clk: qcom: Add support for RPM Clocks

This adds initial support for clocks controlled by the Resource
Power Manager (RPM) processor on some Qualcomm SoCs, which use
the qcom_rpm driver to communicate with RPM.
Such platforms are apq8064 and msm8960.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

Documentation/devicetree/bindings/clock/qcom,rpmcc.txt

@@ -11,6 +11,7 @@ Required properties :
                compatible "qcom,rpmcc" should be also included.
 
 			"qcom,rpmcc-msm8916", "qcom,rpmcc"
+			"qcom,rpmcc-apq8064", "qcom,rpmcc"
 
 - #clock-cells : shall contain 1
 

drivers/clk/qcom/Kconfig

@@ -12,6 +12,19 @@ config COMMON_CLK_QCOM
 	select REGMAP_MMIO
 	select RESET_CONTROLLER
 
+config QCOM_CLK_RPM
+	tristate "RPM based Clock Controller"
+	depends on COMMON_CLK_QCOM && MFD_QCOM_RPM
+	select QCOM_RPMCC
+	help
+	  The RPM (Resource Power Manager) is a dedicated hardware engine for
+	  managing the shared SoC resources in order to keep the lowest power
+	  profile. It communicates with other hardware subsystems via shared
+	  memory and accepts clock requests, aggregates the requests and turns
+	  the clocks on/off or scales them on demand.
+	  Say Y if you want to support the clocks exposed by the RPM on
+	  platforms such as apq8064, msm8660, msm8960 etc.
+
 config QCOM_CLK_SMD_RPM
 	tristate "RPM over SMD based Clock Controller"
 	depends on COMMON_CLK_QCOM && QCOM_SMD_RPM

drivers/clk/qcom/Makefile

@@ -29,4 +29,5 @@ obj-$(CONFIG_MSM_LCC_8960) += lcc-msm8960.o
 obj-$(CONFIG_MSM_MMCC_8960) += mmcc-msm8960.o
 obj-$(CONFIG_MSM_MMCC_8974) += mmcc-msm8974.o
 obj-$(CONFIG_MSM_MMCC_8996) += mmcc-msm8996.o
+obj-$(CONFIG_QCOM_CLK_RPM) += clk-rpm.o
 obj-$(CONFIG_QCOM_CLK_SMD_RPM) += clk-smd-rpm.o

include/dt-bindings/clock/qcom,rpmcc.h

@@ -14,6 +14,30 @@
 #ifndef _DT_BINDINGS_CLK_MSM_RPMCC_H
 #define _DT_BINDINGS_CLK_MSM_RPMCC_H
 
+/* apq8064 */
+#define RPM_PXO_CLK				0
+#define RPM_PXO_A_CLK				1
+#define RPM_CXO_CLK				2
+#define RPM_CXO_A_CLK				3
+#define RPM_APPS_FABRIC_CLK			4
+#define RPM_APPS_FABRIC_A_CLK			5
+#define RPM_CFPB_CLK				6
+#define RPM_CFPB_A_CLK				7
+#define RPM_QDSS_CLK				8
+#define RPM_QDSS_A_CLK				9
+#define RPM_DAYTONA_FABRIC_CLK			10
+#define RPM_DAYTONA_FABRIC_A_CLK		11
+#define RPM_EBI1_CLK				12
+#define RPM_EBI1_A_CLK				13
+#define RPM_MM_FABRIC_CLK			14
+#define RPM_MM_FABRIC_A_CLK			15
+#define RPM_MMFPB_CLK				16
+#define RPM_MMFPB_A_CLK				17
+#define RPM_SYS_FABRIC_CLK			18
+#define RPM_SYS_FABRIC_A_CLK			19
+#define RPM_SFPB_CLK				20
+#define RPM_SFPB_A_CLK				21
+
 /* msm8916 */
 #define RPM_SMD_XO_CLK_SRC				0
 #define RPM_SMD_XO_A_CLK_SRC			1