mirror of
https://github.com/edk2-porting/linux-next.git
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9e5ef7a57c
As the commit 2893c37946 ("clk: make strings in parent name arrays
const"), let's make the parent strings const, otherwise we may meet
the following warning when compiling:
drivers/clk/imx/clk-imx7ulp.c: In function 'imx7ulp_clocks_init':
drivers/clk/imx/clk-imx7ulp.c:73:35: warning: passing argument 5 of
'imx_clk_mux_flags' discards 'const' qualifier from pointer target type
clks[IMX7ULP_CLK_APLL_PRE_SEL] = imx_clk_mux_flags("apll_pre_sel", base + 0x508, 0,
1, pll_pre_sels, ARRAY_SIZE(pll_pre_sels), CLK_SET_PARENT_GATE);
^
In file included from drivers/clk/imx/clk-imx7ulp.c:23:0:
drivers/clk/imx/clk.h:200:27: note: expected 'const char **' but argument is
of type 'const char * const*'
...
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/*
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* Copyright (C) 2013 Freescale Semiconductor, Inc.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/clk-provider.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include "clk.h"
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/**
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* struct clk_fixup_mux - imx integer fixup multiplexer clock
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* @mux: the parent class
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* @ops: pointer to clk_ops of parent class
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* @fixup: a hook to fixup the write value
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*
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* The imx fixup multiplexer clock is a subclass of basic clk_mux
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* with an addtional fixup hook.
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*/
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struct clk_fixup_mux {
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struct clk_mux mux;
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const struct clk_ops *ops;
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void (*fixup)(u32 *val);
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};
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static inline struct clk_fixup_mux *to_clk_fixup_mux(struct clk_hw *hw)
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{
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struct clk_mux *mux = to_clk_mux(hw);
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return container_of(mux, struct clk_fixup_mux, mux);
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}
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static u8 clk_fixup_mux_get_parent(struct clk_hw *hw)
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{
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struct clk_fixup_mux *fixup_mux = to_clk_fixup_mux(hw);
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return fixup_mux->ops->get_parent(&fixup_mux->mux.hw);
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}
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static int clk_fixup_mux_set_parent(struct clk_hw *hw, u8 index)
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{
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struct clk_fixup_mux *fixup_mux = to_clk_fixup_mux(hw);
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struct clk_mux *mux = to_clk_mux(hw);
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unsigned long flags = 0;
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u32 val;
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spin_lock_irqsave(mux->lock, flags);
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val = readl(mux->reg);
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val &= ~(mux->mask << mux->shift);
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val |= index << mux->shift;
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fixup_mux->fixup(&val);
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writel(val, mux->reg);
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spin_unlock_irqrestore(mux->lock, flags);
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return 0;
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}
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static const struct clk_ops clk_fixup_mux_ops = {
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.get_parent = clk_fixup_mux_get_parent,
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.set_parent = clk_fixup_mux_set_parent,
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};
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struct clk *imx_clk_fixup_mux(const char *name, void __iomem *reg,
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u8 shift, u8 width, const char * const *parents,
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int num_parents, void (*fixup)(u32 *val))
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{
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struct clk_fixup_mux *fixup_mux;
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struct clk *clk;
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struct clk_init_data init;
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if (!fixup)
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return ERR_PTR(-EINVAL);
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fixup_mux = kzalloc(sizeof(*fixup_mux), GFP_KERNEL);
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if (!fixup_mux)
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return ERR_PTR(-ENOMEM);
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init.name = name;
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init.ops = &clk_fixup_mux_ops;
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init.parent_names = parents;
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init.num_parents = num_parents;
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init.flags = 0;
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fixup_mux->mux.reg = reg;
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fixup_mux->mux.shift = shift;
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fixup_mux->mux.mask = BIT(width) - 1;
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fixup_mux->mux.lock = &imx_ccm_lock;
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fixup_mux->mux.hw.init = &init;
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fixup_mux->ops = &clk_mux_ops;
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fixup_mux->fixup = fixup;
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clk = clk_register(NULL, &fixup_mux->mux.hw);
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if (IS_ERR(clk))
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kfree(fixup_mux);
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return clk;
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}
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