1 // SPDX-License-Identifier: GPL-2.0-only
7  * Tero Kristo <t-kristo@ti.com>
10 #include <linux/clk.h>
11 #include <linux/clk-provider.h>
13 #include <linux/clk/ti.h>
43 	struct clk_iomap *io = clk_memmaps[reg->index];  in clk_memmap_writel()
45 	if (reg->ptr)  in clk_memmap_writel()
46 		writel_relaxed(val, reg->ptr);  in clk_memmap_writel()
47 	else if (io->regmap)  in clk_memmap_writel()
48 		regmap_write(io->regmap, reg->offset, val);  in clk_memmap_writel()
50 		writel_relaxed(val, io->mem + reg->offset);  in clk_memmap_writel()
65 	struct clk_iomap *io = clk_memmaps[reg->index];  in clk_memmap_rmw()
67 	if (reg->ptr) {  in clk_memmap_rmw()
68 		_clk_rmw(val, mask, reg->ptr);  in clk_memmap_rmw()
69 	} else if (io->regmap) {  in clk_memmap_rmw()
70 		regmap_update_bits(io->regmap, reg->offset, mask, val);  in clk_memmap_rmw()
72 		_clk_rmw(val, mask, io->mem + reg->offset);  in clk_memmap_rmw()
79 	struct clk_iomap *io = clk_memmaps[reg->index];  in clk_memmap_readl()
81 	if (reg->ptr)  in clk_memmap_readl()
82 		val = readl_relaxed(reg->ptr);  in clk_memmap_readl()
83 	else if (io->regmap)  in clk_memmap_readl()
84 		regmap_read(io->regmap, reg->offset, &val);  in clk_memmap_readl()
86 		val = readl_relaxed(io->mem + reg->offset);  in clk_memmap_readl()
92  * ti_clk_setup_ll_ops - setup low level clock operations
97  * specific code. Returns 0 on success, -EBUSY if ll_ops have been
104 		return -EBUSY;  in ti_clk_setup_ll_ops()
108 	ops->clk_readl = clk_memmap_readl;  in ti_clk_setup_ll_ops()
109 	ops->clk_writel = clk_memmap_writel;  in ti_clk_setup_ll_ops()
110 	ops->clk_rmw = clk_memmap_rmw;  in ti_clk_setup_ll_ops()
116  * Eventually we could standardize to using '_' for clk-*.c files to follow the
127 	tmp = kstrdup_and_replace(name, '-', '_', GFP_KERNEL);  in ti_find_clock_provider()
131 	/* Node named "clock" with "clock-output-names" */  in ti_find_clock_provider()
133 		if (of_property_read_string_index(np, "clock-output-names",  in ti_find_clock_provider()
150 	/* Fall back to using old node name base provider name */  in ti_find_clock_provider()
155  * ti_dt_clocks_register - register DT alias clocks during boot
158  * Register alias or non-standard DT clock entries during boot. By
159  * default, DT clocks are found based on their clock-output-names
161  * additional con-id / dev-id -> clock mapping is required, use this
168 	struct clk *clk;  in ti_dt_clocks_register()  local
180 	compat_mode = ti_clk_get_features()->flags & TI_CLK_CLKCTRL_COMPAT;  in ti_dt_clocks_register()
182 	for (c = oclks; c->node_name != NULL; c++) {  in ti_dt_clocks_register()
183 		strcpy(buf, c->node_name);  in ti_dt_clocks_register()
192 						c->node_name);  in ti_dt_clocks_register()
209 				child = of_get_child_by_name(parent, "clk");  in ti_dt_clocks_register()
222 					c->node_name, i, tags[i]);  in ti_dt_clocks_register()
227 		clk = of_clk_get_from_provider(&clkspec);  in ti_dt_clocks_register()
229 		if (!IS_ERR(clk)) {  in ti_dt_clocks_register()
230 			c->lk.clk = clk;  in ti_dt_clocks_register()
231 			clkdev_add(&c->lk);  in ti_dt_clocks_register()
250 				c->node_name, PTR_ERR(clk));  in ti_dt_clocks_register()
265  * ti_clk_retry_init - retries a failed clock init at later phase
281 		return -ENOMEM;  in ti_clk_retry_init()
283 	retry->node = node;  in ti_clk_retry_init()
284 	retry->func = func;  in ti_clk_retry_init()
285 	retry->user = user;  in ti_clk_retry_init()
286 	list_add(&retry->link, &retry_list);  in ti_clk_retry_init()
292  * ti_clk_get_reg_addr - get register address for a clock register
308 		if (clocks_node_ptr[i] == node->parent)  in ti_clk_get_reg_addr()
310 		if (clocks_node_ptr[i] == node->parent->parent)  in ti_clk_get_reg_addr()
315 		pr_err("clk-provider not found for %pOFn!\n", node);  in ti_clk_get_reg_addr()
316 		return -ENOENT;  in ti_clk_get_reg_addr()
319 	reg->index = i;  in ti_clk_get_reg_addr()
322 		if (of_property_read_u32_index(node->parent, "reg",  in ti_clk_get_reg_addr()
326 			return -EINVAL;  in ti_clk_get_reg_addr()
330 	reg->offset = val;  in ti_clk_get_reg_addr()
331 	reg->ptr = NULL;  in ti_clk_get_reg_addr()
345 	ti_clk_ll_ops->clk_rmw(latch, latch, reg);  in ti_clk_latch()
346 	ti_clk_ll_ops->clk_rmw(0, latch, reg);  in ti_clk_latch()
347 	ti_clk_ll_ops->clk_readl(reg); /* OCP barrier */  in ti_clk_latch()
351  * omap2_clk_provider_init - init master clock provider
355  * @mem: iomem pointer for the clock provider memory area, only used if
374 		return -EINVAL;  in omap2_clk_provider_init()
382 		return -ENOMEM;  in omap2_clk_provider_init()
384 	io->regmap = syscon;  in omap2_clk_provider_init()
385 	io->mem = mem;  in omap2_clk_provider_init()
393  * omap2_clk_legacy_provider_init - initialize a legacy clock provider
394  * @index: index for the clock provider
395  * @mem: iomem pointer for the clock provider memory area
397  * Initializes a legacy clock provider memory mapping.
408 	io->mem = mem;  in omap2_clk_legacy_provider_init()
414  * ti_dt_clk_init_retry_clks - init clocks from the retry list
429 			pr_debug("retry-init: %pOFn\n", retry->node);  in ti_dt_clk_init_retry_clks()
430 			retry->func(retry->user, retry->node);  in ti_dt_clk_init_retry_clks()
431 			list_del(&retry->link);  in ti_dt_clk_init_retry_clks()
434 		retries--;  in ti_dt_clk_init_retry_clks()
439 	{ .compatible = "fixed-clock" },
440 	{ .compatible = "fixed-factor-clock" },
445  * ti_dt_clk_name - init clock name from first output name or node name
448  * Use the first clock-output-name for the clock name if found. Fall back
455 	if (!of_property_read_string_index(np, "clock-output-names", 0,  in ti_dt_clk_name()
459 	return np->name;  in ti_dt_clk_name()
463  * ti_clk_add_aliases - setup clock aliases
470 	struct clk *clk;  in ti_clk_add_aliases()  local
476 		clk = of_clk_get_from_provider(&clkspec);  in ti_clk_add_aliases()
478 		ti_clk_add_alias(clk, ti_dt_clk_name(np));  in ti_clk_add_aliases()
483  * ti_clk_setup_features - setup clock features flags
495  * ti_clk_get_features - get clock driver features flags
506  * omap2_clk_enable_init_clocks - prepare & enable a list of clocks
517 	struct clk *init_clk;  in omap2_clk_enable_init_clocks()
530  * ti_clk_add_alias - add a clock alias for a TI clock
531  * @clk: clock handle to create alias for
538 int ti_clk_add_alias(struct clk *clk, const char *con)  in ti_clk_add_alias()  argument
542 	if (!clk)  in ti_clk_add_alias()
545 	if (IS_ERR(clk))  in ti_clk_add_alias()
546 		return PTR_ERR(clk);  in ti_clk_add_alias()
550 		return -ENOMEM;  in ti_clk_add_alias()
552 	cl->con_id = con;  in ti_clk_add_alias()
553 	cl->clk = clk;  in ti_clk_add_alias()
561  * of_ti_clk_register - register a TI clock to the common clock framework
570 struct clk *of_ti_clk_register(struct device_node *node, struct clk_hw *hw,  in of_ti_clk_register()
573 	struct clk *clk;  in of_ti_clk_register()  local
580 	clk = hw->clk;  in of_ti_clk_register()
581 	ret = ti_clk_add_alias(clk, con);  in of_ti_clk_register()
583 		clk_unregister(clk);  in of_ti_clk_register()
587 	return clk;  in of_ti_clk_register()
591  * of_ti_clk_register_omap_hw - register a clk_hw_omap to the clock framework
601 struct clk *of_ti_clk_register_omap_hw(struct device_node *node,  in of_ti_clk_register_omap_hw()
604 	struct clk *clk;  in of_ti_clk_register_omap_hw()  local
607 	clk = of_ti_clk_register(node, hw, con);  in of_ti_clk_register_omap_hw()
608 	if (IS_ERR(clk))  in of_ti_clk_register_omap_hw()
609 		return clk;  in of_ti_clk_register_omap_hw()
613 	list_add(&oclk->node, &clk_hw_omap_clocks);  in of_ti_clk_register_omap_hw()
615 	return clk;  in of_ti_clk_register_omap_hw()
619  * omap2_clk_for_each - call function for each registered clk_hw_omap
624  * failure.  If @fn returns non-zero, the iteration across clocks
625  * will stop and the non-zero return value will be passed to the
643  * omap2_clk_is_hw_omap - check if the provided clk_hw is OMAP clock
654 		if (&oclk->hw == hw)  in omap2_clk_is_hw_omap()