Re: [PATCH V3] clk: qcom: Add spmi_pmic clock divider support

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On 9/13/2017 11:10 PM, Rob Herring wrote:
On Wed, Sep 06, 2017 at 05:30:07PM +0530, Tirupathi Reddy wrote:
Clkdiv module provides a clock output on the PMIC with CXO as
the source. This clock can be routed through PMIC GPIOs. Add
a device driver to configure this clkdiv module.

Signed-off-by: Tirupathi Reddy <tirupath@xxxxxxxxxxxxxx>
---
  .../bindings/clock/clk-spmi-pmic-div.txt           |  51 +++
  drivers/clk/qcom/Kconfig                           |   9 +
  drivers/clk/qcom/Makefile                          |   1 +
  drivers/clk/qcom/clk-spmi-pmic-div.c               | 342 +++++++++++++++++++++
  4 files changed, 403 insertions(+)
  create mode 100644 Documentation/devicetree/bindings/clock/clk-spmi-pmic-div.txt
  create mode 100644 drivers/clk/qcom/clk-spmi-pmic-div.c

diff --git a/Documentation/devicetree/bindings/clock/clk-spmi-pmic-div.txt b/Documentation/devicetree/bindings/clock/clk-spmi-pmic-div.txt
new file mode 100644
index 0000000..8b84b32
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/clk-spmi-pmic-div.txt
@@ -0,0 +1,51 @@
+Qualcomm Technologies, Inc. SPMI PMIC clock divider (clkdiv)
+
+clkdiv configures the clock frequency of a set of outputs on the PMIC.
+These clocks are typically wired through alternate functions on
+gpio pins.
+
+=======================
+Properties
+=======================
+
+- compatible
+	Usage:      required
+	Value type: <string>
+	Definition: must be one of:
+		    "qcom,spmi-clkdiv"
If this is not a fallback, drop it.
Here "qcom,spmi-clkdiv" is used as generic string for registering only one clk and the pmic specific strings are used for registering more than one clk following
the given base address in "reg" property.

+		    "qcom,pm8998-clkdiv"
+
+- reg
+	Usage:      required
+	Value type: <prop-encoded-array>
+	Definition: Addresses and sizes for the memory of this CLKDIV
+		    peripheral.
+
+- clocks:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: reference to the xo clock.
+
+- clock-names:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be "xo".
Missing #clock-cells
Added in next patch set.

+
+=======
+Example
+=======
+
+pm8998_clk_divs: qcom,clkdiv@5b00 {
clock@5b00
Addressed in next patch.

+	compatible = "qcom,pm8998-clkdiv";
+	reg = <0x5b00>;
+	#clock-cells = <1>;
+	clocks = <&xo_board>;
+	clock-names = "xo";
+
+	assigned-clocks = <&pm8998_clk_divs 1>,
+			  <&pm8998_clk_divs 2>,
+			  <&pm8998_clk_divs 3>;
+	assigned-clock-rates = <9600000>,
+			       <9600000>,
+			       <9600000>;
+};

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