On 13/10/17 20:17, Rob Herring wrote:
On Fri, Oct 06, 2017 at 05:51:32PM +0200, srinivas.kandagatla@xxxxxxxxxx wrote:
From: Sagar Dharia <sdharia@xxxxxxxxxxxxxx>
This controller driver programs manager, interface, and framer
devices for Qualcomm's slimbus HW block.
Manager component currently implements logical address setting,
and messaging interface.
Interface device reports bus synchronization information, and framer
device clocks the bus from the time it's woken up, until clock-pause
is executed by the manager device.
Signed-off-by: Sagar Dharia <sdharia@xxxxxxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
.../devicetree/bindings/slimbus/slim-qcom-ctrl.txt | 43 ++
Version 6 and this is the first I see it? Where's the version history?
Its been a very long time (18 months) from v5-v6, I will try see if I
can pull up some version history from past few year patches :-) before i
send next version. If it helps review process.
Please split to separate patch.
Will do that in next version.
drivers/slimbus/Kconfig | 9 +
drivers/slimbus/Makefile | 3 +
drivers/slimbus/slim-qcom-ctrl.c | 594 +++++++++++++++++++++
drivers/slimbus/slim-qcom.h | 63 +++
5 files changed, 712 insertions(+)
create mode 100644 Documentation/devicetree/bindings/slimbus/slim-qcom-ctrl.txt
create mode 100644 drivers/slimbus/slim-qcom-ctrl.c
create mode 100644 drivers/slimbus/slim-qcom.h
diff --git a/Documentation/devicetree/bindings/slimbus/slim-qcom-ctrl.txt b/Documentation/devicetree/bindings/slimbus/slim-qcom-ctrl.txt
new file mode 100644
index 0000000..081110d
--- /dev/null
+++ b/Documentation/devicetree/bindings/slimbus/slim-qcom-ctrl.txt
@@ -0,0 +1,43 @@
+Qualcomm SLIMBUS controller
+This controller is used if applications processor driver controls slimbus
+master component.
+
+Required properties:
+
+ - #address-cells - refer to Documentation/devicetree/bindings/slimbus/bus.txt
+ - #size-cells - refer to Documentation/devicetree/bindings/slimbus/bus.txt
+
+ - reg : Offset and length of the register region(s) for the device
+ - reg-names : Register region name(s) referenced in reg above
+ Required register resource entries are:
+ "ctrl": Physical adderess of controller register blocks
+ - compatible : should be "qcom,<SOC-NAME>-slim" for SOC specific compatible or
+ "qcom,slim" if using generic qcom SLIM IP.
No such thing as generic IP.Yep, i though I removed such instances, but it looks like there are
still in more places, I will rescan for them before sending next version.
Fine as a fallback, but not by itself.
+ - interrupts : Interrupt number used by this controller
+ - clocks : Interface and core clocks used by this slimbus controller
+ - clock-names : Required clock-name entries are:
+ "iface_clk" : Interface clock for this controller
+ "core_clk" : Interrupt for controller core's BAM
_clk is redundant.
I agree, I will remove this suffixes in next version.
+
+
+Optional property:
+ - reg entry for slew rate : If slew rate control register is provided, this
+ entry should be used.
+ - reg-name for slew rate: "slew"
Pointless to have -name when there is only one.
I agree if it was just one.
Slew is optional resource, but as a whole there are 2 resources for the
controller, so we need -name as there are 2 resources.
+
+Example:
+ slim@28080000 {
+ compatible = "qcom,slim";
+ #address-cells = <4>;
+ #size-cells = <0>;
+ reg = <0x28080000 0x2000>, <0x80207C 4>;
+ reg-names = "ctrl", "slew";
+ interrupts = <0 33 0>;
+ clocks = <&lcc SLIMBUS_SRC>, <&lcc AUDIO_SLIMBUS_CLK>;
+ clock-names = "iface_clk", "core_clk";
+
+ codec: wcd9310@1{
+ compatible = "slim217,60";
+ reg = <1 0>;
This would not compile. You don't have 4 cells here.
Yep, the example needs fixing.. address cells are actually 2.
+ };
+ };
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