1 // SPDX-License-Identifier: GPL-2.0-only
7  * Tero Kristo <t-[email protected]>
11 #include <linux/clk.h>
12 #include <linux/clk-provider.h>
14 #include <linux/clk/ti.h>
45 	struct clk_iomap *io = clk_memmaps[reg->index];  in clk_memmap_writel()
47 	if (reg->ptr)  in clk_memmap_writel()
48 		writel_relaxed(val, reg->ptr);  in clk_memmap_writel()
49 	else if (io->regmap)  in clk_memmap_writel()
50 		regmap_write(io->regmap, reg->offset, val);  in clk_memmap_writel()
52 		writel_relaxed(val, io->mem + reg->offset);  in clk_memmap_writel()
67 	struct clk_iomap *io = clk_memmaps[reg->index];  in clk_memmap_rmw()
69 	if (reg->ptr) {  in clk_memmap_rmw()
70 		_clk_rmw(val, mask, reg->ptr);  in clk_memmap_rmw()
71 	} else if (io->regmap) {  in clk_memmap_rmw()
72 		regmap_update_bits(io->regmap, reg->offset, mask, val);  in clk_memmap_rmw()
74 		_clk_rmw(val, mask, io->mem + reg->offset);  in clk_memmap_rmw()
81 	struct clk_iomap *io = clk_memmaps[reg->index];  in clk_memmap_readl()
83 	if (reg->ptr)  in clk_memmap_readl()
84 		val = readl_relaxed(reg->ptr);  in clk_memmap_readl()
85 	else if (io->regmap)  in clk_memmap_readl()
86 		regmap_read(io->regmap, reg->offset, &val);  in clk_memmap_readl()
88 		val = readl_relaxed(io->mem + reg->offset);  in clk_memmap_readl()
94  * ti_clk_setup_ll_ops - setup low level clock operations
99  * specific code. Returns 0 on success, -EBUSY if ll_ops have been
106 		return -EBUSY;  in ti_clk_setup_ll_ops()
110 	ops->clk_readl = clk_memmap_readl;  in ti_clk_setup_ll_ops()
111 	ops->clk_writel = clk_memmap_writel;  in ti_clk_setup_ll_ops()
112 	ops->clk_rmw = clk_memmap_rmw;  in ti_clk_setup_ll_ops()
118  * Eventually we could standardize to using '_' for clk-*.c files to follow the
130 	tmp = kstrdup_and_replace(name, '-', '_', GFP_KERNEL);  in ti_find_clock_provider()
139 	/* Node named "clock" with "clock-output-names" */  in ti_find_clock_provider()
141 		if (of_property_read_string_index(np, "clock-output-names",  in ti_find_clock_provider()
162  * ti_dt_clocks_register - register DT alias clocks during boot
165  * Register alias or non-standard DT clock entries during boot. By
166  * default, DT clocks are found based on their clock-output-names
168  * additional con-id / dev-id -> clock mapping is required, use this
174 	struct device_node *node, *parent, *child;  in ti_dt_clocks_register()  local
175 	struct clk *clk;  in ti_dt_clocks_register()  local
187 	compat_mode = ti_clk_get_features()->flags & TI_CLK_CLKCTRL_COMPAT;  in ti_dt_clocks_register()
189 	for (c = oclks; c->node_name != NULL; c++) {  in ti_dt_clocks_register()
190 		strcpy(buf, c->node_name);  in ti_dt_clocks_register()
199 						c->node_name);  in ti_dt_clocks_register()
213 			parent = node;  in ti_dt_clocks_register()
214 			child = of_get_child_by_name(parent, "clock");  in ti_dt_clocks_register()
216 				child = of_get_child_by_name(parent, "clk");  in ti_dt_clocks_register()
218 				of_node_put(parent);  in ti_dt_clocks_register()
229 					c->node_name, i, tags[i]);  in ti_dt_clocks_register()
234 		clk = of_clk_get_from_provider(&clkspec);  in ti_dt_clocks_register()
236 		if (!IS_ERR(clk)) {  in ti_dt_clocks_register()
237 			c->lk.clk = clk;  in ti_dt_clocks_register()
238 			clkdev_add(&c->lk);  in ti_dt_clocks_register()
257 				c->node_name, PTR_ERR(clk));  in ti_dt_clocks_register()
272  * ti_clk_retry_init - retries a failed clock init at later phase
288 		return -ENOMEM;  in ti_clk_retry_init()
290 	retry->node = node;  in ti_clk_retry_init()
291 	retry->func = func;  in ti_clk_retry_init()
292 	retry->user = user;  in ti_clk_retry_init()
293 	list_add(&retry->link, &retry_list);  in ti_clk_retry_init()
299  * ti_clk_get_reg_addr - get register address for a clock register
316 		if (clocks_node_ptr[i] == node->parent)  in ti_clk_get_reg_addr()
318 		if (clocks_node_ptr[i] == node->parent->parent)  in ti_clk_get_reg_addr()
323 		pr_err("clk-provider not found for %pOFn!\n", node);  in ti_clk_get_reg_addr()
324 		return -ENOENT;  in ti_clk_get_reg_addr()
327 	reg->index = i;  in ti_clk_get_reg_addr()
329 	if (of_device_is_compatible(node->parent, "ti,clksel")) {  in ti_clk_get_reg_addr()
330 		err = of_property_read_u32_index(node->parent, "reg", index, &clksel_addr);  in ti_clk_get_reg_addr()
332 			pr_err("%pOFn parent clksel must have reg[%d]!\n", node, index);  in ti_clk_get_reg_addr()
333 			return -EINVAL;  in ti_clk_get_reg_addr()
340 		/* Legacy clksel with no reg and a possible ti,bit-shift property */  in ti_clk_get_reg_addr()
341 		reg->offset = clksel_addr;  in ti_clk_get_reg_addr()
342 		reg->bit = ti_clk_get_legacy_bit_shift(node);  in ti_clk_get_reg_addr()
343 		reg->ptr = NULL;  in ti_clk_get_reg_addr()
350 		reg->offset = clksel_addr;  in ti_clk_get_reg_addr()
351 		reg->bit = val;  in ti_clk_get_reg_addr()
352 		reg->ptr = NULL;  in ti_clk_get_reg_addr()
356 	/* Other clocks that may or may not have ti,bit-shift property  */  in ti_clk_get_reg_addr()
357 	reg->offset = val;  in ti_clk_get_reg_addr()
358 	reg->bit = ti_clk_get_legacy_bit_shift(node);  in ti_clk_get_reg_addr()
359 	reg->ptr = NULL;  in ti_clk_get_reg_addr()
365  * ti_clk_get_legacy_bit_shift - get bit shift for a clock register
368  * Gets the clock register bit shift using the legacy ti,bit-shift
378 	err = of_property_read_u32(node, "ti,bit-shift", &val);  in ti_clk_get_legacy_bit_shift()
394 	ti_clk_ll_ops->clk_rmw(latch, latch, reg);  in ti_clk_latch()
395 	ti_clk_ll_ops->clk_rmw(0, latch, reg);  in ti_clk_latch()
396 	ti_clk_ll_ops->clk_readl(reg); /* OCP barrier */  in ti_clk_latch()
400  * omap2_clk_provider_init - init master clock provider
401  * @parent: master node
413 int __init omap2_clk_provider_init(struct device_node *parent, int index,  in omap2_clk_provider_init()  argument
419 	/* get clocks for this parent */  in omap2_clk_provider_init()
420 	clocks = of_get_child_by_name(parent, "clocks");  in omap2_clk_provider_init()
422 		pr_err("%pOFn missing 'clocks' child node.\n", parent);  in omap2_clk_provider_init()
423 		return -EINVAL;  in omap2_clk_provider_init()
431 		return -ENOMEM;  in omap2_clk_provider_init()
433 	io->regmap = syscon;  in omap2_clk_provider_init()
434 	io->mem = mem;  in omap2_clk_provider_init()
442  * omap2_clk_legacy_provider_init - initialize a legacy clock provider
454 	io->mem = mem;  in omap2_clk_legacy_provider_init()
460  * ti_dt_clk_init_retry_clks - init clocks from the retry list
463  * reasons being missing parent node(s) during earlier init. This
465  * parent clocks ready during init.
475 			pr_debug("retry-init: %pOFn\n", retry->node);  in ti_dt_clk_init_retry_clks()
476 			retry->func(retry->user, retry->node);  in ti_dt_clk_init_retry_clks()
477 			list_del(&retry->link);  in ti_dt_clk_init_retry_clks()
480 		retries--;  in ti_dt_clk_init_retry_clks()
485 	{ .compatible = "fixed-clock" },
486 	{ .compatible = "fixed-factor-clock" },
491  * ti_dt_clk_name - init clock name from first output name or node name
494  * Use the first clock-output-name for the clock name if found. Fall back
501 	if (!of_property_read_string_index(np, "clock-output-names", 0,  in ti_dt_clk_name()
505 	return np->name;  in ti_dt_clk_name()
509  * ti_clk_add_aliases - setup clock aliases
516 	struct clk *clk;  in ti_clk_add_aliases()  local
522 		clk = of_clk_get_from_provider(&clkspec);  in ti_clk_add_aliases()
524 		ti_clk_add_alias(clk, ti_dt_clk_name(np));  in ti_clk_add_aliases()
529  * ti_clk_setup_features - setup clock features flags
541  * ti_clk_get_features - get clock driver features flags
552  * omap2_clk_enable_init_clocks - prepare & enable a list of clocks
563 	struct clk *init_clk;  in omap2_clk_enable_init_clocks()
576  * ti_clk_add_alias - add a clock alias for a TI clock
577  * @clk: clock handle to create alias for
584 int ti_clk_add_alias(struct clk *clk, const char *con)  in ti_clk_add_alias()  argument
588 	if (!clk)  in ti_clk_add_alias()
591 	if (IS_ERR(clk))  in ti_clk_add_alias()
592 		return PTR_ERR(clk);  in ti_clk_add_alias()
596 		return -ENOMEM;  in ti_clk_add_alias()
598 	cl->con_id = con;  in ti_clk_add_alias()
599 	cl->clk = clk;  in ti_clk_add_alias()
607  * of_ti_clk_register - register a TI clock to the common clock framework
616 struct clk *of_ti_clk_register(struct device_node *node, struct clk_hw *hw,  in of_ti_clk_register()
619 	struct clk *clk;  in of_ti_clk_register()  local
626 	clk = hw->clk;  in of_ti_clk_register()
627 	ret = ti_clk_add_alias(clk, con);  in of_ti_clk_register()
629 		clk_unregister(clk);  in of_ti_clk_register()
633 	return clk;  in of_ti_clk_register()
637  * of_ti_clk_register_omap_hw - register a clk_hw_omap to the clock framework
647 struct clk *of_ti_clk_register_omap_hw(struct device_node *node,  in of_ti_clk_register_omap_hw()
650 	struct clk *clk;  in of_ti_clk_register_omap_hw()  local
653 	clk = of_ti_clk_register(node, hw, con);  in of_ti_clk_register_omap_hw()
654 	if (IS_ERR(clk))  in of_ti_clk_register_omap_hw()
655 		return clk;  in of_ti_clk_register_omap_hw()
659 	list_add(&oclk->node, &clk_hw_omap_clocks);  in of_ti_clk_register_omap_hw()
661 	return clk;  in of_ti_clk_register_omap_hw()
665  * omap2_clk_for_each - call function for each registered clk_hw_omap
670  * failure.  If @fn returns non-zero, the iteration across clocks
671  * will stop and the non-zero return value will be passed to the
689  * omap2_clk_is_hw_omap - check if the provided clk_hw is OMAP clock
700 		if (&oclk->hw == hw)  in omap2_clk_is_hw_omap()