// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2013 Emilio López * * Emilio López <emilio@elopez.com.ar> */ #include <linux/clk-provider.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/slab.h> #define SUNXI_OSC24M_GATE 0 static DEFINE_SPINLOCK(hosc_lock); static void __init sun4i_osc_clk_setup(struct device_node *node) { struct clk *clk; struct clk_fixed_rate *fixed; struct clk_gate *gate; const char *clk_name = node->name; u32 rate; if (of_property_read_u32(node, "clock-frequency", &rate)) return; /* allocate fixed-rate and gate clock structs */ fixed = kzalloc(sizeof(struct clk_fixed_rate), GFP_KERNEL); if (!fixed) return; gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); if (!gate) goto err_free_fixed; of_property_read_string(node, "clock-output-names", &clk_name); /* set up gate and fixed rate properties */ gate->reg = of_iomap(node, 0); gate->bit_idx = SUNXI_OSC24M_GATE; gate->lock = &hosc_lock; fixed->fixed_rate = rate; clk = clk_register_composite(NULL, clk_name, NULL, 0, NULL, NULL, &fixed->hw, &clk_fixed_rate_ops, &gate->hw, &clk_gate_ops, 0); if (IS_ERR(clk)) goto err_free_gate; of_clk_add_provider(node, of_clk_src_simple_get, clk); return; err_free_gate: kfree(gate); err_free_fixed: kfree(fixed); } CLK_OF_DECLARE(sun4i_osc, "allwinner,sun4i-a10-osc-clk", sun4i_osc_clk_setup);