Re: [PATCH v5 10/23] clk: starfive: Add JHB100 System-2 clock generator driver

Add support for JHB100 System-2 clock generator (SYS2CRG).

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>

diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index 11da8bcc4046..cfaac934a8e0 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig

@@ -92,3 +92,13 @@ config CLK_STARFIVE_JHB100_SYS1
 	help
 	  Say yes here to support the system-1 clock controller on the
 	  StarFive JHB100 SoC.
+
+config CLK_STARFIVE_JHB100_SYS2
+	bool "StarFive JHB100 system-2 clock support"
+	depends on ARCH_STARFIVE || COMPILE_TEST
+	select CLK_STARFIVE_JH71X0
+	select RESET_STARFIVE_JHB100 if RESET_CONTROLLER
+	default ARCH_STARFIVE
+	help
+	  Say yes here to support the system-2 clock controller on the
+	  StarFive JHB100 SoC.

diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
index 0061550e0f7e..29cdef20575e 100644
--- a/drivers/clk/starfive/Makefile
+++ b/drivers/clk/starfive/Makefile

@@ -13,3 +13,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7110_VOUT)	+= clk-starfive-jh7110-vout.o
 
 obj-$(CONFIG_CLK_STARFIVE_JHB100_SYS0)		+= clk-starfive-jhb100-sys0.o
 obj-$(CONFIG_CLK_STARFIVE_JHB100_SYS1)		+= clk-starfive-jhb100-sys1.o
+obj-$(CONFIG_CLK_STARFIVE_JHB100_SYS2)		+= clk-starfive-jhb100-sys2.o

diff --git a/drivers/clk/starfive/clk-starfive-jhb100-sys2.c b/drivers/clk/starfive/clk-starfive-jhb100-sys2.c
new file mode 100644
index 000000000000..a2c7e8eba9b6
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jhb100-sys2.c

@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JHB100 System-2 Clock Driver
+ *
+ * Copyright (C) 2024 StarFive Technology Co., Ltd.
+ *
+ * Author: Changhuang Liang <changhuang.liang@starfivetech.com>
+ *
+ */
+
+#include <dt-bindings/clock/starfive,jhb100-crg.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include "clk-starfive-jh71x0.h"
+
+#define JHB100_SYS2CLK_NUM_CLKS			(JHB100_SYS2CLK_MAIN_ICG_EN_JTAG1 + 1)
+
+/* external clocks */
+#define JHB100_SYS2CLK_OSC			(JHB100_SYS2CLK_NUM_CLKS + 0)
+#define JHB100_SYS2CLK_PLL1			(JHB100_SYS2CLK_NUM_CLKS + 1)
+#define JHB100_SYS2CLK_GPU0_NCNOC_INIT		(JHB100_SYS2CLK_NUM_CLKS + 2)
+#define JHB100_SYS2CLK_GPU1_NCNOC_INIT		(JHB100_SYS2CLK_NUM_CLKS + 3)
+
+static const char * const jhb100_sys2_ext_clk[] = {
+	"osc",
+	"pll1",
+	"gpu0_ncnoc_init",
+	"gpu1_ncnoc_init",
+};
+
+static const struct jh71x0_clk_data jhb100_sys2crg_clk_data[] = {
+	/* jtag mst*/
+	JH71X0__DIV(JHB100_SYS2CLK_JTAGM0_HCLK, "jtagm0_hclk", 6,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS2CLK_JTAGM1_HCLK, "jtagm1_hclk", 6,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS2CLK_JTAGM0_ATPG, "jtagm0_ATPG", 12,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS2CLK_JTAGM1_ATPG, "jtagm1_ATPG", 12,
+		    JHB100_SYS2CLK_PLL1),