mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-03-22 07:27:12 +08:00
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
145 lines
2.9 KiB
C
145 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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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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#define SYSTEM_MAX_ID 31
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#define SYSTEM_MAX_NAME_SZ 32
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#define to_clk_system(hw) container_of(hw, struct clk_system, hw)
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struct clk_system {
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struct clk_hw hw;
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struct regmap *regmap;
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struct at91_clk_pms pms;
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u8 id;
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};
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static inline int is_pck(int id)
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{
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return (id >= 8) && (id <= 15);
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}
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static inline bool clk_system_ready(struct regmap *regmap, int id)
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{
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unsigned int status;
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regmap_read(regmap, AT91_PMC_SR, &status);
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return !!(status & (1 << id));
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}
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static int clk_system_prepare(struct clk_hw *hw)
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{
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struct clk_system *sys = to_clk_system(hw);
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regmap_write(sys->regmap, AT91_PMC_SCER, 1 << sys->id);
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if (!is_pck(sys->id))
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return 0;
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while (!clk_system_ready(sys->regmap, sys->id))
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cpu_relax();
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return 0;
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}
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static void clk_system_unprepare(struct clk_hw *hw)
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{
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struct clk_system *sys = to_clk_system(hw);
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regmap_write(sys->regmap, AT91_PMC_SCDR, 1 << sys->id);
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}
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static int clk_system_is_prepared(struct clk_hw *hw)
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{
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struct clk_system *sys = to_clk_system(hw);
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unsigned int status;
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regmap_read(sys->regmap, AT91_PMC_SCSR, &status);
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if (!(status & (1 << sys->id)))
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return 0;
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if (!is_pck(sys->id))
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return 1;
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regmap_read(sys->regmap, AT91_PMC_SR, &status);
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return !!(status & (1 << sys->id));
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}
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static int clk_system_save_context(struct clk_hw *hw)
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{
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struct clk_system *sys = to_clk_system(hw);
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sys->pms.status = clk_system_is_prepared(hw);
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return 0;
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}
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static void clk_system_restore_context(struct clk_hw *hw)
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{
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struct clk_system *sys = to_clk_system(hw);
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if (sys->pms.status)
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clk_system_prepare(&sys->hw);
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}
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static const struct clk_ops system_ops = {
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.prepare = clk_system_prepare,
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.unprepare = clk_system_unprepare,
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.is_prepared = clk_system_is_prepared,
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.save_context = clk_system_save_context,
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.restore_context = clk_system_restore_context,
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};
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struct clk_hw * __init
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at91_clk_register_system(struct regmap *regmap, const char *name,
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const char *parent_name, struct clk_hw *parent_hw, u8 id,
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unsigned long flags)
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{
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struct clk_system *sys;
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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 (!(parent_name || parent_hw) || id > SYSTEM_MAX_ID)
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return ERR_PTR(-EINVAL);
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sys = kzalloc_obj(*sys);
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if (!sys)
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return ERR_PTR(-ENOMEM);
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init.name = name;
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init.ops = &system_ops;
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if (parent_hw)
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init.parent_hws = (const struct clk_hw **)&parent_hw;
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else
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init.parent_names = &parent_name;
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init.num_parents = 1;
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init.flags = CLK_SET_RATE_PARENT | flags;
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sys->id = id;
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sys->hw.init = &init;
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sys->regmap = regmap;
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hw = &sys->hw;
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ret = clk_hw_register(NULL, &sys->hw);
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if (ret) {
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kfree(sys);
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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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