pmic: Convert pm8916 driver to a generic Qcom PMIC driver

Since both pm8916.c and pm8916_gpio.c are already supporting multiple
Qcom SoCs, it makes sense to rename these drivers to pmic_qcom.c and
qcom_pmic_gpio.c respectively. Also, these driver can be extended to
support additional functionality if required for other Qcom SoCs.

Along with this import latest DT binding: qcom,spmi-pmic.txt from Linux
kernel and thereby remove pm8916.txt.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>

2 files changed, 94 insertions, 18 deletions

diff --git a/doc/device-tree-bindings/pmic/pm8916.txt b/doc/device-tree-bindings/pmic/pm8916.txt
deleted file mode 100644
index 15c598b8c4c..00000000000
--- a/doc/device-tree-bindings/pmic/pm8916.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-Qualcomm pm8916 PMIC
-
-This PMIC is connected using SPMI bus so should be child of SPMI bus controller.
-
-Required properties:
-- compatible: "qcom,spmi-pmic";
-- reg: SPMI Slave ID, size (ignored)
-- #address-cells: 0x1 (peripheral ID)
-- #size-cells: 0x1 (size of peripheral register space)
-
-Example:
-
-pm8916@0 {
-	compatible = "qcom,spmi-pmic";
-	reg = <0x0 0x1>;
-	#address-cells = <0x1>;
-	#size-cells = <0x1>;
-};
diff --git a/doc/device-tree-bindings/pmic/qcom,spmi-pmic.txt b/doc/device-tree-bindings/pmic/qcom,spmi-pmic.txt
new file mode 100644
index 00000000000..eb78e3ae770
--- /dev/null
+++ b/doc/device-tree-bindings/pmic/qcom,spmi-pmic.txt
@@ -0,0 +1,94 @@
+          Qualcomm SPMI PMICs multi-function device bindings
+
+The Qualcomm SPMI series presently includes PM8941, PM8841 and PMA8084
+PMICs.  These PMICs use a QPNP scheme through SPMI interface.
+QPNP is effectively a partitioning scheme for dividing the SPMI extended
+register space up into logical pieces, and set of fixed register
+locations/definitions within these regions, with some of these regions
+specifically used for interrupt handling.
+
+The QPNP PMICs are used with the Qualcomm Snapdragon series SoCs, and are
+interfaced to the chip via the SPMI (System Power Management Interface) bus.
+Support for multiple independent functions are implemented by splitting the
+16-bit SPMI slave address space into 256 smaller fixed-size regions, 256 bytes
+each. A function can consume one or more of these fixed-size register regions.
+
+Required properties:
+- compatible:      Should contain one of:
+                   "qcom,pm660",
+                   "qcom,pm660l",
+                   "qcom,pm7325",
+                   "qcom,pm8004",
+                   "qcom,pm8005",
+                   "qcom,pm8019",
+                   "qcom,pm8028",
+                   "qcom,pm8110",
+                   "qcom,pm8150",
+                   "qcom,pm8150b",
+                   "qcom,pm8150c",
+                   "qcom,pm8150l",
+                   "qcom,pm8226",
+                   "qcom,pm8350c",
+                   "qcom,pm8841",
+                   "qcom,pm8901",
+                   "qcom,pm8909",
+                   "qcom,pm8916",
+                   "qcom,pm8941",
+                   "qcom,pm8950",
+                   "qcom,pm8953",
+                   "qcom,pm8994",
+                   "qcom,pm8998",
+                   "qcom,pma8084",
+                   "qcom,pmd9635",
+                   "qcom,pmi8950",
+                   "qcom,pmi8962",
+                   "qcom,pmi8994",
+                   "qcom,pmi8998",
+                   "qcom,pmk8002",
+                   "qcom,pmk8350",
+                   "qcom,pmr735a",
+                   "qcom,smb2351",
+                   or generalized "qcom,spmi-pmic".
+- reg:             Specifies the SPMI USID slave address for this device.
+                   For more information see:
+                   Documentation/devicetree/bindings/spmi/spmi.yaml
+
+Required properties for peripheral child nodes:
+- compatible:      Should contain "qcom,xxx", where "xxx" is a peripheral name.
+
+Optional properties for peripheral child nodes:
+- interrupts:      Interrupts are specified as a 4-tuple. For more information
+                   see:
+                   Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.yaml
+- interrupt-names: Corresponding interrupt name to the interrupts property
+
+Each child node of SPMI slave id represents a function of the PMIC. In the
+example below the rtc device node represents a peripheral of pm8941
+SID = 0. The regulator device node represents a peripheral of pm8941 SID = 1.
+
+Example:
+
+	spmi {
+		compatible = "qcom,spmi-pmic-arb";
+
+		pm8941@0 {
+			compatible = "qcom,pm8941", "qcom,spmi-pmic";
+			reg = <0x0 SPMI_USID>;
+
+			rtc {
+				compatible = "qcom,rtc";
+				interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
+				interrupt-names = "alarm";
+			};
+		};
+
+		pm8941@1 {
+			compatible = "qcom,pm8941", "qcom,spmi-pmic";
+			reg = <0x1 SPMI_USID>;
+
+			regulator {
+				compatible = "qcom,regulator";
+				regulator-name = "8941_boost";
+			};
+		};
+	};