on them being on from the bootloader, bypassing the disabling means that the driver will remain functional while the issues are sorted out. +You can see which clocks have been disabled by booting your kernel with these +parameters: + + tp_printk trace_event=clk:clk_disable + To bypass this disabling, include "clk_ignore_unused" in the bootargs to the kernel.
The existing clk documentation has a section that talks about the clk_ignore_unused kernel parameter. Add additional documentation that describes how to log which clocks the kernel disables on bootup. This will log messages like the following to the console on bootup: [ 1.268115] clk: Disabling unused clocks [ 1.272167] clk_disable: gcc_usb_clkref_en [ 1.276389] clk_disable: gcc_usb30_sec_sleep_clk [ 1.281131] clk_disable: gcc_usb30_prim_sleep_clk ... Signed-off-by: Brian Masney <bmasney@redhat.com> --- Documentation/driver-api/clk.rst | 5 +++++ 1 file changed, 5 insertions(+)