clk: Add Microchip PolarFire SoC clock driver

Add clock driver code for the Microchip PolarFire SoC. This driver
handles reset and clock control of the Microchip PolarFire SoC device.

Signed-off-by: Padmarao Begari <padmarao.begari@microchip.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Bin Meng <bin.meng@windriver.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/drivers/clk/microchip/mpfs_clk.h b/drivers/clk/microchip/mpfs_clk.h
new file mode 100644
index 00000000000..8e3fc55ae39
--- /dev/null
+++ b/drivers/clk/microchip/mpfs_clk.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2020 Microchip Technology Inc.
+ * Padmarao Begari <padmarao.begari@microchip.com>
+ */
+#ifndef __MICROCHIP_MPFS_CLK_H
+#define __MICROCHIP_MPFS_CLK_H
+
+#include <linux/clk-provider.h>
+/**
+ * mpfs_clk_register_cfgs() - register configuration clocks
+ *
+ * @base: base address of the mpfs system register.
+ * @clk_rate: the mpfs pll clock rate.
+ * @parent_name: a pointer to parent clock name.
+ * @return zero on success, or a negative error code.
+ */
+int mpfs_clk_register_cfgs(void __iomem *base, u32 clk_rate,
+			   const char *parent_name);
+/**
+ * mpfs_clk_register_periphs() - register peripheral clocks
+ *
+ * @base: base address of the mpfs system register.
+ * @clk_rate: the mpfs pll clock rate.
+ * @parent_name: a pointer to parent clock name.
+ * @return zero on success, or a negative error code.
+ */
+int mpfs_clk_register_periphs(void __iomem *base, u32 clk_rate,
+			      const char *parent_name);
+/**
+ * divider_get_val() - get the clock divider value
+ *
+ * @rate: requested clock rate.
+ * @parent_rate: parent clock rate.
+ * @table: a pointer to clock divider table.
+ * @width: width of the divider bit field.
+ * @flags: common clock framework flags.
+ * @return divider value on success, or a negative error code.
+ */
+int divider_get_val(unsigned long rate, unsigned long parent_rate,
+		    const struct clk_div_table *table,
+		    u8 width, unsigned long flags);
+
+#endif	/* __MICROCHIP_MPFS_CLK_H */