1 // SPDX-License-Identifier: GPL-2.0
10 #include "sifive-prci.h"
11 #include "fu540-prci.h"
12 #include "fu740-prci.h"
19  * __prci_readl() - read from a PRCI register
33 	return readl_relaxed(pd->va + offs);  in __prci_readl()
38 	writel_relaxed(v, pd->va + offs);  in __prci_writel()
41 /* WRPLL-related private functions */
44  * __prci_wrpll_unpack() - unpack WRPLL configuration registers into parameters
48  * Given a value @r read from an FU740 PRCI PLL configuration register,
63 	c->divr = v;  in __prci_wrpll_unpack()
67 	c->divf = v;  in __prci_wrpll_unpack()
71 	c->divq = v;  in __prci_wrpll_unpack()
75 	c->range = v;  in __prci_wrpll_unpack()
77 	c->flags &=  in __prci_wrpll_unpack()
81 	c->flags |= WRPLL_FLAGS_INT_FEEDBACK_MASK;  in __prci_wrpll_unpack()
85  * __prci_wrpll_pack() - pack PLL configuration parameters into a register value
103 	r |= c->divr << PRCI_COREPLLCFG0_DIVR_SHIFT;  in __prci_wrpll_pack()
104 	r |= c->divf << PRCI_COREPLLCFG0_DIVF_SHIFT;  in __prci_wrpll_pack()
105 	r |= c->divq << PRCI_COREPLLCFG0_DIVQ_SHIFT;  in __prci_wrpll_pack()
106 	r |= c->range << PRCI_COREPLLCFG0_RANGE_SHIFT;  in __prci_wrpll_pack()
115  * __prci_wrpll_read_cfg0() - read the WRPLL configuration from the PRCI
129 	__prci_wrpll_unpack(&pwd->c, __prci_readl(pd, pwd->cfg0_offs));  in __prci_wrpll_read_cfg0()
133  * __prci_wrpll_write_cfg0() - write WRPLL configuration into the PRCI
150 	__prci_writel(__prci_wrpll_pack(c), pwd->cfg0_offs, pd);  in __prci_wrpll_write_cfg0()
152 	memcpy(&pwd->c, c, sizeof(*c));  in __prci_wrpll_write_cfg0()
156  * __prci_wrpll_write_cfg1() - write Clock enable/disable configuration
166 	__prci_writel(enable, pwd->cfg1_offs, pd);  in __prci_wrpll_write_cfg1()
180 	struct __prci_wrpll_data *pwd = pc->pwd;  in sifive_prci_wrpll_recalc_rate()
182 	return wrpll_calc_output_rate(&pwd->c, parent_rate);  in sifive_prci_wrpll_recalc_rate()
190 	struct __prci_wrpll_data *pwd = pc->pwd;  in sifive_prci_wrpll_round_rate()
193 	memcpy(&c, &pwd->c, sizeof(c));  in sifive_prci_wrpll_round_rate()
204 	struct __prci_wrpll_data *pwd = pc->pwd;  in sifive_prci_wrpll_set_rate()
205 	struct __prci_data *pd = pc->pd;  in sifive_prci_wrpll_set_rate()
208 	r = wrpll_configure_for_rate(&pwd->c, rate, parent_rate);  in sifive_prci_wrpll_set_rate()
212 	if (pwd->enable_bypass)  in sifive_prci_wrpll_set_rate()
213 		pwd->enable_bypass(pd);  in sifive_prci_wrpll_set_rate()
215 	__prci_wrpll_write_cfg0(pd, pwd, &pwd->c);  in sifive_prci_wrpll_set_rate()
217 	udelay(wrpll_calc_max_lock_us(&pwd->c));  in sifive_prci_wrpll_set_rate()
225 	struct __prci_wrpll_data *pwd = pc->pwd;  in sifive_clk_is_enabled()
226 	struct __prci_data *pd = pc->pd;  in sifive_clk_is_enabled()
229 	r = __prci_readl(pd, pwd->cfg1_offs);  in sifive_clk_is_enabled()
240 	struct __prci_wrpll_data *pwd = pc->pwd;  in sifive_prci_clock_enable()
241 	struct __prci_data *pd = pc->pd;  in sifive_prci_clock_enable()
248 	if (pwd->disable_bypass)  in sifive_prci_clock_enable()
249 		pwd->disable_bypass(pd);  in sifive_prci_clock_enable()
257 	struct __prci_wrpll_data *pwd = pc->pwd;  in sifive_prci_clock_disable()
258 	struct __prci_data *pd = pc->pd;  in sifive_prci_clock_disable()
261 	if (pwd->enable_bypass)  in sifive_prci_clock_disable()
262 		pwd->enable_bypass(pd);  in sifive_prci_clock_disable()
264 	r = __prci_readl(pd, pwd->cfg1_offs);  in sifive_prci_clock_disable()
276 	struct __prci_data *pd = pc->pd;  in sifive_prci_tlclksel_recalc_rate()
293 	struct __prci_data *pd = pc->pd;  in sifive_prci_hfpclkplldiv_recalc_rate()
304  * sifive_prci_coreclksel_use_hfclk() - switch the CORECLK mux to output HFCLK
324  * sifive_prci_coreclksel_use_corepll() - switch the CORECLK mux to output
345  * sifive_prci_coreclksel_use_final_corepll() - switch the CORECLK mux to output
367  * sifive_prci_corepllsel_use_dvfscorepll() - switch the COREPLL mux to
388  * sifive_prci_corepllsel_use_corepll() - switch the COREPLL mux to
409  * sifive_prci_hfpclkpllsel_use_hfclk() - switch the HFPCLKPLL mux to
430  * sifive_prci_hfpclkpllsel_use_hfpclkpll() - switch the HFPCLKPLL mux to
450 /* PCIE AUX clock APIs for enable, disable. */
454 	struct __prci_data *pd = pc->pd;  in sifive_prci_pcie_aux_clock_is_enabled()
468 	struct __prci_data *pd = pc->pd;  in sifive_prci_pcie_aux_clock_enable()
483 	struct __prci_data *pd = pc->pd;  in sifive_prci_pcie_aux_clock_disable()
492  * __prci_register_clocks() - register clock controls in the PRCI
494  * @pd: The pointer for PRCI per-device instance data
509 	parent_count = of_clk_get_parent_count(dev->of_node);  in __prci_register_clocks()
513 		return -EINVAL;  in __prci_register_clocks()
517 	for (i = 0; i < desc->num_clks; ++i) {  in __prci_register_clocks()
518 		pic = &(desc->clks[i]);  in __prci_register_clocks()
520 		init.name = pic->name;  in __prci_register_clocks()
521 		init.parent_names = &pic->parent_name;  in __prci_register_clocks()
523 		init.ops = pic->ops;  in __prci_register_clocks()
524 		pic->hw.init = &init;  in __prci_register_clocks()
526 		pic->pd = pd;  in __prci_register_clocks()
528 		if (pic->pwd)  in __prci_register_clocks()
529 			__prci_wrpll_read_cfg0(pd, pic->pwd);  in __prci_register_clocks()
531 		r = devm_clk_hw_register(dev, &pic->hw);  in __prci_register_clocks()
538 		pd->hw_clks.hws[i] = &pic->hw;  in __prci_register_clocks()
541 	pd->hw_clks.num = i;  in __prci_register_clocks()
544 					&pd->hw_clks);  in __prci_register_clocks()
554  * sifive_prci_probe() - initialize prci data and check parent count
561 	struct device *dev = &pdev->dev;  in sifive_prci_probe()
566 	desc = of_device_get_match_data(&pdev->dev);  in sifive_prci_probe()
568 	pd = devm_kzalloc(dev, struct_size(pd, hw_clks.hws, desc->num_clks), GFP_KERNEL);  in sifive_prci_probe()
570 		return -ENOMEM;  in sifive_prci_probe()
572 	pd->va = devm_platform_ioremap_resource(pdev, 0);  in sifive_prci_probe()
573 	if (IS_ERR(pd->va))  in sifive_prci_probe()
574 		return PTR_ERR(pd->va);  in sifive_prci_probe()
576 	pd->reset.rcdev.owner = THIS_MODULE;  in sifive_prci_probe()
577 	pd->reset.rcdev.nr_resets = PRCI_RST_NR;  in sifive_prci_probe()
578 	pd->reset.rcdev.ops = &reset_simple_ops;  in sifive_prci_probe()
579 	pd->reset.rcdev.of_node = pdev->dev.of_node;  in sifive_prci_probe()
580 	pd->reset.active_low = true;  in sifive_prci_probe()
581 	pd->reset.membase = pd->va + PRCI_DEVICESRESETREG_OFFSET;  in sifive_prci_probe()
582 	spin_lock_init(&pd->reset.lock);  in sifive_prci_probe()
584 	r = devm_reset_controller_register(&pdev->dev, &pd->reset.rcdev);  in sifive_prci_probe()
601 	{.compatible = "sifive,fu540-c000-prci", .data = &prci_clk_fu540},
602 	{.compatible = "sifive,fu740-c000-prci", .data = &prci_clk_fu740},
608 		.name = "sifive-clk-prci",