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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and4 * Versatile PB boards.5 * Copyright (C) 2012 Linus Walleij6 */7#include <linux/clk-provider.h>8#include <linux/err.h>9#include <linux/of.h>10#include <linux/of_address.h>11 12#include "icst.h"13#include "clk-icst.h"14 15#define INTEGRATOR_HDR_LOCK_OFFSET 0x1416 17#define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c18#define VERSATILE_SYS_LOCK_OFFSET 0x2019 20/* Base offset for the core module */21static void __iomem *cm_base;22 23static const struct icst_params cp_auxosc_params = {24 .vco_max = ICST525_VCO_MAX_5V,25 .vco_min = ICST525_VCO_MIN,26 .vd_min = 8,27 .vd_max = 263,28 .rd_min = 3,29 .rd_max = 65,30 .s2div = icst525_s2div,31 .idx2s = icst525_idx2s,32};33 34static const struct clk_icst_desc cm_auxosc_desc __initconst = {35 .params = &cp_auxosc_params,36 .vco_offset = 0x1c,37 .lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,38};39 40static const struct icst_params versatile_auxosc_params = {41 .vco_max = ICST307_VCO_MAX,42 .vco_min = ICST307_VCO_MIN,43 .vd_min = 4 + 8,44 .vd_max = 511 + 8,45 .rd_min = 1 + 2,46 .rd_max = 127 + 2,47 .s2div = icst307_s2div,48 .idx2s = icst307_idx2s,49};50 51static const struct clk_icst_desc versatile_auxosc_desc __initconst = {52 .params = &versatile_auxosc_params,53 .vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET,54 .lock_offset = VERSATILE_SYS_LOCK_OFFSET,55};56static void __init cm_osc_setup(struct device_node *np,57 const struct clk_icst_desc *desc)58{59 struct clk *clk;60 const char *clk_name = np->name;61 const char *parent_name;62 63 if (!cm_base) {64 /* Remap the core module base if not done yet */65 struct device_node *parent;66 67 parent = of_get_parent(np);68 if (!parent) {69 pr_err("no parent on core module clock\n");70 return;71 }72 cm_base = of_iomap(parent, 0);73 of_node_put(parent);74 if (!cm_base) {75 pr_err("could not remap core module base\n");76 return;77 }78 }79 80 parent_name = of_clk_get_parent_name(np, 0);81 clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base);82 if (!IS_ERR(clk))83 of_clk_add_provider(np, of_clk_src_simple_get, clk);84}85 86static void __init of_integrator_cm_osc_setup(struct device_node *np)87{88 cm_osc_setup(np, &cm_auxosc_desc);89}90CLK_OF_DECLARE(integrator_cm_auxosc_clk,91 "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup);92 93static void __init of_versatile_cm_osc_setup(struct device_node *np)94{95 cm_osc_setup(np, &versatile_auxosc_desc);96}97CLK_OF_DECLARE(versatile_cm_auxosc_clk,98 "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup);99