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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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25f5550f5a
Introduce a new clock workaround function used by DT reference code on the mach-shmobile subarchitecture. The new function shmobile_clk_workaround() is used to configure clkdev to allow DT and platform devices to coexist. It is possible for the DT reference board code to also request enabling of the clock in case the driver does not implement clock control. Signed-off-by: Magnus Damm <damm@opensource.se> [horms+renesas@verge.net.au: Removed trailing blank line] Reviewed-by: Wolfram Sang <wsa@sang-engineering.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
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* SH-Mobile Clock Framework
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*
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* Copyright (C) 2010 Magnus Damm
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*
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* Used together with arch/arm/common/clkdev.c and drivers/sh/clk.c.
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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 as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#ifdef CONFIG_COMMON_CLK
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <mach/clock.h>
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void __init shmobile_clk_workaround(const struct clk_name *clks,
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int nr_clks, bool enable)
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{
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const struct clk_name *clkn;
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struct clk *clk;
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unsigned int i;
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for (i = 0; i < nr_clks; ++i) {
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clkn = clks + i;
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clk = clk_get(NULL, clkn->clk);
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if (!IS_ERR(clk)) {
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clk_register_clkdev(clk, clkn->con_id, clkn->dev_id);
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if (enable)
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clk_prepare_enable(clk);
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clk_put(clk);
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}
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}
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}
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#else /* CONFIG_COMMON_CLK */
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#include <linux/sh_clk.h>
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#include <linux/export.h>
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#include <mach/clock.h>
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#include <mach/common.h>
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unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk)
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{
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struct clk_ratio *p = clk->priv;
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return clk->parent->rate / p->div * p->mul;
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};
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struct sh_clk_ops shmobile_fixed_ratio_clk_ops = {
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.recalc = shmobile_fixed_ratio_clk_recalc,
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};
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int __init shmobile_clk_init(void)
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{
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/* Kick the child clocks.. */
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recalculate_root_clocks();
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/* Enable the necessary init clocks */
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clk_enable_init_clocks();
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return 0;
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}
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int __clk_get(struct clk *clk)
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{
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return 1;
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}
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EXPORT_SYMBOL(__clk_get);
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void __clk_put(struct clk *clk)
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{
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}
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EXPORT_SYMBOL(__clk_put);
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#endif /* CONFIG_COMMON_CLK */
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