diff options
Diffstat (limited to 'kernel/arch/arm/mach-imx/clk-fixup-div.c')
-rw-r--r-- | kernel/arch/arm/mach-imx/clk-fixup-div.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-fixup-div.c b/kernel/arch/arm/mach-imx/clk-fixup-div.c deleted file mode 100644 index 21db020b1..000000000 --- a/kernel/arch/arm/mach-imx/clk-fixup-div.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * Copyright (C) 2013 Freescale Semiconductor, Inc. - * - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html - */ - -#include <linux/clk-provider.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/slab.h> -#include "clk.h" - -#define to_clk_div(_hw) container_of(_hw, struct clk_divider, hw) -#define div_mask(d) ((1 << (d->width)) - 1) - -/** - * struct clk_fixup_div - imx integer fixup divider clock - * @divider: the parent class - * @ops: pointer to clk_ops of parent class - * @fixup: a hook to fixup the write value - * - * The imx fixup divider clock is a subclass of basic clk_divider - * with an addtional fixup hook. - */ -struct clk_fixup_div { - struct clk_divider divider; - const struct clk_ops *ops; - void (*fixup)(u32 *val); -}; - -static inline struct clk_fixup_div *to_clk_fixup_div(struct clk_hw *hw) -{ - struct clk_divider *divider = to_clk_div(hw); - - return container_of(divider, struct clk_fixup_div, divider); -} - -static unsigned long clk_fixup_div_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) -{ - struct clk_fixup_div *fixup_div = to_clk_fixup_div(hw); - - return fixup_div->ops->recalc_rate(&fixup_div->divider.hw, parent_rate); -} - -static long clk_fixup_div_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *prate) -{ - struct clk_fixup_div *fixup_div = to_clk_fixup_div(hw); - - return fixup_div->ops->round_rate(&fixup_div->divider.hw, rate, prate); -} - -static int clk_fixup_div_set_rate(struct clk_hw *hw, unsigned long rate, - unsigned long parent_rate) -{ - struct clk_fixup_div *fixup_div = to_clk_fixup_div(hw); - struct clk_divider *div = to_clk_div(hw); - unsigned int divider, value; - unsigned long flags = 0; - u32 val; - - divider = parent_rate / rate; - - /* Zero based divider */ - value = divider - 1; - - if (value > div_mask(div)) - value = div_mask(div); - - spin_lock_irqsave(div->lock, flags); - - val = readl(div->reg); - val &= ~(div_mask(div) << div->shift); - val |= value << div->shift; - fixup_div->fixup(&val); - writel(val, div->reg); - - spin_unlock_irqrestore(div->lock, flags); - - return 0; -} - -static const struct clk_ops clk_fixup_div_ops = { - .recalc_rate = clk_fixup_div_recalc_rate, - .round_rate = clk_fixup_div_round_rate, - .set_rate = clk_fixup_div_set_rate, -}; - -struct clk *imx_clk_fixup_divider(const char *name, const char *parent, - void __iomem *reg, u8 shift, u8 width, - void (*fixup)(u32 *val)) -{ - struct clk_fixup_div *fixup_div; - struct clk *clk; - struct clk_init_data init; - - if (!fixup) - return ERR_PTR(-EINVAL); - - fixup_div = kzalloc(sizeof(*fixup_div), GFP_KERNEL); - if (!fixup_div) - return ERR_PTR(-ENOMEM); - - init.name = name; - init.ops = &clk_fixup_div_ops; - init.flags = CLK_SET_RATE_PARENT; - init.parent_names = parent ? &parent : NULL; - init.num_parents = parent ? 1 : 0; - - fixup_div->divider.reg = reg; - fixup_div->divider.shift = shift; - fixup_div->divider.width = width; - fixup_div->divider.lock = &imx_ccm_lock; - fixup_div->divider.hw.init = &init; - fixup_div->ops = &clk_divider_ops; - fixup_div->fixup = fixup; - - clk = clk_register(NULL, &fixup_div->divider.hw); - if (IS_ERR(clk)) - kfree(fixup_div); - - return clk; -} |