[U-Boot] [RESEND PATCH v2 08/15] arm: socfpga: agilex: Add clock manager support

[Ley Foon Tan]

Add clock manager support for Agilex.

Signed-off-by: Ley Foon Tan <ley.foon.tan at intel.com>

---
v2:
- Get clocks from clock DM.
---
 arch/arm/mach-socfpga/Makefile                |  4 +
 arch/arm/mach-socfpga/clock_manager_agilex.c  | 87 +++++++++++++++++++
 .../include/mach/clock_manager_agilex.h       |  2 +
 3 files changed, 93 insertions(+)
 create mode 100644 arch/arm/mach-socfpga/clock_manager_agilex.c

diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
index 11370cf4c4..5bb36d07df 100644
--- a/arch/arm/mach-socfpga/Makefile
+++ b/arch/arm/mach-socfpga/Makefile
@@ -40,6 +40,10 @@ obj-y	+= wrap_pinmux_config_s10.o
 obj-y	+= wrap_pll_config_s10.o
 endif
 
+ifdef CONFIG_TARGET_SOCFPGA_AGILEX
+obj-y	+= clock_manager_agilex.o
+endif
+
 ifdef CONFIG_SPL_BUILD
 ifdef CONFIG_TARGET_SOCFPGA_GEN5
 obj-y	+= spl_gen5.o
diff --git a/arch/arm/mach-socfpga/clock_manager_agilex.c b/arch/arm/mach-socfpga/clock_manager_agilex.c
new file mode 100644
index 0000000000..5159415fbf
--- /dev/null
+++ b/arch/arm/mach-socfpga/clock_manager_agilex.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/arch/system_manager.h>
+#include <asm/io.h>
+#include <dt-bindings/clock/stratix10-clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_system_manager *sysmgr_regs =
+		(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
+
+static ulong cm_get_rate_dm(u32 id)
+{
+	struct udevice *dev;
+	struct clk clk;
+	ulong rate;
+	int ret;
+
+	ret = uclass_get_device_by_driver(UCLASS_CLK,
+					  DM_GET_DRIVER(socfpga_agilex_clk),
+					  &dev);
+	if (ret)
+		return 0;
+
+	clk.id = id;
+	ret = clk_request(dev, &clk);
+	if (ret < 0)
+		return 0;
+
+	rate = clk_get_rate(&clk);
+
+	clk_free(&clk);
+
+	if ((rate == (unsigned long)-ENOSYS) ||
+	    (rate == (unsigned long)-ENXIO) ||
+	    (rate == (unsigned long)-EIO)) {
+		debug("%s id %u: clk_get_rate err: %ld\n",
+		      __func__, id, rate);
+		return 0;
+	}
+
+	return rate;
+}
+
+static u32 cm_get_rate_dm_khz(u32 id)
+{
+	return cm_get_rate_dm(id) / 1000;
+}
+
+unsigned long cm_get_mpu_clk_hz(void)
+{
+	return cm_get_rate_dm(STRATIX10_MPU_CLK);
+}
+
+unsigned int cm_get_l4_sys_free_clk_hz(void)
+{
+	return cm_get_rate_dm(STRATIX10_L4_SYS_FREE_CLK);
+}
+
+u32 cm_get_qspi_controller_clk_hz(void)
+{
+	return readl(&sysmgr_regs->boot_scratch_cold0);
+}
+
+void cm_print_clock_quick_summary(void)
+{
+	printf("MPU       %10d kHz\n",
+	       cm_get_rate_dm_khz(STRATIX10_MPU_CLK));
+	printf("L4 Main	    %8d kHz\n",
+	       cm_get_rate_dm_khz(STRATIX10_L4_MAIN_CLK));
+	printf("L4 sys free %8d kHz\n",
+	       cm_get_rate_dm_khz(STRATIX10_L4_SYS_FREE_CLK));
+	printf("L4 MP       %8d kHz\n",
+	       cm_get_rate_dm_khz(STRATIX10_L4_MP_CLK));
+	printf("L4 SP       %8d kHz\n",
+	       cm_get_rate_dm_khz(STRATIX10_L4_SP_CLK));
+	printf("SDMMC       %8d kHz\n",
+	       cm_get_rate_dm_khz(STRATIX10_SDMMC_CLK));
+}
diff --git a/arch/arm/mach-socfpga/include/mach/clock_manager_agilex.h b/arch/arm/mach-socfpga/include/mach/clock_manager_agilex.h
index bf5e7c8775..c4d27bad72 100644
--- a/arch/arm/mach-socfpga/include/mach/clock_manager_agilex.h
+++ b/arch/arm/mach-socfpga/include/mach/clock_manager_agilex.h
@@ -25,6 +25,8 @@ const unsigned int cm_get_osc_clk_hz(void);
 const unsigned int cm_get_intosc_clk_hz(void);
 const unsigned int cm_get_fpga_clk_hz(void);
 
+unsigned long cm_get_mpu_clk_hz(void);
+
 #define CLKMGR_EOSC1_HZ		25000000
 #define CLKMGR_INTOSC_HZ	400000000
 #define CLKMGR_FPGA_CLK_HZ	50000000
-- 
2.19.0