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170 lines
5.5 KiB
170 lines
5.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright 2015 Maxime Ripard |
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* |
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* Maxime Ripard <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/clk-provider.h> |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/slab.h> |
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#include <linux/spinlock.h> |
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static DEFINE_SPINLOCK(gates_lock); |
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static void __init sunxi_simple_gates_setup(struct device_node *node, |
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const int protected[], |
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int nprotected) |
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{ |
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struct clk_onecell_data *clk_data; |
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const char *clk_parent, *clk_name; |
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struct property *prop; |
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struct resource res; |
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void __iomem *clk_reg; |
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void __iomem *reg; |
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const __be32 *p; |
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int number, i = 0, j; |
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u8 clk_bit; |
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u32 index; |
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reg = of_io_request_and_map(node, 0, of_node_full_name(node)); |
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if (IS_ERR(reg)) |
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return; |
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clk_parent = of_clk_get_parent_name(node, 0); |
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clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); |
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if (!clk_data) |
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goto err_unmap; |
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number = of_property_count_u32_elems(node, "clock-indices"); |
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of_property_read_u32_index(node, "clock-indices", number - 1, &number); |
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clk_data->clks = kcalloc(number + 1, sizeof(struct clk *), GFP_KERNEL); |
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if (!clk_data->clks) |
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goto err_free_data; |
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of_property_for_each_u32(node, "clock-indices", prop, p, index) { |
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of_property_read_string_index(node, "clock-output-names", |
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i, &clk_name); |
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clk_reg = reg + 4 * (index / 32); |
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clk_bit = index % 32; |
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clk_data->clks[index] = clk_register_gate(NULL, clk_name, |
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clk_parent, 0, |
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clk_reg, |
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clk_bit, |
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0, &gates_lock); |
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i++; |
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if (IS_ERR(clk_data->clks[index])) { |
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WARN_ON(true); |
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continue; |
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} |
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for (j = 0; j < nprotected; j++) |
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if (protected[j] == index) |
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clk_prepare_enable(clk_data->clks[index]); |
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} |
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clk_data->clk_num = number + 1; |
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of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); |
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return; |
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err_free_data: |
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kfree(clk_data); |
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err_unmap: |
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iounmap(reg); |
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of_address_to_resource(node, 0, &res); |
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release_mem_region(res.start, resource_size(&res)); |
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} |
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static void __init sunxi_simple_gates_init(struct device_node *node) |
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{ |
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sunxi_simple_gates_setup(node, NULL, 0); |
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} |
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CLK_OF_DECLARE(sun4i_a10_gates, "allwinner,sun4i-a10-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun4i_a10_apb0, "allwinner,sun4i-a10-apb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun4i_a10_apb1, "allwinner,sun4i-a10-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun4i_a10_axi, "allwinner,sun4i-a10-axi-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun5i_a10s_apb0, "allwinner,sun5i-a10s-apb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun5i_a10s_apb1, "allwinner,sun5i-a10s-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun5i_a13_apb0, "allwinner,sun5i-a13-apb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun5i_a13_apb1, "allwinner,sun5i-a13-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun6i_a31_ahb1, "allwinner,sun6i-a31-ahb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun6i_a31_apb1, "allwinner,sun6i-a31-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun6i_a31_apb2, "allwinner,sun6i-a31-apb2-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun7i_a20_apb0, "allwinner,sun7i-a20-apb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun7i_a20_apb1, "allwinner,sun7i-a20-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun8i_a23_ahb1, "allwinner,sun8i-a23-ahb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun8i_a23_apb1, "allwinner,sun8i-a23-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun8i_a23_apb2, "allwinner,sun8i-a23-apb2-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun8i_a33_ahb1, "allwinner,sun8i-a33-ahb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun8i_a83t_apb0, "allwinner,sun8i-a83t-apb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun9i_a80_ahb0, "allwinner,sun9i-a80-ahb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun9i_a80_ahb1, "allwinner,sun9i-a80-ahb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun9i_a80_ahb2, "allwinner,sun9i-a80-ahb2-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun9i_a80_apb0, "allwinner,sun9i-a80-apb0-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun9i_a80_apb1, "allwinner,sun9i-a80-apb1-gates-clk", |
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sunxi_simple_gates_init); |
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CLK_OF_DECLARE(sun9i_a80_apbs, "allwinner,sun9i-a80-apbs-gates-clk", |
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sunxi_simple_gates_init); |
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static const int sun4i_a10_ahb_critical_clocks[] __initconst = { |
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14, /* ahb_sdram */ |
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}; |
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static void __init sun4i_a10_ahb_init(struct device_node *node) |
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{ |
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sunxi_simple_gates_setup(node, sun4i_a10_ahb_critical_clocks, |
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ARRAY_SIZE(sun4i_a10_ahb_critical_clocks)); |
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} |
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CLK_OF_DECLARE(sun4i_a10_ahb, "allwinner,sun4i-a10-ahb-gates-clk", |
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sun4i_a10_ahb_init); |
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CLK_OF_DECLARE(sun5i_a10s_ahb, "allwinner,sun5i-a10s-ahb-gates-clk", |
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sun4i_a10_ahb_init); |
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CLK_OF_DECLARE(sun5i_a13_ahb, "allwinner,sun5i-a13-ahb-gates-clk", |
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sun4i_a10_ahb_init); |
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CLK_OF_DECLARE(sun7i_a20_ahb, "allwinner,sun7i-a20-ahb-gates-clk", |
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sun4i_a10_ahb_init); |
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static const int sun4i_a10_dram_critical_clocks[] __initconst = { |
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15, /* dram_output */ |
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}; |
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static void __init sun4i_a10_dram_init(struct device_node *node) |
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{ |
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sunxi_simple_gates_setup(node, sun4i_a10_dram_critical_clocks, |
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ARRAY_SIZE(sun4i_a10_dram_critical_clocks)); |
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} |
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CLK_OF_DECLARE(sun4i_a10_dram, "allwinner,sun4i-a10-dram-gates-clk", |
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sun4i_a10_dram_init);
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