2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* drivers/clk/at91/clk-slow.c
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*
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* Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
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*/
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#include <linux/clk-provider.h>
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#include <linux/clkdev.h>
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#include <linux/clk/at91_pmc.h>
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#include <linux/of.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include "pmc.h"
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struct clk_sam9260_slow {
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struct clk_hw hw;
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struct regmap *regmap;
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};
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#define to_clk_sam9260_slow(hw) container_of(hw, struct clk_sam9260_slow, hw)
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static u8 clk_sam9260_slow_get_parent(struct clk_hw *hw)
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{
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struct clk_sam9260_slow *slowck = to_clk_sam9260_slow(hw);
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unsigned int status;
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regmap_read(slowck->regmap, AT91_PMC_SR, &status);
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return status & AT91_PMC_OSCSEL ? 1 : 0;
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}
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static const struct clk_ops sam9260_slow_ops = {
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.get_parent = clk_sam9260_slow_get_parent,
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};
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struct clk_hw * __init
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at91_clk_register_sam9260_slow(struct regmap *regmap,
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const char *name,
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const char **parent_names,
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int num_parents)
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{
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struct clk_sam9260_slow *slowck;
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struct clk_hw *hw;
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struct clk_init_data init;
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int ret;
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if (!name)
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return ERR_PTR(-EINVAL);
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if (!parent_names || !num_parents)
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return ERR_PTR(-EINVAL);
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slowck = kzalloc(sizeof(*slowck), GFP_KERNEL);
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if (!slowck)
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return ERR_PTR(-ENOMEM);
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init.name = name;
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init.ops = &sam9260_slow_ops;
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init.parent_names = parent_names;
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init.num_parents = num_parents;
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init.flags = 0;
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slowck->hw.init = &init;
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slowck->regmap = regmap;
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hw = &slowck->hw;
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ret = clk_hw_register(NULL, &slowck->hw);
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if (ret) {
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kfree(slowck);
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hw = ERR_PTR(ret);
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}
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return hw;
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}
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