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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a183da637c
If the ICST clock has a parent, respect the rate of the parent when calculating the clock frequency. As this involves modifying the ICST parameter struct, make a cloned copy (the divisor arrays should be safe) so we can update the .ref field. Do not define the reference clock on the Integrator as we have the reference clock from the device tree. Keep it everywhere else. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* Clock driver for the ARM Integrator/AP and Integrator/CP boards
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* Copyright (C) 2012 Linus Walleij
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk-provider.h>
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#include <linux/clk.h>
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#include <linux/clkdev.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 "clk-icst.h"
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#define INTEGRATOR_HDR_LOCK_OFFSET 0x14
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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 __initdata cm_auxosc_desc = {
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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 void __init of_integrator_cm_osc_setup(struct device_node *np)
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{
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struct clk *clk = ERR_PTR(-EINVAL);
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const char *clk_name = np->name;
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const struct clk_icst_desc *desc = &cm_auxosc_desc;
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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 (!np) {
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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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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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CLK_OF_DECLARE(integrator_cm_auxosc_clk,
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"arm,integrator-cm-auxosc", of_integrator_cm_osc_setup);
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