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98 lines
2.5 KiB
98 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and |
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* Versatile PB boards. |
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* Copyright (C) 2012 Linus Walleij |
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*/ |
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#include <linux/clk-provider.h> |
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#include <linux/err.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include "icst.h" |
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#include "clk-icst.h" |
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#define INTEGRATOR_HDR_LOCK_OFFSET 0x14 |
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#define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c |
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#define VERSATILE_SYS_LOCK_OFFSET 0x20 |
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/* Base offset for the core module */ |
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static void __iomem *cm_base; |
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static const struct icst_params cp_auxosc_params = { |
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.vco_max = ICST525_VCO_MAX_5V, |
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.vco_min = ICST525_VCO_MIN, |
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.vd_min = 8, |
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.vd_max = 263, |
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.rd_min = 3, |
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.rd_max = 65, |
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.s2div = icst525_s2div, |
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.idx2s = icst525_idx2s, |
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}; |
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static const struct clk_icst_desc cm_auxosc_desc __initconst = { |
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.params = &cp_auxosc_params, |
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.vco_offset = 0x1c, |
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.lock_offset = INTEGRATOR_HDR_LOCK_OFFSET, |
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}; |
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static const struct icst_params versatile_auxosc_params = { |
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.vco_max = ICST307_VCO_MAX, |
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.vco_min = ICST307_VCO_MIN, |
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.vd_min = 4 + 8, |
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.vd_max = 511 + 8, |
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.rd_min = 1 + 2, |
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.rd_max = 127 + 2, |
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.s2div = icst307_s2div, |
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.idx2s = icst307_idx2s, |
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}; |
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static const struct clk_icst_desc versatile_auxosc_desc __initconst = { |
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.params = &versatile_auxosc_params, |
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.vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET, |
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.lock_offset = VERSATILE_SYS_LOCK_OFFSET, |
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}; |
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static void __init cm_osc_setup(struct device_node *np, |
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const struct clk_icst_desc *desc) |
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{ |
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struct clk *clk; |
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const char *clk_name = np->name; |
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const char *parent_name; |
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if (!cm_base) { |
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/* Remap the core module base if not done yet */ |
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struct device_node *parent; |
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parent = of_get_parent(np); |
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if (!parent) { |
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pr_err("no parent on core module clock\n"); |
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return; |
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} |
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cm_base = of_iomap(parent, 0); |
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of_node_put(parent); |
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if (!cm_base) { |
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pr_err("could not remap core module base\n"); |
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return; |
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} |
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} |
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parent_name = of_clk_get_parent_name(np, 0); |
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clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base); |
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if (!IS_ERR(clk)) |
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of_clk_add_provider(np, of_clk_src_simple_get, clk); |
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} |
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static void __init of_integrator_cm_osc_setup(struct device_node *np) |
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{ |
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cm_osc_setup(np, &cm_auxosc_desc); |
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} |
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CLK_OF_DECLARE(integrator_cm_auxosc_clk, |
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"arm,integrator-cm-auxosc", of_integrator_cm_osc_setup); |
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static void __init of_versatile_cm_osc_setup(struct device_node *np) |
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{ |
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cm_osc_setup(np, &versatile_auxosc_desc); |
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} |
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CLK_OF_DECLARE(versatile_cm_auxosc_clk, |
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"arm,versatile-cm-auxosc", of_versatile_cm_osc_setup);
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