[PATCH 3/9] arm: socfpga: dm: Add clock manager for Diamond Mesa

[Jit Loon Lim]

From: Siew Chin Lim <elly.siew.chin.lim at intel.com>

Add clock manager driver for Diamond Mesa.

Signed-off-by: Siew Chin Lim <elly.siew.chin.lim at intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim at intel.com>
---
 arch/arm/mach-socfpga/clock_manager_dm.c      | 79 +++++++++++++++++++
 .../include/mach/clock_manager_dm.h           | 14 ++++
 2 files changed, 93 insertions(+)
 create mode 100644 arch/arm/mach-socfpga/clock_manager_dm.c
 create mode 100644 arch/arm/mach-socfpga/include/mach/clock_manager_dm.h

diff --git a/arch/arm/mach-socfpga/clock_manager_dm.c b/arch/arm/mach-socfpga/clock_manager_dm.c
new file mode 100644
index 0000000000..47a7693845
--- /dev/null
+++ b/arch/arm/mach-socfpga/clock_manager_dm.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <malloc.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/arch/system_manager.h>
+#include <asm/io.h>
+#include <dt-bindings/clock/dm-clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+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_DRIVER_GET(socfpga_dm_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)-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(DM_MPU_CLK);
+}
+
+unsigned int cm_get_l4_sys_free_clk_hz(void)
+{
+	return cm_get_rate_dm(DM_L4_SYS_FREE_CLK);
+}
+
+void cm_print_clock_quick_summary(void)
+{
+	printf("MPU       %10d kHz\n",
+	       cm_get_rate_dm_khz(DM_MPU_CLK));
+	printf("L4 Main	    %8d kHz\n",
+	       cm_get_rate_dm_khz(DM_L4_MAIN_CLK));
+	printf("L4 sys free %8d kHz\n",
+	       cm_get_rate_dm_khz(DM_L4_SYS_FREE_CLK));
+	printf("L4 MP       %8d kHz\n",
+	       cm_get_rate_dm_khz(DM_L4_MP_CLK));
+	printf("L4 SP       %8d kHz\n",
+	       cm_get_rate_dm_khz(DM_L4_SP_CLK));
+	printf("SDMMC       %8d kHz\n",
+	       cm_get_rate_dm_khz(DM_SDMMC_CLK));
+}
diff --git a/arch/arm/mach-socfpga/include/mach/clock_manager_dm.h b/arch/arm/mach-socfpga/include/mach/clock_manager_dm.h
new file mode 100644
index 0000000000..a355fda692
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/clock_manager_dm.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Intel Corporation <www.intel.com>
+ */
+
+#ifndef _CLOCK_MANAGER_DM_
+#define _CLOCK_MANAGER_DM_
+
+unsigned long cm_get_mpu_clk_hz(void);
+
+#include <asm/arch/clock_manager_soc64.h>
+#include "../../../../../drivers/clk/altera/clk-dm.h"
+
+#endif /* _CLOCK_MANAGER_DM_ */
-- 
2.26.2