On 10/25/2017 02:59 PM, Rob Herring wrote:
On Wed, Oct 25, 2017 at 2:31 AM, Maciej Purski <m.purski@xxxxxxxxxxx> wrote:
On 10/24/2017 08:58 PM, Rob Herring wrote:
On Wed, Oct 18, 2017 at 02:47:00PM +0200, Maciej Purski wrote:
Some regulators require keeping their voltage spread below defined
max_spread.
Add properties to provide information on regulators' coupling.
Signed-off-by: Maciej Purski <m.purski@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/regulator/regulator.txt | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/Documentation/devicetree/bindings/regulator/regulator.txt
b/Documentation/devicetree/bindings/regulator/regulator.txt
index 378f6dc..6769565 100644
--- a/Documentation/devicetree/bindings/regulator/regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/regulator.txt
@@ -60,6 +60,10 @@ Optional properties:
0: Disable active discharge.
1: Enable active discharge.
Absence of this property will leave configuration to default.
+- regulator-coupled-with: Phandle to regulators with which the regulator
+ should be coupled. Allow up to 9 phandles.
9? Sounds like a driver detail and pretty arbitrary.
It's just a constant number that I defined as MAX_COUPLED, because in fact
there isn't any use-case yet for even more than two regulators so
MAX_COUPLED equal to 9 is a really high number. If you find it cleaner, I
can make this value variable.
Just drop the statement. The OS simply needs to support however many
there are for the h/w it supports.
Ok, I get this.
Is this linkage 2-way meaning 2 coupled regulators both have links to
the other one? If so, then what happens when you have a high number? If
not, how does one decide which regulator has this property?
Yes, it is 2-way. When you have a high number, then each regulator should
have phandles to every other. So, if you have 3 regulators coupled, then
each one should have 2 phandles.
Please add this to the description. That doesn't really seem ideal if
you have a lot, but I somewhat doubt we'll see more than 2-3.
Rob
I'll fix the description in the next version. Yes, I agree that we won't see
more than 2-3 coupled regulators.
Best Regards,
Maciej Purski
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