drivers: clk: add fu740 support
Add fu740 support. One abstract layer is added for supporting
multiple chips such as fu540 and fu740.
Signed-off-by: Green Wan <green.wan@sifive.com>
diff --git a/drivers/clk/sifive/sifive-prci.c b/drivers/clk/sifive/sifive-prci.c
new file mode 100644
index 0000000..cd1acb9
--- /dev/null
+++ b/drivers/clk/sifive/sifive-prci.c
@@ -0,0 +1,733 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018-2021 SiFive, Inc.
+ * Wesley Terpstra
+ * Paul Walmsley
+ * Zong Li
+ * Pragnesh Patel
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <clk.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <asm/arch/reset.h>
+#include <linux/delay.h>
+#include <linux/math64.h>
+#include <dt-bindings/clock/sifive-fu740-prci.h>
+
+#include "fu540-prci.h"
+#include "fu740-prci.h"
+
+/*
+ * 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(pd->va + offs);
+}
+
+static void __prci_writel(u32 v, u32 offs, struct __prci_data *pd)
+{
+ writel(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_cfg0() - 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_cfg0(struct __prci_data *pd,
+ struct __prci_wrpll_data *pwd)
+{
+ __prci_wrpll_unpack(&pwd->c, __prci_readl(pd, pwd->cfg0_offs));
+}
+
+/**
+ * __prci_wrpll_write_cfg0() - 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_cfg0(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));
+}
+
+/**
+ * __prci_wrpll_write_cfg1() - write Clock enable/disable configuration
+ * into the PRCI
+ * @pd: PRCI context
+ * @pwd: PRCI WRPLL metadata
+ * @enable: Clock enable or disable value
+ */
+static void __prci_wrpll_write_cfg1(struct __prci_data *pd,
+ struct __prci_wrpll_data *pwd,
+ u32 enable)
+{
+ __prci_writel(enable, pwd->cfg1_offs, pd);
+}
+
+unsigned long sifive_prci_wrpll_recalc_rate(struct __prci_clock *pc,
+ unsigned long parent_rate)
+{
+ struct __prci_wrpll_data *pwd = pc->pwd;
+
+ return wrpll_calc_output_rate(&pwd->c, parent_rate);
+}
+
+unsigned long sifive_prci_wrpll_round_rate(struct __prci_clock *pc,
+ unsigned long rate,
+ unsigned long *parent_rate)
+{
+ 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);
+}
+
+int sifive_prci_wrpll_set_rate(struct __prci_clock *pc,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ 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_cfg0(pd, pwd, &pwd->c);
+
+ udelay(wrpll_calc_max_lock_us(&pwd->c));
+
+ return 0;
+}
+
+int sifive_prci_clock_enable(struct __prci_clock *pc, bool enable)
+{
+ struct __prci_wrpll_data *pwd = pc->pwd;
+ struct __prci_data *pd = pc->pd;
+
+ if (enable) {
+ __prci_wrpll_write_cfg1(pd, pwd, PRCI_COREPLLCFG1_CKE_MASK);
+
+ if (pwd->disable_bypass)
+ pwd->disable_bypass(pd);
+
+ if (pwd->release_reset)
+ pwd->release_reset(pd);
+ } else {
+ u32 r;
+
+ if (pwd->enable_bypass)
+ pwd->enable_bypass(pd);
+
+ r = __prci_readl(pd, pwd->cfg1_offs);
+ r &= ~PRCI_COREPLLCFG1_CKE_MASK;
+
+ __prci_wrpll_write_cfg1(pd, pwd, r);
+ }
+
+ return 0;
+}
+
+/* TLCLKSEL clock integration */
+
+unsigned long sifive_prci_tlclksel_recalc_rate(struct __prci_clock *pc,
+ unsigned long parent_rate)
+{
+ 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);
+}
+
+/* HFPCLK clock integration */
+
+unsigned long sifive_prci_hfpclkplldiv_recalc_rate(struct __prci_clock *pc,
+ unsigned long parent_rate)
+{
+ struct __prci_data *pd = pc->pd;
+ u32 div = __prci_readl(pd, PRCI_HFPCLKPLLDIV_OFFSET);
+
+ return div_u64(parent_rate, div + 2);
+}
+
+/**
+ * sifive_prci_coreclksel_use_final_corepll() - switch the CORECLK mux to output
+ * FINAL_COREPLL
+ * @pd: struct __prci_data * for the PRCI containing the CORECLK mux reg
+ *
+ * Switch the CORECLK mux to the final 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_final_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 */
+}
+
+/**
+ * sifive_prci_corepllsel_use_dvfscorepll() - switch the COREPLL mux to
+ * output DVFS_COREPLL
+ * @pd: struct __prci_data * for the PRCI containing the COREPLL mux reg
+ *
+ * Switch the COREPLL mux to the DVFSCOREPLL output clock; return once complete.
+ *
+ * Context: Any context. Caller must prevent concurrent changes to the
+ * PRCI_COREPLLSEL_OFFSET register.
+ */
+void sifive_prci_corepllsel_use_dvfscorepll(struct __prci_data *pd)
+{
+ u32 r;
+
+ r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET);
+ r |= PRCI_COREPLLSEL_COREPLLSEL_MASK;
+ __prci_writel(r, PRCI_COREPLLSEL_OFFSET, pd);
+
+ r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET); /* barrier */
+}
+
+/**
+ * sifive_prci_corepllsel_use_corepll() - switch the COREPLL mux to
+ * output COREPLL
+ * @pd: struct __prci_data * for the PRCI containing the COREPLL mux reg
+ *
+ * Switch the COREPLL mux to the COREPLL output clock; return once complete.
+ *
+ * Context: Any context. Caller must prevent concurrent changes to the
+ * PRCI_COREPLLSEL_OFFSET register.
+ */
+void sifive_prci_corepllsel_use_corepll(struct __prci_data *pd)
+{
+ u32 r;
+
+ r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET);
+ r &= ~PRCI_COREPLLSEL_COREPLLSEL_MASK;
+ __prci_writel(r, PRCI_COREPLLSEL_OFFSET, pd);
+
+ r = __prci_readl(pd, PRCI_COREPLLSEL_OFFSET); /* barrier */
+}
+
+/**
+ * sifive_prci_hfpclkpllsel_use_hfclk() - switch the HFPCLKPLL mux to
+ * output HFCLK
+ * @pd: struct __prci_data * for the PRCI containing the HFPCLKPLL mux reg
+ *
+ * Switch the HFPCLKPLL mux to the HFCLK input source; return once complete.
+ *
+ * Context: Any context. Caller must prevent concurrent changes to the
+ * PRCI_HFPCLKPLLSEL_OFFSET register.
+ */
+void sifive_prci_hfpclkpllsel_use_hfclk(struct __prci_data *pd)
+{
+ u32 r;
+
+ r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET);
+ r |= PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_MASK;
+ __prci_writel(r, PRCI_HFPCLKPLLSEL_OFFSET, pd);
+
+ r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); /* barrier */
+}
+
+/**
+ * sifive_prci_hfpclkpllsel_use_hfpclkpll() - switch the HFPCLKPLL mux to
+ * output HFPCLKPLL
+ * @pd: struct __prci_data * for the PRCI containing the HFPCLKPLL mux reg
+ *
+ * Switch the HFPCLKPLL mux to the HFPCLKPLL output clock; return once complete.
+ *
+ * Context: Any context. Caller must prevent concurrent changes to the
+ * PRCI_HFPCLKPLLSEL_OFFSET register.
+ */
+void sifive_prci_hfpclkpllsel_use_hfpclkpll(struct __prci_data *pd)
+{
+ u32 r;
+
+ r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET);
+ r &= ~PRCI_HFPCLKPLLSEL_HFPCLKPLLSEL_MASK;
+ __prci_writel(r, PRCI_HFPCLKPLLSEL_OFFSET, pd);
+
+ r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); /* barrier */
+}
+
+static int __prci_consumer_reset(const char *rst_name, bool trigger)
+{
+ struct udevice *dev;
+ struct reset_ctl rst_sig;
+ int ret;
+
+ ret = uclass_get_device_by_driver(UCLASS_RESET,
+ DM_DRIVER_GET(sifive_reset),
+ &dev);
+ if (ret) {
+ dev_err(dev, "Reset driver not found: %d\n", ret);
+ return ret;
+ }
+
+ ret = reset_get_by_name(dev, rst_name, &rst_sig);
+ if (ret) {
+ dev_err(dev, "failed to get %s reset\n", rst_name);
+ return ret;
+ }
+
+ if (reset_valid(&rst_sig)) {
+ if (trigger)
+ ret = reset_deassert(&rst_sig);
+ else
+ ret = reset_assert(&rst_sig);
+ if (ret) {
+ dev_err(dev, "failed to trigger reset id = %ld\n",
+ rst_sig.id);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+/**
+ * sifive_prci_ddr_release_reset() - Release DDR reset
+ * @pd: struct __prci_data * for the PRCI containing the DDRCLK mux reg
+ *
+ */
+void sifive_prci_ddr_release_reset(struct __prci_data *pd)
+{
+ /* Release DDR ctrl reset */
+ __prci_consumer_reset("ddr_ctrl", true);
+
+ /* HACK to get the '1 full controller clock cycle'. */
+ asm volatile ("fence");
+
+ /* Release DDR AXI reset */
+ __prci_consumer_reset("ddr_axi", true);
+
+ /* Release DDR AHB reset */
+ __prci_consumer_reset("ddr_ahb", true);
+
+ /* Release DDR PHY reset */
+ __prci_consumer_reset("ddr_phy", true);
+
+ /* HACK to get the '1 full controller clock cycle'. */
+ asm volatile ("fence");
+
+ /*
+ * These take like 16 cycles to actually propagate. We can't go sending
+ * stuff before they come out of reset. So wait.
+ */
+ for (int i = 0; i < 256; i++)
+ asm volatile ("nop");
+}
+
+/**
+ * sifive_prci_ethernet_release_reset() - Release ethernet reset
+ * @pd: struct __prci_data * for the PRCI containing the Ethernet CLK mux reg
+ *
+ */
+void sifive_prci_ethernet_release_reset(struct __prci_data *pd)
+{
+ /* Release GEMGXL reset */
+ __prci_consumer_reset("gemgxl_reset", true);
+
+ /* Procmon => core clock */
+ __prci_writel(PRCI_PROCMONCFG_CORE_CLOCK_MASK, PRCI_PROCMONCFG_OFFSET,
+ pd);
+
+ /* Release Chiplink reset */
+ __prci_consumer_reset("cltx_reset", true);
+}
+
+/**
+ * sifive_prci_cltx_release_reset() - Release cltx reset
+ * @pd: struct __prci_data * for the PRCI containing the Ethernet CLK mux reg
+ *
+ */
+void sifive_prci_cltx_release_reset(struct __prci_data *pd)
+{
+ /* Release CLTX reset */
+ __prci_consumer_reset("cltx_reset", true);
+}
+
+/* Core clock mux control */
+
+/**
+ * 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;
+
+ 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 */
+}
+
+/**
+ * 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 PLL 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;
+
+ 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 */
+}
+
+static ulong sifive_prci_parent_rate(struct __prci_clock *pc, struct prci_clk_desc *data)
+{
+ ulong parent_rate;
+ ulong i;
+ struct __prci_clock *p;
+
+ if (strcmp(pc->parent_name, "corepll") == 0 ||
+ strcmp(pc->parent_name, "hfpclkpll") == 0) {
+ for (i = 0; i < data->num_clks; i++) {
+ if (strcmp(pc->parent_name, data->clks[i].name) == 0)
+ break;
+ }
+
+ if (i >= data->num_clks)
+ return -ENXIO;
+
+ p = &data->clks[i];
+ if (!p->pd || !p->ops->recalc_rate)
+ return -ENXIO;
+
+ return p->ops->recalc_rate(p, sifive_prci_parent_rate(p, data));
+ }
+
+ if (strcmp(pc->parent_name, "rtcclk") == 0)
+ parent_rate = clk_get_rate(&pc->pd->parent_rtcclk);
+ else
+ parent_rate = clk_get_rate(&pc->pd->parent_hfclk);
+
+ return parent_rate;
+}
+
+static ulong sifive_prci_get_rate(struct clk *clk)
+{
+ struct __prci_clock *pc;
+ struct prci_clk_desc *data =
+ (struct prci_clk_desc *)dev_get_driver_data(clk->dev);
+
+ if (data->num_clks <= clk->id)
+ return -ENXIO;
+
+ pc = &data->clks[clk->id];
+ if (!pc->pd || !pc->ops->recalc_rate)
+ return -ENXIO;
+
+ return pc->ops->recalc_rate(pc, sifive_prci_parent_rate(pc, data));
+}
+
+static ulong sifive_prci_set_rate(struct clk *clk, ulong rate)
+{
+ int err;
+ struct __prci_clock *pc;
+ struct prci_clk_desc *data =
+ (struct prci_clk_desc *)dev_get_driver_data(clk->dev);
+
+ if (data->num_clks <= clk->id)
+ return -ENXIO;
+
+ pc = &data->clks[clk->id];
+ if (!pc->pd || !pc->ops->set_rate)
+ return -ENXIO;
+
+ err = pc->ops->set_rate(pc, rate, sifive_prci_parent_rate(pc, data));
+ if (err)
+ return err;
+
+ return rate;
+}
+
+static int sifive_prci_enable(struct clk *clk)
+{
+ struct __prci_clock *pc;
+ int ret = 0;
+ struct prci_clk_desc *data =
+ (struct prci_clk_desc *)dev_get_driver_data(clk->dev);
+
+ if (data->num_clks <= clk->id)
+ return -ENXIO;
+
+ pc = &data->clks[clk->id];
+ if (!pc->pd)
+ return -ENXIO;
+
+ if (pc->ops->enable_clk)
+ ret = pc->ops->enable_clk(pc, 1);
+
+ return ret;
+}
+
+static int sifive_prci_disable(struct clk *clk)
+{
+ struct __prci_clock *pc;
+ int ret = 0;
+ struct prci_clk_desc *data =
+ (struct prci_clk_desc *)dev_get_driver_data(clk->dev);
+
+ if (data->num_clks <= clk->id)
+ return -ENXIO;
+
+ pc = &data->clks[clk->id];
+ if (!pc->pd)
+ return -ENXIO;
+
+ if (pc->ops->enable_clk)
+ ret = pc->ops->enable_clk(pc, 0);
+
+ return ret;
+}
+
+static int sifive_prci_probe(struct udevice *dev)
+{
+ int i, err;
+ struct __prci_clock *pc;
+ struct __prci_data *pd = dev_get_priv(dev);
+
+ struct prci_clk_desc *data =
+ (struct prci_clk_desc *)dev_get_driver_data(dev);
+
+ pd->va = (void *)dev_read_addr(dev);
+ if (IS_ERR(pd->va))
+ return PTR_ERR(pd->va);
+
+ err = clk_get_by_index(dev, 0, &pd->parent_hfclk);
+ if (err)
+ return err;
+
+ err = clk_get_by_index(dev, 1, &pd->parent_rtcclk);
+ if (err)
+ return err;
+
+ for (i = 0; i < data->num_clks; ++i) {
+ pc = &data->clks[i];
+ pc->pd = pd;
+ if (pc->pwd)
+ __prci_wrpll_read_cfg0(pd, pc->pwd);
+ }
+
+ if (IS_ENABLED(CONFIG_SPL_BUILD)) {
+ if (device_is_compatible(dev, "sifive,fu740-c000-prci")) {
+ u32 prci_pll_reg;
+ unsigned long parent_rate;
+
+ prci_pll_reg = readl(pd->va + PRCI_PRCIPLL_OFFSET);
+
+ if (prci_pll_reg & PRCI_PRCIPLL_HFPCLKPLL) {
+ /*
+ * Only initialize the HFPCLK PLL. In this
+ * case the design uses hfpclk to drive
+ * Chiplink
+ */
+ pc = &data->clks[PRCI_CLK_HFPCLKPLL];
+ parent_rate = sifive_prci_parent_rate(pc, data);
+ sifive_prci_wrpll_set_rate(pc, 260000000,
+ parent_rate);
+ pc->ops->enable_clk(pc, 1);
+ } else if (prci_pll_reg & PRCI_PRCIPLL_CLTXPLL) {
+ /* CLTX pll init */
+ pc = &data->clks[PRCI_CLK_CLTXPLL];
+ parent_rate = sifive_prci_parent_rate(pc, data);
+ sifive_prci_wrpll_set_rate(pc, 260000000,
+ parent_rate);
+ pc->ops->enable_clk(pc, 1);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static struct clk_ops sifive_prci_ops = {
+ .set_rate = sifive_prci_set_rate,
+ .get_rate = sifive_prci_get_rate,
+ .enable = sifive_prci_enable,
+ .disable = sifive_prci_disable,
+};
+
+static int sifive_clk_bind(struct udevice *dev)
+{
+ return sifive_reset_bind(dev, PRCI_DEVICERESETCNT);
+}
+
+static const struct udevice_id sifive_prci_ids[] = {
+ { .compatible = "sifive,fu540-c000-prci", .data = (ulong)&prci_clk_fu540 },
+ { .compatible = "sifive,fu740-c000-prci", .data = (ulong)&prci_clk_fu740 },
+ { }
+};
+
+U_BOOT_DRIVER(sifive_prci) = {
+ .name = "sifive-prci",
+ .id = UCLASS_CLK,
+ .of_match = sifive_prci_ids,
+ .probe = sifive_prci_probe,
+ .ops = &sifive_prci_ops,
+ .priv_auto = sizeof(struct __prci_data),
+ .bind = sifive_clk_bind,
+};