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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright 2015 Maxime Ripard4 *5 * Maxime Ripard <maxime.ripard@free-electrons.com>6 */7 8#include <linux/clk-provider.h>9#include <linux/io.h>10#include <linux/of.h>11#include <linux/of_address.h>12#include <linux/slab.h>13#include <linux/spinlock.h>14 15#define SUN4I_A10_PLL3_GATE_BIT	3116#define SUN4I_A10_PLL3_DIV_WIDTH	717#define SUN4I_A10_PLL3_DIV_SHIFT	018 19static DEFINE_SPINLOCK(sun4i_a10_pll3_lock);20 21static void __init sun4i_a10_pll3_setup(struct device_node *node)22{23	const char *clk_name = node->name, *parent;24	struct clk_multiplier *mult;25	struct clk_gate *gate;26	struct resource res;27	void __iomem *reg;28	struct clk *clk;29	int ret;30 31	of_property_read_string(node, "clock-output-names", &clk_name);32	parent = of_clk_get_parent_name(node, 0);33 34	reg = of_io_request_and_map(node, 0, of_node_full_name(node));35	if (IS_ERR(reg)) {36		pr_err("%s: Could not map the clock registers\n", clk_name);37		return;38	}39 40	gate = kzalloc(sizeof(*gate), GFP_KERNEL);41	if (!gate)42		goto err_unmap;43 44	gate->reg = reg;45	gate->bit_idx = SUN4I_A10_PLL3_GATE_BIT;46	gate->lock = &sun4i_a10_pll3_lock;47 48	mult = kzalloc(sizeof(*mult), GFP_KERNEL);49	if (!mult)50		goto err_free_gate;51 52	mult->reg = reg;53	mult->shift = SUN4I_A10_PLL3_DIV_SHIFT;54	mult->width = SUN4I_A10_PLL3_DIV_WIDTH;55	mult->lock = &sun4i_a10_pll3_lock;56 57	clk = clk_register_composite(NULL, clk_name,58				     &parent, 1,59				     NULL, NULL,60				     &mult->hw, &clk_multiplier_ops,61				     &gate->hw, &clk_gate_ops,62				     0);63	if (IS_ERR(clk)) {64		pr_err("%s: Couldn't register the clock\n", clk_name);65		goto err_free_mult;66	}67 68	ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);69	if (ret) {70		pr_err("%s: Couldn't register DT provider\n",71		       clk_name);72		goto err_clk_unregister;73	}74 75	return;76 77err_clk_unregister:78	clk_unregister_composite(clk);79err_free_mult:80	kfree(mult);81err_free_gate:82	kfree(gate);83err_unmap:84	iounmap(reg);85	of_address_to_resource(node, 0, &res);86	release_mem_region(res.start, resource_size(&res));87}88 89CLK_OF_DECLARE(sun4i_a10_pll3, "allwinner,sun4i-a10-pll3-clk",90	       sun4i_a10_pll3_setup);91