clk: sifive: Factor-out PLL library as separate module
To match SiFive clock driver with latest Linux, we factor-out PLL
library as separate module under drivers/clk/analogbits.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 96969b9..7b81eac 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -98,6 +98,7 @@
Enable the STM32 clock (RCC) driver. Enable support for
manipulating STM32MP1's on-SoC clocks.
+source "drivers/clk/analogbits/Kconfig"
source "drivers/clk/at91/Kconfig"
source "drivers/clk/exynos/Kconfig"
source "drivers/clk/imx/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 719b9b8..f0ced49 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -8,6 +8,7 @@
obj-$(CONFIG_$(SPL_TPL_)CLK) += clk_fixed_rate.o
obj-$(CONFIG_$(SPL_TPL_)CLK) += clk_fixed_factor.o
+obj-y += analogbits/
obj-y += imx/
obj-y += tegra/
obj-$(CONFIG_ARCH_ASPEED) += aspeed/
diff --git a/drivers/clk/analogbits/Kconfig b/drivers/clk/analogbits/Kconfig
new file mode 100644
index 0000000..1d25e6f
--- /dev/null
+++ b/drivers/clk/analogbits/Kconfig
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config CLK_ANALOGBITS_WRPLL_CLN28HPC
+ bool
diff --git a/drivers/clk/analogbits/Makefile b/drivers/clk/analogbits/Makefile
new file mode 100644
index 0000000..ec1bb40
--- /dev/null
+++ b/drivers/clk/analogbits/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-$(CONFIG_CLK_ANALOGBITS_WRPLL_CLN28HPC) += wrpll-cln28hpc.o
diff --git a/drivers/clk/sifive/wrpll-cln28hpc.c b/drivers/clk/analogbits/wrpll-cln28hpc.c
similarity index 99%
rename from drivers/clk/sifive/wrpll-cln28hpc.c
rename to drivers/clk/analogbits/wrpll-cln28hpc.c
index d377849..68eb114 100644
--- a/drivers/clk/sifive/wrpll-cln28hpc.c
+++ b/drivers/clk/analogbits/wrpll-cln28hpc.c
@@ -35,8 +35,7 @@
#include <linux/err.h>
#include <linux/log2.h>
#include <linux/math64.h>
-
-#include "analogbits-wrpll-cln28hpc.h"
+#include <linux/clk/analogbits-wrpll-cln28hpc.h>
/* MIN_INPUT_FREQ: minimum input clock frequency, in Hz (Fref_min) */
#define MIN_INPUT_FREQ 7000000
diff --git a/drivers/clk/sifive/Kconfig b/drivers/clk/sifive/Kconfig
index 644881b..d90be19 100644
--- a/drivers/clk/sifive/Kconfig
+++ b/drivers/clk/sifive/Kconfig
@@ -1,8 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-config CLK_ANALOGBITS_WRPLL_CLN28HPC
- bool
-
config CLK_SIFIVE
bool "SiFive SoC driver support"
depends on CLK
diff --git a/drivers/clk/sifive/Makefile b/drivers/clk/sifive/Makefile
index f8263e7..0813360 100644
--- a/drivers/clk/sifive/Makefile
+++ b/drivers/clk/sifive/Makefile
@@ -1,7 +1,5 @@
# SPDX-License-Identifier: GPL-2.0+
-obj-$(CONFIG_CLK_ANALOGBITS_WRPLL_CLN28HPC) += wrpll-cln28hpc.o
-
obj-$(CONFIG_CLK_SIFIVE_FU540_PRCI) += fu540-prci.o
obj-$(CONFIG_CLK_SIFIVE_GEMGXL_MGMT) += gemgxl-mgmt.o
diff --git a/drivers/clk/sifive/analogbits-wrpll-cln28hpc.h b/drivers/clk/sifive/analogbits-wrpll-cln28hpc.h
deleted file mode 100644
index 4432e24..0000000
--- a/drivers/clk/sifive/analogbits-wrpll-cln28hpc.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Copyright (C) 2018 SiFive, Inc.
- * Wesley Terpstra
- * Paul Walmsley
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#ifndef __LINUX_CLK_ANALOGBITS_WRPLL_CLN28HPC_H
-#define __LINUX_CLK_ANALOGBITS_WRPLL_CLN28HPC_H
-
-#include <linux/types.h>
-
-/* DIVQ_VALUES: number of valid DIVQ values */
-#define DIVQ_VALUES 6
-
-/*
- * Bit definitions for struct analogbits_wrpll_cfg.flags
- *
- * WRPLL_FLAGS_BYPASS_FLAG: if set, the PLL is either in bypass, or should be
- * programmed to enter bypass
- * WRPLL_FLAGS_RESET_FLAG: if set, the PLL is in reset
- * WRPLL_FLAGS_INT_FEEDBACK_FLAG: if set, the PLL is configured for internal
- * feedback mode
- * WRPLL_FLAGS_EXT_FEEDBACK_FLAG: if set, the PLL is configured for external
- * feedback mode (not yet supported by this driver)
- *
- * The flags WRPLL_FLAGS_INT_FEEDBACK_FLAG and WRPLL_FLAGS_EXT_FEEDBACK_FLAG are
- * mutually exclusive. If both bits are set, or both are zero, the struct
- * analogbits_wrpll_cfg record is uninitialized or corrupt.
- */
-#define WRPLL_FLAGS_BYPASS_SHIFT 0
-#define WRPLL_FLAGS_BYPASS_MASK BIT(WRPLL_FLAGS_BYPASS_SHIFT)
-#define WRPLL_FLAGS_RESET_SHIFT 1
-#define WRPLL_FLAGS_RESET_MASK BIT(WRPLL_FLAGS_RESET_SHIFT)
-#define WRPLL_FLAGS_INT_FEEDBACK_SHIFT 2
-#define WRPLL_FLAGS_INT_FEEDBACK_MASK BIT(WRPLL_FLAGS_INT_FEEDBACK_SHIFT)
-#define WRPLL_FLAGS_EXT_FEEDBACK_SHIFT 3
-#define WRPLL_FLAGS_EXT_FEEDBACK_MASK BIT(WRPLL_FLAGS_EXT_FEEDBACK_SHIFT)
-
-/**
- * struct analogbits_wrpll_cfg - WRPLL configuration values
- * @divr: reference divider value (6 bits), as presented to the PLL signals.
- * @divf: feedback divider value (9 bits), as presented to the PLL signals.
- * @divq: output divider value (3 bits), as presented to the PLL signals.
- * @flags: PLL configuration flags. See above for more information.
- * @range: PLL loop filter range. See below for more information.
- * @_output_rate_cache: cached output rates, swept across DIVQ.
- * @_parent_rate: PLL refclk rate for which values are valid
- * @_max_r: maximum possible R divider value, given @parent_rate
- * @_init_r: initial R divider value to start the search from
- *
- * @divr, @divq, @divq, @range represent what the PLL expects to see
- * on its input signals. Thus @divr and @divf are the actual divisors
- * minus one. @divq is a power-of-two divider; for example, 1 =
- * divide-by-2 and 6 = divide-by-64. 0 is an invalid @divq value.
- *
- * When initially passing a struct analogbits_wrpll_cfg record, the
- * record should be zero-initialized with the exception of the @flags
- * field. The only flag bits that need to be set are either
- * WRPLL_FLAGS_INT_FEEDBACK or WRPLL_FLAGS_EXT_FEEDBACK.
- *
- * Field names beginning with an underscore should be considered
- * private to the wrpll-cln28hpc.c code.
- */
-struct analogbits_wrpll_cfg {
- u8 divr;
- u8 divq;
- u8 range;
- u8 flags;
- u16 divf;
- u32 _output_rate_cache[DIVQ_VALUES];
- unsigned long _parent_rate;
- u8 _max_r;
- u8 _init_r;
-};
-
-/*
- * Function prototypes
- */
-
-int analogbits_wrpll_configure_for_rate(struct analogbits_wrpll_cfg *c,
- u32 target_rate,
- unsigned long parent_rate);
-
-unsigned int analogbits_wrpll_calc_max_lock_us(struct analogbits_wrpll_cfg *c);
-
-unsigned long analogbits_wrpll_calc_output_rate(struct analogbits_wrpll_cfg *c,
- unsigned long parent_rate);
-
-#endif /* __LINUX_CLK_ANALOGBITS_WRPLL_CLN28HPC_H */
diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
index 2d47ebc..56084db 100644
--- a/drivers/clk/sifive/fu540-prci.c
+++ b/drivers/clk/sifive/fu540-prci.c
@@ -37,10 +37,9 @@
#include <errno.h>
#include <linux/math64.h>
+#include <linux/clk/analogbits-wrpll-cln28hpc.h>
#include <dt-bindings/clk/sifive-fu540-prci.h>
-#include "analogbits-wrpll-cln28hpc.h"
-
/*
* EXPECTED_CLK_PARENT_COUNT: how many parent clocks this driver expects:
* hfclk and rtcclk