clk: sifive: Move all stuff into SoCs header files from C files

Improve PRCI driver to reduce the complexity, we remove the SoCs C files
by putting all stuff in each SoCs header files, and include these
SoCs-specific header files in core of PRCI. It can also avoid the W=1
kernel build warnings about variable defined but not used
[-Wunused-const-variable=], like commit 487dc7b ("clk: sifive:
fu540-prci: Declare static const variable 'prci_clk_fu540' where it's
used") does.

Signed-off-by: Zong Li <zong.li@sifive.com>
Suggested-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/a3c7ec5c46c1d8be455d1c347db4855bb56cec53.1646388139.git.zong.li@sifive.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/sifive/Makefile

@@ -1,2 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_CLK_SIFIVE_PRCI)	+= sifive-prci.o fu540-prci.o fu740-prci.o
+obj-$(CONFIG_CLK_SIFIVE_PRCI)	+= sifive-prci.o

drivers/clk/sifive/fu540-prci.h

@@ -1,16 +1,99 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (C) 2020 SiFive, Inc.
- * Zong Li
+ * Copyright (C) 2018-2021 SiFive, Inc.
+ * Copyright (C) 2018-2019 Wesley Terpstra
+ * Copyright (C) 2018-2019 Paul Walmsley
+ * Copyright (C) 2020-2021 Zong Li
+ *
+ * The FU540 PRCI implements clock and reset control for the SiFive
+ * FU540-C000 chip.  This driver assumes that it has sole control
+ * over all PRCI resources.
+ *
+ * This driver is based on the PRCI driver written by Wesley Terpstra:
+ * https://github.com/riscv/riscv-linux/commit/999529edf517ed75b56659d456d221b2ee56bb60
+ *
+ * References:
+ * - SiFive FU540-C000 manual v1p0, Chapter 7 "Clocking and Reset"
  */
 
 #ifndef __SIFIVE_CLK_FU540_PRCI_H
 #define __SIFIVE_CLK_FU540_PRCI_H
 
+
+#include <linux/module.h>
+
+#include <dt-bindings/clock/sifive-fu540-prci.h>
+
 #include "sifive-prci.h"
 
-#define NUM_CLOCK_FU540	4
+/* PRCI integration data for each WRPLL instance */
+
+static struct __prci_wrpll_data sifive_fu540_prci_corepll_data = {
+	.cfg0_offs = PRCI_COREPLLCFG0_OFFSET,
+	.cfg1_offs = PRCI_COREPLLCFG1_OFFSET,
+	.enable_bypass = sifive_prci_coreclksel_use_hfclk,
+	.disable_bypass = sifive_prci_coreclksel_use_corepll,
+};
+
+static struct __prci_wrpll_data sifive_fu540_prci_ddrpll_data = {
+	.cfg0_offs = PRCI_DDRPLLCFG0_OFFSET,
+	.cfg1_offs = PRCI_DDRPLLCFG1_OFFSET,
+};
+
+static struct __prci_wrpll_data sifive_fu540_prci_gemgxlpll_data = {
+	.cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET,
+	.cfg1_offs = PRCI_GEMGXLPLLCFG1_OFFSET,
+};
+
+/* Linux clock framework integration */
+
+static const struct clk_ops sifive_fu540_prci_wrpll_clk_ops = {
+	.set_rate = sifive_prci_wrpll_set_rate,
+	.round_rate = sifive_prci_wrpll_round_rate,
+	.recalc_rate = sifive_prci_wrpll_recalc_rate,
+	.enable = sifive_prci_clock_enable,
+	.disable = sifive_prci_clock_disable,
+	.is_enabled = sifive_clk_is_enabled,
+};
+
+static const struct clk_ops sifive_fu540_prci_wrpll_ro_clk_ops = {
+	.recalc_rate = sifive_prci_wrpll_recalc_rate,
+};
+
+static const struct clk_ops sifive_fu540_prci_tlclksel_clk_ops = {
+	.recalc_rate = sifive_prci_tlclksel_recalc_rate,
+};
+
+/* List of clock controls provided by the PRCI */
+static struct __prci_clock __prci_init_clocks_fu540[] = {
+	[FU540_PRCI_CLK_COREPLL] = {
+		.name = "corepll",
+		.parent_name = "hfclk",
+		.ops = &sifive_fu540_prci_wrpll_clk_ops,
+		.pwd = &sifive_fu540_prci_corepll_data,
+	},
+	[FU540_PRCI_CLK_DDRPLL] = {
+		.name = "ddrpll",
+		.parent_name = "hfclk",
+		.ops = &sifive_fu540_prci_wrpll_ro_clk_ops,
+		.pwd = &sifive_fu540_prci_ddrpll_data,
+	},
+	[FU540_PRCI_CLK_GEMGXLPLL] = {
+		.name = "gemgxlpll",
+		.parent_name = "hfclk",
+		.ops = &sifive_fu540_prci_wrpll_clk_ops,
+		.pwd = &sifive_fu540_prci_gemgxlpll_data,
+	},
+	[FU540_PRCI_CLK_TLCLK] = {
+		.name = "tlclk",
+		.parent_name = "corepll",
+		.ops = &sifive_fu540_prci_tlclksel_clk_ops,
+	},
+};
 
-extern struct __prci_clock __prci_init_clocks_fu540[NUM_CLOCK_FU540];
+static const struct prci_clk_desc prci_clk_fu540 = {
+	.clks = __prci_init_clocks_fu540,
+	.num_clks = ARRAY_SIZE(__prci_init_clocks_fu540),
+};
 
 #endif /* __SIFIVE_CLK_FU540_PRCI_H */