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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