| Message ID | 1462463608-22940-2-git-send-email-kernel@martin.sperl.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, May 05, 2016 at 03:53:24PM +0000, kernel@martin.sperl.org wrote: > From: Martin Sperl <kernel@martin.sperl.org> > > Add documentation for "brcm,clock-index" and "brcm,clock-flags" > which allows to set flags to enable the use of parent clocks > that may be different from the default. assigned-clocks provides a way to do this already though that does mean exposing all the parents to DT. Does that not work for you? > In the future this may also contain flags that would allow > enabling higher order mash dividers. > > Signed-off-by: Martin Sperl <kernel@martin.sperl.org> > --- > .../devicetree/bindings/clock/brcm,bcm2835-cprman.txt | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt > index e56a1df..cbcca56 100644 > --- a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt > +++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt > @@ -18,6 +18,15 @@ Required properties: > - reg: Specifies base physical address and size of the registers > - clocks: The external oscillator clock phandle > > +Optional properties: > +- brcm,clock-index: clock id to which the corresponding brcm,clock-flags > + value applies > +- brcm,clock-flags: flags for the specific clock id given in > + brcm,clock-index - the bits are defined in > + include/dt-bindings/clock/bcm2835.h > + of which the bottom 16 bits are reserved for > + parent clock selection. These are an array or single value? I tend to think these should be generic properties or not at all. I'd like to hear Mike's and/or Stephen's opinion on it. Rob
diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt index e56a1df..cbcca56 100644 --- a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt +++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt @@ -18,6 +18,15 @@ Required properties: - reg: Specifies base physical address and size of the registers - clocks: The external oscillator clock phandle +Optional properties: +- brcm,clock-index: clock id to which the corresponding brcm,clock-flags + value applies +- brcm,clock-flags: flags for the specific clock id given in + brcm,clock-index - the bits are defined in + include/dt-bindings/clock/bcm2835.h + of which the bottom 16 bits are reserved for + parent clock selection. + Example: clk_osc: clock@3 { @@ -33,7 +42,11 @@ Example: #clock-cells = <1>; reg = <0x7e101000 0x2000>; clocks = <&clk_osc>; + /* the pcm clock should use the non-standard pllc-per parent */ + brcm,clock-index = <BCM2835_CLOCK_PCM>; + brcm,clock-flags = <((1 <<BCM2835_PER_PARENT_GND)| + (1 <<BCM2835_PER_PARENT_OSC)| + (1 <<BCM2835_PER_PARENT_PLLC))>; }; i2c0: i2c@7e205000 { --