[PATCH v6 06/15] clk: starfive: Add JHB100 System-1 clock generator driver

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

Add support for JHB100 System-1 clock generator (SYS1CRG).

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
 drivers/clk/starfive/Kconfig                  |  10 ++
 drivers/clk/starfive/Makefile                 |   1 +
 .../clk/starfive/clk-starfive-jhb100-sys1.c   | 118 ++++++++++++++++++
 3 files changed, 129 insertions(+)
 create mode 100644 drivers/clk/starfive/clk-starfive-jhb100-sys1.c

diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index cd5b7754403e..11da8bcc4046 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig
@@ -82,3 +82,13 @@ config CLK_STARFIVE_JHB100_SYS0
 	help
 	  Say yes here to support the system-0 clock controller on the
 	  StarFive JHB100 SoC.
+
+config CLK_STARFIVE_JHB100_SYS1
+	bool "StarFive JHB100 system-1 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-1 clock controller on the
+	  StarFive JHB100 SoC.
diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
index d2ba83d7d02c..0061550e0f7e 100644
--- a/drivers/clk/starfive/Makefile
+++ b/drivers/clk/starfive/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7110_ISP)	+= clk-starfive-jh7110-isp.o
 obj-$(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
diff --git a/drivers/clk/starfive/clk-starfive-jhb100-sys1.c b/drivers/clk/starfive/clk-starfive-jhb100-sys1.c
new file mode 100644
index 000000000000..db37b243db18
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jhb100-sys1.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JHB100 System-1 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_SYS1CLK_NUM_CLKS			(JHB100_SYS1CLK_BMCPER3_CFG_125 + 1)
+
+/* external clocks */
+#define JHB100_SYS1CLK_OSC			(JHB100_SYS1CLK_NUM_CLKS + 0)
+#define JHB100_SYS1CLK_PLL0			(JHB100_SYS1CLK_NUM_CLKS + 1)
+#define JHB100_SYS1CLK_PLL1			(JHB100_SYS1CLK_NUM_CLKS + 2)
+#define JHB100_SYS1CLK_PLL2			(JHB100_SYS1CLK_NUM_CLKS + 3)
+#define JHB100_SYS1CLK_PLL4			(JHB100_SYS1CLK_NUM_CLKS + 4)
+#define JHB100_SYS1CLK_PLL5			(JHB100_SYS1CLK_NUM_CLKS + 5)
+#define JHB100_SYS1CLK_NPU_NCNOC_INIT		(JHB100_SYS1CLK_NUM_CLKS + 6)
+
+static const char * const jhb100_sys1_ext_clk[] = {
+	"osc",
+	"pll0",
+	"pll1",
+	"pll2",
+	"pll4",
+	"pll5",
+	"npu_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.
+ *
+ * Regarding the CLK_IGNORE_UNUSED flag:
+ *   Clocks flagged CLK_IGNORE_UNUSED are not consumed by any driver. The flag
+ *   keeps them in their hardware default state (enabled) instead of letting
+ *   the clock framework gate them once it disables unused clocks.  If this
+ *   flag needs to be removed later, it must be ensured that these clocks will
+ *   not be disabled even if they are not consumed.
+ */
+static const struct jh71x0_clk_data jhb100_sys1crg_clk_data[] = {
+	/* root */
+	JH71X0__DIV(JHB100_SYS1CLK_APB_MAIN_SYS1, "apb_main_sys1", 12,
+		    JHB100_SYS1CLK_PLL1),
+	/* sensor */
+	JH71X0_GATE(JHB100_SYS1CLK_APB_SENSOR_ICG_BUF, "apb_sensor_icg_buf",
+		    CLK_IS_CRITICAL, JHB100_SYS1CLK_APB_MAIN_SYS1),
+	/* hostss1 */
+	JH71X0__DIV(JHB100_SYS1CLK_GPIO_ESPI1_EXT, "gpio_espi1_ext", 14,
+		    JHB100_SYS1CLK_PLL2),
+	JH71X0__DIV(JHB100_SYS1CLK_HOSTSS1_NCNOC_CFG, "hostss1_ncnoc_cfg", 12,
+		    JHB100_SYS1CLK_PLL1),
+	JH71X0_GATE(JHB100_SYS1CLK_HOSTSS1_PHY_SCAN_1000_ICG_BUF,
+		    "hostss1_phy_scan_1000_icg_buf", CLK_IS_CRITICAL,
+		    JHB100_SYS1CLK_PLL1),
+	/* npu */
+	JH71X0__DIV(JHB100_SYS1CLK_NPU_NCNOC_CFG, "npu_ncnoc_cfg", 6,
+		    JHB100_SYS1CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS1CLK_NPU_CORE_DIV, "npu_core_div", 10,
+		    JHB100_SYS1CLK_PLL0),
+	JH71X0_GATE(JHB100_SYS1CLK_DOM_NPU_CORE_CLK, "dom_npu_core_clk",
+		    CLK_IS_CRITICAL, JHB100_SYS1CLK_NPU_CORE_DIV),
+	JH71X0_GATE(JHB100_SYS1CLK_DOM_NPU_BUS_CLK, "dom_npu_bus_clk",
+		    CLK_IS_CRITICAL, JHB100_SYS1CLK_NPU_NCNOC_INIT),
+	JH71X0_GATE(JHB100_SYS1CLK_DOM_NPU_INIT_CLK, "dom_npu_init_clk",
+		    CLK_IS_CRITICAL, JHB100_SYS1CLK_NPU_NCNOC_CFG),
+	JH71X0_GATE(JHB100_SYS1CLK_DOM_NPU_OSC_CLK, "dom_npu_osc_clk",
+		    CLK_IS_CRITICAL, JHB100_SYS1CLK_OSC),
+	/* vout */
+	JH71X0__DIV(JHB100_SYS1CLK_VOUT_NCNOC_TARG, "vout_ncnoc_targ", 12,
+		    JHB100_SYS1CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS1CLK_VOUT_PIX0, "vout_pix0", 4,
+		    JHB100_SYS1CLK_PLL4),
+	JH71X0__DIV(JHB100_SYS1CLK_VOUT_PIX1, "vout_pix1", 4,
+		    JHB100_SYS1CLK_PLL5),
+	/* bmcperiph3 */
+	JH71X0__DIV(JHB100_SYS1CLK_BMCPER3_NCNOC_TARG, "bmcper3_ncnoc_targ", 12,
+		    JHB100_SYS1CLK_PLL1),
+	JH71X0__DIV(JHB100_SYS1CLK_BMCPER3_CFG_125, "bmcper3_cfg_125", 10,
+		    JHB100_SYS1CLK_PLL1),
+};
+
+static const struct jh71x0_crg_domain_info jhb100_sys1crg_info = {
+	.clk_data	= jhb100_sys1crg_clk_data,
+	.num_clk	= ARRAY_SIZE(jhb100_sys1crg_clk_data),
+	.ext_clk	= jhb100_sys1_ext_clk,
+	.num_ext_clk	= ARRAY_SIZE(jhb100_sys1_ext_clk),
+	.rst_name	= "jhb100-r-sys1",
+	.power_domain	= false,
+};
+
+static const struct of_device_id jhb100_sys1crg_match[] = {
+	{
+		.compatible = "starfive,jhb100-sys1crg",
+		.data = &jhb100_sys1crg_info,
+	},
+	{ /* sentinel */ }
+};
+
+static struct platform_driver jhb100_sys1crg_driver = {
+	.probe = jh71x0_crg_probe,
+	.driver = {
+		.name = "clk-starfive-jhb100-sys1",
+		.of_match_table = jhb100_sys1crg_match,
+		.suppress_bind_attrs = true,
+	},
+};
+builtin_platform_driver(jhb100_sys1crg_driver);
-- 
2.25.1