Re: [PATCH v3 1/3] clk: sifive: Extract prci core to common base
From: Zong Li
Date: Wed Nov 11 2020 - 04:56:48 EST
On Wed, Nov 11, 2020 at 5:51 PM Pragnesh Patel
<pragnesh.patel@xxxxxxxxxxxx> wrote:
>
> Hi Zong,
>
> >-----Original Message-----
> >From: Zong Li <zong.li@xxxxxxxxxx>
> >Sent: 11 November 2020 15:05
> >To: Paul Walmsley ( Sifive) <paul.walmsley@xxxxxxxxxx>; palmer@xxxxxxxxxxx;
> >sboyd@xxxxxxxxxx; schwab@xxxxxxxxxxxxxx; Pragnesh Patel
> ><pragnesh.patel@xxxxxxxxxxxx>; aou@xxxxxxxxxxxxxxxxx;
> >mturquette@xxxxxxxxxxxx; Yash Shah <yash.shah@xxxxxxxxxxxx>; linux-
> >kernel@xxxxxxxxxxxxxxx; linux-clk@xxxxxxxxxxxxxxx; linux-
> >riscv@xxxxxxxxxxxxxxxxxxx
> >Cc: Zong Li <zong.li@xxxxxxxxxx>
> >Subject: [PATCH v3 1/3] clk: sifive: Extract prci core to common base
> >
> >Extract common core of prci driver to an independent file, it could allow other
> >chips to reuse it. Separate SoCs-dependent code 'fu540'
> >from prci core, then we can easily add 'fu740' later.
> >
> >Almost these changes are code movement. The different is adding the private
> >data for each SoC use, so it needs to get match data in probe callback function,
> >then use the data for initialization.
> >
> >Signed-off-by: Zong Li <zong.li@xxxxxxxxxx>
> >---
> > drivers/clk/sifive/Makefile | 2 +
> > drivers/clk/sifive/fu540-prci.c | 586 +-----------------
> > drivers/clk/sifive/fu540-prci.h | 21 +
> > .../sifive/{fu540-prci.c => sifive-prci.c} | 381 +++---------
> > drivers/clk/sifive/sifive-prci.h | 201 ++++++
> > 5 files changed, 323 insertions(+), 868 deletions(-) create mode 100644
> >drivers/clk/sifive/fu540-prci.h copy drivers/clk/sifive/{fu540-prci.c => sifive-
> >prci.c} (45%) create mode 100644 drivers/clk/sifive/sifive-prci.h
> >
> >diff --git a/drivers/clk/sifive/Makefile b/drivers/clk/sifive/Makefile index
> >0797f14fef6b..627effe2ece1 100644
> >--- a/drivers/clk/sifive/Makefile
> >+++ b/drivers/clk/sifive/Makefile
> >@@ -1,2 +1,4 @@
> > # SPDX-License-Identifier: GPL-2.0-only
> >+obj-y += sifive-prci.o
> >+
> > obj-$(CONFIG_CLK_SIFIVE_FU540_PRCI) += fu540-prci.o
> >diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c index
> >a8901f90a61a..840b97bfff85 100644
> >--- a/drivers/clk/sifive/fu540-prci.c
> >+++ b/drivers/clk/sifive/fu540-prci.c
> >@@ -3,6 +3,7 @@
> > * Copyright (C) 2018-2019 SiFive, Inc.
> > * Wesley Terpstra
> > * Paul Walmsley
> >+ * Zong Li
> > *
> > * 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 @@ -
> >13,475 +14,48 @@
> > * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> > * GNU General Public License for more details.
> > *
> >- * 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"
> > */
> >
> > #include <dt-bindings/clock/sifive-fu540-prci.h>
> >-#include <linux/clkdev.h>
> >-#include <linux/clk-provider.h>
> >-#include <linux/clk/analogbits-wrpll-cln28hpc.h>
> >-#include <linux/delay.h>
> >-#include <linux/err.h>
> >-#include <linux/io.h>
> > #include <linux/module.h>
> >-#include <linux/of.h>
> >-#include <linux/of_clk.h>
> >-#include <linux/platform_device.h>
> >-#include <linux/slab.h>
> >-
> >-/*
> >- * EXPECTED_CLK_PARENT_COUNT: how many parent clocks this driver expects:
> >- * hfclk and rtcclk
> >- */
> >-#define EXPECTED_CLK_PARENT_COUNT 2
> >-
> >-/*
> >- * Register offsets and bitmasks
> >- */
> >-
> >-/* COREPLLCFG0 */
> >-#define PRCI_COREPLLCFG0_OFFSET 0x4
> >-# define PRCI_COREPLLCFG0_DIVR_SHIFT 0
> >-# define PRCI_COREPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_COREPLLCFG0_DIVR_SHIFT)
> >-# define PRCI_COREPLLCFG0_DIVF_SHIFT 6
> >-# define PRCI_COREPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_COREPLLCFG0_DIVF_SHIFT)
> >-# define PRCI_COREPLLCFG0_DIVQ_SHIFT 15
> >-# define PRCI_COREPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_COREPLLCFG0_DIVQ_SHIFT)
> >-# define PRCI_COREPLLCFG0_RANGE_SHIFT 18
> >-# define PRCI_COREPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_COREPLLCFG0_RANGE_SHIFT)
> >-# define PRCI_COREPLLCFG0_BYPASS_SHIFT 24
> >-# define PRCI_COREPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_COREPLLCFG0_BYPASS_SHIFT)
> >-# define PRCI_COREPLLCFG0_FSE_SHIFT 25
> >-# define PRCI_COREPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_COREPLLCFG0_FSE_SHIFT)
> >-# define PRCI_COREPLLCFG0_LOCK_SHIFT 31
> >-# define PRCI_COREPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_COREPLLCFG0_LOCK_SHIFT)
> >-
> >-/* DDRPLLCFG0 */
> >-#define PRCI_DDRPLLCFG0_OFFSET 0xc
> >-# define PRCI_DDRPLLCFG0_DIVR_SHIFT 0
> >-# define PRCI_DDRPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_DDRPLLCFG0_DIVR_SHIFT)
> >-# define PRCI_DDRPLLCFG0_DIVF_SHIFT 6
> >-# define PRCI_DDRPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_DDRPLLCFG0_DIVF_SHIFT)
> >-# define PRCI_DDRPLLCFG0_DIVQ_SHIFT 15
> >-# define PRCI_DDRPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_DDRPLLCFG0_DIVQ_SHIFT)
> >-# define PRCI_DDRPLLCFG0_RANGE_SHIFT 18
> >-# define PRCI_DDRPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_DDRPLLCFG0_RANGE_SHIFT)
> >-# define PRCI_DDRPLLCFG0_BYPASS_SHIFT 24
> >-# define PRCI_DDRPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_BYPASS_SHIFT)
> >-# define PRCI_DDRPLLCFG0_FSE_SHIFT 25
> >-# define PRCI_DDRPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_FSE_SHIFT)
> >-# define PRCI_DDRPLLCFG0_LOCK_SHIFT 31
> >-# define PRCI_DDRPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_LOCK_SHIFT)
> >+#include "sifive-prci.h"
> >
> >-/* DDRPLLCFG1 */
> >-#define PRCI_DDRPLLCFG1_OFFSET 0x10
> >-# define PRCI_DDRPLLCFG1_CKE_SHIFT 24
> >-# define PRCI_DDRPLLCFG1_CKE_MASK (0x1 <<
> >PRCI_DDRPLLCFG1_CKE_SHIFT)
> >+/* PRCI integration data for each WRPLL instance */
> >
> >-/* GEMGXLPLLCFG0 */
> >-#define PRCI_GEMGXLPLLCFG0_OFFSET 0x1c
> >-# define PRCI_GEMGXLPLLCFG0_DIVR_SHIFT 0
> >-# define PRCI_GEMGXLPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_GEMGXLPLLCFG0_DIVR_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_DIVF_SHIFT 6
> >-# define PRCI_GEMGXLPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_GEMGXLPLLCFG0_DIVF_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT 15
> >-# define PRCI_GEMGXLPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_RANGE_SHIFT 18
> >-# define PRCI_GEMGXLPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_GEMGXLPLLCFG0_RANGE_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT 24
> >-# define PRCI_GEMGXLPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_FSE_SHIFT 25
> >-# define PRCI_GEMGXLPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_FSE_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_LOCK_SHIFT 31
> >-# define PRCI_GEMGXLPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_LOCK_SHIFT)
> >-
> >-/* GEMGXLPLLCFG1 */
> >-#define PRCI_GEMGXLPLLCFG1_OFFSET 0x20
> >-# define PRCI_GEMGXLPLLCFG1_CKE_SHIFT 24
> >-# define PRCI_GEMGXLPLLCFG1_CKE_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG1_CKE_SHIFT)
> >-
> >-/* CORECLKSEL */
> >-#define PRCI_CORECLKSEL_OFFSET 0x24
> >-# define PRCI_CORECLKSEL_CORECLKSEL_SHIFT 0
> >-# define PRCI_CORECLKSEL_CORECLKSEL_MASK (0x1 <<
> >PRCI_CORECLKSEL_CORECLKSEL_SHIFT)
> >-
> >-/* DEVICESRESETREG */
> >-#define PRCI_DEVICESRESETREG_OFFSET 0x28
> >-# define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT 0
> >-# define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT 1
> >-# define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT 2
> >-# define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT 3
> >-# define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT 5
> >-# define PRCI_DEVICESRESETREG_GEMGXL_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT)
> >-
> >-/* CLKMUXSTATUSREG */
> >-#define PRCI_CLKMUXSTATUSREG_OFFSET 0x2c
> >-# define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT 1
> >-# define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK (0x1 <<
> >PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT)
> >-
> >-/*
> >- * Private structures
> >- */
> >-
> >-/**
> >- * struct __prci_data - per-device-instance data
> >- * @va: base virtual address of the PRCI IP block
> >- * @hw_clks: encapsulates struct clk_hw records
> >- *
> >- * PRCI per-device instance data
> >- */
> >-struct __prci_data {
> >- void __iomem *va;
> >- struct clk_hw_onecell_data hw_clks;
> >+static struct __prci_wrpll_data __prci_corepll_data = {
> >+ .cfg0_offs = PRCI_COREPLLCFG0_OFFSET,
> >+ .enable_bypass = sifive_prci_coreclksel_use_hfclk,
> >+ .disable_bypass = sifive_prci_coreclksel_use_corepll,
> > };
> >
> >-/**
> >- * struct __prci_wrpll_data - WRPLL configuration and integration data
> >- * @c: WRPLL current configuration record
> >- * @enable_bypass: fn ptr to code to bypass the WRPLL (if applicable; else
> >NULL)
> >- * @disable_bypass: fn ptr to code to not bypass the WRPLL (or NULL)
> >- * @cfg0_offs: WRPLL CFG0 register offset (in bytes) from the PRCI base address
> >- *
> >- * @enable_bypass and @disable_bypass are used for WRPLL instances
> >- * that contain a separate external glitchless clock mux downstream
> >- * from the PLL. The WRPLL internal bypass mux is not glitchless.
> >- */
> >-struct __prci_wrpll_data {
> >- struct wrpll_cfg c;
> >- void (*enable_bypass)(struct __prci_data *pd);
> >- void (*disable_bypass)(struct __prci_data *pd);
> >- u8 cfg0_offs;
> >+static struct __prci_wrpll_data __prci_ddrpll_data = {
> >+ .cfg0_offs = PRCI_DDRPLLCFG0_OFFSET,
> > };
> >
> >-/**
> >- * struct __prci_clock - describes a clock device managed by PRCI
> >- * @name: user-readable clock name string - should match the manual
> >- * @parent_name: parent name for this clock
> >- * @ops: struct clk_ops for the Linux clock framework to use for control
> >- * @hw: Linux-private clock data
> >- * @pwd: WRPLL-specific data, associated with this clock (if not NULL)
> >- * @pd: PRCI-specific data associated with this clock (if not NULL)
> >- *
> >- * PRCI clock data. Used by the PRCI driver to register PRCI-provided
> >- * clocks to the Linux clock infrastructure.
> >- */
> >-struct __prci_clock {
> >- const char *name;
> >- const char *parent_name;
> >- const struct clk_ops *ops;
> >- struct clk_hw hw;
> >- struct __prci_wrpll_data *pwd;
> >- struct __prci_data *pd;
> >+static struct __prci_wrpll_data __prci_gemgxlpll_data = {
> >+ .cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET,
> > };
> >
> >-#define clk_hw_to_prci_clock(pwd) container_of(pwd, struct __prci_clock, hw)
> >-
> >-/*
> >- * Private functions
> >- */
> >-
> >-/**
> >- * __prci_readl() - read from a PRCI register
> >- * @pd: PRCI context
> >- * @offs: register offset to read from (in bytes, from PRCI base address)
> >- *
> >- * Read the register located at offset @offs from the base virtual
> >- * address of the PRCI register target described by @pd, and return
> >- * the value to the caller.
> >- *
> >- * Context: Any context.
> >- *
> >- * Return: the contents of the register described by @pd and @offs.
> >- */
> >-static u32 __prci_readl(struct __prci_data *pd, u32 offs) -{
> >- return readl_relaxed(pd->va + offs);
> >-}
> >-
> >-static void __prci_writel(u32 v, u32 offs, struct __prci_data *pd) -{
> >- writel_relaxed(v, pd->va + offs);
> >-}
> >-
> >-/* WRPLL-related private functions */
> >-
> >-/**
> >- * __prci_wrpll_unpack() - unpack WRPLL configuration registers into
> >parameters
> >- * @c: ptr to a struct wrpll_cfg record to write config into
> >- * @r: value read from the PRCI PLL configuration register
> >- *
> >- * Given a value @r read from an FU540 PRCI PLL configuration register,
> >- * split it into fields and populate it into the WRPLL configuration record
> >- * pointed to by @c.
> >- *
> >- * The COREPLLCFG0 macros are used below, but the other *PLLCFG0 macros
> >- * have the same register layout.
> >- *
> >- * Context: Any context.
> >- */
> >-static void __prci_wrpll_unpack(struct wrpll_cfg *c, u32 r) -{
> >- u32 v;
> >-
> >- v = r & PRCI_COREPLLCFG0_DIVR_MASK;
> >- v >>= PRCI_COREPLLCFG0_DIVR_SHIFT;
> >- c->divr = v;
> >-
> >- v = r & PRCI_COREPLLCFG0_DIVF_MASK;
> >- v >>= PRCI_COREPLLCFG0_DIVF_SHIFT;
> >- c->divf = v;
> >-
> >- v = r & PRCI_COREPLLCFG0_DIVQ_MASK;
> >- v >>= PRCI_COREPLLCFG0_DIVQ_SHIFT;
> >- c->divq = v;
> >-
> >- v = r & PRCI_COREPLLCFG0_RANGE_MASK;
> >- v >>= PRCI_COREPLLCFG0_RANGE_SHIFT;
> >- c->range = v;
> >-
> >- c->flags &= (WRPLL_FLAGS_INT_FEEDBACK_MASK |
> >- WRPLL_FLAGS_EXT_FEEDBACK_MASK);
> >-
> >- /* external feedback mode not supported */
> >- c->flags |= WRPLL_FLAGS_INT_FEEDBACK_MASK;
> >-}
> >-
> >-/**
> >- * __prci_wrpll_pack() - pack PLL configuration parameters into a register value
> >- * @c: pointer to a struct wrpll_cfg record containing the PLL's cfg
> >- *
> >- * Using a set of WRPLL configuration values pointed to by @c,
> >- * assemble a PRCI PLL configuration register value, and return it to
> >- * the caller.
> >- *
> >- * Context: Any context. Caller must ensure that the contents of the
> >- * record pointed to by @c do not change during the execution
> >- * of this function.
> >- *
> >- * Returns: a value suitable for writing into a PRCI PLL configuration
> >- * register
> >- */
> >-static u32 __prci_wrpll_pack(const struct wrpll_cfg *c) -{
> >- u32 r = 0;
> >-
> >- r |= c->divr << PRCI_COREPLLCFG0_DIVR_SHIFT;
> >- r |= c->divf << PRCI_COREPLLCFG0_DIVF_SHIFT;
> >- r |= c->divq << PRCI_COREPLLCFG0_DIVQ_SHIFT;
> >- r |= c->range << PRCI_COREPLLCFG0_RANGE_SHIFT;
> >-
> >- /* external feedback mode not supported */
> >- r |= PRCI_COREPLLCFG0_FSE_MASK;
> >-
> >- return r;
> >-}
> >-
> >-/**
> >- * __prci_wrpll_read_cfg() - read the WRPLL configuration from the PRCI
> >- * @pd: PRCI context
> >- * @pwd: PRCI WRPLL metadata
> >- *
> >- * Read the current configuration of the PLL identified by @pwd from
> >- * the PRCI identified by @pd, and store it into the local configuration
> >- * cache in @pwd.
> >- *
> >- * Context: Any context. Caller must prevent the records pointed to by
> >- * @pd and @pwd from changing during execution.
> >- */
> >-static void __prci_wrpll_read_cfg(struct __prci_data *pd,
> >- struct __prci_wrpll_data *pwd)
> >-{
> >- __prci_wrpll_unpack(&pwd->c, __prci_readl(pd, pwd->cfg0_offs));
> >-}
> >-
> >-/**
> >- * __prci_wrpll_write_cfg() - write WRPLL configuration into the PRCI
> >- * @pd: PRCI context
> >- * @pwd: PRCI WRPLL metadata
> >- * @c: WRPLL configuration record to write
> >- *
> >- * Write the WRPLL configuration described by @c into the WRPLL
> >- * configuration register identified by @pwd in the PRCI instance
> >- * described by @c. Make a cached copy of the WRPLL's current
> >- * configuration so it can be used by other code.
> >- *
> >- * Context: Any context. Caller must prevent the records pointed to by
> >- * @pd and @pwd from changing during execution.
> >- */
> >-static void __prci_wrpll_write_cfg(struct __prci_data *pd,
> >- struct __prci_wrpll_data *pwd,
> >- struct wrpll_cfg *c)
> >-{
> >- __prci_writel(__prci_wrpll_pack(c), pwd->cfg0_offs, pd);
> >-
> >- memcpy(&pwd->c, c, sizeof(*c));
> >-}
> >-
> >-/* Core clock mux control */
> >-
> >-/**
> >- * __prci_coreclksel_use_hfclk() - switch the CORECLK mux to output HFCLK
> >- * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg
> >- *
> >- * Switch the CORECLK mux to the HFCLK input source; return once complete.
> >- *
> >- * Context: Any context. Caller must prevent concurrent changes to the
> >- * PRCI_CORECLKSEL_OFFSET register.
> >- */
> >-static void __prci_coreclksel_use_hfclk(struct __prci_data *pd) -{
> >- u32 r;
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET);
> >- r |= PRCI_CORECLKSEL_CORECLKSEL_MASK;
> >- __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd);
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */
> >-}
> >-
> >-/**
> >- * __prci_coreclksel_use_corepll() - switch the CORECLK mux to output COREPLL
> >- * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg
> >- *
> >- * Switch the CORECLK mux to the PLL output clock; return once complete.
> >- *
> >- * Context: Any context. Caller must prevent concurrent changes to the
> >- * PRCI_CORECLKSEL_OFFSET register.
> >- */
> >-static void __prci_coreclksel_use_corepll(struct __prci_data *pd) -{
> >- u32 r;
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET);
> >- r &= ~PRCI_CORECLKSEL_CORECLKSEL_MASK;
> >- __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd);
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */
> >-}
> >-
> >-/*
> >- * Linux clock framework integration
> >- *
> >- * See the Linux clock framework documentation for more information on
> >- * these functions.
> >- */
> >-
> >-static unsigned long sifive_fu540_prci_wrpll_recalc_rate(struct clk_hw *hw,
> >- unsigned long parent_rate)
> >-{
> >- struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> >- struct __prci_wrpll_data *pwd = pc->pwd;
> >-
> >- return wrpll_calc_output_rate(&pwd->c, parent_rate);
> >-}
> >-
> >-static long sifive_fu540_prci_wrpll_round_rate(struct clk_hw *hw,
> >- unsigned long rate,
> >- unsigned long *parent_rate)
> >-{
> >- struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> >- struct __prci_wrpll_data *pwd = pc->pwd;
> >- struct wrpll_cfg c;
> >-
> >- memcpy(&c, &pwd->c, sizeof(c));
> >-
> >- wrpll_configure_for_rate(&c, rate, *parent_rate);
> >-
> >- return wrpll_calc_output_rate(&c, *parent_rate);
> >-}
> >-
> >-static int sifive_fu540_prci_wrpll_set_rate(struct clk_hw *hw,
> >- unsigned long rate,
> >- unsigned long parent_rate)
> >-{
> >- struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> >- struct __prci_wrpll_data *pwd = pc->pwd;
> >- struct __prci_data *pd = pc->pd;
> >- int r;
> >-
> >- r = wrpll_configure_for_rate(&pwd->c, rate, parent_rate);
> >- if (r)
> >- return r;
> >-
> >- if (pwd->enable_bypass)
> >- pwd->enable_bypass(pd);
> >-
> >- __prci_wrpll_write_cfg(pd, pwd, &pwd->c);
> >-
> >- udelay(wrpll_calc_max_lock_us(&pwd->c));
> >-
> >- if (pwd->disable_bypass)
> >- pwd->disable_bypass(pd);
> >-
> >- return 0;
> >-}
> >+/* Linux clock framework integration */
> >
> > static const struct clk_ops sifive_fu540_prci_wrpll_clk_ops = {
> >- .set_rate = sifive_fu540_prci_wrpll_set_rate,
> >- .round_rate = sifive_fu540_prci_wrpll_round_rate,
> >- .recalc_rate = sifive_fu540_prci_wrpll_recalc_rate,
> >+ .set_rate = sifive_prci_wrpll_set_rate,
> >+ .round_rate = sifive_prci_wrpll_round_rate,
> >+ .recalc_rate = sifive_prci_wrpll_recalc_rate,
> > };
> >
> > static const struct clk_ops sifive_fu540_prci_wrpll_ro_clk_ops = {
> >- .recalc_rate = sifive_fu540_prci_wrpll_recalc_rate,
> >+ .recalc_rate = sifive_prci_wrpll_recalc_rate,
> > };
> >
> >-/* TLCLKSEL clock integration */
> >-
> >-static unsigned long sifive_fu540_prci_tlclksel_recalc_rate(struct clk_hw *hw,
> >- unsigned long parent_rate)
> >-{
> >- struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> >- struct __prci_data *pd = pc->pd;
> >- u32 v;
> >- u8 div;
> >-
> >- v = __prci_readl(pd, PRCI_CLKMUXSTATUSREG_OFFSET);
> >- v &= PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK;
> >- div = v ? 1 : 2;
> >-
> >- return div_u64(parent_rate, div);
> >-}
> >-
> > static const struct clk_ops sifive_fu540_prci_tlclksel_clk_ops = {
> >- .recalc_rate = sifive_fu540_prci_tlclksel_recalc_rate,
> >-};
> >-
> >-/*
> >- * PRCI integration data for each WRPLL instance
> >- */
> >-
> >-static struct __prci_wrpll_data __prci_corepll_data = {
> >- .cfg0_offs = PRCI_COREPLLCFG0_OFFSET,
> >- .enable_bypass = __prci_coreclksel_use_hfclk,
> >- .disable_bypass = __prci_coreclksel_use_corepll,
> >-};
> >-
> >-static struct __prci_wrpll_data __prci_ddrpll_data = {
> >- .cfg0_offs = PRCI_DDRPLLCFG0_OFFSET,
> >+ .recalc_rate = sifive_prci_tlclksel_recalc_rate,
> > };
> >
> >-static struct __prci_wrpll_data __prci_gemgxlpll_data = {
> >- .cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET,
> >-};
> >-
> >-/*
> >- * List of clock controls provided by the PRCI
> >- */
> >-
> >-static struct __prci_clock __prci_init_clocks[] = {
> >+/* List of clock controls provided by the PRCI */ struct __prci_clock
> >+__prci_init_clocks_fu540[] = {
> > [PRCI_CLK_COREPLL] = {
> > .name = "corepll",
> > .parent_name = "hfclk",
> >@@ -506,125 +80,3 @@ static struct __prci_clock __prci_init_clocks[] = {
> > .ops = &sifive_fu540_prci_tlclksel_clk_ops,
> > },
> > };
> >-
> >-/**
> >- * __prci_register_clocks() - register clock controls in the PRCI with Linux
> >- * @dev: Linux struct device *
> >- *
> >- * Register the list of clock controls described in __prci_init_plls[] with
> >- * the Linux clock framework.
> >- *
> >- * Return: 0 upon success or a negative error code upon failure.
> >- */
> >-static int __prci_register_clocks(struct device *dev, struct __prci_data *pd) -{
> >- struct clk_init_data init = { };
> >- struct __prci_clock *pic;
> >- int parent_count, i, r;
> >-
> >- parent_count = of_clk_get_parent_count(dev->of_node);
> >- if (parent_count != EXPECTED_CLK_PARENT_COUNT) {
> >- dev_err(dev, "expected only two parent clocks, found %d\n",
> >- parent_count);
> >- return -EINVAL;
> >- }
> >-
> >- /* Register PLLs */
> >- for (i = 0; i < ARRAY_SIZE(__prci_init_clocks); ++i) {
> >- pic = &__prci_init_clocks[i];
> >-
> >- init.name = pic->name;
> >- init.parent_names = &pic->parent_name;
> >- init.num_parents = 1;
> >- init.ops = pic->ops;
> >- pic->hw.init = &init;
> >-
> >- pic->pd = pd;
> >-
> >- if (pic->pwd)
> >- __prci_wrpll_read_cfg(pd, pic->pwd);
> >-
> >- r = devm_clk_hw_register(dev, &pic->hw);
> >- if (r) {
> >- dev_warn(dev, "Failed to register clock %s: %d\n",
> >- init.name, r);
> >- return r;
> >- }
> >-
> >- r = clk_hw_register_clkdev(&pic->hw, pic->name, dev_name(dev));
> >- if (r) {
> >- dev_warn(dev, "Failed to register clkdev for %s: %d\n",
> >- init.name, r);
> >- return r;
> >- }
> >-
> >- pd->hw_clks.hws[i] = &pic->hw;
> >- }
> >-
> >- pd->hw_clks.num = i;
> >-
> >- r = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
> >- &pd->hw_clks);
> >- if (r) {
> >- dev_err(dev, "could not add hw_provider: %d\n", r);
> >- return r;
> >- }
> >-
> >- return 0;
> >-}
> >-
> >-/*
> >- * Linux device model integration
> >- *
> >- * See the Linux device model documentation for more information about
> >- * these functions.
> >- */
> >-static int sifive_fu540_prci_probe(struct platform_device *pdev) -{
> >- struct device *dev = &pdev->dev;
> >- struct resource *res;
> >- struct __prci_data *pd;
> >- int r;
> >-
> >- pd = devm_kzalloc(dev,
> >- struct_size(pd, hw_clks.hws,
> >- ARRAY_SIZE(__prci_init_clocks)),
> >- GFP_KERNEL);
> >- if (!pd)
> >- return -ENOMEM;
> >-
> >- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >- pd->va = devm_ioremap_resource(dev, res);
> >- if (IS_ERR(pd->va))
> >- return PTR_ERR(pd->va);
> >-
> >- r = __prci_register_clocks(dev, pd);
> >- if (r) {
> >- dev_err(dev, "could not register clocks: %d\n", r);
> >- return r;
> >- }
> >-
> >- dev_dbg(dev, "SiFive FU540 PRCI probed\n");
> >-
> >- return 0;
> >-}
> >-
> >-static const struct of_device_id sifive_fu540_prci_of_match[] = {
> >- { .compatible = "sifive,fu540-c000-prci", },
> >- {}
> >-};
> >-MODULE_DEVICE_TABLE(of, sifive_fu540_prci_of_match);
> >-
> >-static struct platform_driver sifive_fu540_prci_driver = {
> >- .driver = {
> >- .name = "sifive-fu540-prci",
> >- .of_match_table = sifive_fu540_prci_of_match,
> >- },
> >- .probe = sifive_fu540_prci_probe,
> >-};
> >-
> >-static int __init sifive_fu540_prci_init(void) -{
> >- return platform_driver_register(&sifive_fu540_prci_driver);
> >-}
> >-core_initcall(sifive_fu540_prci_init);
> >diff --git a/drivers/clk/sifive/fu540-prci.h b/drivers/clk/sifive/fu540-prci.h new
> >file mode 100644 index 000000000000..c8271efa7bdc
> >--- /dev/null
> >+++ b/drivers/clk/sifive/fu540-prci.h
> >@@ -0,0 +1,21 @@
> >+/* SPDX-License-Identifier: GPL-2.0 */
> >+/*
> >+ * Copyright (C) 2020 SiFive, Inc.
> >+ * Zong Li
> >+ */
> >+
> >+#ifndef __SIFIVE_CLK_FU540_PRCI_H
> >+#define __SIFIVE_CLK_FU540_PRCI_H
> >+
> >+#include "sifive-prci.h"
> >+
> >+#define NUM_CLOCK_FU540 4
> >+
> >+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 */
> >diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/sifive-prci.c
> >similarity index 45%
> >copy from drivers/clk/sifive/fu540-prci.c copy to drivers/clk/sifive/sifive-prci.c
> >index a8901f90a61a..0ac729eeb71b 100644
> >--- a/drivers/clk/sifive/fu540-prci.c
> >+++ b/drivers/clk/sifive/sifive-prci.c
> >@@ -3,6 +3,7 @@
> > * Copyright (C) 2018-2019 SiFive, Inc.
> > * Wesley Terpstra
> > * Paul Walmsley
> >+ * Zong Li
> > *
> > * 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 @@ -
> >13,180 +14,19 @@
> > * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> > * GNU General Public License for more details.
> > *
> >- * 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.
> >+ * The PRCI implements clock and reset control for the SiFive 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"
> > */
> >
> >-#include <dt-bindings/clock/sifive-fu540-prci.h>
> > #include <linux/clkdev.h>
> >-#include <linux/clk-provider.h>
> >-#include <linux/clk/analogbits-wrpll-cln28hpc.h>
> > #include <linux/delay.h>
> >-#include <linux/err.h>
> > #include <linux/io.h>
> >-#include <linux/module.h>
> >-#include <linux/of.h>
> >-#include <linux/of_clk.h>
> >-#include <linux/platform_device.h>
> >-#include <linux/slab.h>
> >-
> >-/*
> >- * EXPECTED_CLK_PARENT_COUNT: how many parent clocks this driver expects:
> >- * hfclk and rtcclk
> >- */
> >-#define EXPECTED_CLK_PARENT_COUNT 2
> >-
> >-/*
> >- * Register offsets and bitmasks
> >- */
> >-
> >-/* COREPLLCFG0 */
> >-#define PRCI_COREPLLCFG0_OFFSET 0x4
> >-# define PRCI_COREPLLCFG0_DIVR_SHIFT 0
> >-# define PRCI_COREPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_COREPLLCFG0_DIVR_SHIFT)
> >-# define PRCI_COREPLLCFG0_DIVF_SHIFT 6
> >-# define PRCI_COREPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_COREPLLCFG0_DIVF_SHIFT)
> >-# define PRCI_COREPLLCFG0_DIVQ_SHIFT 15
> >-# define PRCI_COREPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_COREPLLCFG0_DIVQ_SHIFT)
> >-# define PRCI_COREPLLCFG0_RANGE_SHIFT 18
> >-# define PRCI_COREPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_COREPLLCFG0_RANGE_SHIFT)
> >-# define PRCI_COREPLLCFG0_BYPASS_SHIFT 24
> >-# define PRCI_COREPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_COREPLLCFG0_BYPASS_SHIFT)
> >-# define PRCI_COREPLLCFG0_FSE_SHIFT 25
> >-# define PRCI_COREPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_COREPLLCFG0_FSE_SHIFT)
> >-# define PRCI_COREPLLCFG0_LOCK_SHIFT 31
> >-# define PRCI_COREPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_COREPLLCFG0_LOCK_SHIFT)
> >-
> >-/* DDRPLLCFG0 */
> >-#define PRCI_DDRPLLCFG0_OFFSET 0xc
> >-# define PRCI_DDRPLLCFG0_DIVR_SHIFT 0
> >-# define PRCI_DDRPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_DDRPLLCFG0_DIVR_SHIFT)
> >-# define PRCI_DDRPLLCFG0_DIVF_SHIFT 6
> >-# define PRCI_DDRPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_DDRPLLCFG0_DIVF_SHIFT)
> >-# define PRCI_DDRPLLCFG0_DIVQ_SHIFT 15
> >-# define PRCI_DDRPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_DDRPLLCFG0_DIVQ_SHIFT)
> >-# define PRCI_DDRPLLCFG0_RANGE_SHIFT 18
> >-# define PRCI_DDRPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_DDRPLLCFG0_RANGE_SHIFT)
> >-# define PRCI_DDRPLLCFG0_BYPASS_SHIFT 24
> >-# define PRCI_DDRPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_BYPASS_SHIFT)
> >-# define PRCI_DDRPLLCFG0_FSE_SHIFT 25
> >-# define PRCI_DDRPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_FSE_SHIFT)
> >-# define PRCI_DDRPLLCFG0_LOCK_SHIFT 31
> >-# define PRCI_DDRPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_LOCK_SHIFT)
> >-
> >-/* DDRPLLCFG1 */
> >-#define PRCI_DDRPLLCFG1_OFFSET 0x10
> >-# define PRCI_DDRPLLCFG1_CKE_SHIFT 24
> >-# define PRCI_DDRPLLCFG1_CKE_MASK (0x1 <<
> >PRCI_DDRPLLCFG1_CKE_SHIFT)
> >-
> >-/* GEMGXLPLLCFG0 */
> >-#define PRCI_GEMGXLPLLCFG0_OFFSET 0x1c
> >-# define PRCI_GEMGXLPLLCFG0_DIVR_SHIFT 0
> >-# define PRCI_GEMGXLPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_GEMGXLPLLCFG0_DIVR_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_DIVF_SHIFT 6
> >-# define PRCI_GEMGXLPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_GEMGXLPLLCFG0_DIVF_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT 15
> >-# define PRCI_GEMGXLPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_RANGE_SHIFT 18
> >-# define PRCI_GEMGXLPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_GEMGXLPLLCFG0_RANGE_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT 24
> >-# define PRCI_GEMGXLPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_FSE_SHIFT 25
> >-# define PRCI_GEMGXLPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_FSE_SHIFT)
> >-# define PRCI_GEMGXLPLLCFG0_LOCK_SHIFT 31
> >-# define PRCI_GEMGXLPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_LOCK_SHIFT)
> >-
> >-/* GEMGXLPLLCFG1 */
> >-#define PRCI_GEMGXLPLLCFG1_OFFSET 0x20
> >-# define PRCI_GEMGXLPLLCFG1_CKE_SHIFT 24
> >-# define PRCI_GEMGXLPLLCFG1_CKE_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG1_CKE_SHIFT)
> >-
> >-/* CORECLKSEL */
> >-#define PRCI_CORECLKSEL_OFFSET 0x24
> >-# define PRCI_CORECLKSEL_CORECLKSEL_SHIFT 0
> >-# define PRCI_CORECLKSEL_CORECLKSEL_MASK (0x1 <<
> >PRCI_CORECLKSEL_CORECLKSEL_SHIFT)
> >-
> >-/* DEVICESRESETREG */
> >-#define PRCI_DEVICESRESETREG_OFFSET 0x28
> >-# define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT 0
> >-# define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT 1
> >-# define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT 2
> >-# define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT 3
> >-# define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT)
> >-# define PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT 5
> >-# define PRCI_DEVICESRESETREG_GEMGXL_RST_N_MASK (0x1 <<
> >PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT)
> >-
> >-/* CLKMUXSTATUSREG */
> >-#define PRCI_CLKMUXSTATUSREG_OFFSET 0x2c
> >-# define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT 1
> >-# define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK (0x1 <<
> >PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT)
> >-
> >-/*
> >- * Private structures
> >- */
> >-
> >-/**
> >- * struct __prci_data - per-device-instance data
> >- * @va: base virtual address of the PRCI IP block
> >- * @hw_clks: encapsulates struct clk_hw records
> >- *
> >- * PRCI per-device instance data
> >- */
> >-struct __prci_data {
> >- void __iomem *va;
> >- struct clk_hw_onecell_data hw_clks;
> >-};
> >-
> >-/**
> >- * struct __prci_wrpll_data - WRPLL configuration and integration data
> >- * @c: WRPLL current configuration record
> >- * @enable_bypass: fn ptr to code to bypass the WRPLL (if applicable; else
> >NULL)
> >- * @disable_bypass: fn ptr to code to not bypass the WRPLL (or NULL)
> >- * @cfg0_offs: WRPLL CFG0 register offset (in bytes) from the PRCI base address
> >- *
> >- * @enable_bypass and @disable_bypass are used for WRPLL instances
> >- * that contain a separate external glitchless clock mux downstream
> >- * from the PLL. The WRPLL internal bypass mux is not glitchless.
> >- */
> >-struct __prci_wrpll_data {
> >- struct wrpll_cfg c;
> >- void (*enable_bypass)(struct __prci_data *pd);
> >- void (*disable_bypass)(struct __prci_data *pd);
> >- u8 cfg0_offs;
> >-};
> >-
> >-/**
> >- * struct __prci_clock - describes a clock device managed by PRCI
> >- * @name: user-readable clock name string - should match the manual
> >- * @parent_name: parent name for this clock
> >- * @ops: struct clk_ops for the Linux clock framework to use for control
> >- * @hw: Linux-private clock data
> >- * @pwd: WRPLL-specific data, associated with this clock (if not NULL)
> >- * @pd: PRCI-specific data associated with this clock (if not NULL)
> >- *
> >- * PRCI clock data. Used by the PRCI driver to register PRCI-provided
> >- * clocks to the Linux clock infrastructure.
> >- */
> >-struct __prci_clock {
> >- const char *name;
> >- const char *parent_name;
> >- const struct clk_ops *ops;
> >- struct clk_hw hw;
> >- struct __prci_wrpll_data *pwd;
> >- struct __prci_data *pd;
> >-};
> >-
> >-#define clk_hw_to_prci_clock(pwd) container_of(pwd, struct __prci_clock, hw)
> >+#include <linux/of_device.h>
> >+#include "sifive-prci.h"
> >+#include "fu540-prci.h"
> >
> > /*
> > * Private functions
> >@@ -222,7 +62,7 @@ static void __prci_writel(u32 v, u32 offs, struct
> >__prci_data *pd)
> > * @c: ptr to a struct wrpll_cfg record to write config into
> > * @r: value read from the PRCI PLL configuration register
> > *
> >- * Given a value @r read from an FU540 PRCI PLL configuration register,
> >+ * Given a value @r read from an FU740 PRCI PLL configuration register,
> > * split it into fields and populate it into the WRPLL configuration record
> > * pointed to by @c.
> > *
> >@@ -251,8 +91,8 @@ static void __prci_wrpll_unpack(struct wrpll_cfg *c, u32 r)
> > v >>= PRCI_COREPLLCFG0_RANGE_SHIFT;
> > c->range = v;
> >
> >- c->flags &= (WRPLL_FLAGS_INT_FEEDBACK_MASK |
> >- WRPLL_FLAGS_EXT_FEEDBACK_MASK);
> >+ c->flags &=
> >+ (WRPLL_FLAGS_INT_FEEDBACK_MASK |
> >WRPLL_FLAGS_EXT_FEEDBACK_MASK);
> >
> > /* external feedback mode not supported */
> > c->flags |= WRPLL_FLAGS_INT_FEEDBACK_MASK; @@ -329,48 +169,6 @@
> >static void __prci_wrpll_write_cfg(struct __prci_data *pd,
> > memcpy(&pwd->c, c, sizeof(*c));
> > }
> >
> >-/* Core clock mux control */
> >-
> >-/**
> >- * __prci_coreclksel_use_hfclk() - switch the CORECLK mux to output HFCLK
> >- * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg
> >- *
> >- * Switch the CORECLK mux to the HFCLK input source; return once complete.
> >- *
> >- * Context: Any context. Caller must prevent concurrent changes to the
> >- * PRCI_CORECLKSEL_OFFSET register.
> >- */
> >-static void __prci_coreclksel_use_hfclk(struct __prci_data *pd) -{
> >- u32 r;
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET);
> >- r |= PRCI_CORECLKSEL_CORECLKSEL_MASK;
> >- __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd);
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */
> >-}
> >-
> >-/**
> >- * __prci_coreclksel_use_corepll() - switch the CORECLK mux to output COREPLL
> >- * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg
> >- *
> >- * Switch the CORECLK mux to the PLL output clock; return once complete.
> >- *
> >- * Context: Any context. Caller must prevent concurrent changes to the
> >- * PRCI_CORECLKSEL_OFFSET register.
> >- */
> >-static void __prci_coreclksel_use_corepll(struct __prci_data *pd) -{
> >- u32 r;
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET);
> >- r &= ~PRCI_CORECLKSEL_CORECLKSEL_MASK;
> >- __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd);
> >-
> >- r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */
> >-}
> >-
> > /*
> > * Linux clock framework integration
> > *
> >@@ -378,8 +176,8 @@ static void __prci_coreclksel_use_corepll(struct
> >__prci_data *pd)
> > * these functions.
> > */
> >
> >-static unsigned long sifive_fu540_prci_wrpll_recalc_rate(struct clk_hw *hw,
> >- unsigned long parent_rate)
> >+unsigned long sifive_prci_wrpll_recalc_rate(struct clk_hw *hw,
> >+ unsigned long parent_rate)
> > {
> > struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> > struct __prci_wrpll_data *pwd = pc->pwd; @@ -387,9 +185,9 @@ static
> >unsigned long sifive_fu540_prci_wrpll_recalc_rate(struct clk_hw *hw,
> > return wrpll_calc_output_rate(&pwd->c, parent_rate); }
> >
> >-static long sifive_fu540_prci_wrpll_round_rate(struct clk_hw *hw,
> >- unsigned long rate,
> >- unsigned long *parent_rate)
> >+long sifive_prci_wrpll_round_rate(struct clk_hw *hw,
> >+ unsigned long rate,
> >+ unsigned long *parent_rate)
> > {
> > struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> > struct __prci_wrpll_data *pwd = pc->pwd; @@ -402,9 +200,8 @@ static
> >long sifive_fu540_prci_wrpll_round_rate(struct clk_hw *hw,
> > return wrpll_calc_output_rate(&c, *parent_rate); }
> >
> >-static int sifive_fu540_prci_wrpll_set_rate(struct clk_hw *hw,
> >- unsigned long rate,
> >- unsigned long parent_rate)
> >+int sifive_prci_wrpll_set_rate(struct clk_hw *hw,
> >+ unsigned long rate, unsigned long parent_rate)
> > {
> > struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> > struct __prci_wrpll_data *pwd = pc->pwd; @@ -428,20 +225,10 @@ static
> >int sifive_fu540_prci_wrpll_set_rate(struct clk_hw *hw,
> > return 0;
> > }
> >
> >-static const struct clk_ops sifive_fu540_prci_wrpll_clk_ops = {
> >- .set_rate = sifive_fu540_prci_wrpll_set_rate,
> >- .round_rate = sifive_fu540_prci_wrpll_round_rate,
> >- .recalc_rate = sifive_fu540_prci_wrpll_recalc_rate,
> >-};
> >-
> >-static const struct clk_ops sifive_fu540_prci_wrpll_ro_clk_ops = {
> >- .recalc_rate = sifive_fu540_prci_wrpll_recalc_rate,
> >-};
> >-
> > /* TLCLKSEL clock integration */
> >
> >-static unsigned long sifive_fu540_prci_tlclksel_recalc_rate(struct clk_hw *hw,
> >- unsigned long parent_rate)
> >+unsigned long sifive_prci_tlclksel_recalc_rate(struct clk_hw *hw,
> >+ unsigned long parent_rate)
> > {
> > struct __prci_clock *pc = clk_hw_to_prci_clock(hw);
> > struct __prci_data *pd = pc->pd;
> >@@ -455,68 +242,62 @@ static unsigned long
> >sifive_fu540_prci_tlclksel_recalc_rate(struct clk_hw *hw,
> > return div_u64(parent_rate, div);
> > }
> >
> >-static const struct clk_ops sifive_fu540_prci_tlclksel_clk_ops = {
> >- .recalc_rate = sifive_fu540_prci_tlclksel_recalc_rate,
> >-};
> >-
> > /*
> >- * PRCI integration data for each WRPLL instance
> >+ * Core clock mux control
> > */
> >
> >-static struct __prci_wrpll_data __prci_corepll_data = {
> >- .cfg0_offs = PRCI_COREPLLCFG0_OFFSET,
> >- .enable_bypass = __prci_coreclksel_use_hfclk,
> >- .disable_bypass = __prci_coreclksel_use_corepll,
> >-};
> >+/**
> >+ * sifive_prci_coreclksel_use_hfclk() - switch the CORECLK mux to
> >+output HFCLK
> >+ * @pd: struct __prci_data * for the PRCI containing the CORECLK mux
> >+reg
> >+ *
> >+ * Switch the CORECLK mux to the HFCLK input source; return once complete.
> >+ *
> >+ * Context: Any context. Caller must prevent concurrent changes to the
> >+ * PRCI_CORECLKSEL_OFFSET register.
> >+ */
> >+void sifive_prci_coreclksel_use_hfclk(struct __prci_data *pd) {
> >+ u32 r;
> >
> >-static struct __prci_wrpll_data __prci_ddrpll_data = {
> >- .cfg0_offs = PRCI_DDRPLLCFG0_OFFSET,
> >-};
> >+ r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET);
> >+ r |= PRCI_CORECLKSEL_CORECLKSEL_MASK;
> >+ __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd);
> >
> >-static struct __prci_wrpll_data __prci_gemgxlpll_data = {
> >- .cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET,
> >-};
> >+ r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */
> >+}
> >
> >-/*
> >- * List of clock controls provided by the PRCI
> >+/**
> >+ * sifive_prci_coreclksel_use_corepll() - switch the CORECLK mux to
> >+output
> >+ * COREPLL
> >+ * @pd: struct __prci_data * for the PRCI containing the CORECLK mux
> >+reg
> >+ *
> >+ * Switch the CORECLK mux to the COREPLL output clock; return once complete.
> >+ *
> >+ * Context: Any context. Caller must prevent concurrent changes to the
> >+ * PRCI_CORECLKSEL_OFFSET register.
> > */
> >+void sifive_prci_coreclksel_use_corepll(struct __prci_data *pd) {
> >+ u32 r;
> >
> >-static struct __prci_clock __prci_init_clocks[] = {
> >- [PRCI_CLK_COREPLL] = {
> >- .name = "corepll",
> >- .parent_name = "hfclk",
> >- .ops = &sifive_fu540_prci_wrpll_clk_ops,
> >- .pwd = &__prci_corepll_data,
> >- },
> >- [PRCI_CLK_DDRPLL] = {
> >- .name = "ddrpll",
> >- .parent_name = "hfclk",
> >- .ops = &sifive_fu540_prci_wrpll_ro_clk_ops,
> >- .pwd = &__prci_ddrpll_data,
> >- },
> >- [PRCI_CLK_GEMGXLPLL] = {
> >- .name = "gemgxlpll",
> >- .parent_name = "hfclk",
> >- .ops = &sifive_fu540_prci_wrpll_clk_ops,
> >- .pwd = &__prci_gemgxlpll_data,
> >- },
> >- [PRCI_CLK_TLCLK] = {
> >- .name = "tlclk",
> >- .parent_name = "corepll",
> >- .ops = &sifive_fu540_prci_tlclksel_clk_ops,
> >- },
> >-};
> >+ r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET);
> >+ r &= ~PRCI_CORECLKSEL_CORECLKSEL_MASK;
> >+ __prci_writel(r, PRCI_CORECLKSEL_OFFSET, pd);
> >+
> >+ r = __prci_readl(pd, PRCI_CORECLKSEL_OFFSET); /* barrier */
> >+}
> >
> > /**
> >- * __prci_register_clocks() - register clock controls in the PRCI with Linux
> >+ * __prci_register_clocks() - register clock controls in the PRCI
> > * @dev: Linux struct device *
> > *
> >- * Register the list of clock controls described in __prci_init_plls[] with
> >+ * Register the list of clock controls described in
> >+ __prci_init_clocks[] with
> > * the Linux clock framework.
> > *
> > * Return: 0 upon success or a negative error code upon failure.
> > */
> >-static int __prci_register_clocks(struct device *dev, struct __prci_data *pd)
> >+static int __prci_register_clocks(struct device *dev, struct __prci_data *pd,
> >+ const struct prci_clk_desc *desc)
> > {
> > struct clk_init_data init = { };
> > struct __prci_clock *pic;
> >@@ -530,8 +311,8 @@ static int __prci_register_clocks(struct device *dev,
> >struct __prci_data *pd)
> > }
> >
> > /* Register PLLs */
> >- for (i = 0; i < ARRAY_SIZE(__prci_init_clocks); ++i) {
> >- pic = &__prci_init_clocks[i];
> >+ for (i = 0; i < desc->num_clks; ++i) {
> >+ pic = &(desc->clks[i]);
> >
> > init.name = pic->name;
> > init.parent_names = &pic->parent_name; @@ -573,23 +354,22 @@
> >static int __prci_register_clocks(struct device *dev, struct __prci_data *pd)
> > return 0;
> > }
> >
> >-/*
> >- * Linux device model integration
> >+/**
> >+ * sifive_prci_init() - initialize prci data and check parent count
> > *
> >- * See the Linux device model documentation for more information about
> >- * these functions.
> >+ * Return: 0 upon success or a negative error code upon failure.
> > */
> >-static int sifive_fu540_prci_probe(struct platform_device *pdev)
> >+static int sifive_prci_probe(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > struct resource *res;
> > struct __prci_data *pd;
> >+ const struct prci_clk_desc *desc;
> > int r;
> >
> >- pd = devm_kzalloc(dev,
> >- struct_size(pd, hw_clks.hws,
> >- ARRAY_SIZE(__prci_init_clocks)),
> >- GFP_KERNEL);
> >+ desc = of_device_get_match_data(&pdev->dev);
> >+
> >+ pd = devm_kzalloc(dev, struct_size(pd, hw_clks.hws, desc->num_clks),
> >+GFP_KERNEL);
> > if (!pd)
> > return -ENOMEM;
> >
> >@@ -598,33 +378,32 @@ static int sifive_fu540_prci_probe(struct
> >platform_device *pdev)
> > if (IS_ERR(pd->va))
> > return PTR_ERR(pd->va);
> >
> >- r = __prci_register_clocks(dev, pd);
> >+ r = __prci_register_clocks(dev, pd, desc);
> > if (r) {
> > dev_err(dev, "could not register clocks: %d\n", r);
> > return r;
> > }
> >
> >- dev_dbg(dev, "SiFive FU540 PRCI probed\n");
> >+ dev_dbg(dev, "SiFive PRCI probed\n");
> >
> > return 0;
> > }
> >
> >-static const struct of_device_id sifive_fu540_prci_of_match[] = {
> >- { .compatible = "sifive,fu540-c000-prci", },
> >+static const struct of_device_id sifive_prci_of_match[] = {
> >+ {.compatible = "sifive,fu540-c000-prci", .data = &prci_clk_fu540},
> > {}
> > };
> >-MODULE_DEVICE_TABLE(of, sifive_fu540_prci_of_match);
> >
> >-static struct platform_driver sifive_fu540_prci_driver = {
> >- .driver = {
> >- .name = "sifive-fu540-prci",
> >- .of_match_table = sifive_fu540_prci_of_match,
> >+static struct platform_driver sifive_prci_driver = {
> >+ .driver = {
> >+ .name = "sifive-clk-prci",
> >+ .of_match_table = sifive_prci_of_match,
> > },
> >- .probe = sifive_fu540_prci_probe,
> >+ .probe = sifive_prci_probe,
> > };
> >
> >-static int __init sifive_fu540_prci_init(void)
> >+static int __init sifive_prci_init(void)
> > {
> >- return platform_driver_register(&sifive_fu540_prci_driver);
> >+ return platform_driver_register(&sifive_prci_driver);
> > }
> >-core_initcall(sifive_fu540_prci_init);
> >+core_initcall(sifive_prci_init);
> >diff --git a/drivers/clk/sifive/sifive-prci.h b/drivers/clk/sifive/sifive-prci.h
> >new file mode 100644
> >index 000000000000..025f717bc053
> >--- /dev/null
> >+++ b/drivers/clk/sifive/sifive-prci.h
> >@@ -0,0 +1,201 @@
> >+/* SPDX-License-Identifier: GPL-2.0 */
> >+/*
> >+ * Copyright (C) 2018-2019 SiFive, Inc.
> >+ * Wesley Terpstra
> >+ * Paul Walmsley
> >+ * Zong Li
> >+ */
> >+
> >+#ifndef __SIFIVE_CLK_SIFIVE_PRCI_H
> >+#define __SIFIVE_CLK_SIFIVE_PRCI_H
> >+
> >+#include <linux/clk/analogbits-wrpll-cln28hpc.h>
> >+#include <linux/clk-provider.h>
> >+#include <linux/platform_device.h>
> >+
> >+/*
> >+ * EXPECTED_CLK_PARENT_COUNT: how many parent clocks this driver expects:
> >+ * hfclk and rtcclk
> >+ */
> >+#define EXPECTED_CLK_PARENT_COUNT 2
> >+
> >+/*
> >+ * Register offsets and bitmasks
> >+ */
> >+
> >+/* COREPLLCFG0 */
> >+#define PRCI_COREPLLCFG0_OFFSET 0x4
> >+#define PRCI_COREPLLCFG0_DIVR_SHIFT 0
> >+#define PRCI_COREPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_COREPLLCFG0_DIVR_SHIFT)
> >+#define PRCI_COREPLLCFG0_DIVF_SHIFT 6
> >+#define PRCI_COREPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_COREPLLCFG0_DIVF_SHIFT)
> >+#define PRCI_COREPLLCFG0_DIVQ_SHIFT 15
> >+#define PRCI_COREPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_COREPLLCFG0_DIVQ_SHIFT)
> >+#define PRCI_COREPLLCFG0_RANGE_SHIFT 18
> >+#define PRCI_COREPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_COREPLLCFG0_RANGE_SHIFT)
> >+#define PRCI_COREPLLCFG0_BYPASS_SHIFT 24
> >+#define PRCI_COREPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_COREPLLCFG0_BYPASS_SHIFT)
> >+#define PRCI_COREPLLCFG0_FSE_SHIFT 25
> >+#define PRCI_COREPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_COREPLLCFG0_FSE_SHIFT)
> >+#define PRCI_COREPLLCFG0_LOCK_SHIFT 31
> >+#define PRCI_COREPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_COREPLLCFG0_LOCK_SHIFT)
> >+
> >+/* DDRPLLCFG0 */
> >+#define PRCI_DDRPLLCFG0_OFFSET 0xc
> >+#define PRCI_DDRPLLCFG0_DIVR_SHIFT 0
> >+#define PRCI_DDRPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_DDRPLLCFG0_DIVR_SHIFT)
> >+#define PRCI_DDRPLLCFG0_DIVF_SHIFT 6
> >+#define PRCI_DDRPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_DDRPLLCFG0_DIVF_SHIFT)
> >+#define PRCI_DDRPLLCFG0_DIVQ_SHIFT 15
> >+#define PRCI_DDRPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_DDRPLLCFG0_DIVQ_SHIFT)
> >+#define PRCI_DDRPLLCFG0_RANGE_SHIFT 18
> >+#define PRCI_DDRPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_DDRPLLCFG0_RANGE_SHIFT)
> >+#define PRCI_DDRPLLCFG0_BYPASS_SHIFT 24
> >+#define PRCI_DDRPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_BYPASS_SHIFT)
> >+#define PRCI_DDRPLLCFG0_FSE_SHIFT 25
> >+#define PRCI_DDRPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_FSE_SHIFT)
> >+#define PRCI_DDRPLLCFG0_LOCK_SHIFT 31
> >+#define PRCI_DDRPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_DDRPLLCFG0_LOCK_SHIFT)
> >+
> >+/* DDRPLLCFG1 */
> >+#define PRCI_DDRPLLCFG1_OFFSET 0x10
> >+#define PRCI_DDRPLLCFG1_CKE_SHIFT 24
> >+#define PRCI_DDRPLLCFG1_CKE_MASK (0x1 <<
> >PRCI_DDRPLLCFG1_CKE_SHIFT)
>
> This CFG1_CLK_SHIFT should be changed to 31.
>
> >+
> >+/* GEMGXLPLLCFG0 */
> >+#define PRCI_GEMGXLPLLCFG0_OFFSET 0x1c
> >+#define PRCI_GEMGXLPLLCFG0_DIVR_SHIFT 0
> >+#define PRCI_GEMGXLPLLCFG0_DIVR_MASK (0x3f <<
> >PRCI_GEMGXLPLLCFG0_DIVR_SHIFT)
> >+#define PRCI_GEMGXLPLLCFG0_DIVF_SHIFT 6
> >+#define PRCI_GEMGXLPLLCFG0_DIVF_MASK (0x1ff <<
> >PRCI_GEMGXLPLLCFG0_DIVF_SHIFT)
> >+#define PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT 15
> >+#define PRCI_GEMGXLPLLCFG0_DIVQ_MASK (0x7 <<
> >PRCI_GEMGXLPLLCFG0_DIVQ_SHIFT)
> >+#define PRCI_GEMGXLPLLCFG0_RANGE_SHIFT 18
> >+#define PRCI_GEMGXLPLLCFG0_RANGE_MASK (0x7 <<
> >PRCI_GEMGXLPLLCFG0_RANGE_SHIFT)
> >+#define PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT 24
> >+#define PRCI_GEMGXLPLLCFG0_BYPASS_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_BYPASS_SHIFT)
> >+#define PRCI_GEMGXLPLLCFG0_FSE_SHIFT 25
> >+#define PRCI_GEMGXLPLLCFG0_FSE_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_FSE_SHIFT)
> >+#define PRCI_GEMGXLPLLCFG0_LOCK_SHIFT 31
> >+#define PRCI_GEMGXLPLLCFG0_LOCK_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG0_LOCK_SHIFT)
> >+
> >+/* GEMGXLPLLCFG1 */
> >+#define PRCI_GEMGXLPLLCFG1_OFFSET 0x20
> >+#define RCI_GEMGXLPLLCFG1_CKE_SHIFT 24
> >+#define PRCI_GEMGXLPLLCFG1_CKE_MASK (0x1 <<
> >PRCI_GEMGXLPLLCFG1_CKE_SHIFT)
>
> Same here, Other than this
>
Thanks for your review. It was wrong in original code, I'd like to
give a separate commit to fix it in v4 patch set.
> Reviewed-by: Pragnesh Patel <Pragnesh.patel@xxxxxxxxxx>
>
> >+
> >+/* CORECLKSEL */
> >+#define PRCI_CORECLKSEL_OFFSET 0x24
> >+#define PRCI_CORECLKSEL_CORECLKSEL_SHIFT 0
> >+#define PRCI_CORECLKSEL_CORECLKSEL_MASK \
> >+ (0x1 << PRCI_CORECLKSEL_CORECLKSEL_SHIFT)
> >+
> >+/* DEVICESRESETREG */
> >+#define PRCI_DEVICESRESETREG_OFFSET 0x28
> >+#define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT 0
> >+#define PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_MASK \
> >+ (0x1 << PRCI_DEVICESRESETREG_DDR_CTRL_RST_N_SHIFT)
> >+#define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT 1
> >+#define PRCI_DEVICESRESETREG_DDR_AXI_RST_N_MASK \
> >+ (0x1 << PRCI_DEVICESRESETREG_DDR_AXI_RST_N_SHIFT)
> >+#define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT 2
> >+#define PRCI_DEVICESRESETREG_DDR_AHB_RST_N_MASK \
> >+ (0x1 << PRCI_DEVICESRESETREG_DDR_AHB_RST_N_SHIFT)
> >+#define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT 3
> >+#define PRCI_DEVICESRESETREG_DDR_PHY_RST_N_MASK \
> >+ (0x1 << PRCI_DEVICESRESETREG_DDR_PHY_RST_N_SHIFT)
> >+#define PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT 5
> >+#define PRCI_DEVICESRESETREG_GEMGXL_RST_N_MASK \
> >+ (0x1 << PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT)
> >+#define PRCI_DEVICESRESETREG_CHIPLINK_RST_N_SHIFT 6
> >+#define PRCI_DEVICESRESETREG_CHIPLINK_RST_N_MASK \
> >+ (0x1 << PRCI_DEVICESRESETREG_CHIPLINK_RST_N_SHIFT)
> >+
> >+/* CLKMUXSTATUSREG */
> >+#define PRCI_CLKMUXSTATUSREG_OFFSET 0x2c
> >+#define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT 1
> >+#define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK \
> >+ (0x1 << PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT)
> >+
> >+/*
> >+ * Private structures
> >+ */
> >+
> >+/**
> >+ * struct __prci_data - per-device-instance data
> >+ * @va: base virtual address of the PRCI IP block
> >+ * @hw_clks: encapsulates struct clk_hw records
> >+ *
> >+ * PRCI per-device instance data
> >+ */
> >+struct __prci_data {
> >+ void __iomem *va;
> >+ struct clk_hw_onecell_data hw_clks;
> >+};
> >+
> >+/**
> >+ * struct __prci_wrpll_data - WRPLL configuration and integration data
> >+ * @c: WRPLL current configuration record
> >+ * @enable_bypass: fn ptr to code to bypass the WRPLL (if applicable;
> >+else NULL)
> >+ * @disable_bypass: fn ptr to code to not bypass the WRPLL (or NULL)
> >+ * @cfg0_offs: WRPLL CFG0 register offset (in bytes) from the PRCI base
> >+address
> >+ *
> >+ * @enable_bypass and @disable_bypass are used for WRPLL instances
> >+ * that contain a separate external glitchless clock mux downstream
> >+ * from the PLL. The WRPLL internal bypass mux is not glitchless.
> >+ */
> >+struct __prci_wrpll_data {
> >+ struct wrpll_cfg c;
> >+ void (*enable_bypass)(struct __prci_data *pd);
> >+ void (*disable_bypass)(struct __prci_data *pd);
> >+ u8 cfg0_offs;
> >+};
> >+
> >+/**
> >+ * struct __prci_clock - describes a clock device managed by PRCI
> >+ * @name: user-readable clock name string - should match the manual
> >+ * @parent_name: parent name for this clock
> >+ * @ops: struct clk_ops for the Linux clock framework to use for
> >+control
> >+ * @hw: Linux-private clock data
> >+ * @pwd: WRPLL-specific data, associated with this clock (if not NULL)
> >+ * @pd: PRCI-specific data associated with this clock (if not NULL)
> >+ *
> >+ * PRCI clock data. Used by the PRCI driver to register PRCI-provided
> >+ * clocks to the Linux clock infrastructure.
> >+ */
> >+struct __prci_clock {
> >+ const char *name;
> >+ const char *parent_name;
> >+ const struct clk_ops *ops;
> >+ struct clk_hw hw;
> >+ struct __prci_wrpll_data *pwd;
> >+ struct __prci_data *pd;
> >+};
> >+
> >+#define clk_hw_to_prci_clock(pwd) container_of(pwd, struct
> >+__prci_clock, hw)
> >+
> >+/*
> >+ * struct prci_clk_desc - describes the information of clocks of each
> >+SoCs
> >+ * @clks: point to a array of __prci_clock
> >+ * @num_clks: the number of element of clks */ struct prci_clk_desc {
> >+ struct __prci_clock *clks;
> >+ size_t num_clks;
> >+};
> >+
> >+/* Core clock mux control */
> >+void sifive_prci_coreclksel_use_hfclk(struct __prci_data *pd); void
> >+sifive_prci_coreclksel_use_corepll(struct __prci_data *pd);
> >+
> >+/* Linux clock framework integration */ long
> >+sifive_prci_wrpll_round_rate(struct clk_hw *hw, unsigned long rate,
> >+ unsigned long *parent_rate);
> >+int sifive_prci_wrpll_set_rate(struct clk_hw *hw, unsigned long rate,
> >+ unsigned long parent_rate);
> >+unsigned long sifive_prci_wrpll_recalc_rate(struct clk_hw *hw,
> >+ unsigned long parent_rate);
> >+unsigned long sifive_prci_tlclksel_recalc_rate(struct clk_hw *hw,
> >+ unsigned long parent_rate);
> >+
> >+#endif /* __SIFIVE_CLK_SIFIVE_PRCI_H */
> >--
> >2.29.2
>