clk: si521xx: Clock driver for Skyworks Si521xx I2C PCIe clock generators

Add driver for the Skyworks Si521xx PCIe clock generators. Supported models
are Si52144/Si52146/Si52147, tested model is Si52144. It should be possible
to add Si5213x series as well.
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20230118191521.15544-2-marex@denx.de
[sboyd@kernel.org: Make clk_ops const]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/Kconfig

@@ -367,6 +367,15 @@ config COMMON_CLK_RS9_PCIE
 	  This driver supports the Renesas 9-series PCIe clock generator
 	  models 9FGV/9DBV/9DMV/9FGL/9DML/9QXL/9SQ.
 
+config COMMON_CLK_SI521XX
+	tristate "Clock driver for SkyWorks Si521xx PCIe clock generators"
+	depends on I2C
+	depends on OF
+	select REGMAP_I2C
+	help
+	  This driver supports the SkyWorks Si521xx PCIe clock generator
+	  models Si52144/Si52146/Si52147.
+
 config COMMON_CLK_VC5
 	tristate "Clock driver for IDT VersaClock 5,6 devices"
 	depends on I2C

drivers/clk/Makefile

@@ -72,6 +72,7 @@ obj-$(CONFIG_COMMON_CLK_TPS68470)      += clk-tps68470.o
 obj-$(CONFIG_CLK_TWL6040)		+= clk-twl6040.o
 obj-$(CONFIG_ARCH_VT8500)		+= clk-vt8500.o
 obj-$(CONFIG_COMMON_CLK_RS9_PCIE)	+= clk-renesas-pcie.o
+obj-$(CONFIG_COMMON_CLK_SI521XX)	+= clk-si521xx.o
 obj-$(CONFIG_COMMON_CLK_VC5)		+= clk-versaclock5.o
 obj-$(CONFIG_COMMON_CLK_VC7)		+= clk-versaclock7.o
 obj-$(CONFIG_COMMON_CLK_WM831X)		+= clk-wm831x.o