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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>
160 lines
3.1 KiB
C
160 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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* Copyright 2012 Linaro Ltd.
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*/
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#include <linux/clk-provider.h>
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#include <linux/export.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include "clk.h"
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/**
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* struct clk_pfd - IMX PFD clock
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* @hw: clock source
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* @reg: PFD register address
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* @idx: the index of PFD encoded in the register
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*
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* PFD clock found on i.MX6 series. Each register for PFD has 4 clk_pfd
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* data encoded, and member idx is used to specify the one. And each
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* register has SET, CLR and TOG registers at offset 0x4 0x8 and 0xc.
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*/
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struct clk_pfd {
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struct clk_hw hw;
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void __iomem *reg;
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u8 idx;
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};
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#define to_clk_pfd(_hw) container_of(_hw, struct clk_pfd, hw)
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#define SET 0x4
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#define CLR 0x8
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#define OTG 0xc
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static int clk_pfd_enable(struct clk_hw *hw)
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{
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struct clk_pfd *pfd = to_clk_pfd(hw);
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writel_relaxed(1 << ((pfd->idx + 1) * 8 - 1), pfd->reg + CLR);
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return 0;
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}
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static void clk_pfd_disable(struct clk_hw *hw)
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{
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struct clk_pfd *pfd = to_clk_pfd(hw);
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writel_relaxed(1 << ((pfd->idx + 1) * 8 - 1), pfd->reg + SET);
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}
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static unsigned long clk_pfd_recalc_rate(struct clk_hw *hw,
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unsigned long parent_rate)
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{
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struct clk_pfd *pfd = to_clk_pfd(hw);
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u64 tmp = parent_rate;
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u8 frac = (readl_relaxed(pfd->reg) >> (pfd->idx * 8)) & 0x3f;
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tmp *= 18;
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do_div(tmp, frac);
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return tmp;
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}
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static int clk_pfd_determine_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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u64 tmp = req->best_parent_rate;
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u8 frac;
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tmp = tmp * 18 + req->rate / 2;
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do_div(tmp, req->rate);
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frac = tmp;
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if (frac < 12)
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frac = 12;
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else if (frac > 35)
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frac = 35;
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tmp = req->best_parent_rate;
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tmp *= 18;
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do_div(tmp, frac);
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req->rate = tmp;
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return 0;
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}
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static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
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unsigned long parent_rate)
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{
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struct clk_pfd *pfd = to_clk_pfd(hw);
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u64 tmp = parent_rate;
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u8 frac;
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tmp = tmp * 18 + rate / 2;
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do_div(tmp, rate);
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frac = tmp;
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if (frac < 12)
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frac = 12;
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else if (frac > 35)
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frac = 35;
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writel_relaxed(0x3f << (pfd->idx * 8), pfd->reg + CLR);
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writel_relaxed(frac << (pfd->idx * 8), pfd->reg + SET);
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return 0;
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}
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static int clk_pfd_is_enabled(struct clk_hw *hw)
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{
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struct clk_pfd *pfd = to_clk_pfd(hw);
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if (readl_relaxed(pfd->reg) & (1 << ((pfd->idx + 1) * 8 - 1)))
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return 0;
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return 1;
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}
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static const struct clk_ops clk_pfd_ops = {
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.enable = clk_pfd_enable,
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.disable = clk_pfd_disable,
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.recalc_rate = clk_pfd_recalc_rate,
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.determine_rate = clk_pfd_determine_rate,
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.set_rate = clk_pfd_set_rate,
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.is_enabled = clk_pfd_is_enabled,
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};
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struct clk_hw *imx_clk_hw_pfd(const char *name, const char *parent_name,
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void __iomem *reg, u8 idx)
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{
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struct clk_pfd *pfd;
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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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pfd = kzalloc_obj(*pfd);
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if (!pfd)
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return ERR_PTR(-ENOMEM);
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pfd->reg = reg;
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pfd->idx = idx;
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init.name = name;
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init.ops = &clk_pfd_ops;
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init.flags = 0;
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init.parent_names = &parent_name;
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init.num_parents = 1;
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pfd->hw.init = &init;
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hw = &pfd->hw;
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ret = clk_hw_register(NULL, hw);
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if (ret) {
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kfree(pfd);
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return ERR_PTR(ret);
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}
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return hw;
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}
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EXPORT_SYMBOL_GPL(imx_clk_hw_pfd);
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