[PATCH v6 07/15] clk: starfive: Add JHB100 System-2 clock generator driver

[Changhuang Liang <changhuang.liang@starfivetech.com>]

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

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
 drivers/clk/starfive/Kconfig                  |  10 ++
 drivers/clk/starfive/Makefile                 |   1 +
 .../clk/starfive/clk-starfive-jhb100-sys2.c   | 135 ++++++++++++++++++
 3 files changed, 146 insertions(+)
 create mode 100644 drivers/clk/starfive/clk-starfive-jhb100-sys2.c

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..405f45a3042a
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jhb100-sys2.c
@@ -0,0 +1,135 @@
+// 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",
+};
+
+/*
+ * Regarding the CLK_IS_CRITICAL flag:
+ *   Clocks flagged CLK_IS_CRITICAL feed logic that has to keep running whether
+ *   or not a consumer holds them, such as the bus interconnect and always-on
+ *   blocks. Gating them hangs the system, so they must never be disabled.
+ */
+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),
+	JH71X0__DIV(JHB100_SYS2CLK_JTAGM0_ATPG_TCLOCK, "jtagm0_atpg_tclock", 2,
+		    JHB100_SYS2CLK_JTAGM0_ATPG),
+	JH71X0__DIV(JHB100_SYS2CLK_JTAGM1_ATPG_TCLOCK, "jtagm1_atpg_tclock", 2,
+		    JHB100_SYS2CLK_JTAGM1_ATPG),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG0_MST_WRAP_HCLK, "jtag0_mst_wrap_hclk",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM0_HCLK),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG0_MST_WRAP_CLK_JTAG, "jtag0_mst_wrap_clk_jtag",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM0_HCLK),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG0_MST_WRAP_APB_PCLK, "jtag0_mst_wrap_apb_pclk",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM0_ATPG),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG0_MST_WRAP_ATPG_TCLOCK, "jtag0_mst_wrap_atpg_tclock",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM0_ATPG),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG1_MST_WRAP_HCLK, "jtag1_mst_wrap_hclk",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM1_HCLK),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG1_MST_WRAP_CLK_JTAG, "jtag1_mst_wrap_clk_jtag",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM1_HCLK),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG1_MST_WRAP_APB_PCLK, "jtag1_mst_wrap_apb_pclk",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM1_ATPG),
+	JH71X0_GATE(JHB100_SYS2CLK_JTAG1_MST_WRAP_ATPG_TCLOCK, "jtag1_mst_wrap_atpg_tclock",
+		    CLK_IGNORE_UNUSED, JHB100_SYS2CLK_JTAGM1_ATPG),
+	/* hostusbcmn */
+	JH71X0__DIV(JHB100_SYS2CLK_HOSTUSB_NCNOC_TARG, "hostusb_ncnoc_targ", 12,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS2CLK_HOSTUSBCMN_CFG_500, "hostusbcmn_cfg_500", 4,
+		    JHB100_SYS2CLK_PLL1),
+	/* bmcperiph1 */
+	JH71X0__DIV(JHB100_SYS2CLK_BMCPER1_NCNOC_TARG, "bmcper1_ncnoc_targ", 6,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS2CLK_BMCPER1_CFG_250, "bmcper1_cfg_250", 5,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS2CLK_BMCPER1_CFG_143_DFT, "bmcper1_cfg_143_dft", 8,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0_GATE(JHB100_SYS2CLK_BMCPER1_CFG_143, "bmcper1_cfg_143", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_BMCPER1_CFG_143_DFT),
+	/* bmcperiph0 */
+	JH71X0__DIV(JHB100_SYS2CLK_BMCPER0_NCNOC_TARG, "bmcper0_ncnoc_targ", 6,
+		    JHB100_SYS2CLK_PLL1),
+	/* gpu0 */
+	JH71X0__DIV(JHB100_SYS2CLK_GPU0_NCNOC_TARG, "gpu0_ncnoc_targ", 12,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0_GATE(JHB100_SYS2CLK_GPU0_BUS_CLK, "gpu0_bus_clk", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_GPU0_NCNOC_INIT),
+	JH71X0_GATE(JHB100_SYS2CLK_GPU0_APB_CLK, "gpu0_apb_clk", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_GPU0_NCNOC_TARG),
+	JH71X0_GATE(JHB100_SYS2CLK_GPU0_OSC_CLK, "gpu0_osc_clk", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_OSC),
+	/* gpu1 */
+	JH71X0__DIV(JHB100_SYS2CLK_GPU1_NCNOC_TARG, "gpu1_ncnoc_targ", 12,
+		    JHB100_SYS2CLK_PLL1),
+	JH71X0_GATE(JHB100_SYS2CLK_GPU1_BUS_CLK, "gpu1_bus_clk", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_GPU1_NCNOC_INIT),
+	JH71X0_GATE(JHB100_SYS2CLK_GPU1_APB_CLK, "gpu1_apb_clk", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_GPU1_NCNOC_TARG),
+	JH71X0_GATE(JHB100_SYS2CLK_GPU1_OSC_CLK, "gpu1_osc_clk", CLK_IS_CRITICAL,
+		    JHB100_SYS2CLK_OSC),
+	/* main icg */
+	JH71X0_GATE(JHB100_SYS2CLK_MAIN_ICG_EN_JTAG0, "main_icg_en_jtag0", 0,
+		    JHB100_SYS2CLK_JTAGM0_HCLK),
+	JH71X0_GATE(JHB100_SYS2CLK_MAIN_ICG_EN_JTAG1, "main_icg_en_jtag1", 0,
+		    JHB100_SYS2CLK_JTAGM1_HCLK),
+};
+
+static const struct jh71x0_crg_domain_info jhb100_sys2crg_info = {
+	.clk_data	= jhb100_sys2crg_clk_data,
+	.num_clk	= ARRAY_SIZE(jhb100_sys2crg_clk_data),
+	.ext_clk	= jhb100_sys2_ext_clk,
+	.num_ext_clk	= ARRAY_SIZE(jhb100_sys2_ext_clk),
+	.rst_name	= "jhb100-r-sys2",
+	.power_domain	= false,
+};
+
+static const struct of_device_id jhb100_sys2crg_match[] = {
+	{
+		.compatible = "starfive,jhb100-sys2crg",
+		.data = &jhb100_sys2crg_info,
+	},
+	{ /* sentinel */ }
+};
+
+static struct platform_driver jhb100_sys2crg_driver = {
+	.probe = jh71x0_crg_probe,
+	.driver = {
+		.name = "clk-starfive-jhb100-sys2",
+		.of_match_table = jhb100_sys2crg_match,
+		.suppress_bind_attrs = true,
+	},
+};
+builtin_platform_driver(jhb100_sys2crg_driver);
-- 
2.25.1