clk: qcom: Add CMN PLL clock controller driver for IPQ SoC

The CMN PLL clock controller supplies clocks to the hardware
blocks that together make up the Ethernet function on Qualcomm
IPQ SoCs and to GCC. The driver is initially supported for
IPQ9574 SoC.

The CMN PLL clock controller expects a reference input clock
from the on-board Wi-Fi block acting as clock source. The input
reference clock needs to be configured to one of the supported
clock rates.

The controller supplies a number of fixed-rate output clocks.
For the IPQ9574, there is one output clock of 353 MHZ to PPE
(Packet Process Engine) hardware block, three 50 MHZ output
clocks and an additional 25 MHZ output clock supplied to the
connected Ethernet devices. The PLL also supplies a 24 MHZ
clock as XO and a 32 KHZ sleep clock to GCC, and one 31.25
MHZ clock to PCS.

Signed-off-by: Luo Jie <[email protected]>
Acked-by: Konrad Dybcio <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>

Author: Luo Jie

drivers/clk/qcom/Kconfig

@@ -199,6 +199,15 @@ config IPQ_APSS_6018
 	  Say Y if you want to support CPU frequency scaling on
 	  ipq based devices.
 
+config IPQ_CMN_PLL
+	tristate "IPQ CMN PLL Clock Controller"
+	help
+	  Support for CMN PLL clock controller on IPQ platform. The
+	  CMN PLL consumes the AHB/SYS clocks from GCC and supplies
+	  the output clocks to the networking hardware and GCC blocks.
+	  Say Y or M if you want to support CMN PLL clock on the IPQ
+	  based devices.
+
 config IPQ_GCC_4019
 	tristate "IPQ4019 Global Clock Controller"
 	help

drivers/clk/qcom/Makefile

@@ -30,6 +30,7 @@ obj-$(CONFIG_CLK_X1P42100_GPUCC) += gpucc-x1p42100.o
 obj-$(CONFIG_CLK_QCM2290_GPUCC) += gpucc-qcm2290.o
 obj-$(CONFIG_IPQ_APSS_PLL) += apss-ipq-pll.o
 obj-$(CONFIG_IPQ_APSS_6018) += apss-ipq6018.o
+obj-$(CONFIG_IPQ_CMN_PLL) += ipq-cmn-pll.o
 obj-$(CONFIG_IPQ_GCC_4019) += gcc-ipq4019.o
 obj-$(CONFIG_IPQ_GCC_5018) += gcc-ipq5018.o
 obj-$(CONFIG_IPQ_GCC_5332) += gcc-ipq5332.o